Timstar

A simple stethoscope.

For testing inhaled and exhaled air. Consisting of two test tubes 150 24 mm, two lengths of glass tubing, connected by PVC tubing with plastic T- piece.

For investigating tidal volumes, respiratory rate, pulmonary ventilation, reserve volumes and vital capacity. Oxygen consumption can also be measured which is useful in metabolic rate studies. A simple lever control enables the subject to be connected either to the atmosphere or to the float for recording. A container for soda lime crystals is fitted which absorbs the CO2. The spirometer is designed to offer minimal resistance to airflow. This provides the user with greater comfort and ensures accurate results. The float is constructed from lightweight plastic and is calibrated in 0.5 litre steps with maximum capacity of 7 litres. A pen arm allows attachment of a fibre tipped pen for recording results or for attachment to a position sensor for datalogging. Two flexible corrugated breathing hoses 0.8 m long are provided. Supplied with two mouth pieces and noseclip. Complete with full instructions.

Pack of 100 spare mouthpieces for the Clifton Spirometer.

Disposable breathing filter for the Clifton Spirometer.

Translucent, natural colour sheet. Dimensions (L x W x D): 1 m x 1 m x 0.25 mm.

Kit containing all the necessary parts to make a lung model demonstration. Includes Bell jar, single hole bung, 'Y' shape adapter to fit in to bung, balloons, cable ties to hold balloons on to adapter, latex rubber sheet to attach to bottom of bell jar using rubber band (or string). By pulling down or pushing up the latex sheet, the balloons can be made to inflate or deflate, simulating the effect of the diaphragm on the lungs.

Disclosing Tablets help to identify plaque (a mixture of acid producing bacteria and sugars) on teeth by dyeing the plaque bright colour. This indicates the areas that need to be cleaned more thoroughly. The tablets are chewed then spread around the teeth using the tongue.

Durable hinged model with realistic shapes and details of a full set of adult teeth. Size 100 x 90 x 70 mm.

The food calorimeter offers superior method of measuring the energy in foodstuff, compared to burning it under boiling tube of water. The enclosed vessel and copper tube ensure that more of the food's energy is used to heat up the water, and less heat is lost to the environment, increasing the accuracy of the experiment. The unit comprises glass jacket with bell jar inside. spiral copper tube draws air through the bell jar, in which food is burning, transferring more of the heat to the water. The lid has holes for thermometer and stirrer. The base unit (BI180105) has clips to hold the calorimeter unit securely, crucible holder, and posts for replaceable ignition coil. The bottom of the base has 4 mm sockets for connecting power supply to the ignition coil. A sample of food is placed in the crucible, the calorimeter unit placed over the top, and filled with water. The power to the ignition coil is turned on, and the food ignited. The temperature of the water is recorded, and the energy released can be calculated from the temperature change. To increase accuracy further, the calorimeter can be calibrated using spirit with known energy density. Also required: a 12 V power supply, 4 mm plug leads, a 0.1 g resolution balance and crucible. Please note that the calorimeter unit and base are sold separately, and both are required. Dimensions Body: (H) 215 mm, (H) including stirrer 275 mm, (D) 100 mm Dimensions Base: (H) 110 mm, (L) Retort Clamp 70 mm, (L) Total 170 mm, (D) 100 mm

For BI180100, Food Calorimeter.The base unit has clips to hold the calorimeter unit securely, crucible holder, and posts for replaceable ignition coil. The bottom of the base has 4 mm sockets for connecting power supply to the ignition coil. A sample of food is placed in the crucible, the calorimeter unit placed over the top, and filled with water. The power to the ignition coil is turned on, and the food ignited. The temperature of the water is recorded, and the energy released can be calculated from the temperature change. To increase accuracy further, the calorimeter can be calibrated using spirit with known energy density. Also required: a 12 V power supply, mm plug leads, 0.1 g resolution balance and crucible. Please note that the calorimeter unit and base are sold separately, and both are required. Dimensions Body: (H) 215 mm, (H) including stirrer 275 mm, (D) 100 mm Dimensions Base: (H) 110 mm, (L) Retort Clamp 70 mm, (L) Total 170 mm, (D) 100 mm

PTC (pheylthiocarbamide) taste test paper test for the genetically controlled ability to taste this substance. Consisting of paper strips impregnated with a harmless quantity of test substance (or untreated in the case of the control strips), subjects will be able to detect (or not) varying tastes or degrees of intensity of taste. 1.Remove a PTC taste test paper from the vial. 2.Stick out your tongue and place the strip on your tongue. 3.There are three basic results: bland, bitter, or vile. The ability to taste these substances is known to be genetically linked (inherited) and depends on the presence of dominant or recessive genes. Having the ability to taste one substance does not necessarily imply that different substance will also be detected. PTC (phenylthiocarbamide) test strips have bitter taste for some individuals, the intensity of which can vary and depends upon a homozygous dominant or heterozygous condition in the individual. PTC Taste Test Paper is perfectly safe to use. Any possible toxicity of PTC would be in grams per kilogram of body weight, which is millions of times greater than anything which would be found in these taste test strips. Phenylthiocarbamide (PTC) is present at only 20 micrograms per strip. At this level, the compound is negligible and harmless.

PTC (pheylthiocarbamide) taste test paper test for the genetically controlled ability to taste this substance. Consisting of paper strips impregnated with a harmless quantity of test substance (or untreated in the case of the control strips), subjects will be able to detect (or not) varying tastes or degrees of intensity of taste. 1.Remove a PTC taste test paper from the vial. 2.Stick out your tongue and place the strip on your tongue. 3.There are three basic results: bland, bitter, or vile. The ability to taste these substances is known to be genetically linked (inherited) and depends on the presence of dominant or recessive genes. Having the ability to taste one substance does not necessarily imply that different substance will also be detected. PTC (phenylthiocarbamide) test strips have bitter taste for some individuals, the intensity of which can vary and depends upon a homozygous dominant or heterozygous condition in the individual. PTC Taste Test Paper is perfectly safe to use. Any possible toxicity of PTC would be in grams per kilogram of body weight, which is millions of times greater than anything which would be found in these taste test strips. Phenylthiocarbamide (PTC) is present at only 20 micrograms per strip. At this level, the compound is negligible and harmless.

Sodium benzoate test paper detects the genetic ability to taste Sodium Benzoate. The taste detected varies from sweet, salty, to bitter, depending upon the individual. Homozygous-dominant and Heterozygous-dominant individuals will detect the molecule. 1.Remove a strip of test paper from the vial. 2.Stick out your tongue and place the strip on your tongue. 3.You may not taste anything, but if you do, there are three basic results: sweet, salty, and bitter.

Thiourea test paper test for the genetic capability to detect Thiourea. For other taste tests, see our PTC and Sodium Benzoate test papers. 1.Remove a Thiourea test paper from the vial. 2.Place the test strip on your tongue and it will either taste bitter or it won’t taste like anything at all.

The Control Paper does not contain any added chemicals, and is simply designed to act as the control in taste test experiments. 1.Remove one strip of Control Paper from the vial. 2.Stick out your tongue and place the strip on your tongue. 3.The strip is tasteless, and thus should not stimulate a reaction.

Designed for use in education. Features include large easy to read LCD, simple one button operation, counts number of steps from to 99999, strong metal belt/clothing clip and reset button that has 2 second press and hold delay to avoid accidental resetting. Complete with SR44 battery.

A good value, quality digital Hand Dynamometer with large LCD. Used for measuring hand grip strength in kilograms. Made of high quality and durable plastic and features an adjustable grip to account for different hand sizes. Can be used to auto capture maximum grip strength or it can be set up to save and store results for up to 19 users. Also rates strength according to age and sex if this has been set up in the instrument prior to testing.

A small compact kit, with a full range of contraceptive samples/placebos. Ideal for any session on contraception. A good resource to use alongside the Contraception Board Game and the Safer Sex Kit. • Condoms 1 female, 3 male and 1 latex free • Plastic model IUD/IUS and mini booklet • Plastic model Implant and picture card • Picture cards showing contraceptive pills (28 day, 21 day, emergency pill) • Contraceptive injection photo card • Diaphragm • Lubricant sachet • Contraceptive patch stickers x 3 • Placebo vaginal ring • Methods of contraception booklet

Condom Demonstrator for Safer Sex Education. Condoms are for demonstration purposes only.

Condoms are for demonstration purposes only.

Reagent strips for qualitative test for glucose in urine. Alternative to Clinistix.

Reagent strips for testing protein in urine. Alternative to Albustix.

High quality reagent test strips used for urinalysis. Supplied in a pack of 50. Albustix test for Protein (p).

Pack of 50 Diastix, clinical test strips.

High quality reagent strips for urinalysis, supplied in a pack of 50. Uristix test for Glucose (g) and Protein (p).

Bacti-Caps provide firm, positive culture tube closure whilst allowing controlled gas interchange. They are an excellent and more practical alternative to wool or foam plugs. Suitable for most standard rimless test tube sizes. Made from chemically resistant plastic, colour coded and autoclavable.

Nichrome, designed to be held in needle holder. (DI05920).

Flexible loops for easier collection and inoculation Volume: 10 µl Length: 200 mm Sterilised by irradiation

Non-Sterile, disposable. NOT individually wrapped. Polystyrene, free from heavy metal.

For the measurement and collection of gas evolved by aquatic plants during photosynthesis. The gas evolved can be measured by the calibrated capillary tube and drawn off for analysis by the plastic syringes. Mounted on plastic panel 190 x 150 mm.

For demonstration of heliotropism and geotropism. Germinating seedlings are pinned to the cork table which is rotated by an electric motor at 4 revolutions per hour. The motor is spindle mounted and may be clamped so that the place of the table can be set at any angle between horizontal and vertical. An acrylic cover is provided for the cork table to shield the seedlings from draughts. The cork disc has 10 cm diameter.

For investigating the uptake of water and transpiration of cut shoot. The apparatus can be submerged in basin of water while the cut stem is mounted. The graduated capillary tube is 100 mm long with a 1 mm bore. Mounted on stand. Dimensions (H x W x D): 140 x 85 x 65 mm.

Consisting of a graduated narrow bore glass tube fitted with a vessel to take a plant shoot at one end and a funnel with glass stopcock mounted vertically. Complete with wooden stand.

Set comprises: Astacus testis v.s., Locust testis v.s., Locust testis squash, Locust embryo squash, Allium root-tip l.s., Lilium anthers t.s. early prophase, Lilium anthers t.s. late prophase, Lilium anthers t.s. metaphase, Lilium anthers t.s. late first division, Lilium anthers t.s. second division.

Spare Cover Glasses for Glass Haemacytometer MI160322). Supplied as a pack of 2.

Cover slips No. 0. Resistance Glass 0.09 to 0.13 mm thick. 18 mm x 18 mm. Supplied in a pack of 100.

Cover slips No. 0. Resistance Glass 0.09 to 0.13 mm thick. 22 mm x 22 mm. Supplied in a pack of 100.

Cover slips No. 1. Resistance Glass 0.13 to 0.16 mm thick. 18 mm x 18 mm. Supplied in a pack of 100.

Cover slips No. 1. Resistance Glass 0.13 to 0.16 mm thick. 22 mm x 22 mm. Supplied in a pack of 100.

Cover slips No.1½. Resistance Glass 0.16 to 0.19 mm thick. 18 mm x 18 mm. Supplied in a pack of 100.

Cover slips No.1½. Resistance Glass 0.16 to 0.19 mm thick. 20 mm x 20 mm. Supplied in a pack of 100.

Cover slips No.1½. Resistance Glass 0.16 to 0.19 mm thick. 22 mm x 22 mm. Supplied in a pack of 100.

Cover slips No. 2. Resistance Glass 0.19 to 0.25 mm. 18 mm x 18 mm. Supplied in a pack of 100.

Cover slips No. 2. Resistance Glass 0.19 to 0.25 mm. 22 mm x 22 mm. Supplied in a pack of 100.

Stainless steel with spatula ends.

Two hinged flaps and numbered positions.

A hand microtome suitable for section cutting. The milled head at the base when revolved records 10 microns per click. Brass top plate 75 mm diameter. Overall length 85 mm. Supplied in hinged wooden case.

Clear polished glass, 6 mm deep cavity with flat glass cover. 40 mm x 40 mm.

Glass microscope slides with single frosted panel to allow marking of the slide. These come with tissue paper separating each slide and have ground edges. Dimensions: 76 mm x 26 mm. 1.0 mm thickness. Supplied in a pack of 50.

Washed with 45° ground edges. External cellophane wrapping, interleaved. Dimensions: 76 mm x 26 mm. A thickness of 1.0 to 1.2 mm. Supplied in a pack of 50.

Washed with 45° ground edges. Internal cellophane wrapping with easy-open tear strip. Dimensions: 76 mm x 26 mm. A thickness of 0.8 to 1.0 mm. Supplied in a pack of 50.

Washed with 45° ground edges. Internal cellophane wrapping with easy-open tear strip. Dimensions: 76 mm x 26 mm. A thickness of 1.0 to 1.2 mm. Supplied in a pack of 50.

Washed with 45° ground edges. Internal cellophane wrapping with easy-open tear strip. Dimensions: 76 mm x 26 mm. A thickness of 1.2 to 1.5 mm. Supplied in a pack of 50.

Microscope slides with round, polished 15 mm diameter cavity. Dimensions: 76 x 26 x 1.2 mm (L x W x D). Supplied in a pack of 50.

Widefield eyepiece. WF15X/12mm. Suitable for SFC-100 series, F-1110 LED, F-1115 LED, DM-1802, BA50 Cordless, BA50-X

19 mm eyepiece graticule 10 x 0.1 mm with holder.

• Monocular head 45° inclined 360° rotation • WF10x 18 mm lockable eyepiece • X4, x10, x40, x100 Semi-Planachromatic, DIN objectives • Built-in rackless mechanical stage • Coarse fine focus • 1.25 NA Abbe condenser with iris diaphragm • 3 W LED illumination • Immersion oil dust cover included • Dimensions: 245 x 190 x 380 mm • Weight: 6.8 kg • 5 year warranty

• Binocular head 45° inclined 360° rotation • WF10x 18 mm lockable eyepiece • X4, x10, x40, x100 Semi-Planachromatic, DIN objectives • Built-in rackless mechanical stage • Coarse fine focus • 1.25 NA Abbe condenser with iris diaphragm • 3 W LED illumination • Immersion oil dust cover included • Dimensions: 245 190 380 mm • Weight: 6.8 kg • 5 year warranty

Specification: • Monocular head inclined 30° with built-in 5.0 mega pixel CMOS Camera • x10 wide field eyepiece • Achromatic objectives x4, x10, x40 • Quadruple revolving nosepiece • Coarse and fine focusing • Built-in mechanical stage • Focusable 1.25 N.A. Abbe condenser with iris diaphragm • Built-in halogen illumination 12V/20W with intensity control • Supplied with Motic Images Plus 2.0 Software (multi-language version) • USB 2.0 PC connection

The versatile BA50-X WiFi digital microscope represents the latest in educational technology. This digital microscope transmits live images to wireless laptops, iOS or Android Tablets. Featuring high-speed, full resolution imaging technology built into the head of the microscope, the BA50-X can be used as normal microscope with the built-in eyepiece, or used to share live images with your class, using WiFi tablets or Windows Laptops. Please note: connection to the microscope camera is exclusively over WiFi, using the microscope's own ad hoc network. The USB port is for power only. Specification: • Optical System: Finite optical system, 160 mm • Observation tube: Monocular with built in digital type Wi-Fi camera • Inclination: 30° inclined, 360° rotating • Camera sensor: CMOS 1/3"" 4.0 MP 1920x1080 pixels • Output: Wi-Fi transmission up to 1.3 MP • Eyepieces: WF10X/18 mm • Nosepiece: Reversed triple revolving nosepiece • Objective classification: Achromatic objectives, DIN • Objectives: 4X/0.10, 10X/0.25, X/0.65/S • Objective mounting thread: 4/5""x1/36"" (RMS standard) • Stage: Gliding stage with ""one-touch"" sample holder • Stage size: 105 mm (Diameter) • Upper limit stop: Upper limit stop pre-set but adjustable • Condenser: Built in 0.65 N.A. with disc diaphragm • Focus mechanism: Separate coarse and fine focusing system • Fine Focus precision: µm minimum increment • Z-axis movement: mm • Filter: Built-in frosted glass • Illumination: LED 20 mA, 3.5 V, 70 mW with intensity control • Transformer: External • Power supply: Charger 100-240 or rechargeable batteries • Accessories included: Calibration slide, dust cover, charger and batteries • Software: Motic Images Plus 3.0 for Windows, OSX and Linux, MotiConnect App for iOS and Android • Weight: 2.75 kg • Dimensions (L W H): 175 153 334 mm

Replacement UK power supply suitable for use with range of Motic microscopes. Suitable for the following: • F11 series • SFC100 LED • DM111 • DM52

Achromatic objective 100X/1.25/S, oil immersion. Suitable for SFC-100 series, F-1110 LED, F-1115 LED.

Plastic cover for Motic microscopes to prevent build-up of dust, thus reducing the need for cleaning.

An advanced stereo microscope with up to x40 magnification complete with incident and transmitted tungsten illumination. With the following specification and features: Specification: • Binocular head inclined 45° • x10 wide field eyepieces (paired) • x2, x4 turret type objective • Incident and transmitted tungsten illumination 12V/10W • Rack and pinion focusing • Supplied with dust cover, black/white and frosted stage plates • LIFETIME WARRANTY on optical components

12V/10W tungsten bulb.

Replacement LED bulb for Motic microscopes.

A robust and easy to handle microscope with high-quality optics made of 100% coated glass for crisp and clear images. This LED model runs cool and features built-in rechargeable batteries and comes with mains charger. (Also available with fitted eyepiece graticule – see MI180312) Specification: • Monocular head inclined 45°, with 360° rotation • x10 wide field eyepiece with pointer • x4, x10, and x40 (R) DIN Objectives • Coarse and fine rack and pinion focusing • 0.65 NA condenser • LED 3.5V/70mW illumination with intensity control • Iris diaphragm with filter housing • Supplied with dust cover and blue filter • LIFETIME WARRANTY on optical components

A set of 10 robust and easy to handle microscope with high-quality optics made of 100% coated glass for crisp and clear images. This LED model runs cool and features built-in rechargeable batteries and comes with mains charger. (Also available with fitted eyepiece graticule – see MI180312/10) Specification: • Monocular head inclined 45°, with 360° rotation • x10 wide field eyepiece with pointer • x4, x10, and x40 (R) DIN Objectives • Coarse and fine rack and pinion focusing • 0.65 NA condenser • LED 3.5V/70mW illumination with intensity control • Iris diaphragm with filter housing • Supplied with dust cover and blue filter • LIFETIME WARRANTY on optical components

A robust and easy to handle microscope with high-quality optics made of 100% coated glass for crisp and clear images. Specification: • Monocular head inclined 45°, with 360° rotation • x10 wide field eyepiece with graticule • x4, x10, and x40 (R) DIN Objectives • Coarse and fine rack and pinion focusing • 0.65 NA condenser • Tungsten 220V/20W illumination • Iris diaphragm with filter housing • Supplied with dust cover and blue filter • LIFETIME WARRANTY on optical components

A robust and easy to handle microscope with high-quality optics made of 100% coated glass for crisp and clear images. Specification: • Monocular head inclined 45°, with 360° rotation • x10 wide field eyepiece with graticule • x4, x10, and x40 (R) DIN Objectives • Coarse and fine rack and pinion focusing • 0.65 NA condenser • Tungsten 220V/20W illumination • Iris diaphragm with filter housing • Supplied with dust cover and blue filter • LIFETIME WARRANTY on optical components

Replacement tungsten bulb for microscopes. Suitable for SFC-100 range.

The BA50 is 3/4 size educational microscope with reversed nosepiece LED illumiation. Built-in batteries allow cordless operation. The rugged metal construction and precision mechanics should guarantee many years of use. Specification: • 3/4 size student microscope • Monocular head, inclined 45° and 360° rotating • Widefield eyepiece WF10X/18 mm with pointer • Reversed triple revolving nosepiece • Achromatic objectives 4X, 10X, 40X • Coarse and fine focusing system with tension adjustment • 0.65 N.A. condenser with disc diaphragm • LED illumination 20 mA, 3.5 V, 70 mW with intensity control • Includes dust cover, charger, batteries and calibration slide • Dust cover • 5 year warranty

A 3/4 sized basic microscope combining ease of operation with mechanical strength. Specification: • Vertical monocular head • x10 wide field eyepiece with pointer, lockable • x4, x10 and x40 objectives • Rack and pinion focusing • Rotary disc diaphragm • 42 mm plano-concave mirror • Coarse focussing system • Focussing stroke 28 mm • Dust cover included • 10 year warranty

A pack of 10, 3/4 sized basic microscope combining ease of operation with mechanical strength. Specification: • Vertical monocular head • x10 wide field eyepiece with pointer, lockable • x4, x10 and x40 objectives • Rack and pinion focusing • Rotary disc diaphragm • 42 mm plano-concave mirror • Coarse focussing system • Focussing stroke 28 mm • Dust cover included • 10 year warranty

Mechanical Stage for Microscopes, suitable for SFC-100 series, F-1110, F-1115,

Plastic carry case suitable for the following Motic Models: SFC-100FL, SFC-100FLED, F-1110 LED, F-1115 LED and DM-111. External dimensions 42 x 32 x 21 cm.

A routine biological microscope for schools. Simple to handle, the separate coarse and fine focus mechanism facilitates teaching. The LED illumination with NA 0.65 condenser works well up to 40X objective magnification. Specification: • Monocular head inclined 45°, with 360° rotation • x10 wide field eyepiece with pointer, lockable • x4, x10 x40 DIN Achromatic objectives • Quadruple nosepiece • Built in 0.65 condenser • Coarse and fine focusing • Iris diaphragm with filter holder and blue filter • LED 3.5V/70mW substage illumination • Includes dust cover • 5 year warranty

A routine biological microscope for schools. Simple to handle, the separate coarse and fine focus mechanism facilitates teaching. The LED illumination with NA 1.25 condenser works well with a 100X objective magnification. Specifications: • Monocular head inclined 45°, with 360° rotation • x10 wide field eyepiece with pointer, lockable • x4, x10 x40 DIN Achromatic objectives • Quadruple nosepiece • Built in 1.25 focusable Abbe condenser • Coarse and fine focusing • Iris diaphragm with filter holder and blue filter • Upper limit stop preset but adjustable • LED substage illumination • Includes dust cover • 5 year warranty

The unit is built on heavy cast-iron base. The movement is controlled by knob at the side of the base, and can be fixed in any position with clamping screw, and Vernier scale allows precise measurement to 0.01 mm. The carriage has two locations for the microscope, which allows it to be mounted with its axis in any position relative to travel. The microscope itself features 7x magnification Ramsden objective, 3x magnification 50 mm FL eyepiece, and cross-piece graticule, with rack-and-pinion focusing. Supplied in polished wooden case.

The unit is built on heavy cast-iron base with three levelling screws, with bubble level meter. The horizontal movement is controlled by knob at the left hand side of the base, and can be fixed in any position with clamping screw, and Vernier scale allows precise measurement to 0.02 mm. The total horizontal movement is 210 mm. Vertical movement is by rack-and-pinion, and has its own Vernier scale to 0.02 mm. The total vertical movement is 160 mm. The stage for placing objects for measurement is fitted with Perspex plate. The microscope can be clamped in either vertical or horizontal position, and features 10x magnification 50 mm F.L. achromatic eyepiece. Supplied in polished wooden case.

A model showing the Sun, Earth and Moon, correctly geared to show each month as the Earth orbits the Sun. The Sun is represented by bright lamp. It is particularly useful in demonstrating: Sun's apparent motion: changing length and direction of shadows during day and during season; night and day; changing length of days; seasons; phases of the Moon; eclipses of the Moon and Sun. Dimensions (L H) 650 250mm. Content includes: • Tellurium model • Stick-on model person • Model sundial • Earth axis extension • Two Earths and Moons • Date indicator • Phase of the Moon indicator • Eclipse shadow card, teaching guide • Electrical Operation: 6V transformer supplied

This hands-on model with teaching guide helps pupils understand the solar system including its shape, the sun as the source of its light, planetary orbits, the planets' names and which planets may be seen on given days. Requires 2 x AA batteries to light the sun. Height 100 mm. Diameter of largest Orbit 380 mm.

This item is designed to demonstrate the stabilizing effect of neutrons on the atomic nucleus. The ""protons"" are made of disc magnets while the ""neutrons"" are made of browned iron discs. The ""protons"" will, because they are magnetized, repel one another when placed on flat surface or overhead projector. The stabilizing effect of the ""neutrons"" is illustrated by placing them between the ""protons"", thereby eliminating the repulsive force. The ""protons"" are supplied with red marking, the ""neutrons"" with blue. Supplied as single pieces. The “neutron” can be ordered under product code MO150905.

This item is designed to demonstrate the stabilizing effect of neutrons on the atomic nucleus. The ""protons"" are made of disc magnets while the ""neutrons"" are made of browned iron discs. The ""protons"" will, because they are magnetized, repel one another when placed on flat surface or overhead projector. The stabilizing effect of the ""neutrons"" is illustrated by placing them between the ""protons"", thereby eliminating the repulsive force. The ""protons"" are supplied with red marking, the ""neutrons"" with blue. Supplied as single pieces. The “proton” can be ordered under product code MO150900.

Chain Reaction Apparatus, spare pins only.

Custom designed tongs for handling the radioactive sources RA95622 RA95626. Stainless steel construction. Dimensions (W x L): 12 x 165 mm.

Interface lead to link GM counter RA67530 to PC or laptop.

The Alpha particle Spark Detector from Frederiksen has been developed to enable visualization of alpha particles. The apparatus can be likened to a GM tube, but using atmospheric air instead of the diluted quenching gas in the tube. When alpha particles ionize the air in the spark gap of the detector, bright sparks can be both seen and heard. The apparatus incorporates a transparent lid, which allows clear observation of the sparks. The detector requires connection to safe high voltage (EHT) power supply with voltage range of 0-5 kV or 0-6 kV. The apparatus can be safely used directly on bench top or table and includes a removable threaded steel rod for mounting the unit on a radioactivity bench (RA95610) or squat retort base with thumbscrew (ST96274). • Gives clearly visible and audible response to alpha radiation • Demonstrates the ionization of air by alpha particles • Detects alpha radiation from radioactive minerals or radioactive sources • Allows study of range in air shielding by different materials

This GM counter is the most versatile and easily operated model yet. The counting time can be set to 1, 10, 60 or 100 seconds or set to manual start/stop. Counting may be set to run repeatedly and the last, complete result is displayed in the main display while new counts accumulate in the auxiliary display. The counter accepts both BNC and Jack type GM tubes. With the optional USB connection it can interface with computer and if pulse output for further hardware processing is required, that is also available. For demonstration purposes the authentic clicking Geiger-counter sound may be turned on if preferred. Other improvements over the previous model include lower overall system dead time and lower current consumption, with the unit now being powered by AA batteries. The counter may also be powered from the optional mains adapter.

Geiger-Muller Counter, Mains Adapter for RA67530.

A multipurpose GM tube, sensitive to alpha, beta and gamma radiation. Mounted in housing with protective cover and 10 mm diameter support rod. It is complete with integral lead and BNC connector. This GM tube does NOT have built-in anode resistor, and therefore requires counter with built-in anode resistor. Suitable for use with RA67530. • Window diameter: 9.14 mm • Recommended bias voltage: 500 V • BNC plug

This pack of 500 x 10 mm plastic cubes is used to investigate and demonstrate half-life. Each cube has one black face, the other faces all being yellow. The cubes are thrown or scattered like dice and those which land with the black face uppermost represent radioactive nuclei which have decayed. The black upward facing cubes are then removed, the remaining cubes thrown again and the process repeated. The removed cubes represent radioactive decay and decay curve can be plotted from the results.

This extra sensitive GM-tube has a large window which makes the detector well suited for measuring low activity sources. This provides more counts and thus improves counting statistics for more accurate determinations of half-lives, etc. The GM-tube housing is supplied with a protective cover as well as a protective grid in front of the window. It is sensitive to alpha, beta and gamma radiation. It is complete with a removable protective cap, holder, and integral lead with BNC plug. This GM tube does NOT have built-in anode resistor, and therefore requires counter with built-in anode resistor. Suitable for use with RA67530. • Useful diameter: 28.6 mm • Recommended supply voltage: 500 V • BNC plug

Fitted with a 10 mm diameter mounting rod, so the GM-tube may be held safely in the squat retort base.

A low cost apparatus for the demonstration of Rutherford scattering by means of gravitational analog of inverse square law repulsion. Comprises wooden launching ramp with guiding groove running down its curved front face along its length and index marks at 40, 60, 80 and 100 mm height above the base, that provides pre-determined launching heights. Also included is spun aluminium hill along with 19mm diameter steel ball. The shape of the aluminium hill has been carefully determined by varying its height above the base line by an amount arrived on the basis of the reciprocal of the radius. Ramp Dimensions (L x W x H): 300 x 50 x 105 mm. Hill Dimensions (Dia. x H): 280 x 60mm.

An instrument useful in showing the random nature of radiation, it produces spectacular bright sparks when alpha particles are ionised between the electrically charged circular wire grid and steel electrode. It comes complete with a sliding holder for an alpha radiation source, an accurate scale to measure the effects of distance between the source and the grid and is built in vacuum formed black plastic case. All of the electrical connections from an EHT power supply are through 4 mm insulated sockets. Connections to Timer Scaler and Frequency Meter are via BNC to BNC cable. Requires 5kV EHT power supply and alpha radiation source. Weight: 400g. Dimensions: (L x W x H) 310 x 77 x 85 mm.

A bench for radioactive sources and GM-tubes, providing stable and convenient setup, allowing reproducible results when making experiments with radioactivity. Investigate how the radioactive radiation spreads from the source in both angle and distance or investigate how radiation is absorbed by lead and aluminium. The bench is 60 cm in length, with a millimetre scale. Two riders are included, one for carrying a GM-tube, and the other for carrying the source holder*. The source holder can be fitted with a 6 mm diameter steel rod, for hanging absorber plates in front of the radioactive source. It can be rotated, and is fitted with degree scale ±110° - 1° • Lead plates: 5 x 2 mm thick, and 10 x 1 mm thick (enamelled to protect from lead contamination) • Aluminium plates: 6 x 2 mm thick, and 4 x 0.5 mm thick *Please note: This holder is only suitable for use with Frederiksen radioactive sources, which are available by special request only. The sealed radioactive sources can be used instead, with some limitations, using RA170800 source holder.

A multi-purpose instrument, combining the functions of a multi-purpose timer, ratemeter and frequency meter in one compact unit. It can be used as a simple stopwatch to more sophisticated applications such as dynamics experiments with air tracks etc. The scaler and ratemeter modes allow numerous radioactivity experiments to be undertaken. It has four, 7-segment LED digits 13 mm high. The high brightness and large size display make it ideal for classroom demonstrations. The microprocessor based design minimises the number of controls required and these are clearly labelled so that the instrument is very straightforward to use. The GM tube input is a TNC socket, TNC-to-BNC adaptor is required for connecting GM tube with BNC plug. Timer Four Auto Ranges: 0 to 9.999 s, 10 to 99.99 s, 100 to 999.9 s, 1000 to 9999 s Scaler Three Auto Ranges: 0 to 9.999 1000 counts, 10 to 99.99 1000 counts, 100 to 999.9 1000 counts Accuracy: ±0.01% Sensitivity: 160 mV peak Ratemeter Three Auto Ranges: 0 to 9.999 1000/s, 10 to 99.99 1000/s, 100 to 999.9 1000/s Frequency Meter Three Auto Ranges: 0 to 9.999 kHz, 10 to 99.99kHz, 100 to 999.9 kHz Max Input Signal: 20 rms Max Sensitivity: 250 mV rms Range: 10 Hz to MHz

The electron diffraction tube is highly evacuated tube with an electron gun consisting of pure tungsten heater filament and cylindrical anode all contained in clear glass bulb. The electrons emitted by the heated cathode are constrained to narrow beam by an aperture and are then focussed by means of an electron-optical system. The resulting tight, monochromatic beam then passes through micro-mesh nickel grating situated at the aperture of the gun. Onto this grid, thin layer of polycrystalline graphitised carbon has been deposited by vaporisation. This layer affects the electrons in the beam much like diffraction grating. The result of this diffraction is seen in the form of an image comprising two concentric rings that become visible on the fluorescent screen. spot resulting from the un-deflected electron beam continues to be visible at the centre of the rings. Also requires an EHT power supply. Specifications: • Max. filament voltage: 6.3 V AC • Max. anode voltage: 5 kV • Anode current: approx. 0.1 mA at 4 kV