Timstar

Pre-bent rigid polypropylene delivery tubes. Unbreakable in normal use ideal substitutes for fragile glass alternatives. Suitable for many types of gas collection experiments. Eight types available. Supplied in pack of 5. The tubes have an i.d. of 4 mm, and an o.d. of 6 mm. ** please note these are not suitable for use at higher temperatures as this will distort the polypropylene.

Pre-bent rigid polypropylene delivery tubes. Unbreakable in normal use ideal substitutes for fragile glass alternatives. Suitable for many types of gas collection experiments. Supplied in pack of 5. The tubes have an i.d. of 4 mm, and an o.d. of 6 mm. please note these are not suitable for use at higher temperatures as this will distort the polypropylene.

Pre-bent rigid polypropylene delivery tubes. Unbreakable in normal use ideal substitutes for fragile glass alternatives. Suitable for many types of gas collection experiments. Supplied in pack of 5. The tubes have an i.d. of 4 mm, and an o.d. of 6 mm. please note these are not suitable for use at higher temperatures as this will distort the polypropylene.

Pre-bent rigid polypropylene delivery tubes. Unbreakable in normal use ideal substitutes for fragile glass alternatives. Suitable for many types of gas collection experiments. Supplied in pack of 5. The tubes have an i.d. of 4 mm, and an o.d. of 6 mm. please note these are not suitable for use at higher temperatures as this will distort the polypropylene.

Pre-bent rigid polypropylene delivery tubes. Unbreakable in normal use ideal substitutes for fragile glass alternatives. Suitable for many types of gas collection experiments. Supplied in pack of 5. The tubes have an i.d. of 4 mm, and an o.d. of 6 mm. please note these are not suitable for use at higher temperatures as this will distort the polypropylene.

Pre-bent rigid polypropylene delivery tubes. Unbreakable in normal use ideal substitutes for fragile glass alternatives. Suitable for many types of gas collection experiments. Supplied in pack of 5. The tubes have an i.d. of 4 mm, and an o.d. of 6 mm. please note these are not suitable for use at higher temperatures as this will distort the polypropylene.

Borosilicate glass, 6 mm o.d.

Borosilicate glass, 6 mm o.d.

Soda glass tubing, 5 mm x 0.5 m.

Soda glass tubing, 6 mm x 0.5 m.

Soda glass tubing, 7 mm x 0.5 m.

Soda glass tubing, 8 mm x 0.5 m.

Soda glass tubing, 22 mm x 0.5 m.

Medium wall (1.0 mm).

Medium wall (1.0 mm).

Medium wall (1.0 mm).

Medium wall (1.0 mm).

Heavy wall (1.5 mm).Supplied in pack of 20.

To BS 2775. Normal wall. *N8 Tubing fits most Bunsen Burners.

To BS 2775. Normal wall. *N8 Tubing fits most Bunsen Burners.

To BS2775. Heavy Wall. To withstand higher pressures, and prevent collapse under vacuum.

To BS2775. Heavy Wall. To withstand higher pressures, and prevent collapse under vacuum.

To BS2775. Heavy Wall. To withstand higher pressures, and prevent collapse under vacuum.

To BS2775. Normal wall. Transparent and non-toxic. Can be sterilised to 125°C.

To BS2775. Normal wall. Transparent and non-toxic. Can be sterilised to 125°C.

To BS2775. Normal wall. Transparent and non-toxic. Can be sterilised to 125°C.

To BS2775. Normal wall. Transparent and non-toxic. Can be sterilised to 125°C.

To BS2775. Normal wall. Transparent and non-toxic. Can be sterilised to 125°C.

To BS2775. Normal wall. Transparent and non-toxic. Can be sterilised to 125°C.

To BS2775. Normal wall. Transparent and non-toxic. Can be sterilised to 125°C.

To BS 2775. Normal wall.

To BS 2775. Normal wall. *N8 Tubing fits most Bunsen Burners.

To BS 2775. Normal wall.

To BS 2775. Normal wall. *N8 Tubing fits most Bunsen Burners.

To BS 2775. Normal wall.

To BS 2775. Normal wall. *N8 Tubing fits most Bunsen Burners.

To BS 2775. Normal wall. *N8 Tubing fits most Bunsen Burners.

To BS 2775. Normal wall. *N8 Tubing fits most Bunsen Burners.

To BS 2775. Normal wall.

To BS 2775. Normal wall. *N8 Tubing fits most Bunsen Burners.

To BS 2775. Normal wall.

To BS 2775. Normal wall. *N8 Tubing fits most Bunsen Burners.

To BS2775. Normal wall. Translucent.

To BS2775. Normal wall. Translucent.

To BS2775. Normal wall. Translucent.

To BS2775. Normal wall. Translucent.

To BS2775. Normal wall. Translucent. *N8 Tubing fits most Bunsen Burners

To BS2775. Normal wall. Translucent. *N8 Tubing fits most Bunsen Burners

Seamless viscose cellulose tubing. Should be stored in resealable polythene bag to retain moisture. • MWCO: 12,000-14,000 daltons • Pore size: 24 ångström (2.4 nm)

Seamless viscose cellulose tubing. Should be stored in resealable polythene bag to retain moisture. • MWCO: 12,000-14,000 daltons • Pore size: 24 ångström (2.4 nm)

Seamless viscose cellulose tubing. Should be stored in resealable polythene bag to retain moisture. • MWCO: 12,000-14,000 daltons • Pore size: 24 ångström (2.4 nm)

Seamless viscose cellulose tubing. Should be stored in resealable polythene bag to retain moisture. • MWCO: 12,000-14,000 daltons • Pore size: 24 ångström (2.4 nm)

Seamless viscose cellulose tubing. Should be stored in resealable polythene bag to retain moisture. • MWCO: 12,000-14,000 daltons • Pore size: 24 ångström (2.4 nm)

Seamless viscose cellulose tubing. Should be stored in resealable polythene bag to retain moisture. • MWCO: 12,000-14,000 daltons • Pore size: 24 ångström (2.4 nm)

Seamless viscose cellulose tubing. Should be stored in resealable polythene bag to retain moisture. • MWCO: 12,000-14,000 daltons • Pore size: 24 ångström (2.4 nm)

Gripping width 44 mm. Pack of 10.

Glass with ground edges.

Glass with ground edges.

Borosilicate glass.

Borosilicate glass.

Borosilicate glass.

Polystyrene disposable weighing boats. Can be shaped to form pouring funnel.

Polystyrene disposable weighing boats. Can be shaped to form pouring funnel.

Polystyrene disposable weighing boats. Can be shaped to form pouring funnel.

Polypropylene weighing bottle, 50 mL.

Pyrex weighing funnel, 10 mL.

Raised centre, one end flat and one end scoop, stainless steel. Length 140 mm.

A small, low-priced, battery-powered stereo microscope with LED illumination, simple design and fixed 20x magnification. The microscope has sharp optics and 55-75 mm interpupillary adjustment. The small size and weight make this stereo microscope suitable for use in the field, for viewing insects, leaves, flowers, rocks, pond life etc. Complete with dust cover. • Magnification: 20x • Objectives: 2x • Field of vision: 20 mm diameter • Eyepieces: 10x, wide-field • Dimensions: 23 10 13.5 cm • Illumination: LED (top light) • Power supply: x AA batteries (not included) • Weight: 585g

Basic microscope eyepiece camera with 2 MP resolution, which connects to PC via the inbuilt USB 2.0 cable. Works with both monocular and binocular microscopes by replacing the eyepiece. Fits eyepiece tubes with diameter of 23 mm or 30 mm (adapter included). Comes with software for Windows PCs. Software download: timstar.co/MI170800-driver • MP still resolution • 640 480 live resolution

Eyepiece graticule with 10mm Horizontal Micrometer Scale subdivided into 100 divisions of 0.1mm (100µm).

Stage micrometer with 10 mm scale, subdivided into 100 divisions of 0.1 mm (100µm). Mounted on a black, anodised aluminium slide 76 x 25 x 1.5 mm. Suitable for all microscopes.

Stage micrometer with 1 mm scale, subdivided into 100 divisions of 0.01 mm. Mounted on a black, anodised aluminium slide 76 x 25 x 1.5 mm. Suitable for all microscopes.

The micrometer scale is disc mounted on black glass slide. Suitable for all microscopes. Slide comes with scales: 10 mm x 0.1 mm and 1 mm 0.01 mm. Dimensions: 75 x 25 mm.

An economical but good quality glass stage micrometer slide, with 1.0 mm long x 0.01 mm scale marked on the glass.

An economical but good quality glass stage micrometer slide, with 1.0 mm long x 0.01 mm scale marked on the glass.

Complete micrometer eyepiece WF 10X/18 mm with 100 divisions in 10 mm and crosshair. Suitable for all Motic Microscopes. Diameter: 18 mm.

2 strips of 5 images, each image has a 10mm scale in 0.1mm (100µm) divisions and circular cut guides for 16mm, 19mm, 21mm and 24mm. Printed on plastic film.

The C-chip™ is an easy-to-use, precision disposable plastic haemocytometer, developed to solve the problem of conventional glass haemocytometers. Supplied individually packed, in a box of 50 slides, these Neubauer Improved type haemocytometers have 0.1 mm 0.05 mm grids, for counting blood cells (erythrocytes, leukocytes), mammalian cells etc. Supplied as box of 50 double chamber slides (100 tests). Features and benefits: • No need to coverslip • No need to wash for reuse • No more contact to hazardous materials • Accurate, reliable and repeatable • Bright grid pattern • tests per slide • Pack of 50 double chamber slides (= 100 tests) • Quartz grade optical plastic • Sturdy and strong Main applications: • Blood analysis • Cell culture; cell concentration measurement and cell viability counts • Microbiology; bacterial and fungal spores Dimensions: 25 75 1.6 mm (w l t) Chamber depth: 100 µm Chamber volume 10 µL

These Bright-Line (Rhodium coated) glass Haemacytometers are designed for accurate counting of cells in blood or other fluids, with one-piece glass construction, an H-shaped moat to form two counting areas (plateaus) and ""V"" slash at the loading side of each plateau. Each plateau features enhanced Neubauer rulings, the ruled surface being 0.1 mm below the cover glass, limiting the volume of blood or fluid over square mm to 0.1 cu.mm and over each of 400 squares (within the central square mm) to 0.00025 cu. mm. Contact of the flat, polished cover glass surfaces with cover glass supports produces an exact volume of fluid over the counting area. The difference in surface tension characteristics between the metallic surface on the chamber and the polished cover glass assures smooth capillarity for precise loading and more even cell distribution. Supplied as double chamber with two cover glasses or kit which includes double counting chamber, cover glasses and red and white pipettes, all in protective case. Spare/replacement glass cover glasses are also available, as pack of 2. • Bright Line (Rhodium coated) counting chamber • Improved Neubauer ruling pattern • Cell Depth: 0.100 mm ±2 • Volume: 0.1 µL To clean the counting chamber after use: remove the cover glass and clean with water or mild cleaning solution (e.g. 10% bleach solution). Dry the counting chamber with soft cloth/wipe, or rinse with acetone.

A mains operated ultraviolet light source ideally suited to demonstration use. Comes complete with on/off switch. The tube is 450 mm long and is housed in powder coated steel with back reflector. Suitable for showing the fluorescing properties of chemicals (eg. washing powder) and for work in the new Forensic Science part of the syllabus. Emits UVA light.

The MP-100 measures the melting point of chemicals from ambient to 250°C. Samples need to be placed in a sealed end capillary tube and located in the heating block. Up to three tubes can be tested at one time. The heating rate can be adjusted manually between 1 to 20°C/min, and for rapid heating 10°C/min, to obtain an accurate melting point range. The sample and melt process can be viewed via the magnifying lens, which is illuminated by bright LEDs. Record the melt temperatures from the thermometer, positioned horizontal to the samples to allow simultaneous viewing. The lens can be detached for cleaning and simple to follow instructions are printed directly on to the unit, making it easy for students to use. For 220/240V. Dimensions (L x W x H): 370 x 140 x 110 mm.

Spare thermometer, spirit filled, to 250 °C.

Designed with safety and ease of operation in mind making it ideal for use in education. Two samples can be tested simultaneously. Built-in illumination and viewing magnifying lens give clear viewing of samples. •Temperature range: Ambient to 300°C. •Three digit LED display. •Range rates: 20°C/min to plateau and 2°C/min to melt. •For 220/240V. •Dimensions (L x W x H): 160 x 220 x 170 mm.

A glass apparatus with side tube to allow stirring by convection of heating liquid. Dimensions: 182 x 84 mm. I.D. 16 mm.

Designed with safety and ease of operation in mind making it ideal for use in education. Two samples can be tested simultaneously. Built-in illumination and viewing magnifying lens give clear viewing of samples. Temperature range: Ambient to 300°C. Three digit LED display. Resolution is to 0.1°C and temperature to melt is variable from 1-10°C. For 220/240 V. Dimensions (L x W x H): 160 x 220 x 170mm.

An aluminium block with an angled hole drilled to accept thermometer (not included). Dimensions (Diameter x H): 65 x 50 mm.

Soda Glass. Outside diameter 1.8-2.0 mm. Wall thickness 0.28-0.32 mm. In packs of 100.

Soda Glass. Outside diameter 1.8-2.0 mm. Wall thickness 0.28-0.32 mm. In packs of 100.

The SDS5032E is a general purpose 2 channel digital oscilloscope with large 200 mm colour display, making it ideal for education and industrial environments. Complete with USB output to PC. Specifications and Features: • Bandwidth: 30 MHz • Sample Rate (real time): 250 MSa/s (125 MSa/s per channel) • Memory depth: 10 KB • Maths functions: Add, subtract, multiply, division and FFT • 20 automatic measurements • Auto-scale function • Standard interface: USB, USB flash drive, LAN, VGA • Bandwidth: 30 MHz • Waveform storage: 15 waveforms • Vertical Sensitivity: 5 mV/div~10 V/div (at input) • Vertical resolution: 8 bit • Trigger Type: Edge, Pulse, Video, Slope • Trigger Mode: Auto, Normal, Single

The Spider power supply has been specifically designed for primary, middle and lower secondary school use. Offering 1.5, 3, 4.5 or 6 V smoothed and regulated DC at up to 1 A, it is the ideal next step from using cells and batteries. Four sets of terminals mean it can be used by four groups simultaneously enabling children to connect a multitude of low voltage electrical devices with the spider's bright LED's acting as power output monitors. •Manufactured in the UK •No batteries needed •4 x 4 mm output terminals •Compact and safe design •Fun to use

A compact power supply offering 2, 4, 6, 8, 10, and 12 V at currents of up to 5 A. Both DC and AC outputs may be used simultaneously up to the rated output. The output is protected by a push button cut-out. The unit is 2 A fused on the back panel and comes complete with a moulded mains lead and plug. 4 units are designed to fit in a shallow Gratnell tray. Specification •Input Supply voltage 230 V DC •Supply frequency 50 Hz •Mains fuse Rear panel 2 A, 20 mm quick blow Mains plug 3 A •Output Voltage 2, 4, 6, 8, 10, 12 V AC nominal 1, 3, 5, 7, 9, 11 V full wave rectified DC nominal •Maximum output current 5 A AC or DC •Manufactured in the UK

The Powerlock power supply has both lockable AC and DC outputs ranges by a simple key making it impossible for students to change the voltage. The Powerlock offers 2, 4, 6, 8, 10 and 12 V in both DC and AC. Outputs may also be used simultaneously up to the rated output required. For safety, the output is also protected by a simple push button cut-out. Supplied with 2 keys. •Output voltages AC & DC •2, 4, 6, 8, 10, 12 V range in AC and DC •Current 5 A •Voltage type - Stepped •Output type - Full wave rectified, non-regulated •Push button trip reset •Mains input 230/240 V AC, 50 Hz •Supplied with mains plug and lead •Manufactured in the UK

The Powerbase is ideal for use in physics, biology and chemistry experiments in secondary and sixth form schools. It comes with a sturdy, powder-coated steel case with fold flat carry handle making it easily stackable. A very popular power supply that has proven to last the rigours of daily use within schools with its tough construction and tamper proof fixings. •0-15 V AC and 0-20 V smoothed DC at up to 8 A •Combined Continuously variable output •Maximum voltage lock push button reset •Short circuit protection •Tough steel powder coated casing •Heavy-duty screw-in rubber feet •Stackable •Supplied with power lead •Designed and manufactured in the UK •5 Year Warranty

A highly versatile power supply for all low-voltage experiments, with continuous voltage adjustment, separate for DC and AC. The two outputs can be loaded simultaneously without interference. Four digital displays show DC and AC voltage and current. The continuously adjustable DC current limiter can be set using a screwdriver. There is an LED indicator to show when the selected maximum current is reached. The power supply also features electronic overload protection. Specifications DC Output voltage: 0-24 V (stabilised) Ripple and noise (max): 25 mVpp Output current (max): 10 A (0-12 V) Max output current falls linearly to 6 A at 24 V Electronic, continuously adjustable current limiter, adjusted with screwdriver AC Output voltage: 0-24 V (stabilised sine) Output current (max): 6 A Electronic current limiter

The perfect choice for experiments with, for example, electron beam tubes requiring voltages up to 500 V DC at a low current level. The unit also provides two auxiliary outputs: A continuously variable negative voltage (down to -50 V DC), series connected with the 500 V output, and a stepwise selectable AC voltage with galvanic isolation from the DC outputs. Continuous adjustment of the -50 V and 500 V voltages. The current is limited to 50 mA. Voltage and current can be read from separate displays. A switch selects which output to monitor. The AC output delivers up to 3 A and is provided with a thermo fuse. Note: Not recommended for students due to high output current. Specifications Negative DC voltage: 0 to -50 V Current (max): 50 mA Positive DC voltage: 0 to +500 V Current (max): 50 mA Ripple: less than 0.1% Regulation: Better than 1 % for variations in mains voltage and load up to 10 %. AC Voltage: 2 to 7 V (1 V steps) Current (max): 3 A

This power supply delivers stabilised DC voltage, continuously adjustable between 0 and 6 kV. For safety, the current is limited by a built-in series resistance. The short-circuit current is 2 mA max. Under load, the voltmeter shows the actual supplied voltage. The power supply is also capable of delivering 6.3 V (max. 3 A) AC. This is the standard voltage for many electron tubes etc. On the front, you find a yellow/green ground socket, connected to the metal enclosure and hence (through the mains wire) to earth. The high voltage section floats relative to ground, allowing either the black (negative) socket or the red (positive) socket to be connected to ground, resulting in a voltage range of 0 to +6 kV resp. 0 to -6 kV relative to ground. Specifications •DC Voltage: 0 - 6 kV. Stabilised, continuously adjustable •Short-circuit current (max): 2 mA •Ripple and noise (max): 1% (RMS, 100 V - 6 kV) •Read-out precision: 1% + 1 digit •AC Voltage: 6.3 V •Current (max): 3 A

This power supply delivers stabilised DC, continuously adjustable from 0 to 12 V. It also supplies AC, selectable between 2, 4, 6 and 12 V. The AC voltage is not stabilised. Both outputs have overload protection. The DC channel is electronically protected and automatically reconnects while the AC channel has a circuit breaker which must be manually reconnected if it trips. Specifications •DC Output voltage: 0 - 12 V (stabilised) •Ripple and noise (max.): 100 mV •Output current (max.): 3 A •AC Output voltage: 2, 4, 6, 12 V •Output current (max.): 3 A

A simple, robust and reliable power supply, ideal for basic electricity experiments. It offers stepped adjustment of both AC and DC with 1 V between the steps. The DC voltage is not smoothed or stabilised, meaning there is a fluctuation of approx. 10% of the output voltage at step level. The unit is protected against overload with an automatic circuit breaker (the unit works again after about 10 seconds). DC voltage: 1 to 12 in 1 V steps Current: 6 A max AC voltage: 1 to 12 in 1 V steps Current: 6 A max

This has to be the best signal/function generator available for educational use! Developed in conjunction with physics teachers and designed specifically for education, this unit provides all the functionality you need for physics teaching. really useful feature for those less familiar with using signal generators is that for basic use, you just operate two buttons: One for frequency and one for amplitude that's it! There is, of course, far more sophistication for those who require it. If you want to change waveform or to utilise the step and sweep modes, the display keeps you updated on the status of the generator. Unique frequency control: The frequency is set by speed sensitive button. Turn slowly to set the display's last digit, turn faster and the response accelerates designed to work intuitively in practical experiments. Drives speakers, vibration generator etc. directly: The built-in 10 power amplifier effortlessly drives power appliances e.g. vibration generator. The amplifier can deliver more than amp for all frequencies between 0.001 Hz and 100 kHz. Step mode: In many applications you need to study physical system at fundamental frequency and at different multiples of that frequency. The special step feature makes this task incredibly easy. Once the fundamental frequency has been determined (e.g. of spring connected to vibration generator), other harmonics (or overtones) can be demonstrated by simply pressing button, which changes the frequency to progressive multiples of the fundamental frequency. Sweep mode: The generator can sweep through frequency range in order to discover eventual resonances. You decide the frequency range and the speed. You have the choice between linear sweep (fixed number of Hz per unit time) and logarithmic sweep (fixed number of octaves per unit time). Advanced Features: The generator connects to your PC through standard USB cable and acts as USB flash drive. Custom defined waveforms (e.g. created by means of spreadsheet) can be saved to the generator. Sequences of settings can be programmed for automatic execution.

A high-quality simple-to-use student signal generator with a range of applications. Operated with just three buttons: Waveform, Frequency and Amplitude. There is a single output, provided with 4 mm safety sockets. The output can easily drive a speaker or vibrator with ample amplitude for resonance and diffraction experiments. The frequency range extends well beyond the audible range. The lowest frequencies are suitable for ""slow motion AC"" experiments. Unique frequency control The frequency is set with a speed-sensitive button. If you turn slowly, the last digit of the display is set. Turning faster, the response accelerates smoothly. The generator covers the six decades from 0.05 Hz to 50.00 kHz in a single range. The frequency is stable within 0.005 % Three waveforms The generator provides sine, triangle, or square wave signals. Distortion of the sine wave is less than 0.25 % in the audible range (20 Hz - 20 kHz) and remains below 1 % throughout the frequency range (0.05 Hz - 50 kHz). Built-in power amplifier The signal amplitude is continuously adjustable from 0 V to a peak voltage of 7.5 V (15 V p-p; 5.3 V RMS). More than 1 A peak current can be supplied. The output is overload protected. Supplied with 12 V power adapter.