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Convection In Water Apparatus
Consisting of rectangular glass tubing. Dimensions (W x L x Dia.): 210 x 360 x 22mm.
203.95 AED
Charles Law, Superior, Each
Comprises a capillary tube and thermometer, mounted on a board with a scale behind the capillary tube. The apparatus comes complete with oil in the capillary tube, so no difficult filling with sulfuric acid is required.
The relationship between temperature and volume can be observed easily, and an estimate for absolute zero can be obtained through extrapolation of experimental data.
Also availabler as class set of 10 in a Gratnells case.
184.58 AED
Charles Law, Superior, Pack 10
Comprises a capillary tube and thermometer, mounted on a board with a scale behind the capillary tube. The apparatus comes complete with oil in the capillary tube, so no difficult filling with sulfuric acid is required.
The relationship between temperature and volume can be observed easily, and an estimate for absolute zero can be obtained through extrapolation of experimental data.
Also availabler individually.
1778.63 AED
Boyle's Law
The apparatus comprises reservoir with bourdon gauge, connected to vertical glass tube. The reservoir has a needle valve to control pressure, and a high-quality tyre-type valve for attaching the supplied pump. Air does not escape when the pressure is increased, until the needle valve is opened.
The pressure is displayed on a bourdon gauge, which has a transparent back, allowing students to see the internal workings. Pressures of up to 3.5x atmospheric pressure can be measured, which provides a good range of measurements.
The tube is of strong construction, and is further protected by a plastic safety screen. It has graduations so that the length of the air column can be measured, and is of uniform cross-section, so the volume of air is proportional to the length of the air column.
Unlike traditional Boyle's Law apparatus, this unit has no rustable materials, so water can be used instead of oil, which offers superior results, as well as reduced hazard and mess.
The water is pumped into the tube, and the pressure and volume of air is measured at regular intervals. The inverse relationship between pressure and volume at constant temperature is easily observed.
999.98 AED
Hyman Fire Piston
This apparatus vividly demonstrates the rise in temperature that occurs when a fixed mass of air in a transparent cylinder is compressed by a hand operated piston. A piece of tinder, which is provided, ignites in the transparent cylinder: much as a diesel engine obtains ignition. The cylinder and piston can also be used to demonstrate the effect of decompression, being the immediate lowering of temperature and the consequent condensation of water vapour inside the cylinder the cloud formed can easily be seen.
Cylinder Dimensions: (L) 198.00 mm (OD) 15.00 mm (ID) 9.00 mm
290.11 AED
Jolly's Bulb Metal
This 80 mm diameter hollow metal sphere is connected to manometer (Bourdon) gauge, for demonstrating changes of pressure in closed volume of air when either heated or cooled. Immersing the ball in heated water bath or ice bath allows the relationship between pressure and temperature of the enclosed air to be investigated. The metal sphere is more robust than glass versions and responds to temperature changes little faster.
545.05 AED
Boyle's Law Indicator
This simple low-cost apparatus provides means of demonstrating Boyle's law. It is not 100% accurate but it is adequate for demonstrations giving students literally 'feel' for increase in pressure against volume.
128.06 AED
Liquid Level Apparatus
To show that the level of liquid in connected vessels is constant irrespective of the vessel size or shape. Consists of four different glass vessels connected by common base tube and mounted on base. Dimensions (L x W xH): 230 x 100 x 160mm.
181.82 AED
Displacement Vessel (Eureka)
Hollow metal cylinder with overflow spout. Dimensions (L x Dia.): 100 x 50mm.
45.45 AED
Fluid Pressure Apparatus (Spouting Cylinder)
For demonstrating how pressure increases with depth. Consisting of a metal cylinder with three identical sized outlets at different levels down one side. Dimensions (H x Dia): 400 x 70mm.
157.70 AED
Ball and Ring
Two-piece set. Brass ring and brass ball mounted in wooden handles. Dimensions (L): 260 mm.
52.96 AED
Bimetallic Compound Bar, Premium
An improvement on the riveted version, this bonded copper and steel bimetallic strip comes mounted in a wooden handle for ease of use. Heating on either side causes the strip to bend as the two metals expand by different amounts. Comes with instructions.
Dimensions (L incl. handle): 300mm); Bimetallic Strip (L x W) 200 x 13 mm.
86.56 AED
Rectangular Glass Block
Optical quality rectangular glass block for refractive experiments. Dimensions 114 x 63 x 18 mm (L x W x D).
55.34 AED
Biconcave Lens, Acrylic, 75 x 115 x 10 mm
Biconcave lens, 75 x 115 x 10 mm (L x radius x D)
37.94 AED
Set of 6 Acrylic Blocks
Set of acrylic blocks including OP11810, OP11815, OP11820, OP11825 and OP11830, pluc a triangular prism.
118.58 AED
S-Shape Block
Acrylic block in the form of shallow S-Shape, ideal for demonstrating total internal reflection. Dimensions 220 x 20 x 20 mm.
79.84 AED
Acrylic Block Set
The set contains ten 25 mm-thick optical acrylic prisms:
- Equilateral triangle 75 mm sides
- Equilateral triangle 57 mm sides
- Isosceles 90°- 71 mm hypotenuse
- Scalene 90° - 78 mm hypotenuse
- Rectangle 75 mm x 50 mm
- Semicircular 75 mm
- Biconvex 75 mm
- Biconcave 75 mm
- Plano - convex 75 mm
- Plano - concave 75 mm
498.02 AED
Colour Acetate Filter Sheet Set
Flexible acetate transmission filter material suitable for making slides for colour mixing experiments or any work involving coloured light. Each set contains sheets: Primary Red, Primary Blue, Primary Green, Magenta, Cyan, Yellow and Neutral Density. The neutral density material gives 50% light transmission with no colour change. Dimensions (L x W): 210 x 148 mm.
162.05 AED
Colour Acetate Filters Set
Supplied in A4 sheets in colours red, blue, yellow, green, and orange.
75.49 AED
Colour Mixing Swatch Set
Laminated transparent plastic colour sheets, one each of the primary colours red, blue and green and one each of the secondary colours yellow, cyan and magenta. The sheets are joined at one corner so that different combinations can be overlapped for colour mixing. Dimensions (L x W): 73 x 50 mm.
75.49 AED
Newton's Colour Disc
This Newton's Disc consists of an aluminium plate with coloured segments printed on it. The colours represent the colours of the visible spectrum (red, orange, yellow, green, blue, indigo and violet). When the disc is rotated and the speed increased, the colours start to blur and fuse together and then mix so that the eye, unable to respond rapidly enough, sees this effect as white light. Mounted on base with handle at rear to turn the disc. Weight: 0.8 kg. Dimensions (L x W x H): 250 x 150 x 25 0mm.
175.49 AED
Colour Mixing Box
This unit contains three coloured light sources (red, green and blue) projected onto screen in overlapping circles. The unit is self-contained, meaning no setup is required, and can be used comfortably by 2-3 pupils at time.
The brightness of each light can be controlled independently, allowing any combination of the three. This allows the demonstration of composition of any colour using just the primary colours.
Requires 3 x AA batteries.
167.59 AED
Newton's Colour Wheel, Premium
This motorized Newton's colour wheel is useful for demonstrating that white light is composed of combination of different spectral colours. Comprises a disc with different coloured sectors mounted on low voltage (6V DC) motor box with integral 4 mm sockets. When the disc is rotated at fast enough speed the colours merge to form white (usually off-white). Requires standard variable laboratory power supply (1-6 DC).
282.60 AED
Colour Mixing Apparatus
An upright case contains three, high powered, accurately colour matched LEDs, each of which has infinitely adjustable brightness. Also supplied is a large, free standing, primary colour shadow mask,a hand held secondary colour mask and a 12 V plug top power supply. The system allows the teacher to project large primary and secondary colour mixing disks onto any vertical surface and to adjust the colour saturation to mix virtually any colour (how do you produce brown). Unlike other systems the purity of the resulting white is outstanding. The unit is extremely easy to use, is easily transportable and comes with full instructions. The only other requirements are a white wall and a darkened/blacked out room. The system may be used to demonstrate both secondary and primary colour mixing, colour shadows and colour reflection/absorption.
733.19 AED
Diffraction Grating, 80 lines
Mounted in 50 x 50 mm slide holders. Aperture size 36 x 24 mm. With tough plastic frame. Made in the UK.
129.25 AED
Diffraction Grating, 100 lines
Mounted in 50 x 50 mm slide holders. Aperture size 36 x 24 mm. With tough plastic frame. Made in the UK.
129.25 AED
Diffraction Grating, 300 lines
Mounted in 50 x 50 mm slide holders. Aperture size 36 x 24 mm. With tough plastic frame. Made in the UK.
129.25 AED
Diffraction Grating, 600 lines
Mounted in 50 x 50 mm slide holders. Aperture size 36 x 24 mm. With tough plastic frame. Made in the UK.
169.96 AED
Diffraction Gratings Slide
Set of gratings 96, 300 and 600 lines/mm mounted on single slide with three 16 x 19 mm apertures. Dimensions 90 x 30 mm.
210.27 AED
Diffraction Gratings, Economy, 300/mm
Economy diffraction grating in 50 x 50 mm plastic slide. Aperture 36 x 24 mm. Screen printed on the slide are the lines/mm, and arrows to indicate the direction of the lines and gaps.
70.75 AED
Diffraction Gratings, Economy, 600/mm
Economy diffraction grating in 50 x 50 mm plastic slide. Aperture 36 x 24 mm. Screen printed on the slide are the lines/mm, and arrows to indicate the direction of the lines and gaps.
72.90 AED
Diffraction Gratings, Economy, 1000/mm
Economy diffraction grating in 50 x 50 mm plastic slide. Aperture 36 x 24 mm. Screen printed on the slide are the lines/mm, and arrows to indicate the direction of the lines and gaps.
80.63 AED
Diffraction Glasses
The relationship between light and colour has never been explained so clearly as with these fun glasses. The double-axis diffraction grating embedded in the lenses ensure that, when looking through these glasses, almost any single light source can be split into 3D spectrum of the component colours. Specifically designed to fit students up to to KS3 but will fit older students.
57.71 AED
Red Laser Pointer
A Class II ≤ 1 mW) laser pointer for lectures and demonstrations. Powered by 2 x AAA batteries (Not Supplied). Red laser specification 630 - 680 nm
95.65 AED
Reflection/Refraction Apparatus Kit
This kit comprises a red laser which attaches and rotates around a graduated plate, which makes it easy to see and measure the incident beam angles for both reflected and refracted beams. It can be used in vertical plane with the cylindrical tank with water or in horizontal plane with the glass optical accessories, which are included. Useful to demonstrate: Verification of the Snell's law of refraction with semi-circular block or cylindrical tank; Total or diffuse reflection with plane mirror; 90° reflections in 90° prism; Double refraction with parallel faces; Determination of the angle of prism; Multiple reflections and refractions in trapezoidal prism.
Kit includes;
•1 x Laser (powered by 2 x AA batteries – not included)
•1 x graduated disc 50 mm diameter
•1 x cylindrical tank
•1 x plane mirror
•1 x rectangular block
•1 x right angle prism
•1 x semi-circular lens
•1 x trapezoidal block
1411.04 AED
Red/Green Laser Pointer
This quality combination class II laser pointer has options for both red and green lasers and is ideal for highlighting and presentations or for comparing the properties of red and green laser light. The unit has chrome finish exterior. 2 x AAA batteries required (not included). Red laser specification: 650 nm, <1 mW. Ultra bright green laser specification: 532 nm, <1 mW. BS EN 60825 compliant and labelled.
479.04 AED
Violet Laser Pointer
A class 2 (< 1mW) laser emitting purple/violet light at 405 nm. Great for demonstrating Total Internal Reflection in bottle of tonic water!
261.66 AED
Blue Laser Pointer
Superb class II (≤1 mW) laser pointer emitting true blue laser light, at wavelength of 445 nm. An excellent addition to the laser range for diffraction experiments etc.
610.27 AED
Red/Orange Laser Pointer, 635nm
This class II (≤1 mW) red/orange laser pointer, emitting light at wavelength of 635 nm, provides higher visibility (brighter) light than standard 650 nm red lasers for the same power output.
156.52 AED
Lens Cleaning Tissues, ""Whatman 105""
Lens Cleaning Tissues, ""Whatman 105"", 15 x 10 cm.
43.40 AED
Lens Biconcave, 38 mm, FL 100 mm
Double concave. Optically worked glass with ground edges. Dimensions (Dia.): 38 mm.
11.07 AED
Lens Biconcave, 50 mm, FL 100 mm
Double concave. Optically worked glass with ground edges. Dimensions (Dia.): 50 mm.
14.23 AED
Lens Biconve, 38 mm, FL 100 mm
Double convex. Optically worked glass with ground edges. Dimensions (Dia.): 38 mm.
11.86 AED
Lens Biconve, 50 mm, FL 100 mm
Double convex. Optically worked glass with ground edges. Dimensions (Dia.): 50 mm.
14.23 AED
Cylindrical Lens, Biconvex, FL 75 mm
Clear glass with polished faces and ground edges. Dimensions (H x W): 50 x 45mm.
44.27 AED
Cylindrical Lens, Biconcave, FL 75 mm
Clear glass with polished faces and ground edges. Dimensions (H x W): 50 x 45mm.
43.48 AED
Cylindrical Lens, Planoconvex, FL 75==60 mm
Clear glass with polished faces and ground edges. Dimensions (H x W): 50 x 45mm.
64.03 AED
Mirror, Concave, FL 200 mm
These round, unmounted, optically worked glass mirrors are premium quality, incorporating vacuum coated silver reflective backing with protective coating, for superior finish. Dimensions (Dia.): 50 mm.
15.02 AED
Mirror, Convex, FL 200 mm
These round, unmounted, optically worked glass mirrors are premium quality, incorporating vacuum coated silver reflective backing with protective coating, for superior finish. Dimensions (Dia.): 50 mm.
15.02 AED
Plastic Mirrors, Double-Sided, 100 x 100 mm
Flexible. Can be cut with scissors or sharp knife.
39.53 AED
Mirror on Blocks, 75 x 25 mm
Plane glass mirror, mounted on wooden support block for convenience. Removes the need for separate support block to hold mirror perpendicular to work bench.
10.67 AED
Mirror on Blocks, 100 x 75 mm
Plane glass mirror, mounted on wooden support block for convenience. Removes the need for separate support block to hold mirror perpendicular to work bench.
13.04 AED
Mirror Support Blocks
A pack of 43 mm cube wooden blocks with 4 x 15 mm slot for supporting plane mirrors during optical experiments on reflection.
166.01 AED
Sliding Saddle
For fixing of optical equipment with max. 10 mm diameter fixing rod. Made of black-anodised Aluminium with thumb screw and measuring line.
Suitable for use with the Premium Optical Bench OP66520, and Radioactivity Bench Kit RA95610.
Dimensions (W H L): 35 50 84mm.
233.20 AED
White Screen
In laminated plastic with white surface with 10 mm fixing rod. Dimensions (H x W): 250 x 250 mm.
233.20 AED
Premium Optical Bench Kit
Made from black-anodised aluminium with mm scale. 1m long, cross section 26 x 82 mm. Supplied with adjustable levelling feet with rubber pads, sliding saddles with 10 mm bore fixings to accept accessories, sliding saddle for optical disc and 10 mm hole.
1541.48 AED
Optical Bench Kit, 1 metre
This compact Optical Bench with an LED light source offers excellent support and alignment of the optical elements. Ideal for use where space is at premium or as an economical alternative to full length optical bench, the light source is bright LED which does not get hot and should give thousands of hours use without replacement and, of course, electricity consumption is very low. The lenses and the objects (Ø50 mm) are held tight in the lens holder with ring which can be tightened to ensure precise positioning and prevent risk of damage. Contents include: 1-metre rail, graduated in mm, 1 LED light source on support, 4 sliders, 2 lens holders, 1 white screen, 1 F-letter, set of 3 diaphragms (Ø 3, 5 and 8 mm), 1 set of lenses (F -100, +50, +100, +250).
1037.14 AED
Optical Bench Kit, 2 metre
This full length Optical Bench is more comprehensive version of the 1 metre bench and includes powerful LED light source with adjustable condenser. The LED light source, which does not get hot, should give thousands of hours use without replacement and the electricity consumption is very low. The rail offers excellent support and alignment of the optical elements. The lenses and the objects (Ø 50 mm) are held tight in the lens holder with ring which can be tightened to ensure precise positioning and prevent risk of damage.
Contents include: A 2-metre rail, graduated in mm, 1 LED light source with adjustable condenser and support, 8 sliders/lens holder + 4 lens holders, 1 prism + 1 prism holder, 1 white screen + 1 ground glass screen, 1 F-letter, set of 3 diaphragms (Ø3, 5 and 8 mm), 1 set of lenses (F -100, -50, +50, +100, +200, +500), 1 concave mirror + 1 convex mirror + 1 plane mirror.
1668.60 AED
Compact Optical Bench Kit
An optical bench kit that fits in suitcase! The complete kit, including the bench itself, can be disassembled in seconds, and stored conveniently and safely in its stylish, robust suitcase.
The bench features guide at the rear to ensure the riders are correctly aligned, and cm/mm scale on the front. It comes in three parts which clip together easily to form 1.1 m track.
The riders can take either 10 mm diameter rod, or 2.5 mm thick sheet. They feature pointer so their position can be read from the scale on the bench.
The lens/slide holders can accommodate either a 40 mm diameter optical device such as mirror or lens, or a 50 x 50 mm slide such as diffraction grating or colour filter. The white LED also fits in this holder.
All parts of this kit are available separately.
• 1.1 plastic bench in 3 parts
• White LED with Power Supply
• 5 riders (1 with knearled screw)
• 4 lens/slide holders
• 1 prism table
• 5 circular apertures
(1.5/3/6/10/20 mm)
• 1 single slit
• 1 triple slit
• 1 figure of '1'
• 6 plastic lenses
(focal lengths -100/-200/+50/+100/+150/+250 mm)
• 1 mirror (50x50 mm)
• 1 white screen (100 150 mm)
• Suitcase 320 x 430 x 115 mm
• Weight 1.9 kg
1205.51 AED
Optics Screen
A white acrylic screen mounted in wooden base, suitable for image projection in optics experiments. Dimensions (H x W): 190 x 120 mm.
132.80 AED
Planck's Constant Apparatus
This apparatus is designed to determine the approximate value of Planck's constant, using a range of LEDs of known wavelength, to allow the electron/photon energy to be calculated. There are LEDs, covering the light range from deep blue at 470 nm to near IR at 940 nm, mounted on box with 4 mm sockets for attachment to voltmeter and ammeter for voltage and current measurements. By monitoring the voltage at which each LED just begins to emit light, graph of energy input as function of light emitted frequency can be plotted and an approximate value of Planck's constant can be deduced.
Requires a 9 DC power supply (standard lab power supply).
394.85 AED
Filament Lamp for Optics Experiments
Antique style mains bulbs, useful for optics experiments as the low brightness filament makes useful object for projection of an image, determining focal length etc. They have the added bonus of being an attractive form of mains lighting! Voltage: 230 AC. Power rating: 60 W.
72.90 AED
Pinhole Camera Kit
This pinhole camera class kit contains enough components to make 10 pinhole cameras. The kit includes 10 square section black plastic tubes, 200 x 60 x 60 mm each, pre-cut black card and translucent paper for mounting on either end of the tubes. A small pin-hole in the black card will then project an image onto the translucent paper at the opposite end of the tube. Requires a bright light source (e.g. carbon filament or antique lamp) or desk lamp with suitable object to project an image.
581.02 AED
Polaroid filters, mounted
High quality polaroid filters, sandwiched between glass sheet for rigidity and ease of cleaning, and mounted in 35 mm slide holder frame.
252.17 AED
Polaroid Stress Analyser
The Polaroid stress analyser allows students to view stresses which exist in clear plastic materials. This simple apparatus consists of two crossed Polaroid filter squares (i.e. axes perpendicular to each other), 65 x 65 mm, on a plastic handle. A gap between the Polaroid squares allows clear plastic shapes (or even a clear ruler) to be placed between them, to view any stresses within the material the stresses show as coloured areas and lines within the plastic. The analyser comes with two cut-out shapes which can be compressed to alter the stress patterns. Additional shapes are also available separately (OP74725).
290.11 AED
Polaroid Analyser Samples
A set containing four additional pre-cut shapes and 200 x 200 mm sheet (for cutting your own shapes) for use with the OP74720 Polaroid Stress Analyser.
290.11 AED
Polaroid Squares
Unmounted Polaroid squares suitable for class work on polarised light. 50 x 50 mm.
116.20 AED
Polaroid Squares
Unmounted Polaroid squares suitable for class work on polarised light. 150 x 150 mm.
599.99 AED
Polarimeter
A simple, cost-effective polarimeter suitable for student use. A monochromatic light shines through a polariser at the base of the polarimeter and through a sample tube containing the solution for testing. A second polariser located in the eyepiece is then rotated and the angle of rotation/extinction measured on the integral scale. Requires a standard DC power supply to power the light source.
428.85 AED
Hollow Glass Prism
Hollow glass prism with 50 mm equilateral sides, useful for filling with specific liquids for refraction experiments, such as Ethyl cinnamate (ET2680).
44.27 AED
Ray Box
A ventilated metal lamp house having an open front with extended finned sides and vertical internal grooves. The light source comprises 12 S.B.C. lamp in holder with m of twin flex. Complete with metal plate having single and triple slits, one side matt black, the other white.
Takes 45 mm wide accessories.
109.09 AED
Ray Box Slit Plate, 3 & 1 Narrow Slit
Slit plate, 3 & 1 narrow slit for ray Box OP11808 (slit only)
27.27 AED
Ray Box, Spare Bulb, 12 V, 21 W
12 V 21 W SBC lamp axial filament 48 mm length. Suitable for Ray Box OP11808.
21.34 AED
Optical Kit with 5 Beam Laser Ray Box
This laser optics kit can be used in bright light conditions thanks to the multi-beam red laser light source. The kit comes complete with Plexiglass (Acrylic) optical accessories and the laser is switchable between 1, or beams, which are all parallel to each other. Comes complete with aluminium storage case. Kit components: Laser class II (1 mW): 1, or laser beams Power supply for laser: 6.3 V mains adaptor mat with disc graduated in degrees and rule graduated in mm, 210 x 380 mm, 150 mm diameter graduated disc Flexible mirror (plane, concave or convex) Optical blocks/prisms: rectangular; parallel faced; semi-circular; biconvex; biconcave lens; semi-circular tank; trapezoid.
1369.94 AED
