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We offer the best product range of Kohlrausch Conductivity Bridge, Ray Optics Kit, Maxwells Vibration Needle, Compound Bar and Trolley Accelerator.
Tubular, body made of clear plastic with adjustable zero and top suspension ring and bottom load hook, colour coded
ForSp. Gr. 0.700 to 2.000, all glass, with parallel graduated stem.
This instrument is designed for the direct measurement of resistance of electrolytes etc. The slide wire is circular type with dial calibrated from 0 to 10 ohms. There are six multipliers of 0.1, 1, 10, 100, 1000 and 10000 ohms thus giving a total range of 0.01 to 1, 00, 000 ohms. The bridge is suitable for use on a dry battery. Instead of galvanometer sensitive telephone receiver or headphone can be used. The position of the slider is adjusted to the position of minimum sound in the headphone. The coils are of covered Eureka wire and properly aged. All coils are calibrated on imported testing bridge. Accuracy of coils + 0.1%.
Post Office Box Plug Type : Having three or four pairs of ratio coils of (10, 100, 1000 ohms) and 16 series coils of selected double covered wire enclosed in a teakwood case with Sunmica Top. The blocks are made of brass size 1/2" (Square Rod) nicely golden lacquered and resistance values are engraved on them. The top is manufactured from Bakelite. Two tapping keys are provided for Battery and Galvanometer. All plugs are interchangeable. All coils are calibrated on Imported Testing Bridge Accuracy 0.1%
Resistance Box Dial Type : The dial studs are machine cut from phosphorous bronze and laminated bush contact are made from hardened copper phosphot bronze leaves. The laminated bushed are connected to the main central contact. Individual resistors are mounted separately. The values of resistors are machine engraved or Screen Painted. Technical Details : Double covered Eureka wire is wounded on Bakelite spools. Each resistor is processed for ageing and heat treatment to avoid shifting of the values and tested individually to accuracy after fixing Carbon Resistance. Resistance are calibrated on imported testing Bridge Accuracy +0.1% Single Dial Resistance Boxes
Resistance Box Dial Type : The dial studs are machine cut from phosphorous bronze and laminated bush contact are made from hardened copper phosphot bronze leaves. The laminated bushed are connected to the main central contact. Individual resistors are mounted separately. The values of resistors are machine engraved or Screen Painted. Technical Details : Double covered Eureka wire is wounded on Bakelite spools. Each resistor is processed for ageing and heat treatment to avoid shifting of the values and tested individually to accuracy after fixing Carbon Resistance. Resistance are calibrated
Single Dial Resistance Boxes
Rheostats, Open type Single tube : Rheostats are made with a variety of resistance & current carrying capacity so as to satisfy every need. They are wound with heavely oxodised eurika resistance wire upon a porcelene tube dia 44 mm aprox. The tube is carrying upon bakalite ridder and the heavy duty sliding contact is of the phospor bronze with brass rod. 4 mm socket terminals are fitted, allowing for rheostat or potentiometer connection. Total resistance and maximum current capacity is marked on the slidder. Total
Permanent current loading should not exceed 75% of the marked values.Accuracy : The actual resistance of Rheostat shall be +20% -5% of the rated resistance as per our resistance chart. (as per ISI specification no. IS : 9051 S. No. 10.3)
These are made in single or more dials having condensers joined in parallels Each dial contains ten segment, High grade paper condenser housed in a teak wood case with engraved bakelite top or in Metal case with Screen Printed Top. Single Dial Condenser Box
Potentiometer Single Wire with sunmica or new wood base with bakelite terminals.
Specially developed kit, of components, to enable students perform a number of experiment in ray optics. Students can demonstratively investigate linear propagation of light rays, focusing by cylindrical lenses, focusing of multiple rays showing aberration, law of reflection, refraction in water, prisms etc. etc. The kit comprises of 2 lamps and stands, 1 pair of housing shields, 2 combine single and triple slit plates, 2 multiple slit combs, 2 holders for combs and slits plates, 4 wooden light barriers, 4 piano cylindrical lenses + 7D, 2 piano cylindrical lenses + 10D, 2 piano cylindrical lenses + 17D and 2 piano cylindrical lenses - 7D.
Compass box fitted on polished wooden base made of non-wrapping wood with meter scale alongside its length. Compass box is removable.
Simple type model, it comprises a wooden board 700 x 90 mm (L x W) on four feet, fitted with two steel wires about 0.3mm x 1m (dia x length). At one end of base there are two 50 N spring balances with hooks and at the other end are two wrest pins.
Supplied complete with three bridges, one large to span both wires and two small bridges for individual wires, two steel wires 0.3 mm dia. x 1m long.
This model of evaporator is supplied complete with A.C. non-sparking geared drive unit, support stand fitted with jack arrangement of stainless steel rod for positioning glass assembly, variable speed regulator, thermostatically controlled stainless steel water bath fitted on a jack, double coiled glass condenser with three opening for vacuum and cooling, pear shape evaporating flask capacity 800ml. receiver flask capacity one litre with ball joint, feeding tube and vapor path tube, a complete working unit. All parts are power coated with apoxy / polyster hybrid, textured, Siemens grey finish.
This is good working bench for junior students. It comprisesawooden base boardlllOxll5mm(LxW) with a one meter seaIe divided in mms and figured at cms, is fixed along thefront edge. Supplied complete with following accessoriesmounted on 100 x 50mm bases(a) 2Nos Object and receiving screens(b) INo Plane mirror 150x100 mm mounted on a base.(c) 4Nos Lens holder with V grooves(d) 1 No Needle mounted vertically in a short wooden rod(e) INo Candle Holder Optical centre height of all components is 100 mm.
A pair of these trolleys are used for investigation on momentum velocity, acceleration etc. Both the trolleys are identical and each consists of a two rectangular wooden blocks 300 mm long moving on three low friction wheels. The trolley is fitted with spring loaded" impulse rod. Rod has three positions to provide different impulses which is triggered by a release pin, In the front of each trolley two holes are drilled and fitted with corks. With removable metal pins at each end to enable trolleys to be stacked or to provide anchoring points for accelerating cords.
(a) Trolleys with rubber wheels fitted with ball bearing(b) Trolleys with plastic wheels fitted on bushes
These pulleys block consists of nylon pulley in metal bracket with hooks at both end, in combination of (a) one (b) two(c) three pulleys.Used for heavy working loads.
For determining Young's modulus for a beam of metal when supported at its extremities. Comprising a metal chrome plated bar 1 meter long, resting on the knife edges of 2 heavy table clamps, hanger with knife edge support to rest on the beam with micrometer or spherometer attachment and with electric contacts, but without weights.
It is to demonstrate, curvature introduced by unequal expansion of two different metals. Two different metal Brass and Iron strips riveted together from end to end and fitted with wooden handle.A. 150 x 15 mm (L x W)B. 200 x 25 mm (L x W)C. 300 x 25 mm (L x W)Note : Bars with other different metal combinations can alsobe supplied, on demand.
This kit helps students understand the concept of moments and principle of lever. It comprises of 5 plywood beams 600 x 45 x 3 mm graduated at 38 mm intervals, and with a groove across its centre to locate the fulcurm point. Also supplied with four fulcurms 32x32x64mm and 40 metal blanks 25mm square.
Board 1, 5 x 0.3 meter and thickness 18 mm of wrap resistant wood reinforced with metal angle side rails.
A portable, cup anemometer which gives direct reading of wind speed in either km/hr, or Beaufort scale, m/s or knots. The vertical spindle carries three cups, which rotates on ball bearings and gives digital display.
Comprises of M.S. sheet, 75 x 100 cm, wall mounting. The light box consist of a light source (12V, 24W lamp) producing conversent, divergent, or parallel beam and on other end, a triple aperture system for colour mixing experiments. Supplied with all necessary optical components which are held on the board with magnets and graduated optical disc 30cm dia.
To provide constant accelerating force to dynamics trolley. A pair of metal discs with a tensioning spring mounted on a metal bracket with a handle provides different tensions to the string, providing adjustable but constant force to the trolley.
Its optical system and features are equivalent to those of advanced model making it still able for senior students to do many quantitative experiments. Substantial iron casted base with leveling screws, protected graduated disc 150 mm diameter, fixed to table, double ended single vernier reading to 1 minute of arc attached to telescope. OpticsTelescope : 178 mm focus achromatic objective, 25 mm clear aperture, 8 X Ramsden eye-piece with cross line graticule, rack and pinion focusing. CollimatorMounted on fixed pillar and fitted with achromatic object glass 178 mm focus, 25 mm clear aperture, adjustable precision slit, rack and pinion focusing. Prism table with leveling screw and its height is adjustable, surface marked with parallel lines to facilitate leveling of prism. Supplied complete with prism clamp and grating holder, watch makers eye lens to read vernier and tommy bar without prism and gratings. Supplied in beautifully polished wooden case with lock and key.
Accessories
a) Crown glass prism : Equilateral 38 x 38 x 38 mm or 25 x 25 x25 mm as per requirement; Refractive index 1.52, optically worked.b) Dense flint glass prism : 32 x 32 x 32 mm refractive index 1.62; optically worked.c) Extra Dense flint glass prisms : 32 x 32 x 32 mm; refractive index 1.65; optically worked.d) Polariser & Analyser : Polariser and analyser each of 25 mm aperture mounted to fit on to telescope and collimator.e) Quarter Wave Plate: For sodium light, 20 mm clear aperture, in graduated rotary mount reading to 5 , on a metal stage for use in diffraction grating holder ofspectrometers.f) Plane Mirror : Silvered both sides, to provide a reflecting surface at the prism table, in metal mount to fit diffraction grating holder.g) Gauss Eye Pieceh) Diffraction Grating Replica : 13000 tines persq. inch or 6000 lines per sq. inch or as required.
Good for many quantitative light experiments by students at Junior level, reading to 0.10 (6 minutes of arc) The base combined with the collimator tube support, carries arc rotating telescope arm. The collimator and telescope tubes are one piece casting of light alloy, focusing by friction drive rack and pinion, 170 mm dia circular scale reading 0.10 but 0.050 can be estimated due to larger width of scale, Optics: Telescope : With achromatic object glass of 170 mm, focus, 21 mm clear aperture, 8 X Ramsden eye piece with hair line graticule, helical focusing, fine motion, tangent screw for finer adjustment. Collimator: Mounted on fixed pillar with axial adjustment. Objective 150mm F.L. and 21mm aperture, helical focusing, unilateral adjustable slit 6mm long. Prism Table: fitted with three spring loaded leveling screws and marked lines. Supplied complete with tommy bar, screw driver and grating holder but without prism and gratings. This Spectrometer is normally supplied in strong cardboard box but it can be supplied in wooden box with lock & key on demand.
Clear acrylic plastic blocks 18 mm thick with bottom surfacefinished in white, to show ray tracks and all other surfacesfully polished. The set corn prisesa) Rectangle 75 x 50 mmb) Triangle 90 x 45 x 45 , 75 mm hyp.c) Triangle 60 x 60 x 60 , 57 mm sided) Semi-circular 75 mm diametere) Bi-convex 75 mm long, curved faces, 115 mm radiusf) Bi-convex 75 mm long, curved faces, 145 mm radiusg) Bi-concave 75 mm long, curved faces, 115 mm radiush) Bi-concave 75 mm long, round 145mm radiusi) Triangle 60 , 30 , 90j) Trapezoidal 60 and 45 prism ends.All packed in storage box. (Note: Other size and thickness can also be supplied ondemand)
Box Form, coils are wound with insulated copper wire and in wooden case, fitted with adjustable alloy contact, on/off switch, 2 socket terminals, a pair of pointer electrodes with insulated handles for adjustment of spark gap, operates on 6-12V supply Spark Length (Approx.) a) 10mm b) 25mm c) 50mm d) 75mm
White lamp, 240 V, 15 W in lamp house, mounted on standard 6 mm rod. Supplied with 2 mtrs. of twin flex wire lead.
Having Brass parts and Permanent magnet compass with bakelite, 4 m.m. socket terminals.
Made of non-wrapping wood lacquer finished or painted, permanent markings and graduations having good contrast and visibility, half circle with bold black numerals, provided with handle, graduations 0 to 180 in both directions and figured every 10.
Made of wood, for Internal and External measurements of objects upto 1 meter in size, figured every centimeter, calibrated in half centimeters, reading taken directly via the window in the adjustable caliper arm, length 1.1 meter (approx)
Set of six wooden models, comprising cube, rectangular, cylinder, cone, square pyramid and sphere. Approx size 10cm.
This kit is most versatile as it enable students to perform a wide range of experiments in electromagnetism such as construction of working motors and meters. For 8 students. It comprises eight anisotropic alloy magnets, eight anisotropic ceramic ferrite magnets, four steel magnet yokes, six plotting compasses, four hard board formers for compasses, one bottle iron fillings, four iron filling dispensers, four each double C-cores, clips for C-cores, aluminium rings, split aluminium rings, four each support bases, armature with axle tubes, aluminium axle rods, eight split pins, 16 rivets, one length latex rubber tubing, four each formers for coils, reels cellulose tape/ reels copper wire, four each sheets white pasteboard, plain postcard, reels white cotton, four each C-resistors 100 ohm, 10 ohm, ten flash lamp bulbs, four neon bulbs, eight (MES) bulb holders, wood clamp, wood block.
This is sliding mass single Pan Balance having die cast aluminium base, beautifully painted, 150 mm dia stainless steel pan, three notched weighing beams with center indicating calibrated sliders (sliding masses) to indicate weight at any point on the notched beams, magnetically damped beam for rapid weighing, spring loaded zero adjust compensator. Tare capacity 225 gm. Beams with graduated scales 0-500 g x 100 g, 0-100 g x 10g, 0-10g x 0.1 g. Thus giving a total capacity of 610 gm. Capacity is increased to 2610 gm by hanging supplementary masses (2 x 1000 g, 1 x 500 g) on the ends of beam. Supplied with dust cover. Accessory: (a) Specific gravity attachment with support rod which slides into the underside hole of the base and clampable on edge of a bench for specific gravity measurement.
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It comprises a cast metal bridge mounted on a triangular shaped stand adjustable for height and having a leveling screw with knurled head fitted to one corner. The bridge carries a steel torsion wire stretched across it, one end of which adjustable for torsion wire, by screw. At the centre of the wire a small clamp is fitted which carry light weight metal pointer with an adjustable counter-poise. From the notch near the tip of pointer is suspended a small mass pan with a hook fitted to its underside, to hang either a wire frame or a metal clip carrying a glass microscope slide 75x25x1 mm. The tip of the pointer move over a vertical scale graduated 6 cm subdivided in mm. Supplied complete with wire frame, micro slides clip, six glass microscope slides and spare length of torsion wire.
Cap. 311g sensitivity 0.01g with four beams, each provided with non-removable slider and graduated beams 0 to 200g x 100g, 0 to 100g x 10g, 0 to 10g x 1g and 0 to 1g x 10mg respectively. With zero adjustment and stainless steel pan 90 mm diameter with two pouring spouts and handle. Height of stirrup 175mm. Magnetically damped beam movement ensures rapid weighing. A platform housed in the base can be used for density measurements.
To investigate longitudinal wave motion, pack of tens open wound spiral springs 50 x 15 mm length x diameter which can be attached by means of spring holders in the front or rear of the trolley. Several dynamics trolleys may be jointed end to end for traveling wave demonstration. Supplied in pack of tens.
Approximately equivalent to that of one dynamic trolley Cat-No. (P-1790) with rubber locating pads which helps produce a less cumbersome assembly as it substitutes one Trolley where large number of trolleys stacked together are used.
Glass, unmounted, back silvered with protective coating(a) 50 x 50 mm (b) 75 x 25 mm(c) 75 x 75 mm(d) 100 x 75 mm(e) 150x25 mm(f) 150 x 50 mm (g) 150 x 100 mm
With the help of this kit diffusion of bromine through air or vacuum can be demonstrated. The kit consists of glass diffusion tubes (2nos.), stopcocks with rubber bungs (2 nos), borositicate glass cap tubes (six nos), bored rubber stopper (six nos) short length rubber tubing (12 nos), adopters (2 nos), stopcock brush and tin of vaseline. Without Bromine Capsules.
A steel needle point mounted in a 6 mm rod and provided with a protective ring shield 30 mm dia. Overall length 95 mm.
To fix metal blocks and also it can be safely used in water. Totally enclosed heating element 12V, 65W in cartridge type housing 75 x 12mm, (Length x Diameter).
Steel tape measure, 9.5 mm wide made of tempered or high carbon steel blade phosphated to stand corrosion and rust. In case (case covered with vinyl leatherette) fitted with flush winding handle, metric in mm,
Blade Width: a) 6.25 b) 9.4 c) 12.5 d) 15.6 e) 18.7 f) 22.0 g) 25.0 mm
