Kohlrausch Conductivity Bridge

For direct measurement for electrolytic resistance. Comprising a calibrated scale 0.01- 10 ohms and multiplier ratio dial giving 6 ratios 0.1, 1, 10, 100, 1000 and 10000. It is useful for quick determination of resistance too when galvanometer replaces the headphone in the detector circuit. With circular scale, accuracy ±0.1%.

SG-072 DE-Sauty's Bridge

For Comparison of capacities of condensers. It consists an AC source, a detector, 5 unknown values. Circuit diagram is printed on board and 2 ratio dials of X10 & X100 are provided. Accuracy ±0.05% to ±0.1%

SG-073 Callender and Griffth's Bridge

Callender and Griffith's Bridge Carry foster bridge and potentiometer combined in one instrument. 50cm long slide wire of 1ohms resistance is calibrated into 100 equal parts.

Platinum Resistance Thermometer

Consisting of heat-treated winding of the purest form of platinum having resistance of 2.8 ohms, enclosed in a borosilicate glass grounded tube, provided with four terminals, two for non- inductive winding and two for compensating leads,

Reyleigh's Bridge

For measurement of self-inductance of a coil, provided with ratio arm resistance arm, slide wire and special double key, ±0.05 to ±0.1%

Anderson Bridge

Used to measure inductance of a coil, provided with three resistance arm, one inductance and one capacitance.

Portable Wheatstone Bridge

It is fully portable with build in Galvanometer and battery, designed to provide an accurate and sensitive measurement to resistance and locking faults in cables by adopting the Murray and Varley loop circuit for tests. Separate terminals for current, battery and galvanometer are provided on bakelite panel.

Kelvin Double Bridge

For precise measurement for low resistance, capable of measuring resistance from 0.1 micro-ohm to 1.1 ohms. Ten standard resistances of manganin are provided in steps of 0.01 ohm each in dial form wire five multiple ratios of 0.001, 0.01, 0.1, 1 and 10 ohms.

Digital Multimeter

Workable on 9-volt battery, Provided with lest leads.

Stewart & Gee's Apparatus

To determine the variation of magnetic field along the axis of a coils, a circular non-magnetic frame has copper wire wound on it.

Ballistic Galvanometer

Housed in bakelite body foe measurement of small quantities of electrical change, deflection closely proportional to the electric charge, robust & rigid in construction, easy to operate, provided with zero adjustable & locking devices. Time period 10-12 seconds.

Tangent Galvanometer

The whole assembly rotates a non-magnetic tripod base with non-magnetic leveling screw. Compass box is mounted on non-magnetic metalic cup & is free to rotate around it. Available in: Aluminum, Brass & Wooden Parts.

Spot Reflecting Galvanometer

Highly sensitive instrument to be used as null detector in wheatstone bridge & potentiometer experiments.

Lamp & Scale Outfit

Suitable for use with ballistic galvanometer, provided with +-volt step sown transformer, 6V/20W lamp housed in metal container, a translucent Perspex scale attachment gratuated in 25-0-25 or 0-50 cm, plug & cord.

PNP Transistor

Fitted on board with banana socket & circuit diagram.

Resistance in Series & Parallel Kit

It consists of two circuit boards, one rheostat, one ammeter (MR-80) & patch cords.

Triode Characteristic Apparatus

With build-in stabilized power supply workable on 230 volts AC, fitted with Triode valve on front panel, with two moving coil meters.

PN Junction Diode Characteristic Apparatus

To study Forward & Reverse Characteristics of PN Junction Diode. Instrument comprises of two DC Regulated Power Supplies 0-  3VDC/150mA  &  0-30 VDC/150mA,  two dual range round meters for voltage & current measurement,  PN Junction Diodes mounted behind the panel,  connections of Supplies,  Meters  &  Diodes brought out at 4 mm Sockets.

NPN Transistor

Fitted on board with banana socket & circuit diagram

Diode Characteristic Apparatus

With build-in stabilized power supply & two moving coil meters, fitted with diode valve on front panel. Consists of High Voltage.

Zener Diode Characteristic Apparatus

With build-in stabilized power supply & two moving coil meter 15V & 100mA.

Thomson Method Magnet Method

With build-in power supply to operate cathode ray tube, one voltmeter shows deflection voltage, C.R.T. Is mounted on teak is provided to hold bar magnets & deflection magnetometer.

Millikan's Oil Drop Apparatus

It consists of a condenser, a light source & a measuring microscope all mounted on a comment platform. A strong pillar mounted on a heavy base carries microscope & lamp house. An oil container with a pump is provided at the top of the pillar & oil drops pass through a hole in the plate (placed just below the oil container)

Long Solenoid/Method

Kit Comprises of high voltage power supply unit with intensity, focus X & Y, deflection solenoid current controls, two meters are provided for acceleration voltage control & for solenoid current control, solenoid unit comprises of one solenoid mounted on wooden stand & 3" cathode ray tube is kept in the solenoid pipe.

Hartley Oscillator

To study frequency & waveshope generated by Hartley Oscillator, instrument comprises of 30V DC regulated power supply.

Fet Volt-Ohm Meter Solid State

(VTVM) triple range, fitted with deluxe meter with transparent cover, input impendence 11 megohms.

Energy Band Gap of PN Junction Diode

To plot reverse saturation current Vs temperature in reverse biased PN junction diode, instrument comprises of DC regulated power supply 0-20 volt

150mA two moving coil meters 20V & 100uA for voltage & current measurement, one PN junction diode (ge type) kept in oven with temperature control knob.

BH CURVE APPARATUS

To trace hysteresis curves on CRO using  resistance,  capacitance  & inductance,  instrument comprises of AC power supply 3 15V, output selectable using band switch. 

THERMISTOR CHARACTERISTIC APPARATUS

With  build-in  stabilized  power supply,  workable on 230 volts AC, a thermistor fitted  with build-in oven and thermometer is  mounted on front panel. 

STUDY OF OPERATIONS AMPLIFIER ADDER, SUBSTRACTER, INTEGRATOR AND DIFFERENTIATOR

Instrument comprises of DC regulated  power supplies of 0-5 Volt and ±15 volt, one digital meter to measure  input  and  combination  output  of  voltages,  remittances,  capacitors mounted on front panel. 

SOLAR CELL CHARACTERISTICS APP.

To draw V characteristics of solar  cell, instrument comprises of  moving coil meters fitted on  panel with power supply, lamp  house, solar cell mounted  supplied with wooden plank.  

VERIFICATION OF KCL AND KVL

Instrument comprises of DC  regular  power  supply  0-3  V/250mA, two moving coil meters  5V, 250mA for voltage & current  measurement, combination of  resistance mounted on front panel. 

DIELECTRIC CONSTANT APPARATUS

To calculate dielectric constant of  solid. The instrument consists of  high  frequency oscillator of  tunable frequency, optimum  tunning of oscillator between  parallel  plates,  change is  detected on difference is noted  for calculation. 

RESISTIVITY OF SEMICONDUCTORS BY FOUR PROBE METHOD

The experiment consists of the following :   i) Four Probe Arrangement  ii) Oven (up to 200-C)  iii) Sample: Ge Crystal mounted  iv) Thermometer (0-200-C)  

MICROPROCESSOR TRAINING KIT

Kit is based on 8085 microprocessor and  is  designed to provided ease in  interaction with 8-bit microprocessor  capabilities.  This kit can be used to train engineers  about the microprocessor technology to  control and industrial process and to  develop software for this system. 

G.M. COUNTER DIGITAL

Instrument consists of power supply for G.M. Tube with digital read out  meter. 6 digit counting system with its power supply. Controls for reset,  start and stop fixed on panel. One presentable time with 3-digit display  and thumb wheel switch. Complete with G.M. Tube stand, and one  radioactive source.  

SPECTROMETER

A basic instrument for  performing  spectroscopy  experiments, designed to give  best possible results, mounted  on stable cost iron base,  protracted scale 150mm is  divided on precision machine,  vernier  reading  1  min.,  Telescope is fitted with 25mm dia.

NEWTON’S RING MICROSCOPE

Compact with all the necessary  arrangements for conducting  newton’s Ring experiment, a  standard microscope unit with  30x magnification and rotatable  cross line.  

SIX POSITION VERNIER MICROSCOPE

Consisting of cost iron heavy  base accurately machined with  travelling  carriage  top,  microscope is fitted with 10X  on  Ramsden’s eye and achromatic  objective of 75mm working  distance. 

TRAVELLING MICROSCOPE

Sliding carriage is fitted on the  top carriage which moves at  right angle to the horizontal  motion by means of rack &  pinion, for certain experiment  like Newton Ring and group  reading this microscope is very   convenient to use. Supplied  plywood box.  

MICHELSON INTERFEROMETER

It is divided in two parts: (I) Mechanical  a. Bed: It is optically ground and stable.  b. Lead Screw: it is also optically ground  with 200mm length and 1mm pitch.  c. Optical Mirror Mount: Kinematic mirror  mounts are provided to hold the mirror.  (II) Optical Part:  a. Beam splitter: It is optically work with  10 surface flatness

SEXTANT STANDARD

Designed to give maximum accuracy with 160  mm stainless steel scale divided to 130°,  vernier reading 12 seconds.  

READING TELESCOPE

One meter to infinity provided with 10X  Ramsden eye piece with cross wire,  achromatic objective. Focusing with rack  & pinion, height of telescope is adjustable,  fitted on cast iron base.  

BIPRISM ASSEMBLY

To demonstrate the phenomenon of interference light using  bi- prism and to understand the concept of interference  images- formation and width of fringes. 

ASTRONOMICAL TELESCOPE

A telescope for school students  for general purpose use. The  telescope is mounted on a pillar  having universal motion. The  whole assembly is fitted on Duco  painted metal stand of 4 feet  adjustable height. The telescope  is packed in velvet box.  

RAY OPTICS KIT

An ideal instrument to demonstrate  basic principles of light like reflection,  refraction, deviation of light through  prism  or  accessories.  slab,  with  standard accessories.

NODAL SLIDE ASSEMBLY

It consists of a 1½ meter long stainless-steel double rod optical bench with the  following accessories.  (a) Lamp house  (b) Metal screen white with cross slit:  (c) Plane true tiltable mounted mirror.  (d) Lens assembly consisting of combination of  single & double lens holder.  

HE-NE LASER ASSEMBLY WITH OPTICAL BENCH

For demonstration of interference,  diffraction and holography. Laser  source and switch mode power  supply are housed in a thick  aluminum box with a hole through  which laser beam comes out. The  laser unit is mounted on a precision  1-meter double rod SS optical bench.  Intensity of laser beam is 2mW and it  is red in color.  

INCLINED PLANE 3”

Fitted with glass plate and  clamping arrangement to change  angle, provided with frictionless  pully, metal roller, scale-pan and  graduated arc.  

INERTIA TABLE

An aluminum disc of 150mm Dia,  accurately turned, supports three  or more masses fitted into a  groove concentric with the  circumference, fitted with chunk  & mirror, supported by steel C.P.  Rods, fitted on a heavy base with  levelling screws. 

COMPOUND BAR PENDULUM

To study variation of time with  length  for  a  compound  pendulum. Complete with power  coated wall bracket. 

KATER’S REVERSIBLE PENDULUM

Consists of steel C.P. Rod one meter long,  two adjustable knife edges facing each  other, two cast iron weight are provided to  slide along the length of the bar and can be  clamped in any position. 

INERTIA APPARATUS (NEWTON’S FIRST LAW)

All metal big size export quality, packed in card box.  

‘g’ BY FREE FALL

To determine the value of ‘G’. It consists of an  electronic unit having four sockets and a  switch to help hold or release the ball. A heavy  retort stand carries a solenoid. When toggle  switch is on catch position, current flows  through solenoid producing a magnetic field  and holding the ball. 

BIFILAR PENDULUM

To find the moment of inertia of given mass of  rectangular cross section. It consists of heavy cost  iron rectangular plate having 6 holes. 

TORSION PENDULUM

A carefully turned brass disc  125mm Dia 12mm thickness is  provided with split chuck in the  center.  

MAXWELL’S VIBRATION NEEDLE

Brass C.P. For experiments on  rigidity. It consists of a hollow  cylindrical brass tube open at  both ends with a chuck carrying  a mirror.  

TORSION APPARATUS SEARLE'S HORIZONTAL PATTERN

Consists of two cast iron feet, two supporting rods, one wheel  with groove moving on ball bearings is provided with chunk  to hold the test tube, aluminum scales with pointed are  attached to specimen rod.  

YOUNG’S MODULUS APPARATUS (SEARLE’S)

To determine young’s modulus  of a wire. It consists of two  rectangular frames connected by  a link. The frames are fitted with  self-centering chucks, provided  

PARALLELOGRAM OF FORCE APPARATUS

Board covered with sunmica on  both sides, three sets of 50gm  x iron slotted weight & two  special export quality pulleys. 

SEARLE’S RIGIDITY APPARATUS

To find the modulus of rigidity & young’s  modulus for a wire. The 30cm long wire  under test is connected to two brass rods  30cm long.  

TORSION APPARATUS SEARLE’S (VERTICAL PATTERN) BARTON’S APPARATUS

It consists of a mild steel frame mounted on a heavy  cast iron base fitted with levelling screws, three sliding  circular scales graduated in degrees are provided which  can be clamped at any position. 

BENDING OF BEAM APPARATUS

Comprising a metal bar one meter long resting on  knife edges of two heavy table clamps, hanger with  knife edges moves on metal bar, spherometer fitted  on cast iron stand with electric contacts is also 

PARALLELOGRAM OF FORCE APPARATUS

Board covered with sunmica on  both sides, three sets of 50gm  x iron slotted weight & two  special export quality pulleys. 

PARALLELOGRAM OF FORCES APPARATUS

For verifying the relation between forces  acting at a point, provided with two clamp  type pulleys for mounting at any position.  

K CONSTANT APPARATUS SPRING CONSTANT APPARATUS

Provided with half meter scale, spring with pointer and  slotted weights, fitted on nicely painted iron base.  

HOOK’S LAW APPARATUS

Fitted on stand with 6” meter scale and   hanger.  

ANEROID BAROMETER

Demonstration type. The aneroid  movement with dial is mounted  vertically inside a transparent case.

BOYLE’S LAW APPARATUS

Two glass tubes one closed at  the top and other open are help  in clamps which can be locked at  any position, clamps can slide on  two steel C.P. Rods, wooden  plank carrying a meter scale is  mounted on heavy cast iron base  with levelling screws.

RAIN GAUGE APPARATUS

A non-rusting metal vessel having a funnel  approx. 4” Dia fitted on top of a cylindrical  container of same diameter, provided with  polythene measure. 

ARCHIMEDES PRINCIPLE APPARATUS

It consists of an 8x7” base and a rod, spring  balance with clamp, plastic measurement  cylinder, a brass bob of 25 mm dia. 

ANEMOMETER

Cup shape with counter. The instrument  has a wheel consisting of three conical cups  in horizontal plane. 

JAEGER’S SURFACE TENSION APPARATUS

This method is suitable for the purpose  of studying the variation of surface  tension with concentration of solution of  comment salt in water. 

SURFACE TENSION BALANCE (SEARLE’s)

For measuring surface tension of  soap film or any transparent  liquid, deflection of pointer on  scale gives the reading, steel wire  is stretched on a tripod stand.  With tightening screw, scale-pan  and side clip.  

U-TUBE APPARATUS

For use as a manometer, provided with a  glass tube, meter scale and fitted on wooden  

VISCOSITY APPARATUS STOKE’S METHOD

The instrument is based on principle of fall of  spherical ball through liquid. This instrument  is used to determine viscosity of a transparent  liquid like glycine. 

RESONANCE APPARATUS

To determine the velocity of sound, it  consists of a vertical wooden plank which  carries a wooden scale at one side, a brass  tube on another and a transparent tube in  between. 

ELECTRICAL VIBRATOR

To determine the frequency of  AC mains, E.M.F. Of cells and  capacity of condenser. A thin  steel is clamped at one end and  passes through a small solenoid.  One end of the rod is flattened  and a thread is tied to it. The  solenoid is connected to AC  mains through a suitable lamp  resistance.  

Colitis Oscillator

To study frequency & waveshope generated by Colpitts Oscillator, instrument comprises of 12V DC regulated power supply.

Wien Bridge Oscillator

Using Operational Amplifier IC 741: instrument comprises of 12V DC regulated power supply components mounted on front panel.