Medical Products

Approx. Rs 550 / UnitGet Latest Price

Properties: Medical Materials & Accessories
Type: Surgical Supplies


Material:PP Nonwoven


Size:S, M, L, XL
Color:white
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Packaging Details:10pcs/bag, 100pcs/carton
Delivery Time : About 5 days

Specifications
1. Soft and comfortable material 
2. Easy to wear 
3. Light weight and breathable 
4. Disposable and Economic

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 9,500 / PieceGet Latest Price

Model No.: VT-1016

Standards: IS 11262-1985, ASTM C 186

Specification: This equipment is required to determine the heat of hydration of cement as expressed in calories per gram. The equipment comprises of the following:
A wide mounted double walled vacuum flask with a stop cock 38 mm & a insulating container for the flask
A Beckman thermometer (Range 5° C) held tightly by the cock stopper in such a way as to avoid accidental contact with the stirrer blade & the reading lens. To facilitate the easy removal the cock stopper is in two halves.
A constant speed stirrer (double bladed propeller type)extended to within 38 mm from the bottom of the flask.
A funnel (Gooch type) with a stem of 6 mm inner dia & a body approx 25 mm long and 25 mm dia. is fitted to the cock stopper for introducing the sample.

Approx. Rs 1.25 Lakh / PieceGet Latest Price

RED-tech Technology Reflectorless EDM

• Fast distance measurement of 0.9s regardless of object.
• Traditional pinpoint precision in reflectorless distance measurement.
• Reflectorless operation from 30cm to 500m.
• Coaxial EDM beam and laser-pointer provide fast and accurate aiming.
• Ensures accuracy even with reflective sheets.

Long Range Data Communication

• The series of total stations features Bluetooth® Class1 wireless technology for reliable data communications.
• All series data is instantly available at the Bluetooth-equipped controller.

Advanced Angle Measurement System

• VT565 Series features original absolute encoders that provide long-term reliability in any job site condition. Dual-axis compensator ensures stable measurements even when setup on uneven terrain.
• Sokkia’s traditional motion clamp and tangent screw are employed to ensure stable angle measurement.

Approx. Rs 9,990 / PieceGet Latest Price

These units are double walled with inner chamber made up of S.S. sheet and outside of M.S. duly enamel painted. The gap between the walls is filled with special grade glass wool in order to avoid thermal losses. A drain plug is also fitted to the unit. The inner chamber fitted with immersion type heating element is covered with perforated removable diffuser tray. The cover is provided with the unit as standard accessory. Temperature from ambient to 100°C is controlled by "EGO"/JUMO" GERMAN Hydraulic Capillary type thermostat with an accuracy of

± 0.5°C. Supplied complete with 220/230 volts A.C. supply.

(a)         300 x 250 x175mm (for 2 rack)

(b)        330 x 300 x175mm (for 4 rack)

(c)         455 x 300 x175mm (for 6 rack)

(d)        605 x 300 x175mm (for 8 rack)

(a)         Stirring arrangement with 1/20 H.P. motor and speed regulator.

(b)        Digital Temperature indicator - cum - Controller.

(c)        PI Digital Temp. Indicator-cum-Controller [stirring arrangement compulsory]

Approx. Rs 4.7 Lakh / PieceGet Latest Price

SPECIFICATIONS

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 15,500 / PieceGet Latest Price

We are providing Global Positioning System. Does your project need to be able to track its position globally? When used in an outdoor environment, the GPS Receiver with its integrated patch antenna can provide standard raw NMEA0183 strings or specific data from up to 12 satellites via a standard serial interface. The module provides current time, date, latitude, longitude, altitude, speed and travel direction/heading among other data, and can be used in a host of applications, including navigation, tracking systems, mapping, fleet management and robotics.

Other Detail:

• This device can be connected to a PC serial port using a MAX232 line driver.
• Single-wire 4800 bps TTL Serial interface to Microcontrollers.
• Provides either raw NMEA0183 strings or specific data, making it easier to use on the microcontrollers
• Simple/raw mode selectable via I/O control

Approx. Rs 12,399 / PieceGet Latest Price

Air Curtain is a modern device which, when installed on a door, forms an invisible curtain of continuous air and thus prevents escape of conditioned air and entry of ouside hot, humid, dirty and unwanted polluted air. The cabinet of Air Curtain are made of high quality cold rolled Mild Steel sheets. The blowers are made of high quality aluminium sheets, duly balanced both, statically as well as dynamically on computerised digital balancing machines, designed to provide uniform air with minimum noise and no vibration. All nits are thoroughly tested at works and meet the highest standards. The motors used are of continuous rating with sealed ball-bearings.

HIGH VELOCITY, MODELS (Approx 10 meters/second).

(a)         Size Door Width 600 m.m. (High Velocity)

(b)         Size Door Width 900 m.m. (High Velocity)

(c)         Size Door Width 1200 m.m. (High Velocity)

(d)         Size Door Width 1500 m.m. (High Velocity)

(e)         Size Door Width 1800 m.m. (High Velocity)

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 9,500 / PieceGet Latest Price

As Per IS 2386 (P-IV) Specification :The selection of proper aggregate for a givenapplication is essential to attain the desired quality. Various characteristics are requiredto be determined for the selection of appropriate aggregate from the wide range available.Aggregate crushing value test apparatus is used for measuring resistance of an aggregateto crushing. Made of Mild Steel comprising of: Cylindrical Cell, 150mm internal dia x 130to 140mm height, Plunger, 148mm dia x 100 to 115mm height, Base Plate, 200 to 230mmsquare x 6mm thickness, Tamping Rod, 16mm dia x 450 to 600mm length. Metal Measure,110mm internal dia x 180mm height

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 1.89 Lakh / PieceGet Latest Price

Product Description

Features

· Suitable for1H and11F nuclei

· FET based marginal Oscillator

· Digital Display of frequency and current

· Clear display of resonance peaks

· Compatible with general purpose CRO

Introduction

Nuclear Magnetic Resonance (NMR) was discovered by Bloch and Purcell in the year 1945. Over the years it has developed into a very useful and powerful tool in solid state physics, chemistry and biology. In medical application this technique, under the name Magnetic Resonance Imaging (MRI) has been developed as an excellent imaging method for clinical diagnosis. In this method use is made of Zeeman interaction of the magnetic dipoles associated with the nucleus when placed in a external magnetic field.

Elementary Magnetic Resonance

An atom whose nucleus has a nulcear spin I will have a magnetic moment as follows

= g_nI (1)

where _nis nuclear magneton, and g is g-factor. Under the influence of an external static magnetic field (H), these nuclear magnets can orient in distinct directions. Each spin orientation corresponds to a particular energy level given by

E = g_nHm_j(2)

with mj= -I, -(I-1), ...............(I-1), I

where mjis magnetic quantum number

The splitting of levels will therefore be-

DE = g_nH or = hn₀ (3)

where n₀is the r.f. frequency applied perpendicular to the static magnetic field. Now if the spins are subjected to a purturbation by an oscillating magnetic field with its direction parallel to the static magnetic field and its frequency n₁such that the quantum hn₁is equal toDE = hn₀, we say that there is a resonance between n₁and n₀. This will induce transition between neighbouring sub levels (m_j=I) and in turn will absorb energy from the oscillating field. Thus, at resonance, we get a peak due to the absorption of energy by the system.

Experimental Technique

Approx. Rs 12,500 / PieceGet Latest Price

Model No.: VT-1006

Standards: IS: 6932 (PART VIII), ASTM C 230, BS 4551:1

Specification: The flow table consists of a 30 cm dia polish steel plate with 3 engraved annular circles 7, 11 and 19cm dia. The table top is arranged for a free fall of 12.5mm by a cam action. Supplied complete with one brass conical mould, 65mm i.d. at base and 40mm i.d. at top, height of the mould 90mm.

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 1,250 / PieceGet Latest Price

Product Specification

Product Description

We are offering a quality range Test Sieves, which are widely appreciated for high consistency, fit and stable functions. These are sourced from reliable vendors of the industry and are offered in customized solutions to meet client's requirements and specifications. Our range of Test Sieves are manufactured for various Household and Industrial usages.

Specifications:

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 7,500 / PieceGet Latest Price

Model No.: VT-1305

Standards: ASTM D2172, AASHTO T-58, T-164

Centrifuge Extractor (Hand Operated) Description: V-Tech an eminence manufacturer & supplier of testing instrument Centrifuge Extractor (Hand Operated), model no. VT-1305 conforms to the ASTM D2172, AASHTO T-58, T-164 industry standards. Centrifuge Extractor (Hand Operated) is basically used in checking and determining the quantitative Bitumen percentage in the bituminous mixtures. In Bituminous mix, a solvent is added and by centrifugal action bitumen is removed. In detail, the bowl is mounted on the vertical shaft that protrudes from the cast housing. The bowl, mounted on a shaft, is rotated manually very fast by the enclosed gears in the cast body with the attached handle. Then, the solvent is added slowly through the housing cap holes. An external drain is provided which collect the dissolved Bitumen that is coming out of the moving/rotating bowl and collected in the housing.

V-Tech Centrifuge Extractor (Hand Operated) is successfully utilized in diverse parts of the different industries varying from automobile, food, pharmaceuticals, manufacturing, oils & gas etc.

Specification:

• Comes with Cylindrical Aluminum rotor bowl with a capacity to carry 1500 gms sample mix, which is easily removable.
• A cap for the bowl, which prevents leakage too.
• A nut to for tightening the cap and bowl

Additional Information:

• Delivery Time: 1 week

Approx. Rs 36,500 / PieceGet Latest Price

Model No.: VT-1147

Empowered with innovative technologies and advanced production unit, we are a renowned manufacturer and supplier of premium quality Power Floater Machine. The offered machine is used for smoothing the surfaces of marbles by rubbing on it. This machine is manufactured using supreme quality components by our adept professionals at our advanced production unit. In addition to this, clients can avail this Power Floater Machine from us at competitive prices.

Features:

• User friendly
• Noise-free operation
• High performance
• Sturdy design

Specification :

Powered :3 H.P. Electric motor through gear box
Floating : 130 RPM

Technical Details:

Approx. Rs 5,500 / PieceGet Latest Price

Model No.: VT-1005

Standards: ASTM C 266

Specification: A base with a Vertical shaft and Two horizontal arms. The lower arms is adjustable for height. 1 no. Initial needle 1/12-inch dia. ¼ lb. Wt. 1 no. Final needle 1/24 inch dia. ¼ lb. Wt. 1 no. Glass base plate. Complete as above.

Additional Information:

• Delivery Time: 1-2 week

Approx. Rs 6,500 / PieceGet Latest Price

Model No.: VT-1249

Capacity: 25kgf to 100kgf (1KN) 200kgf (2KN) 250kgf (2.5KN) 1000kgf (10KN) 2000kgf (20KN) 2500kgf (25KN) 3000kgf (30KN) 5000kgf (50KN) 100KN (10Tons) 200KN (20Tons) 500KN (50Tons) 1000KN (100Tons) 2000KN (200Tons), 3000KN (300 Tons)

Specification: The Proving Rings are made of special steel, carefully forged to provide high and stable accuracy, dependability and repeatability. The dial gauge and anvil are mounted on U-brackets clamped to the ring body by set screws.

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 18,000 / PieceGet Latest Price

Model No.: VT-1130

Standards: ASTM C 469

Specification: Consists of a frame with a bottom ring and a top ring with tightening screws to firmly clamp the compressometer over the cylinder. A dial gauge .002 mm x 5 mm is mounted on the upper ring and the tie of the dial gauge rests on an anvil. The zero on the dial gauge can be set by adjusting the anvil screw. Supplied in a wooden carrying case.

Additional Information:

• Delivery Time: 1 week

Approx. Rs 1,450 / PieceGet Latest Price

Model No.: VT-1011

Standards: IS 4031 1968, ASTM C 188

Specification: Used for finding specific gravity of hydraulic cement. Made from Borosilicate glass. The flask is 243mm in total height, having a bulb of 90mm dia. of 250ml approximate capacity. The long neck of the flask has at top a funnel of 50mm dia. in that fits a ground glass stopper. The neck has over-all 11mm i.d. upper portion is graduated from 18ml to 24ml with 1 ml graduation. Just at the bottom of the neck 1 ml capacity is marked in between there is 17 ml capacity bulb.

Approx. Rs 14,000 / PieceGet Latest Price

Approx. Rs 1.89 Lakh / PieceGet Latest Price

Product DescriptionWith the help of skilled professionals and good knowledgeable experience, we are involved in supplying, exporting and manufacturing quality-assured spectrum of Thermolumniscence Irradiation Unit in Roorkee, Uttarakhand, India.

Experiment:
* Microcontroller based menu driven
* Cost effective solution
* No radiation hazard
* High quality double stage rotary pump
* Long life tesla coil
* Fully self contained

Study of Thermoluminescence in alkali halide crystals need creation of F-centres (colour centres) in alkali halide crystals. To produce the F-centres, the crystals are exposed to ionizing radiation which in turn causes the loss of electron from halide ions. An electron then becomes trapped in the halide ion vacancy. The color is the result of the absorption of a photon by the trapped electron and excitation from the ground state to an excited state for the F-center. This is a classic case of particle in a box.

The source of ionizing radiation could be X-rays, electrons, gamma rays etc. These techniques are too Expensive and unaffordable for normal laboratories. Another method, although little less efficient, is by keeping Alkali halide crystals under low pressure, in the proximity of high Voltage. This in turn produces F-centres in the crystals.

This later technique has been adopted in this set up to make it economical and affordable for all laboratories. The setup is complete in itself and can be used straight away.

Approx. Rs 9,500 / PieceGet Latest Price

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 42,500 / PieceGet Latest Price

Model No.: VT-1140

Specification: The Flexure Strength Testing Machines are designed to provide maximum rigidity throughout their working range. The load is applied by the upward movement of a hydraulic ram. The jack can be raised or lowered for testing different size beams. The load is indicated on a calibrated Bourdon tube type Pressure Gauge of range: 0-100kN x 0.5kN (0-10,000 kgf x 50 Kgf). The load gauge is calibrated against NPL/ NCCBM certified proving ring.

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 18,500 / PieceGet Latest Price

Product Description: V-Tech India manufactures compaction factor apparatus that has been designed as per the international standards and requirements of construction industry. The apparatus allows determining the workability of different types of concrete mixes by assessing the compaction ratio. Having a simple set up, the compaction factor apparatus performs stably and is guaranteed for high durability. It can be used ‘on site’ and the workability of the concrete mix could be easily determined in less of time.

Compaction Factor Apparatus Product specifications :
Compaction factor apparatus from V-Tech India has the following specifications

• The apparatus is made as a rigid metallic frame that has two conical hoppers and one cylinder at its base
• The conical hoppers have hinged trapdoors with quick release catchers at the lower end
• The cylinder top is covered with a circular metal plate
• A plaster trowel and a metal rod rounded at both ends (600 mm in length and 16 mm in diameter) is also provided

Our compaction factor apparatus has been developed with the best quality materials like stainless steel and delivered appropriate finishing and dimensional accuracy to ensure precise results for the engineers and technicians. The compaction factor apparatus conforms to the standards IS 1199 and 5515 and BS 1881 – 103.

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 89,500 / PieceGet Latest Price

Model No.: VT-1015

Standards: IS 4031-1968, IS 1624-1960 & ASTM C 151, C 141

Specification: The autoclave is suitable for conducting accelerated soundness tests on cements or the autoclave expansion test requiring constant steam pressure with the correspondent constant pressure. It consists of a stainless steel cylinder with a welded heat insulated metal housing attractively finished. The attached control unit encloses a sensitive pressure regulator and pressure gauge. Power switches and pilot lights for controlling the electric heating units. Inside chamber dimensions 10.5 cm diameter x 40.5cm height suitable for operation on 230 V, 50 Hz Single Phase A. C. supply. Supplied complete with test bar holder, special rack to hold specimens above water level in the autoclave and in a vertical position to expose them in the same manner. A Digital PID Controller is fitted for controlling the desired temperature.

Note: Ordinary laboratory cement autoclave with mild steel chambers are also available

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 34,000 / PieceGet Latest Price

We are counted among the prominent organizations engaged in providing the customers with excellently designed Digital Theodolites. Fabricated using modern machinery & advanced techniques, our range comprises electro-optical distance gauzing devices for improved accuracy. Widely acknowledged for using absolute encoder's latest algorithm for facilitating easy inspection & gauzing of 3D vectors, the range is available in diverse infrared versions.

Major attributes of the range are:

• High operational accuracy
• Robust construction
• Excellent performance
• Smooth & easy operation
• Save power and display clearly

Specifications :

• Display mode : Double sides display
• Tribrach type : Detachable
• Tilt sensor: A Provide / B unprovided
• Removable tribrach for multiple set-ups
• Horizontal and vertical angle readout
• Method : Incremental reading

Approx. Rs 24,500 / PieceGet Latest Price

The International standard of the product : In Se Test India Pvt. Ltd, we are proficient in taking care of the quality standard of the products. Therefore, we maintain both the national and International standard based on the customers. We work on the quality standard IS 1199 and BS EN 12350 respectively for the national and International customers.

Product Description : The vibration table's measurement is 380 mm in length and 260 mm in width. The elastic support's height is 305 mm above the floor. The measurement of the tamping rod of the slump cone is 16 mm in diameter and it is rounded about 600 mm in each end.

Specification:

• The apparatus consists of a table, elastic support, a cord, a plug, and a stop and start switch.
• There is a holder, which is fixed with the base and there is a swivel arm telescoped with the funnel.
• There is also a swivel arm attached with the vibration table.

Additional Information:

• Delivery Time: 1-2 week

Approx. Rs 1,650 / PieceGet Latest Price

Here are the objective specifications of our slump test apparatus –

• The apparatus can be used for concrete mixes with maximum aggregate size of 38 mm.
• There is a slump cone made of steel. Its lower base diameter is 200 mm while at the top, it has diameter of 100 mm. Height is 300 mm.
• Foot pieces can be fixed to the clamps provided at the base plate. A lifting handle is also attached with the base plate for easy handling
• A 600 mm long and 16 mm wide graduated steel rod is provided as part of the apparatus.

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 3,500 / PieceGet Latest Price

Standards: IS 4031, 2645, 2542 ( PART-1), 1727, 5513 & 712. BS 12, 146, 915, 1370, 4027, 4246, 4248, AASHTO T 129, E 131.

Specification: The apparatus consists of a metallic frame bearing a freely movable and with a cap at top, one vicat mould and glass base plate and one set of needles one each initial needle, final needle and consistency plunger. It comes with a dashpot which facilities gentle lowering of the needles.

Accessories: Mild steel base plate 5 inches x 5 inches. Fulcrum mould , brass , 80 mm i.d. base dia x 70 mm i.d. top dia , 40 mm height.

Note: Normally set of needles and mould which meet is requirements as per I.S. 5513 are supplied. While ordering please specify the specification code of the instrument required. Vicat needle apparatus for determining consistency of hydraulic cement. Gypsum plaster, lime etc. As per ASTM C 187-58 C 472-62 C 110-58, IS 2542(Part-1) can also be supplied.

Additional Information:

• Delivery Time: 1-2 week

Approx. Rs 3,950 / PieceGet Latest Price

Beam mould is used for concrete hardened testing.The material is cast iron and steel. The top brim is special design and avoids defacing the machined surface. Inner surface are all machined by grind mahcine.
Beam mould is designed for concrete hardened testing. Manufactured from cast iron with clamped on type steel base plate in order to conform to the strict specifiction of the standards.

Additional Information:

• Item Code: TIF-5550-A

Approx. Rs 1,250 / PieceGet Latest Price

Product Description: V-TECH India manufactures high quality metallic cube moulds for testing and analysis of the specimens for the parameters of strength, compaction and others. We make very precise moulds as per the demands of construction engineers and laboratories catering the civil engineering verticals. The moulds are made as per the Indian and British standards and conform to all the desirable dimensional characteristics sought for accurate testing. The metallic cube moulds of SE-Test India are developed with the best grade steel and cast iron material to ensure highest quality and finishing of them. Durability is also maximized due to non corrosive and rust resistant nature of the cube moulds.

Product Specifications –
Find out the objective specifications of our cube moulds here below –

• Metric sized cube moulds are available with machined flat surfaces and +/- 0.2 mm accuracy attributes while finishing is within 0.2 mm
• Inch sized cube moulds are offered as machined flat with +/- 0.01 inch accuracy and with 0.01 inch finish
• The metal moulds are delivered complete with their base plate of metal together with the fasteners, clamps and springs

Our metal cube moulds are made as per the industry requirements and are used for high level testing of specimens towards ensuring core stability and strength of structures and buildings.

Standards:

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 3,950 / PieceGet Latest Price

Product Description: V-Tech manufactures cylindrical moulds of metal for specimen testing and analyses of concrete columns. We make cylindrical moulds in standard sizes that are widely used by the civil engineering labs in India and world for testing the compression, linearity, stability and other essential attributes of concrete columns. The moulds are delivered high quality finish at its inner surface to ensure that best specimens are derived without any imperfection. Our cylindrical mould is developed with high grade steel and cast iron material that offer strength and durability, especially the rust and corrosion resistance. The dimensional make of the moulds is such that deformation is negligible even after continued and regular use of them.

Product Specifications –
Find the objective specifications of metal cylindrical moulds of V-Tech India here below –

• The mould is made as split type with two equal segments that can be combined accurately
• Base plate and top plate are offered together with cylinder. Fasteners are also provided
• Base plate and top plate are machined flat to +/- 0.03 mm
• Mean diameter (internal) of the moulds is within the accuracy range of +/- 0.2 mm
• Height of the metal cylindrical mould is within accuracy range of +/- 1 mm

Cylindrical moulds of V-Tech India are made with highest precision & these serve well the demands of engineers and technicians. Our moulds can be used easily on site to make the specimens.

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 29,500 / PieceGet Latest Price

V-Tech is a renowned organization that manufactures and supplies the concrete flow table test set, which is used for high capacity concrete mix and to maintain a flow index by the means of arithmetic. It supplies this product in the reputed construction projects under governmental and non-governmental organizations.

Quality standard of the products : In V-Tech we are professional enough to maintain standard qualities of the products. The concrete flow table test set is manufactured by the means of International standard EN 12350-5.

Product Description : The dimension of the apparatus is 700 X 850 X 300 mm and the weight is 40 kg. Between the two tables, the measurement of the upper table is 700 X 700 mm. The top diameter of the stainless steel cone is 130 +/- 2; the height and base diameter are both 200 +/- 2 and its thickness is 1.5 mm. Set 1106 is for a concrete flow test, Set 1106 A is for cone flow and Set 1106 B is made of wooden tamper 40 X 40 X 335.

Specification:

• The apparatus is made of a double steel table
• The flow index is shown in the arithmetic count.
• The upper table is hinged on the lower one.
• The top table is corrosion protected.

Additional Information:

• Delivery Time: 2-3 weeks

Approx. Rs 59,500 / PieceGet Latest Price

1. Determination of Planck’s Constant and Work Function of Materials by Photoelectric

Effect

It was observed as early as 1905 that most metals under influence of radiation, emit electrons. This

phenomnon was termed as photoelectric emission. The detailed study of it has shown.

1. That the emission process depends strongly on frequency of radiation.

2. For each metal there exists a critical frequency such that light of lower frequency is unable to liberate

electrons, while light of higher frequency always does.

3. The emission of electron occurs within a very short time interval after arrival of the radiation and

member of electrons is strictly proportional to the intensity of this radiation.

The experimental facts given above are among the strongest evidence that the electromagnetic field is

quantified and the field consists of quanta of energy E= hn where n is the frequency of the radiation and h is

the Planck’s constant. These quanta are called photons.

Further it is assumed that electrons are bound inside the metal surface with an energy ef, where f is called

work function. It then follows that if the frequency of the light is such that

hn > ef

it will be possible to eject photoelectron, while if hn

excess energy of quantum appears as kinetic energy of the electron, so that

hn = 2

1 mv2 + ef

which is the famous photoelectrons equation formulated by Einstein in 1905.

The energy of emitted photoelectrons can be measured by simple retarding potential techniques as is done

in this experiment. When a retarding potential V0 is used to measure kinetic energy of electrons Ee, we

have,

Ee =2/1 mv2 = eV0 or V0 = eh

n - f

So when we plot a graph V0 as a function of n, the slope of the straight line yields h and the intercept of

extrapolated point n=0 can give work function f.

2. To verify inverse square law of radiation using a photoelectric cell

If L is the luminous intensity of an electric lamp and E is the illuminanscence (intensity of illumination) at

point r form it, then according to inverse square law.

E = L/2 r

If this light is allowed to fall on the cathode of a photo-electric cell, then the photo-electric current (I) would

be proportional to E.

E = L/2 r=K.I

Hence a graph between

r 2 1

and I is a straight line, which verify the inverse square law of radiation.

THE APPARATUS CONSIST OF THE FOLLOWING :

1. Photo Sensitive Device : Vacuum photo tube.

2. Light source : Halogen tungsten lamp 12V/35W.

3. Colour Filters : 635nm, 570nm, 540nm, 500nm & 460nm.

4. Accelerating Voltage : Regulated Voltage Power Supply

Output : ± 15 V continuously variable through multi-turn pot

Display : 3 ½ digit 7-segment LED

Accuracy : ±0.2%

5. Current Detecting Unit : Digital Nanoammeter

It is high stability low current measuring instrument

Range : 1000 μA, 100 μA, 10 μA & 1μA with 100 % over ranging facility

Resolution : 1nA at 1 μA range

Display : 3 ½ digit 7-segment LED

Accuracy : ±0.2%

6. Power Requirement : 220V ± 10%, 50Hz.

7. Optical Bench : The light source can be moved along it to adjust the distance between light source and

phototube. Scale length is 400 mm. A drawtube is provided to install colour filters, a focus lense is fixed

in the back end.

Approx. Rs 1,950 / PieceGet Latest Price

Model No.: VT-1010

Standards: IS 269, 712, 5514, 1727 , 2645, 6932 ( PART IX) BS 6463

Specification: It consists of a small split cylinder forming a mould. On either side of the split cylinder. Two parallel indicating arms with pointed ends are attached. Supplied complete with two glass plates and a lead weight.

Additional Information:

• Delivery Time: 2-3 weeks