We offer an extensive range of apparatus for four probe experiment that are manufactured using superior quality raw material. Durable, precision engineered and safe to use, our range offers accurate results. Our range of four probe experiment apparatus can be customized as per the specific requirements of our clients.

The resistivity measurements of semiconductors can not reveal whether one or two types of carriers are present; nor distinguish between them. However, this information can be obtained from Hall Coefficient measurements, which are also basic tools for the determination of carrier density and mobilities in conjuction with resistivity measurement.As you are undoubtedly aware, a static magnetic field has no effect on charges unless they are in motion. When the charges flow, a magnetic field directed perpendicular to the direction of flow produces a mutually perpendicular force on the charges. When this happens, electrons and holes will be separated by opposite forces. They will in turn produce an electric field (_h) which depends on the cross product of the magnetic intensity, , and the current density, J.
_h = R x
Where R is called the Hall coefficient.
Now, let us consider a bar of semiconductor, having dimension, x, y and z. Let is directed along X and along Z then _h will be along Y, as in Fig. 2.
Then we could write
 
Where Vh is the Hall voltage appearing between the two surfaces perpendicular to y and I = yz
Hall Effect experiment consists of the following:
1. (a) Hall Probe (Ge Crystal); (b) Hall Probe (InAs)
2. Hall Effect Set-up (Digital), DHE-21
3. Electromagnet, EMU-75 or EMU-50V
4. Constant Current Power Supply, DPS-175 or DPS-50
5. Digital Gaussmeter, DGM-102

We export and supply a wide gamut of laboratory apparatus such as Frank Hertz experiment instrument which includes Frank-Hertz tube, electric oven, Keithley 410 Micro-microammeter, various voltage sources, rheostats, two volt-meters. These are used for determining Frank hertz experiment which verifies that energy is arranged into discrete packets or quanta.
 

We offer a wide assortment of specially designed planck's constant experiment equipment which include variable dc power supply (0 5 V), Digital dc Micro ammeter (0-999 µA), Digital dc Voltmeter (0 9.99V) and Precalibrated LEDs  to allow our clients conduct experiment on  Planck's constant (h).
 
Process:

• Measurement of voltage drop across light-emitting diodes (LEDs) of different colors at a constant current
• Plotting of graph for V vs l-1
• Using the appropriate foemula to determine Planck's constant (h)

We manufacture electromagnet which is designed and developed as per quick method experiments. This enables us to achieve Hall Effect as well as magnetic susceptibility in our electromagnet.
 
Some of the features of our range are as follows:
 

• Cost effective
• Customized

 

Our range of Electron Spin Resonance (ERP) Spectrometer is used for detection of food containing stable radicals and after radiation treatment. Easy to use and offering authentic results, our range can be customized as per the client’s requirements
 
Our range is available in the following specifications:
 

• PN - EN 1786
• PN - EN 1787
• PN- EN 13708

We fabricate and supply a wide assortment of digital DC micro voltmeter that is fabricated from superior quality raw material. Demanded largely by scientific institutions and laboratories, our range ensures accurate results. It can be customized as per the requirements of our clients.
 
Our range is available in the following specifications:
 

• Model DMV-001
• Range: 1mV to 10V; Resolution 1 mV

 

Our range of RMS A.C. milli voltmeter is offered in various specifications as per the requirements of our clients.  Possessing high stability and excellent linearity, our range measures the exact RMS voltage. Offering high accuracy, our range is fabricated from premium quality raw material.
 
Some of the features of our range are as follows:]
 

• Model ACM-102
• Range: 20mV to 20V; Resolution 0.01mV
• Measures true RMS voltage
• Accuracy 1%
• High input impedance
• High stability
• Excellent linearity

Leveraging on our expert team and hi-tech machines, we offer a qualitative range of Digital Pico ammeter that are safe and reliable to use. Customized as per the specific requirements of our clients, some of the features of our range include the following:
 

• Model DPM-111
• Range: 1nA to 100mA; Resolution 1pA

 

• Measures current down to 1pa
• All solid state and IC design
• Very low offset current

 

Based on Hall effect, our range of Digital gaussmeter have a hall probe made out of semiconductor like Gallium arsenide, indium antimonide, germanium and others.Customized as per the requirements of our clients, our range possesses the following features:
 

• Standard models available are useful for measuring DC magnetic field upto 20 KGsus
• Possesses a resolution 0.1 gauss]

 
Available in various models to measure ac flux density such as
 

• Laboratory table top
• Portable hand held
• Auto ranging

Used for measuring relative dielectric constant meter permittivity of semi-solid or liquid insulating materials at 1 MHz test Frequency as per ASTM D 924, our range of dielectric Constant Meter is specially designed using superior quality raw material. This instrument is used with SIVA Three Terminal Oil Cell and can also be used with any other test jig. The most important feature of our range is that it offers direct readings that require no calculations.

We design and develop precision engineered laboratory equipment such as magnetic hysteresis loop tracer for research applications wherein one can determine loop tracer. With our technological advanced apparatus allows automatic measurement on basic magnetization curve and magnetic hysteresis loop under static state of soft magnetic material, accurate measurement on static magnetic characteristic parameters such as initial permeability ‘I’, maximum permeability ‘m’, saturation magnetic induction Bs, remanence Br, coercive Hc and hysteresis losses Pu.