We TSEW engaged in trading & manufacturing of complete laboratory experiments measuring instruments for BS and MS laboratories of Physics , Electronics & Electrical Engineering . We are reputed for our quality products and excellent after sales support.
1.MagneticFieldMeasurementApparatusMFM-01
2.Planck'sConstantExperiment (By Photoelectric Effect), PC-101
3.Planck'sConstantExperiment (By LED's),PCA-01
4.FrankHertzExperiment,FH-3001
5.IonizationPotentialSet-Up,IP-01
6.e/mExperiment,EMX-01
7.MillikanOilDropExperimentMOD-01
8.FourProbeExperiment,DFP-02(BasicModel)
9.FourProbeExperiment,DFP-03(AdvanceModel)
10.FourProbeSetup,DFP-RM-200(ResearchModel)
11.FourProbeSetup,FP-01(ForResistivityMapping)
12.MeasurementofMagnetoresistance,MRX-01
13.MegnetoresistanceinBismuth,MRB-11
14.MeasurementofMagnetoresistance,MRX-RM(ResearchModel)
15.TwoProbeMethod, TPX-200(High resistivity measurement)
16.TwoProbeMethod, TPX-200C(with USB Interface)
17.TwoProbeSetup, TPX-600
18.TwoProbeSetup, TPX-600C
19.ElectronSpinResonanceSpectrometer,ESR-105
20.NMR Spectrometer, NMR-01
21.ZeemanEffectExperiment,ZEX-01
22.StudyofThermolumniscenceofF-Centers,TLX-02
23.HallEffectExperiment,HEX-21
24.HallEffectExperiment,HEX-21C
25.HallEffectinBismuth,HEB-11
26.HallEffectExperiment,HEX-Research
27.HallEffectinMetals,HEM-01
28.DependanceofHallCoefficientonTemperature,HEX-22
29.Quinck'sTubeMethod,QTX-01
30.Gouys'sMethod,GMX-01
31.Gouys'sMethod,GMX-02
32.MagneticHysteresisLoopTracer,HLT-111
33.MagneticHysteresisLoopTracer,HLT-111C
34.StudyofPNJunctions,PN-1
35.StudyofDiodeCharacteristics,SDC-02
36.StudyofDielectricConstantinFerroelectricCeramics,DEC-01
37.StudyofDielectricConstantinLiquids,DCL-01
38.Dielectric Measurement Setup, DEC-600
Product Details:
Minimum Order Quantity | 1 Set |
Model Name/Number | FH3001 |
Power | 220 V+-10% mains,50 Hz |
Display | 31/2 digit 7 segment LED |
Range | 0-5V,0-15V & 0-100V |
Range Multiplier | 10-7,10-8,10-9 |
Scanning Voltage | 0-80 V |
Frank and Hertz in 1914 set out to verify these considerations:
Operating Principle:
Frank-Hertz Experiment Set-up, Model FH-3001, consists of the following:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Model Number | DFP03 |
Temperature Range | Ambient to 473 K |
Resolution | 1 K |
Stability | +/- 0.5 K |
Measurement Accuracy | +/- 1 K |
Power | 150 W |
Resistivity of Semiconductor by Four Probe Method at different temperatures and determination of the band-gap:
Description of the experimental set-up:
Probes Arrangement:
Sample:
Oven:
Four Probe Set-up, Dfp-03:
Oven Controller:
Multirange Digital Voltmeter:
Constant Current Generator:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Display | 7/2 digit,7 segment LED |
Current Range | 0-20 mA,0-200 mA |
Accuracy | +-0.25% of reading +- digit |
Regulation | 10 uA |
Load Regulation | 0.03 % for 0 to full load |
Line Regulation | 0.05 % for 10 % Changes |
Four probe set-up for mapping the resistivity of large samples:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Physics Lab |
Range | 0-20 mA |
Accuracy | +-0.25 % of reading +- 1 Digit |
Regulation | 10 uA |
Load Regulation | 0.03 % for 0 to full load |
Line Regulation | 0.05 % for 10 % Variation |
Introduction:
Theory:
Hall Effect experiment consists of the following:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Accuracy | +-0.25% of reading +- digit |
Material | Mild Steel |
Display | 7/2 digit,7 segment LED |
Usage/Application | Physics Lab |
Range | 0-20 mA,0-200 mA |
Regulation | 10 uA |
Measurement of Magnetoresistance in Bismuth:
Experimentental Set-Up For Magnetoresistance:
The set-up consists of the following:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Industrial |
Model Name/Number | NMR 01 |
Packaging Type | Box |
Voltage | 220-240 V |
Frequency | 50-60 Hz |
Model | NMR01 |
Features:
Introduction:
Elementary Magnetic Resonance:
Experimental Technique:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Laboratory |
Model Name/Number | TPX200 |
Accuracy | +/- 0.3 Degree C |
Temperature Range | Ambient to 200 Degree C |
Measurement Accuracy | +/- 0.5 Degree C |
Model | TPX 200 |
Two Probe Method for resistivity measurement of insulators at different temperatures:
Description Of The Experimental Set-Up:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Physics Lab |
Material | Mild Steel |
Temperature Range | Ambient to 600 deg C |
Power Supply | 100-240 V AC; 50/60 Hz |
Display Accuracy | +-0.3 % |
Sampling Time | 0.5 sec |
Two Probe Method For Resistivity Measurement of Near Insulators at Different Temperatures (Ambient to 600 DC)
Description:
Description of the experimental setup:
Two Probes Arrangement:
PID Temperature Controller:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Physics Lab |
Material | Mild Steel |
Accuracy | +-0.3 % |
Voltage | 1500 V |
Power Supply | 100-240 V AC; 50/60 Hz |
Model | TPX 200 C |
Two Probe Method for resistivity measurement of insulators at different temperatures:
Description Of The Experimental Set-Up:
Two Probes Arrangement, TPA-01:
PID Controlled Oven, PID-TZ:
DPM-111C:
EHT-11C:
Computer Interface, SES-CAMM:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Laboratory Experiment |
Model Name/Number | IP01 |
Automation Grade | Semi-Automatic |
Frequency | 50 Hz |
Voltage | 220 V |
Model | IP-01 |
Introduction:
Operating Principle:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Laboratory |
Helmholtz coils of Radii | 14 |
Number of Turns | 160 on each coil |
Accelerating Voltage | 0 - 250 V |
Deflection Plates Voltage | 50 V - 250 V |
Operating Voltage | 220 V AC/ 50Hz |
Description of The Experimental Set Up:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Accuracy | +-0.1% of reading +-1 digit |
Range | X1 (0-200mV) & X10 (0-2V) |
Resolution | 100mV at X1 |
Stability | +-1 digit |
Input Impedance | 1MW |
Display | 31/2 digit,7 segment LED |
Resistivity of Semiconductors by Four Probe Method at Different Temperatures and Determination of the Band-gap
The Four Probe Method is one of the standard and most widely used method for the measurement of resistivity of semiconductors. The experimental arrangement is illustrated. In its useful form, the four probes are collinear. The error due to contact resistance, which is specially serious in the electrical measurement on semiconductors, is avoided by the use of two extra contacts (probes) between the current contacts. In this arrangement the contact resistance may all be high compare to the sample resistance, but as long as the resistance of the sample and contact resistances are small compared with the effective resistance of the voltage measuring device (potentiometer, electrometer or electronic voltmeter),the measured value will remain unaffected. Because of pressure contacts, the arrangement is also specially useful for quick measurement on different samples or sampling different parts of the same sample.
Description of the experimental setup
1. Probes Arrangement
It has four individually spring loaded probes. The probes are collinear and equally spaced. The probes are mounted in a teflon bush, which ensure a good electrical insulation between the probes. A teflon spacer near the tips is also provided to keep the probes at equal distance. The whole -arrangement is mounted on a suitable stand and leads are provided for the voltage measurement.
2. Sample
Germanium crystal in the form of a chip
3. Oven
It is a small oven for the variation of temperature of the crystal from the room temperature to about 200 DegreeC (max.)
4. Four Probe Set-up, DFP-02
The set-up consists of three units in the same cabinet.
(i) Multirange Digital Voltmeter
In this unit, intersil 31/2 digit single chip A/D Converter ICL 7107 has been used. It has high accuracy like auto zero to less than 10mV, zero drift of less than 1mV/ DegreeC, input bias current of 10pA max. and roll-over error of less than one count. Since the use of internal reference causes the degradation in performance due to internal heating, an external reference has been used.
(ii) Constant Current Generator
It is an IC regulated current generator to provide a constant current to the outer probes irrespective of the changing resistance of the sample due to change in temperatures. The basic scheme is to use the feedback principle to limit the load current of the supply to preset maximum value. Variations in the current are achieved by a potentiometer included for that purpose. The supply is a highly regulated and practically ripple free d.c. source. The current is measured by the digital panel meter.
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Laboratory |
Packaging Type | Box |
Power | 150 W |
Temp. Range | Ambient to 200 deg C |
Display Accuracy | +-0.3 deg C |
Measurement Accuracy | +- 0.5 deg C |
Four Probe Set-Up for Measuring the Resistivity of Very Low to Highly Resistive Samples at Different Temperature
Description:
Description Of The Experimental Set-Up:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Physics Lab |
Accuracy | +-0.2% of the reading +-1 digit |
Resolution | 10 mA |
Current | 0-20 mA |
Load Regulated | 0.03% for 0 to full load |
Line regulation | 0.05% for 10% variation |
It is noticed that the resistance of the sample changes when the magnetic field is turned on. The phenomenon, called magnetoresistance, is due to the fact that the drift velocity of all carriers is not same. With the magnetic field on; the Hall voltage V is given as which compensates exactly the Lorentz force for carriers with the average velocity; slower carriers will be over compensated and faster one undercompensated, resulting in trajectories that are not along the applied field. This results in an effective decrease of the mean free path and hence an increase in resistivity.
Here the above referred symbols are defines as v = drift velocity; E = applied electric field; t = thickness of the crystal; H = Magnetic field
Description of the experimental setup:
Four Probe arrangement:
Magnetoresistance Set-up, Model DMR-11:
(a) Digital Millivoltmeter Intersil 31/2 digit single chip ICL 7107 been used. Since the use of internal reference causes the degradation in performance internal heating an external reference been used. Digital voltmeter is much convenient to use, because the input voltage of either polarity can be measured. Specifications Range 0-200mV (100mV minimum) | (b) Constant Current Power Supply This power supply, specially designed for Hall Probe, provides 100% protection against crystal burn-out due to excessive current. The supply is a highly regulated and practically ripple free dc source.
|
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Physics Lab |
Material | Mild Steel |
Design Type | Special |
Power Supply | 100-240 V AC; 50/60 Hz |
Display Accuracy | +-0.3 % |
Sampling Time | 0.5 sec |
Two Probe Method For Resistivity Measurement of Near Insulators at Different Temperatures (Ambient to 600 DegreeC) with computer interfacing facility:
Description:
Description Of The Experimental Set-Up:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Physics Lab |
Material | Mild Steel |
Range | 100 nA to 100 mA |
Accuracy | 0.2% |
Regulation | 0.05 % |
Display | 7/2 digit 7 segment LED |
Study of Thermoluminescence of F-centers in Alkali Halide Crystals:
A colour centre is a lattice defect that absorbs visible light. The simplest colour center is an F-centre. The name comes from the German word for colour, Forbs. We usually produce F-centres by heating the crystal in excess alkali vapours or by irradiation. The new crystals show an absorption band in the visible or ultraviolet, whereas the original crystals are transparent in that region. This absorption band is called F-band.
An F-centre can be regarded as a negative ion vacancy and an electron which is equally shared by the positive ions, surrounding the vacant lattice site. Conversely a hole may be trapped at a +ve ion vacancy or at a -ve ion, giving rise to V- and H-centres respectively.
Color centres produced by irradiation with x-rays:
Thermoluminescence:
The experiment consists of the following:
Experimental Set-Up for creating Thermolumnescece:
For Measurement of Luminescence Intensity:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Accuracy | +-0.25 % of reading +- 1 Digit |
Material | Metal |
Display | 7/2 Digit,7 Segment Led |
Automation Grade | Semi-Automatic |
Range | 0-20 mA,0-200 mA |
Regulation | 10 uA |
Introduction:
Theory:
As you are 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 ( Eh) which depends on the cross product of the magnetic intensity, H , and the current density, J.Eh=RJ X H where R is called the Hall Coefficient Now, let us consider a bar of a semiconductor, having dimensions, x, y and z. Let J be directed along X and H along Z, then Ehwill be along Y. Then we could write where Vhis the Hall voltage appearing between the two surfaces perpendicular to y and I=Jyz.
Hall Effect experiment consists of the following:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Research |
Type Of Instruments | Physics |
Range | 0-20 A |
Accuracy | +-0.5 % |
Regulation | +-0.5 %+-10 % |
Display | 7/2 Digit,7 Segment Led |
Description of the experimental set-up:
The set-up consists of the following:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Wave Length | 546 nm |
Tmax | 74% |
HBW | 8 nm |
Voltage | 415 V |
Application | Laboratory |
Lab | Physics Lab |
Introduction:
Description of the experimental setup Experimentental Set-up for Zeeman Experiment:
The set-up consists of the following:
Result:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Physics Lab |
Material | Mild Steel |
Model Name/Number | PC101 |
Automation Type | Semi-Automatic |
Resolution | 1nA at 1mA range |
Display | 3 1/2 digit 7-segment LED |
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Physics Lab |
Material | Mild Steel |
Model Name/Number | PCA01 |
Resolution | 1 uA |
Display | 3 1/2 digit 7 segment LED |
Model | PCA 01 |
Dependence of current (I) on temperature (T) at constant applied voltage (V):
The following facilities are built in for this
Current Meter | A highly stable current meter with 31/2 digit display Range 0-2mA with resolution of 1mA |
Oven | It is a small temperature controlled oven with built-in RTD sensor. The temperature is adjustable from ambient to 65 DegreeC and displayed on 31/2 digit panel meter. The stability of temperature is +- 0.2 DegreeC. |
Voltmeter | A high stability voltage source with 31/2 digit display |
Material Constanth:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Usage/Application | Physics Lab |
Material | Mild Steel |
Model Number | MOD 01 |
Frequency | 50 Hz |
Voltage | 220 V |
Usage | Industrial |
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Model Name/Number | ESR105 |
Material | Mild Steel |
Mass Accuracy | 0.5% |
Dimension | 135 x 60 x 33 mm |
Weight | 264 g |
Voltage | 240 V |
Model | ESR-105 |
Features:
Introduction:
Elementary Magnetic Resonance:
Experimental Technique:
Additional Information:
Product Details:
Minimum Order Quantity | 1 Set |
Model Name/Number | HEX21 |
Range | 0-20 mA |
Accuracy | +-0.2% of reading +- 1 Digit |
Regulation | 10 uA |
Load Regulation | 0.03 % for 0 to full load |
Line Regulation | 0.05 % for 10 % Variation |
Introduction:
Theory:
Hall Effect experiment consists of the following:
Additional Information: