Instrumentation
Instrumentation
Head Quarters Road, Coimbatore, Tamil Nadu
GST No. 33BWSPG4278D1ZE
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Educational Instruments

Leading Manufacturer of educational models, air velocity transducer, hall effect in metals and four probe method from Coimbatore.

Educational Models

Educational Models
  • Educational Models
  • Educational Models
  • Educational Models
  • Educational Models
  • Educational Models
  • Educational Models
  • Educational Models
  • Educational Models
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Approx. Price: Rs 3,000 / PieceGet Latest Price
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Product Details:

BrandV-Tech
TypeEducational Model
SubjectEducational
Usage/ApplicationLaboratory
ColorMixed
Country of OriginMade in India

Educational Models:
  1. Senior Mathematics Kit
  2. Junior Mathematics Kit
  3. Mini Wind Mill Environmental Science Projects
  4. Separation of Substances Physics Projects
  5. Homemade Vacuum Cleaner Physics Project
  6. Work and Energy Physics Projects
  7. Amoeba Model
  8. Petrol Engine 4 Stroke Model
  9. Kids Abacus
  10. Geo Board
  11. Geometrical Figure
  12. Fleming Left Hand Rule Model
  13. Steam Engine Model
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Air Velocity Transducer

Air Velocity Transducer
  • Air Velocity Transducer
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Approx. Price: Rs 4,500 / PieceGet Latest Price

Product Details:

Minimum Order Quantity1 Piece
Transducer TypeTemperature Transducer
BrandVTECH
Country of OriginMade in India
Range25-10,000 ft/min (0.125-50 m/s)
Warranty2 year
Packaging TypeBox

We manufacture an excellent quality Air Velocity Transducer. These transducer are useful for Air velocity measurement in Air or non combustible gases. Air Velocity Transducers are ideal for both temporary and permanent installations for air velocity measurements in research and development labs, manufacturing processes, and other applications.

Features:
  • Long working life
  • High efficiency
  • Durable finish standard

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?


Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

 

  • Laboratory Instrument, Test Equipment,
  • Scientific, Measuring, Precision Instrument,
  • Analytical, Bio Medical, Survey, Electrical,
  • Electronic Instruments ,Weather, Metrology.
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Additional Information:

  • Delivery Time: 1-2 week
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Hall Effect in Metals

Hall Effect in Metals
  • Hall Effect in Metals
  • Hall Effect in Metals
  • Hall Effect in Metals
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Approx. Price: Rs 29,950 / PieceGet Latest Price
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Product Details:

Minimum Order Quantity1 Piece
Usage/ApplicationLaboratory Experiment
Type of InstrumentsSemi- Automatic
MaterialAluminium
Model NumberHEM-01
Display TypeLCD
BrandNunes Instruments

The apparatus consists of the following:

a) Hall Probe-Silver (HP-Ag):

  • Material: Silver Strip (8 x 6 x 0.05 mm)
  • Contacts: Press type for current
  • Spring Type for Voltage
  • Hall Voltage: ~17 µV/10A/10KG

 

b) Hall Probe-Tungsten (HP-W):

  • Material: Tungsten Strip (8 x 6 x 0.05 mm)
  • Contacts: Press type for current
  • Spring Type for Voltage
  • Hall Voltage: ~15 µV/10A/10KG

 

c) High Current Power Supply, PS-20A: 

  • Range: 0-20A continuously variable
  • Accuracy: ±0.5%
  • Regulation: ±0.5% for ±10% variation of mains
  • Display: 3½ digit, 7 Segment LED

 

 

d) Digital Microvoltmeter, DMV-001:

  • Range: 1mV, 10mV, 100mV, 1V & 10V with 100% over-ranging.
  • Resolution: 1μV.
  • Accuracy: ±0.2%.
  • Stability: Within ±1 digit.
  • Input Impedance: >1000MΩ (10MΩ on 10V range).
  • Display: 3½ digit, 7 segment LED with auto. Polarity and decimal indication

 

e) Electromagnet, Model EMU-75T:

  • Pole Pieces: 75mm tappered to 25mm
  • Mag. Field: 17KG ±5% at 10mm airgap
  • Energising Coils: Two of approx. 13W each
  • Power: 0-90Vdc, 3A, for coils in series, 0-45Vdc, 6A, for coils in parallel

 

f) Constant Current Power Supply, Model DPS-175 

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?


Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

 

  • Laboratory Instrument, Test Equipment,
  • Scientific, Measuring, Precision Instrument,
  • Analytical, Bio Medical, Survey, Electrical,
  • Electronic Instruments ,Weather, Metrology.
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Four Probe Method

Four Probe Method
  • Four Probe Method
  • Four Probe Method
  • Four Probe Method
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Approx. Price: Rs 59,500 / PieceGet Latest Price
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Product Details:

Minimum Order Quantity1 Piece
Usage/ApplicationLaboratory Experiment
Automation GradeSemi-Automatic
Code No.9030
Warranty18 Month
BrandV-Tech
Packaging TypeBox

 

Description of the experimental set-up

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°C (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 3½ digit single chip A/D Converter ICL 7107 has been used. It has high accuracy like auto zero to less than 10μV, zero drift of less than 1μV/ °C, 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.

Specifications:

  • Range X1 (0-200mV) & X10 (0-2V)
  • Resolution 100μV at X1 range
  • Accuracy ±0.1% of reading ±1 digit
  • Impedance 1MW
  • Display 3½ digit, 7 segment LED (12.5mm height) with auto polarity and decimal indication Overload Indicator Sign of 1 on the left & blanking of other digits

 

(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.

Specifications:

  • Open Circuit Voltage : 18V
  • Current range : 0-20mA
  • Resolution : 10μA
  • Accuracy: ±0.25% of the reading ±1 digit
  • Load regulation: 0.03% for 0 to full load
  • Line Regulation: 0.05% for 10% changes

 

(iii) Oven Power Supply
Suitable voltage for the oven is obtained through a step down transformer with a provision for low and high rates of heating. A glowing LED indicates, when the oven power supply is ‘ON’. The experimental set-upis complete in all respect.

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

  • Laboratory Instrument, Test Equipment,
  • Scientific, Measuring, Precision Instrument,
  • Analytical, Bio Medical, Survey, Electrical,
  • Electronic Instruments ,Weather, Metrology.
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Four Probe Method

Four Probe Method
  • Four Probe Method
  • Four Probe Method
  • Four Probe Method
  • Four Probe Method
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Approx. Price: Rs 69,500 / PieceGet Latest Price
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Product Details:

Minimum Order Quantity1 Piece
Resolution1K
ApplicationLaboratory Experiment
BrandV-Tech
Range Oven473K
SensorRTD (A class)
Power150W
Temperature RangeAmbient to 473K

Resistivity of Semiconductor 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. In its useful form, the four probes are collinear. The error due to contact resistance, which is significant 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 resistance''''s 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 sample.

Description of the experimental set-up

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 probe arrangement is mounted in a suitable stand, which also hold the sample plate. To ensure the correct measurement of sample temperature, the RTD is enbeded in the sample plate just below the sample. This stand also serves as the lid of temperature controlled oven. Proper leads are provided for the current and voltage measurement.

2. SAMPLE

Germanium crystal in the form of a chip.

3. OVEN

This is high quality temperature controlled oven suitable for Four Probe Set-up. The oven has been designed for fast heating and cooling rates, which enhances the effectiveness of the controller.

4. FOUR PROBE SET-UP, DFP-03

The set-up consists of three units housed in the same cabinet.

(i) Oven Controller

Platinum RTD (A class) has been used for sensing the temperature. A wheatstone bridge and an instrumentation amplifier are used for signal conditioning. Feedback circuit ensures offset and linearity trimming and a fast accurate control of the oven temperature.

Specifications of the Oven

  • Temperature Range : Ambient to 473K
  • Resolution : 1K
  • Stability : +0.5K
  • Measurement Accuracy :+1K(Typical)
  • Oven : Specially designed for Four Probe Set-Up
  • Sensor : RTD (A class)
  • Display : 31/2 digit, 7 segment LED with autopolarity and decimal indication
  • Power : 150W

(i) Multirange Digital Voltmeter

In this unit, intersil 3½ digit single chip A/D Converter ICL 7107 has been used. It has accuracy, auto zero to less than 10 μV, zero drift-less than 1 μV/ °C, input bias current of 10 pA 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.

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?


Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

  • Laboratory Instrument, Test Equipment,
  • Scientific, Measuring, Precision Instrument,
  • Analytical, Bio Medical, Survey, Electrical,
  • Electronic Instruments ,Weather, Metrology.
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Krishna Moorthi (Manager)
Instrumentation
6, G. J. Chandra Complex
Head Quarters Road, Coimbatore - 641018, Tamil Nadu, India


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