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TWO PROBE METHOD FOR RESISTIVITY MEASUREMENT OF INSULATORS

Home Electronics Physics & Material Science Lab TWO PROBE METHOD FOR RESISTIVITY MEASUREMENT OF INSULATORS

TWO PROBE METHOD FOR RESISTIVITY MEASUREMENT OF INSULATORS

Category: Electronics

Model No:SP-TP-RIS

Two Probe Method for resistivity measurement of insulators at different temperatures. The Two Probe Method is one of the standard and most commonly used method for the measurement of resistivity of very high resistivity samples near insulators. The resistivity measurement of such samples is beyond the range of Four Probe Method.

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Product Description

It has two spring load contact probes. These probes move in a pipe and are insulated by PTFE washers. This probes arrangement is mounted in a suitable stand, which also holds the sample plate and RTD sensor. The stand also serves as the lid of PID Controlled Oven. PTFE coated leads are provided for connecting with High Voltage Power Supply and Digital Picoammeter . With this set-up assuming max. Voltage = 1500V; current 10x10-¹² A A (max) and thickness of sample 1mm, the resistivity of the sample could be measured upto 1014 ohm.cm.. PID Controlled Oven,  PID-200C

Scope of Learning:

  • To determine resistivity of very high resistivity samples near insulators

Technical Specifications:

PID OVEN

  •     Range                  :    Ambient to 200'C
  •     Control Method    :    PID
  •     Measurement Accuracy : ±0.5ºC (typical)
  •     Display                   :    7 segment LED

High Voltage Power supply

  •     Voltage         :    0-1500V 
  •     Current         :     10x10-¹² A (max)
  •     Safety           :    Fuse 5A

Digital Picoammeter

  • Current            :     10x10-¹² A
  • Display            :    3 1/2 Digit     
  • Input Mains     :    220-230V AC 50Hz
  • Weight             :    20 Kg Approx

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