Resistance thermometer Insulation Resistance

Resistance thermometer Insulation Resistance

If the sensing element and leads are not completely insulated from the case, a shunting effect occurs in which the case becomes a parallel resistor and lowers apparent readings.

In most industrial thermometers, with specified insulation Resistances in the 100-MO ranges, error approaches zero.

The manufacturer must take care to seal water-absorbing materials. The shunting effect decreases with low resistance elements, which accounts.

The shunting effect decreases with low-resistance elements, which accounts for the use of 25.5 PRT’s in laboratory measurements.

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