Temperature Indicators Launched by Cropico

Cropico has launched the 3000 series of portable, high-accuracy digital temperature indicators that features three units, all with one milli-Kelvin resultion for real-time displays. The series, designed for precision temperature measurement in a range of electronics, industrial, scientific and environmental monitoring applications, comes with a choice of inputs for platinum resistance digital thermometers and all popular thermocouple types.

The Cropico 3000 has inputs for Pt25 and Pt100 platinum resistance thermometers and thermocouples. The 3001 offers the same flexibility but does not include the PT25 input option, while the 3002 is designed for use with Pt100 platinum resistance thermometers only.

Micro Ohmmeter - Micro Ohm Meter

Cropico are the UK's industry leading Micro Ohmmeter or Micro Ohm Meter manufacturer.

Self Heating Thermometers - Resistance Measurement

Self-heating Thermometers

Resistance Measurement

To measure the resistance of the temperature detector, a current must be passed through the device - typically a current 1mA to 5mA. A source current of 1mA flowing through the 100Ω resistance will generate 100μW of heat. If the sensor element is unable to dissipate this heat it will indicate an artificially high temperature.

This effect can be minimised by using a large sensor element that is in good thermal contact with its measurement environment, while allowing sufficient time for the temperature to stabilise. An alternative is to use a short measurement pulse of current thus minimising the heating effect. A good thermometer may be configured to measure with either a continuous or a short current pulse ensuring that the best possible measurement is made.