PT100 Temperature Sensor

A PT100 is a resistance thermometer with a platinum element reading 100 Ω at 0 °C. Platinum's resistance-versus-temperature curve is unusually linear, repeatable, and near-unchanged over years, which is why PT100 is the de facto standard wherever accuracy and long-term stability decide the process — pharmaceuticals, food, oil and gas. The 3-wire connection compensates for lead resistance, so the probe can sit far from the device and right at the process point without the cable length turning into a temperature error.

Key features

• −50 to 250 °C measuring range

• Platinum element with high accuracy and long-term stability

• 3-wire hook-up compensates for lead resistance

• RJ45 output on a CANopen bus

• Daisy-chains up to 64 sensors per card

• Works with the FBC0232-01 card and FIDAQUIRE logger

• Up to 500 m of bus at 125 kbit/s

• Power and data share one cable

Connectivity

• RJ45 CANopen output running at 125 kbit/s

• Daisy-chain of up to 64 sensors on one FBC0232-01 card

• Automatic input-break detection reported to the logger

Where it is used

• Process temperature in oil, gas and petrochemicals

• Production and storage temperature in pharma and food

• Boilers, heat exchangers and turbines in power plants

• Furnaces and heat-treatment lines

• Cold stores and clean rooms that need calibration records

• Oil and bearing temperature on rotating equipment

Installation

Give the probe solid thermal contact with the measuring point and route its cable away from power runs — a resistive signal picks up noise easily.