Low-cost, high-performance transmitter for Pt100 sensors

Delivering a fully temperature-linear 4-20mA output and accurate to +/-0.1degC, the analogue Pt100 sensor transmitter is quickly configured via ConSoft, Inor's Windows-based software. The C201 accepts inputs from standard two- and three-wire Pt100 sensor interfaces, including IEC 60751, JIS C 1604 and several American standards. Designed for harsh environments, the device is tested for vibration up to 10 'g'.

Simon Dugdale, Applications Manager at Hawco, comments: "The C201 temperature sensor transmitter combines fantastic features that are only available in units two or three times the price. Stability and accuracy are the key criteria for control system designers, and the PC-programming functionality makes installation and maintenance very simple."

A ConSoft window lets the user set all parameters from a PC such as sensor type, measuring range, sensor failure action and error correction. Matching to a calibrated temperature sensor to maximise accuracy can easily be performed by entering the sensor errors in the low and high ends of the measuring range. Furthermore, the configuration can be read or edited without a separate power supply by simply connecting the C201 to the USB port of a PC.

Typical applications are found in medicine, hospitals, factories, pharmaceutical industries, food and beverage industries, packaging, schools and building monitoring. Key specifications include: 0.5mA typical sensor current, a maximum wire resistance of 20ohm per wire, response time (90 per cent) of 50ms, a permissible load of 700ohm at 24V DC and polarity-protected power supply of 8.5 to 32V DC.