Non-contact infrared temperature sensor

The PyroCouple series non-contact infrared temperature sensors can be used to measure the temperature of inaccessible or moving objects and materials. They can measure temperatures from -20 to 500 °C accurately and consistently, with a response time of 240 ms.

Two-wire sensors transmit the target temperature as a 4-20 mA output and offer a simple solution for most non-contact temperature measurement applications.

Four-wire sensors transmit the target temperature as a 0-50 mV or thermocouple output (type J, K or T) plus the internal sensor temperature as a 4-20 mA output. This second output can be used to ensure that the sensor is being operated within the correct ambient temperature limits and to prevent damage caused by overheating or overcooling. It can also be used to give an approximate indication of the air temperature surrounding the sensor.

All PyroCouple sensors are fitted with germanium lenses for accurate optics. Model PC21 has 2:1 optics making it suitable for most applications where the sensor can be mounted close to the target. Model PC151 is designed for small or distant targets and has an optical resolution of 15:1. Model PC301 is designed for very small or distant targets and has an optical resolution of 30:1.

The sensor itself is 103 x 18 mm and made of polished stainless steel, sealed to IP65, making it suitable for food and pharmaceutical applications. It is held in place by a mounting nut. Fixed and adjustable brackets are offered to simplify mounting and a laser-sighting tool is available to assist in the sighting of the sensor.

If the sensor is required to operate in a very high or low ambient temperature (less than 0 °C or more than 70 °C) it can be ordered with a water/air-cooled jacket built around it. For dusty environments an air-purge collar can be fitted to keep the lens clean.

Built-in adaptive filtering provides a very stable signal without compromising the 250 ms response time, so there is no need to sacrifice a fast response in order to achieve a stable reading.