Target size and distance are critical to accuracy for most IR thermometers

Please note: The given measured spot size contains 90% of the energy detected by the sensor. We normally recommend the target is at least twice as large as the given measured spot for maximum accuracy. Sensors may be used at longer distances than the above diagrams show. There is no maximum measurement distance in clean air; this is because the PyroEpsilon detects only the wavelengths of infrared radiation that are not absorbed by the atmosphere. 2:1 optics are not available on sensors with temperature range 0°C to 500°C as standard. Please contact Calex for more information.

Typical Applications

The emissivity setting of the PyroEpsilon infrared temperature sensor is adjustable via an analogue input, so it can be controlled automatically during the process, for example by a PLC, or manually, by using the controls on the optional PPT245 indicating controller or the optional PyroTune emissivity adjuster. If the emissivity of the target changes during the process, then the PyroEpsilon is ideal.

The PyroEpsilon is also a good choice if a simple pyrometer with a 4-20 mA output is required, but you are not sure if the emissivity of the target surface is high enough for a fixed-emissivity sensor to be suitable. When no 4-20 mA input signal is present, the emissivity setting will default to 0.95. Emissivity adjustment may then be added later on if required.

The PyroEpsilon may be used in many applications, including the following:

Food

Measurement of the temperature of food production equipment including bakery trays and plastic moulds. Surface temperature of PTFE coated rollers.

Paper and Packaging

Glossy or shiny paper temperature

Plastics

Thermoforming temperatures, temperature of plastic bottle parison tubes before inflation in blow moulding

Power Industry

Measuring the temperature of painted surfaces in switchgear cabinets, generator housings

Pipe Coating

Measurement of pipe temperature during coating where the emissivity of the surface increases during the process

Condition Monitoring

e.g. painted bearing housings, driveshafts, rollers and gearboxes. Turbine housing temperature measurement. Monitoring the outer surface temperature of boilers and pipe

Electromagnetic Compatibility Standards

Conforms with EN61326-1, EN61326-2-3 (Electrical Equipment for Measurement, Control and Laboratory Use – EMC Requirements – Industrial)