Miniature infrared temperature sensor requires no separate controller

Paul Boughton
Micro-Epsilon has launched a new miniature infrared temperature sensor that has an integrated controller and enables temperature measurements from –50 deg C up to 1,600 deg C. The sensor is suitable for temperature measurement tasks in the metal processing industry.
Unlike most conventional thermometers, Micro-Epsilon’s new thermoMETER CSlaser has a double sighting laser rather than a single laser. Single laser only marks the centre of the measuring spot, not the real size. Double laser sighting precisely follows the infrared optical path and marks the real spot size at any distance, therefore preventing inaccurate measurements on small objects. The smallest spot size of 0.05mm (M2 version) is reached on the Cslaser at the crosspoint of both laser beams at 150mm. The sensor can also be optimised for specific measurement tasks by fitting different lenses with varying focal lengths.
As the controller is now integrated within the sensor, the thermoMETER CSlaser is ideal for applications in which installation space is limited – whether on a machine, product or tool.
Initially, the thermoMETER CSlaser is available as either an SF version (8 to 14µm) with a measuring range between –50 deg C and 975 deg C and optical resolution of 50: 1. This version of the sensor is aimed at general temperature measurement tasks.
There is also an M-2 version (1.6µm) for metal processing applications, which measures temperatures from 385 deg C up to 1,600 deg C and has an optical resolution of 300:1. This version is ideal for use with ceramics, metal processing and metal oxides. The short wavelength of 1.6µm reduces temperature measurement errors on surfaces with low or unknown emissivity or with changing emissivity during the process, which is often the case on metal surfaces.
Chris Jones, Managing Director at Micro-Epsilon UK Ltd comments: “As well as providing an analogue two-wire interface, the thermoMETER CSlaser can also send digital data via a USB interface to a PC. This enables both recording and evaluation of the temperature data, as well as remote programming and set up of the sensor, including alarm outputs, which is unusual to see on a two-wire temperature sensor. The emissivity can also be adjusted either on the sensor itself or remotely using the software provided.”
The sensor can operate in ambient temperatures up to 85 deg C without cooling and automatic laser switch off is at 50 deg C. Optional cooling accessories are also available for use at higher temperatures.
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