Description
Buy online for small quantities. For large quantities, projects and repeat business send a quotation request to: sales@birkettcontrols.com.au
Emteq ST03 Non-contact Temperature Transmitter, a two-wire loop-powered infrared sensor providing a linear 4–20 mA output for non-contact surface temperature measurement. The ST03, supplied by Emteq Sensors, measures surface temperature from 0°C to 1200°C without physical contact with the target, transmitting the measured temperature as a standard 4–20 mA signal. This output is compatible with almost any indicator, controller, recorder or data logger, without the need for special interfacing or signal conditioning. As a two-wire loop-powered device, the ST03 offers a simple, robust solution for most non-contact temperature applications.
Non-contact Infrared Sensing
The ST03 detects infrared energy radiated from the target surface across an 8 to 14 µm spectral band, allowing temperature measurement without contact. It suits most materials, including food, paper, textiles, plastics, leather, tobacco, chemicals, rubber, coal and asphalt. It is not suitable for low-emissivity materials such as polished metals, where the reflective surface prevents reliable measurement.
Optics and Response
The sensor has a distance-to-spot ratio of 20:1, meaning the measured spot diameter is one-twentieth of the distance from sensor to target, allowing smaller targets to be measured from further away. Accuracy is ±1.5% or ±1.5°C, whichever is greater, with a fast response time of 240 ms to 90% of a step change.
Construction and Mounting
Housed in a compact stainless steel body measuring 19 mm in diameter by 113 mm in length, the ST03 carries an M18×1 thread on the sensing head for straightforward mounting. It is supplied with a 1.5 m cable as standard, with longer lengths available to order, and weighs approximately 180 g with the standard cable. The enclosure is rated IP65 for protection against dust and water ingress.
The Emteq ST03 is available in a range of measuring spans up to 1200°C. Refer to the specifications for the full range of measuring options.
Delivery time for non-stocked configurations is typically 4–6 weeks.
To order a configuration not included in the above list or for application advice, send your request to: sales@birkettcontrols.com.au or contact us for more information on 02 9560 8593
Typical Application Areas:
Non-contact surface temperature measurement across process, manufacturing and machinery monitoring applications, including early warning of overheating in moving or rotating machinery parts, and measurement of food, paper, textiles, plastics, rubber, coal and asphalt.






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