Digital temperature switches
With the digital temperature switches of the ETTN-YTTN range, Baumer’s product segment Process Instrumentation offers robust measuring instruments for temperature control for industrial process management. The devices are made completely of stainless steel and are particularly suitable for use in severe industrial environments. A special design with a clamp-on sensor enables easy mounting at a pipe with two standard clips. It can measure the temperature of a process without direct contact to the medium.
Based on microprocessor technology, the temperature switches can be programmed completely on site by using code protected keys. They have two threshold outputs, PNP transistors or galvanic isolation. The output signal can be analogue (4 to 20 mA) or digital (RS485 Modbus). The devices can measure a scale from -200 up to +400°C with an accuracy of ±0.5°C. Errors due to thermal resistance of the pipe or thermowell can be corrected by manually entering the process fluid temperature into the ETTN.
Depending on the version, the temperature measurement is conducted by a submerged probe or by surface contact over thermal conduction.
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