ROTOTHERM – HNL PNEUMATIC TEMPERATURE SWITCH 78N.T.8145.67.12/330/NPT 700 SERIES SWITCHES
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Product detail:
Designed to complement the extensive Series 700 Pressure and DP switches, Series 700 Temperature Switches offer accurate, reliable switching in a robust cast enclosure. Featuring:
Ranges from –50°C TO +400°C
Both vapour filled and gas filled systems are available. Vapour filled systems have the advantage of negligible ambient temperature effects on the switching point. Gas filled temperature systems provide larger ranges and are more suited to applications where switching points are close to ambient temperature.
Wide range of output switches
Series 700 pneumatic output switches make extensive use of the HNL precision pilot valve (PPV). This valve provides a final switching differential equal to that obtained by the use of a sensitive electrical microswitch.
Direct and remote mounting version available
Direct mounting (as shown opposite) allows the switch to be screwed directly into a thermowell (pocket). With remote mounting versions the temperature bulb is secured in the thermowell and connected to the switch housing via a capillary tube.
Both types are available with aluminium housings for general industrial
use or stainless-steel housings for ultimate protection from the environment. The temperature system in all versions is fully welded in 316 Stainless Steel.
Field adjustable
The setpoint of the switch is adjusted by means of a capstan head screw, located within the lower section of the enclosure.
Accuracy and repeatability
These switches provide excellent repeatability and long in-service life.
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