ETR-090R110 Built-in temperature controller two-step

Built-in temperature controller two-step

Temperature range 0...+90 °C and +90..+110 °C, hyst. 3 and 15...20 K
change-over contact 16 (1.5) A, 24...250 V AC, IP54
Dimensions 72.5 x 70 x 108 mm, brass pocket 1/2" 130 mm


The ETR... is a series of mechanical pocket thermostats for water, hot water, and gases.  

  • HVAC systems – heat generation, heat exchange stations, DHW preparation, safety elements at heating circuits etc.

The measuring element actuates changeover contacts. TR, STW: Contacts 2 – 3 open if the temperature is higher than the setpoint. STB: Contacts 2 – 1 open if the temperature is higher than the setpoint. 

The devices do not need any servicing or maintenance and can be mounted in any position except those when condensate may cumulate at operating elements or cable glands. 

The temperature sensing elements, torsion element with liquid filling, are mounted into pockets which are part of delivery.

upper step: STB function, restart after cooling down and manual reset
* stainless steel pocket