More than sensors+automation

Surface-Mounted Double Thermostat, ATH Series (603026)


  • Liquid expansion
  • Microswitch
  • Self-monitoring (STB/STW) in the event of a pressure drop
  • Safety switch-off (STB/STW) at -20 °C
  • 2 separate measuring and switching systems

Versions according to DIN EN 14597

  • Temperature controller (TR)
  • Temperature monitor (TW)
  • Temperature limiter (TB)
  • Safety temperature limiter (STB)
  • Safety temperature monitor (STW)

Customer benefits

A large number of articles held in stock guarantee short-term delivery.

An aluminum die cast case bottom section and a top section coated with impact-proof paint protects the thermostat and makes it impervious to ambient temperature influences.

Energy saving
No additional auxiliary energy is required for temperature measurement. For this reason, the electromechanical thermostat offers a decisive advantage.


Control and monitoring of thermal processes

  • In apparatus engineering
  • In furnace construction
  • In the heating and air conditioning technology industry
  • In laboratory and climatic cabinets


Thermostats control and monitor thermal processes. Surface-mounted double thermostats from the ATH series consist of 2 separate measuring and switching systems.

The devices are available as temperature controllers TR, temperature monitors TW, safety temperature monitors STW (STB), and safety temperature limiters STB. In the event of a malfunction, the STB places the system being monitored in a safe operating status.

Surface-mounted double thermostats operate according to the liquid expansion principle – a microswitch is used as an electrical switching element.

Declaration of Conformity / White Paper