Double immersion thermostat JUMO ATHs-120

• Devices from the ATH model range consists of two separate measurement and switching systems with the temperature controller TR and safety temperature monitor STW functions
• work according to the principle of fluid expansion; a micro switch is used as a switching element
Self-monitoring with the safety temperature monitor STW
If the measuring systems is destroyed, i.e if the expansion liquid escapes, the pressure in the diaphragm drops with the STW, and the circuit remains open
• Unlocking is no longer possible.
• When the sensor cools to a temperature under approx. -20°C, the circuit is also opened, when the temperature rises above approx. -20°C, reactivation takes place automatically with the STW