The JUMO 603021/70 is part of the ATH series of surface-mounted capillary thermostats. These are mechanical temperature controllers, monitors, and safety limiters designed for industrial thermal processes. They operate on the liquid expansion principle, use a capillary sensor, and provide automatic reset switching with ranges up to 500 °C.

 General Information

• Manufacturer: JUMO
• Series: ATH (603021/70 variant)
• Type: Capillary thermostat (surface-mounted)
• Function: Temperature controller (TR), monitor (TW), safety temperature monitor (STW), or safety temperature limiter (STB)

 Technical Specifications

• Temperature Range: Depending on variant, typically 50 °C to 300 °C or up to 500 °C
• Reset Type: Automatic reset
• Mounting: Surface mount design
• Sensor Type: Capillary sensor (liquid expansion principle)
• Switching Device: Microswitch for electrical circuit control
• Protection Rating: IP54 (sturdy case for industrial environments)
• Compliance: Tested according to DIN EN 14597 safety standards