Thermostick Elettrotecnica – M-ST26 DAF 27121-000 – ATEX Heat Detector Assembly

The M-ST26 DAF 27121-000 is a flameproof thermal detection unit from Thermostick Elettrotecnica, combining the reliable Fenwal Detect-A-Fire 27121-000 sensor with an ATEX-certified M-ST26 junction box. This device is engineered for fixed-temperature fire detection in explosive atmospheres. The system employs a normally open bimetallic sensing element that activates upon reaching the pre-set temperature threshold, making it ideal for safety-critical industrial applications.

Key Features:

• Model: M-ST26 DAF 27121-000

• Sensor: Fenwal Detect-A-Fire 27121-000

• Alarm Type: Fixed-temperature (max detection)

• Contact Type: Normally open (closes on alarm)

• Temperature Setting: Factory-configured (commonly 163 °C / 325 °F)

• Housing: ST26 aluminum alloy flameproof enclosure

• Cable Entries: Two ¾″ NPT ports

• Mounting: Stainless steel bracket with internal terminal block

• Certifications:

  • ATEX Ex d (Flameproof)

  • Suitable for Zone 1/21 applications

• Ingress Protection: IP66 / IP68

• Operating Temperature: Up to 180 °C (based on sensor configuration)