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)

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