The M‑ST26 DAF 27121‑000 is an ATEX-certified Detect-A-Fire (DAF) heat detector assembly from Thermostick Elettrotecnica (OEM for Kidde/Fenwal), featuring a rugged junction box with thermostat sensor. The detector uses the classic Fenwal compensating bimetal method to sense heat rise, delivering reliable fire detection with minimal false alarms. Enclosed in an aluminium alloy housing with terminal block and mounting bracket, it’s designed for harsh industrial environments and classified hazardous areas.

Key Features:

Model / P/N: M‑ST26 DAF 27121‑000
Sensor Type: Fenwal Detect‑A‑Fire heat detector (compensating bimetal) certified UL/FM
ATEX Certified: Suitable for use in explosive atmospheres (M‑ST26 ATEX)
Mounting Box: ST26 aluminium alloy junction box with bracket and terminal block
Mount Head: Brass fitting, normally open contact that closes on alarm
Temperature Settings: Range of activation options available (e.g., 325 °F/163 °C shown)
Ingress Protection: IP65/66 rated for high humidity and dust sealing
Electrical: 24–48 V DC supply; maximum current 2 A; 4-wire connection (2 black, 2 white)
Wire Glands: Two ¾″ NPT threaded ports included

Thermostick Elettrotecnica – M-ST26 DAF 27121-000 – ATEX Rated Detect-A-Fire