Thermostick Elettrotecnica – M‑ST26 MAX – ATEX Fixed-Temperature Heat Detector

The M‑ST26 MAX from Thermostick Elettrotecnica is a fixed-temperature bimetallic heat detector, engineered for hazardous environments requiring ATEX compliance. Designed to activate at a user-specified temperature (typically 88 °C or similar), it operates using a “Max-only” detection principle—triggering when the temperature exceeds the set point. The unit includes a nickel-plated brass sensing head mounted in a rugged ST26 aluminum junction box with IP66/IP68 protection.

Key Features:

• Model: M‑ST26 MAX

• Detection Type: Bimetallic, Max-only heat detection

• Set Temperature: Factory-configurable, typically between 50 °C and 180 °C

• Output Contact: Normally open (closes on alarm)

• Enclosure:

  • Sensor: Nickel-plated brass body

  • Housing: ST26 aluminum alloy box with dual ¾″ NPT cable entries

  • Mounting: Stainless steel bracket with terminal block inside

• Certifications:

  • ATEX Flameproof Ex d

  • Suitable for Zone 1/21 environments

  • Temperature Class: T5/T6

• Protection Rating: IP66/IP68

• Ambient Temperature Range: –20 °C to +180 °C (depending on version)