The AT-EH02 Explosion-Proof Addressable Heat Fire Detector is designed for hazardous-area fire detection applications requiring both explosion-proof protection and addressable fire alarm system integration.
The detector combines a rugged explosion-proof housing with an addressable heat detection module. It operates on a loop-powered two-wire bus and occupies one address on the addressable fire alarm control panel. The detector monitors temperature conditions and sends alarm information to the panel when a fire condition is detected.
AT-EH02 is suitable for environments where heat rise is a more reliable fire indication than smoke, such as boiler rooms, generator rooms, kitchens, drying workshops, industrial plants, hazardous storage areas, oil and gas facilities, chemical plants, and combustible dust areas.
Explosion-proof design for hazardous industrial environments
Addressable loop communication for precise alarm location
Suitable for explosive gas atmospheres Zone 1 and Zone 2
Suitable for combustible dust atmospheres Zone 21 and Zone 22
Class A2 heat detection for temperature-based fire alarm
Two-wire loop wiring, polarity-insensitive
Electronic addressing by coder
Compatible with ANWETECH addressable fire alarm control panels
Suitable for harsh locations where smoke detectors may cause false alarms or may not be reliable
Supports electronic addressing and address rewriting by coder
Occupies one address within the address range of 1 to 324
Built-in microprocessor for temperature monitoring and alarm processing
Red LED flashes during polling and illuminates continuously during alarm
Loop-powered operation, no separate 24V power supply required
Remote indicator output available for external alarm indication
Explosion-proof housing suitable for hazardous-area installation
Designed for industrial fire detection applications where heat is the main fire signature
Remote Indicator
Used for external alarm indication when the detector is installed in a hidden or difficult-to-view location.
Explosion-Proof Cable Gland / Sealing Fitting
Used for hazardous-area cable entry according to project installation requirements.
Address Coder
Used to set or rewrite the detector address before commissioning.
| Item | Specification |
|---|---|
| Model | AT-EH02 |
| Product Type | Explosion-Proof Addressable Heat Fire Detector |
| Brand | ANWETECH |
| Operating Voltage | Loop 24V DC, 18V–28V |
| Wiring Method | Two-wire loop, polarity-insensitive |
| Addressing Method | Electronically addressed by coder |
| Address Range | 1–324, occupying one address |
| Detector Class | Class A2 |
| Standby Current | < 0.3 mA |
| Alarm Current | < 1.5 mA without remote indicator; < 3.5 mA with remote indicator |
| Fire LED | Red LED flashes during polling and illuminates in alarm condition |
| Remote Indicator Output | Polarity-sensitive output, maximum output current 2 mA |
| Explosion-Proof Marking | Ex db ib IIB T6 Gb / Ex ib tb IIIC T80°C Db |
| Application Area | Zone 1/2 explosive gas atmospheres; Zone 21/22 combustible dust atmospheres |
| Coverage Area | 30 m² when installation height is ≤8 m |
| Environmental Temperature | -10°C to +50°C |
| Relative Humidity | ≤95% RH, non-condensing |
| Atmospheric Pressure | 80 kPa to 110 kPa |
| Cable Entry Threads | 2 × G3/4" |
| Weight | Approx. 1.2 kg |
| Installation Method | Ceiling mounting with explosion-proof housing |
AT-EH02 is connected to the addressable fire alarm control panel through a two-wire loop circuit. The loop wiring is polarity-insensitive, making installation easier and reducing wiring errors during commissioning.
The detector sends alarm and status information to the addressable control panel through the loop. Each detector occupies one address, allowing the fire alarm panel to identify the exact alarm location.
If a remote indicator is required, the detector can provide a polarity-sensitive remote indicator output. The remote indicator can be used when the detector is installed in concealed spaces or areas where the detector LED is not easily visible.
Oil and gas facilities
Chemical plants
Fuel storage areas
Hazardous warehouses
Combustible dust environments
Generator rooms
Boiler rooms
Industrial kitchens
Drying workshops
Industrial production areas
Paint rooms and solvent storage areas
Power plants and electrical rooms
Areas where smoke detectors are not suitable due to dust, steam, fumes, or normal smoke presence
