The AT-EH01 is an ATEX-certified explosion-proof point thermal fire detector designed for fire detection in hazardous industrial areas where explosive gas or combustible dust may be present.
It is suitable for Zone 1 and Zone 2 explosive gas atmospheres of Group IIA, IIB and IIC, Temperature Classes T1 to T6, as well as Zone 21 and Zone 22 combustible dust atmospheres.
The detector uses a thermal sensing element and built-in microcontroller fire detection algorithm to provide stable and reliable operation, especially in locations where fire may cause rapid temperature rise.
AT-EH01 is a non-addressable switch-type relay output detector, compatible with conventional fire alarm control panels from different manufacturers.
ATEX-certified explosion-proof thermal fire detector
Designed for hazardous gas and combustible dust areas
Suitable for Zone 1 and Zone 2 explosive gas atmospheres
Suitable for Zone 21 and Zone 22 combustible dust atmospheres
Applicable for gas groups IIA, IIB and IIC
Temperature classes T1 to T6
Explosion-proof marking: Ex db ib IIB T6 Gb / Ex ib tb IIIC T80°C Db
Non-addressable relay output design
Compatible with conventional fire alarm control panels
DC 24V non-polarized power input
One set of NO and one set of NC dry contact output
A1R heat detector alarm category
Red LED status indication
Coverage area up to 30 m² when space height is ≤ 8 m
2 × G3/4" cable entry threads for industrial installation
| Parameter | Specification |
|---|---|
| Model | AT-EH01 |
| Product Type | Explosion-Proof Point Thermal Fire Detector |
| Certification | ATEX certified, 3C certification and explosion-proof certification |
| Explosion-Proof Marking | Ex db ib IIB T6 Gb / Ex ib tb IIIC T80°C Db |
| Operating Voltage | DC 24V ± 2V, non-polarized |
| Alarm Category | A1R |
| Standby Current | ≤ 60 μA |
| Alarm Current | 10 mA to 30 mA |
| Alarm Output | One set of Normally Open + one set of Normally Closed dry contacts |
| Alarm Reset | Momentary power interruption, min. 10 s, max. DC 2.5 V |
| Power-up Time | ≤ 10 s |
| Alarm Indicator | Red LED, flashes during normal operation and steady light during alarm |
| Coverage Area | 30 m² when space height is ≤ 8 m |
| Ambient Temperature | -20°C to +50°C |
| Relative Humidity | ≤ 95% RH, non-condensing |
| Atmospheric Pressure | 80 kPa to 110 kPa |
| Cable Entry Threads | 2 × G3/4" |
| Weight | 1.2 kg |
AT-EH01 uses DC 24V non-polarized power input and provides dry contact relay output for connection with conventional fire alarm control panels.
| Terminal | Function |
|---|---|
| DD | DC 24V power input, non-polarized |
| NO | Normally Open contact |
| COM | Common terminal |
| NC | Normally Closed contact |
The detector provides one set of Normally Open and one set of Normally Closed dry contacts. Alarm reset is performed by momentary power interruption.
Oil and gas facilities
Petrochemical plants
Chemical processing areas
Paint storage rooms
Solvent storage areas
Fuel storage areas
Hazardous industrial workshops
Combustible dust environments
Zone 1 and Zone 2 hazardous gas areas
Zone 21 and Zone 22 combustible dust areas
Factories with rapid temperature rise fire risks
Conventional fire alarm systems requiring relay output heat detection
