Fire doesn’t always begin with smoke. Sometimes it begins with heat. A loose cable joint, an overworked transformer, a friction point on a conveyor belt — these are the silent precursors to industrial fire. HazenFire AT-EH03 is engineered to catch that heat the instant it crosses the danger line, even in the most explosive environments on a job site.
When Smoke Detection Isn’t the Right Tool
In countless industrial facilities, fire risk rarely makes its first appearance as visible smoke or open flame. More often, it starts quietly — as abnormal temperature rise at cable joints, electrical equipment, transformer areas, conveyor systems, hydraulic stations, or oil pipe galleries.
For these high-risk points, a standard smoke detector simply isn’t built for the job. The more direct, more reliable approach is to monitor temperature at the risk point itself and trigger an alarm the moment it crosses a preset threshold.
This is exactly the problem HazenFire AT-EH03 was engineered to solve.
The AT-EH03 Rod Type Temperature Detector is an explosion-proof fixed temperature detector built to deliver dependable temperature alarm output across hazardous and harsh industrial environments — backed by flameproof explosion-proof construction, an Ex d IIC T6 rating, and IP67 ingress protection.
What Makes a Temperature Detector “Explosion-Proof”?
An explosion-proof temperature detector is purpose-built for areas where flammable gas, vapor, dust, oil mist, or other hazardous substances may be present.
In these environments, ordinary electrical equipment can itself become an ignition source if it isn’t properly designed for the hazard class. That’s why any fire detection device installed in a hazardous area must use explosion-proof construction as a baseline requirement, not an upgrade.
HazenFire AT-EH03 functions as a rod-type fixed temperature alarm device: when ambient temperature reaches its preset alarm value, the detector outputs an alarm signal — immediately and reliably. This makes it ideally suited for industrial fire alarm systems requiring precise temperature monitoring at specific, identified risk points.
Ex d IIC T6: Explosion-Proof Design Built for the Harshest Sites
The defining advantage of HazenFire AT-EH03 is its explosion-proof rating: Ex d IIC T6.
This classification makes the detector suitable for hazardous industrial environments where standard heat detectors fall short — environments where a single spark from unsuitable equipment could trigger the very disaster the detector is meant to prevent.
Industries Where This Matters Most
- Oil and gas facilities
- Chemical plants
- Power plants
- Petrochemical areas
- Cable tunnels
- Oil pipe galleries
- Industrial production workshops
- Storage and processing areas with fire risk
In every one of these settings, explosion-proof design isn’t a feature — it’s the entry requirement for safe deployment.
Fixed-Temperature Alarm: Simple Logic, Reliable Results
HazenFire AT-EH03 is not a rate-of-rise heat detector — it doesn’t depend on tracking how quickly temperature climbs. Instead, it operates on a far simpler and more dependable principle: a fixed temperature threshold.
Temperature reaches preset alarm value
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Detector activates immediately
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Alarm signal outputWhy does this matter in real industrial conditions? Because short-term temperature fluctuation is the norm, not the exception, on most industrial sites. A fixed-temperature detector filters out the noise — reducing unwanted alarms caused by temporary heat spikes while staying fully responsive to genuine, sustained thermal danger.
The result: fast response exactly when it matters, at cable joints, electrical equipment, and conveyor systems where abnormal heating signals early fire risk — without the false-alarm fatigue that erodes operator trust in lesser systems.
IP67 Protection: Built for Environments That Destroy Lesser Equipment
Industrial sites are rarely clean, dry, or gentle. Dust, humidity, oil contamination, vibration, and general harsh handling are simply part of the job. HazenFire AT-EH03 is engineered to thrive in exactly these conditions.
Protection features include:
- IP67 ingress protection rating
- Sealed design
- Seismic resistance
- Corrosion resistance
- Anti-disassembly construction
Where This Durability Pays Off
- Cable trenches and cable shafts
- Belt conveyors
- Hydraulic stations
- Oil pipe galleries
- Cooling towers
- Dust collectors
- Steel plants
- Warehouses
- Power distribution rooms
HazenFire AT-EH03 — IP67-rated for dustproof, waterproof installation in even the harshest industrial areas.
Multiple Alarm Temperature Options for Every Application
Different industrial risk points demand different alarm thresholds. A cable tunnel and a high-temperature processing unit have very different “normal” operating temperatures — and your detector should reflect that reality, not force a compromise.
HazenFire AT-EH03 is available across a full range of alarm temperature settings:
| Alarm Temperature | Fahrenheit Equivalent |
|---|---|
| 60°C | 135°F |
| 85°C | 185°F |
| 90°C | 194°F |
| 105°C | 221°F |
| 125°C | 257°F |
| 140°C | 284°F |
| 162°C | 325°F |
| 232°C | 450°F |
This range gives engineers genuine flexibility to match detector sensitivity precisely to each application’s actual thermal profile — from cooler cable environments to high-heat industrial processes.
Dry Contact Output: Built for Seamless System Integration
HazenFire AT-EH03 operates as a normally-open temperature switch. When the preset temperature threshold is reached, the contact changes state and outputs a clean alarm signal — ready to connect directly into your existing fire safety infrastructure.
Compatible Integration Points
- Fire alarm control panels
- Input modules
- Alarm monitoring systems
- Release/control systems
- Industrial control systems
For engineering teams and system integrators, this dry contact compatibility removes the guesswork from specification. It’s a universal signal type that fits cleanly into virtually any fire alarm or industrial control architecture — no proprietary protocols, no integration headaches.
Where HazenFire AT-EH03 Gets Deployed
The breadth of HazenFire AT-EH03’s application range reflects just how widespread fixed-temperature risk points are across industrial facilities:
- Cable joints
- Cable trays
- Cable tunnels
- Cable trenches
- Switchgear rooms
- Transformer rooms
- Substations
- Motor control centers
- Resistor banks
- Belt conveyors
- Hydraulic stations
- Oil pipe galleries
- Steel plants
- Rolling mills
- Warehouses
- Dust collectors
- Elevated parking garages
If your facility has a point where heat builds up before fire does, HazenFire AT-EH03 belongs there.
Why Engineers Choose HazenFire AT-EH03
This isn’t a standard heat detector adapted for industrial use — it’s built from the ground up for environments where reliability, durability, and explosion-proof performance aren’t optional extras.
At a Glance
| Capability | Benefit |
|---|---|
| Fixed-temperature alarm operation | Reliable, false-alarm-resistant detection logic |
| Fast response at preset threshold | Early warning at the precise risk point |
| Ex d IIC T6 explosion-proof rating | Safe deployment in hazardous atmospheres |
| IP67 protection | Performs in dust, moisture, and harsh conditions |
| Self-resetting design | No replacement needed after activation |
| Multiple alarm temperature options | Matched sensitivity for every application |
| Dry contact output | Effortless integration with existing systems |
| Sealed, corrosion- and vibration-resistant structure | Long-term durability in demanding sites |
Catch the Heat Before It Becomes a Fire
In high-risk industrial environments, the gap between “abnormal temperature” and “active fire” can close faster than any human inspection routine can catch. HazenFire AT-EH03 closes that gap automatically — monitoring fixed-temperature risk points around the clock, in conditions where ordinary detection equipment simply isn’t rated to operate.
Reliable. Explosion-proof. Built for the points where fire actually starts.
HazenFire — Industrial Temperature Detection. Engineered for Hazardous Environments.
