Oil, gas and chemical plants are not ordinary industrial environments. In many areas, flammable gas, vapor or combustible dust may exist during production, storage, loading, unloading or maintenance operations. When a fire alarm or emergency signal is triggered, personnel must receive a clear warning immediately.
In these hazardous areas, a standard fire alarm sounder or beacon is not always suitable. The alarm device itself must be designed for explosive atmospheres and installed according to hazardous-area requirements. This is why an explosion-proof audible and visual alarm is commonly used in oil refineries, gas facilities, petrochemical plants, chemical processing workshops, fuel storage areas and hazardous warehouses.
The ANWETECH AT-ESS01 is an ATEX-certified explosion-proof audible and visual alarm designed to provide both sound and light warning in hazardous industrial sites. It combines a fire alarm tone with a visible LED alarm signal, helping personnel recognize the emergency condition quickly and take action according to the site emergency procedure.
An explosion-proof audible and visual alarm is a fire alarm notification device used in hazardous areas. It provides two warning methods at the same time:
Audible warning: a fire alarm tone to alert personnel by sound.
Visual warning: a flashing or visible warning light to alert personnel by sight.
This dual-warning method is especially important in oil, gas and chemical plants. Some areas may be noisy because of pumps, compressors, process equipment or ventilation systems. Other areas may have long corridors, tanks, outdoor structures or separated process zones where a visible alarm helps improve emergency awareness.
AT-ESS01 is a non-addressable explosion-proof audible and visual alarm device. When the connected fire alarm controller or control circuit activates the alarm circuit, the device outputs a fire alarm tone and a visible LED warning signal. It can also work with manual call points to form a simple audible and visual alarm system.
Oil, gas and chemical plants may include different hazardous zones depending on the type of material, ventilation condition, process risk and installation location. The AT-ESS01 is designed for hazardous locations where explosion-proof alarm notification is required.
Typical applicable areas include:
Zone 1 and Zone 2 hazardous areas with explosive gas atmospheres.
Group IIA, IIB and IIC explosive gas atmospheres.
Temperature classes from T1 to T6.
Zone 21 and Zone 22 hazardous areas with combustible dust atmospheres.
Explosion-proof fire alarm systems in industrial sites requiring audible and visual warning.
This makes the AT-ESS01 suitable for many high-risk industrial applications, including oil depots, refinery units, gas compressor stations, petrochemical production areas, chemical storage rooms, paint and coating workshops, hazardous material warehouses and combustible dust areas.
A standard fire alarm sounder beacon may work well in commercial buildings, offices or general industrial areas. However, in a hazardous area, the alarm device must not become an ignition risk.
Oil, gas and chemical plants usually require equipment selected according to hazardous-area classification. If flammable gas, vapor or combustible dust may be present, the notification device should be designed with explosion-proof protection and installed using approved methods.
The AT-ESS01 uses an explosion-proof structure and stainless steel housing, making it suitable for demanding industrial environments. Its explosion-proof marking is Exdib IIC T6 / ExtD A21 IP65 T85°C. The product is intended for gas and dust hazardous areas where audible and visual warning is required.
In a typical fire alarm system, the fire alarm control panel, releasing panel or control circuit receives a signal from a detector, manual call point or other initiating device. Once the alarm output is activated, the AT-ESS01 receives the DC24V activation signal through the alarm circuit.
During alarm operation:
The fire alarm controller or control circuit sends an activation signal.
The AT-ESS01 outputs a fire alarm tone.
The LED visual alarm provides a visible warning with 360-degree visibility.
Personnel on site are alerted to evacuate, check the alarm source or follow the plant emergency procedure.
This working logic is simple and practical for industrial sites. The product does not require addressable communication. It is used as a non-addressable audible and visual alarm device connected to a DC24V alarm circuit.
For oil, gas and chemical plants, engineers usually check several technical points before selecting an alarm device. AT-ESS01 provides the following key specifications:
Operating voltage: DC24V.
Alarm current: ≤250mA.
Sound intensity: 90dB–110dB.
Sound pattern: fire alarm tone.
Visual alarm: ultra-bright LED light source with 360-degree visibility.
Protection rating: IP65.
Operating temperature: -20°C to +50°C.
Relative humidity: ≤95%, non-condensing.
Cable entry thread: G3/4 external thread or customized.
Housing: stainless steel housing.
Weight: 2.4kg.
These specifications are important because hazardous industrial sites often require stable operation, clear alarm output, environmental protection and mechanical strength. The stainless steel housing also provides strong corrosion resistance, which is useful in chemical plants, coastal industrial areas and petrochemical environments.
Explosion-proof alarm devices must be installed according to project drawings, approved installation methods and applicable hazardous-area requirements. Before installation, engineers should confirm the product model, supply voltage, installation method and cable entry requirement.
For AT-ESS01, the installation team should check:
The model is AT-ESS01.
The supply voltage is DC24V.
The selected installation method is suitable for the site.
The cable entry thread is G3/4 external thread or customized.
The housing, red lens, cable entry and junction box are not damaged before installation.
The product supports wall-mounted, floor-standing / floor-mounted and ceiling-mounted installation methods. For outdoor installation, ceiling mounting is not recommended. The correct installation method should always follow the project design and hazardous-area installation requirements.
AT-ESS01 is designed for DC24V alarm circuit connection. The wiring method is straightforward, but the junction box must be properly closed after wiring to maintain the required protection.
The general wiring steps are:
Unscrew the junction box cover.
Connect the DC24V cable to the terminal blocks.
The DC24V cable connection is non-polarized according to the product manual.
After wiring, close and tighten the junction box cover.
The operating voltage is DC24V, and the alarm current is ≤250mA. In a project, the fire alarm control panel output capacity, cable distance, voltage drop and number of connected alarm devices should be checked during system design.
In oil and gas projects, explosion-proof audible and visual alarms are commonly used in areas where personnel need immediate emergency warning. These may include:
Oil storage tank farms.
Fuel loading and unloading areas.
Gas compressor stations.
Pump stations.
Refinery process areas.
Pipeline stations.
LPG or LNG related facilities.
Hazardous maintenance areas.
In these sites, the alarm must be clearly visible and audible. The 90–110dB sound output and 360-degree LED warning help provide strong notification coverage. The IP65 rating and stainless steel housing also support use in industrial environments where dust, moisture and corrosion may be present.
Chemical plants often contain flammable liquids, solvents, vapors or dust. In these facilities, an explosion-proof sounder beacon can be used as part of the fire alarm and emergency warning system.
Typical locations include:
Chemical production workshops.
Solvent storage rooms.
Paint and coating production areas.
Hazardous material warehouses.
Mixing and filling areas.
Dust collection or powder handling areas.
Explosion-proof fire alarm notification zones.
In these applications, the alarm device must be selected based on the site hazardous classification. AT-ESS01 is suitable for explosive gas atmospheres and combustible dust atmospheres, making it a practical solution for many chemical plant warning applications.
After installation, the alarm device should be tested before being put into service. The purpose of testing is to confirm that the device is securely installed, correctly wired and able to produce clear sound and visible light output.
Recommended testing steps include:
Confirm that the device is securely installed.
Confirm that the wiring is connected and the junction box cover is closed.
Apply an approved test activation signal from the fire alarm controller or test circuit.
Check that the audible signal can be heard clearly.
Check that the visual alarm is clear and not obstructed from the required viewing direction.
For oil, gas and chemical plants, testing should be included in the fire alarm system commissioning procedure and regular maintenance schedule.
Routine maintenance is important for alarm devices installed in hazardous industrial sites. Dust, corrosion, vibration or environmental exposure may affect long-term performance if the device is not inspected.
For AT-ESS01, routine maintenance should include:
Keep the light lens clean.
Check the stainless steel housing for corrosion, damage or loosening.
Check the cable entry and mounting parts during routine inspection.
Test audible and visual operation according to the fire alarm system maintenance schedule.
Do not modify the flameproof structure or cable entry without approval.
Maintenance should be carried out by qualified personnel according to site safety procedures and hazardous-area requirements.
The ANWETECH AT-ESS01 is designed for projects that require reliable explosion-proof audible and visual alarm notification in hazardous areas. It is suitable for oil, gas, petrochemical and chemical plant applications where both sound and light warning are needed.
Main advantages include:
ATEX-certified explosion-proof design.
Suitable for Zone 1, Zone 2, Zone 21 and Zone 22 hazardous areas.
Applicable for IIA, IIB and IIC gas groups.
DC24V operation for fire alarm circuit connection.
90–110dB fire alarm tone.
Ultra-bright LED light source with 360-degree visibility.
IP65 protection rating.
Stainless steel housing for corrosion resistance.
Compatible with fire alarm control panels from domestic and international manufacturers.
Can work with manual call points to form a simple alarm system.
For oil, gas and chemical plants, the AT-ESS01 provides a practical solution for hazardous-area fire alarm notification. It helps improve site safety by giving personnel a clear audible and visual warning during fire alarm or emergency activation.
