Fixed Industrial Gas Detector — Multi-Gas (H2S, CH4, LPG, CO, O2, Cl2)

Wall-mounted multi-gas detector that monitors combustible and toxic gases with a siren alarm and three relays for industrial control systems.

11,909.00 ฿
Shipping calculated separately
Lead time: 2–4 weeks

MOQ: 10

This fixed gas detector mounts to a wall in a kitchen, plant room or process area and watches the air for combustible and toxic gases — H2S, methane (CH4), LPG, carbon monoxide (CO), chlorine (Cl2), oxygen depletion (O2), VOCs, CO2 and refrigerants among them. When a reading crosses its alarm point it drives a built-in siren and switches any of three on-board relays, so it can trip an extractor, cut a gas valve or signal a BMS without extra hardware.

It runs on a 24 V DC supply drawing under 3 W and reports over a 4–20 mA loop or RS485 power bus, which drops it straight into most control systems. Sampling is by natural diffusion, so there is no pump to service, and the IP66/IP67 stainless-steel and aluminum housing stands up to washdown and dust. An infrared remote lets a technician check parameters and recalibrate without opening the enclosure.

  • Catalytic, electrochemical and infrared sensor options cover flammable, toxic and CO2/refrigerant gases
  • Fast response: T90 ≤20s for flammable gases, ≤30s for O2/CO/H2S, ≤60s for others
  • Three relays plus 4–20 mA or RS485 output for valves, fans and alarm panels
  • IECEx and ATEX certified for hazardous-area installation

Specifications

Material
Stainless Steel, Aluminum Alloy
Power
3 W
Voltage
DC 24V ±6V
Warranty
1 Year
Certifications
IECEx, ATEX
Customization
OEM, ODM
Model
GTQ-BS03
Target gases
Combustible gas, toxic gas, O2, VOC, CO2, Freon (H2S, CH4, LPG, CO, Cl2)
Sensor type
Catalytic, electrochemical, infrared
Sampling method
Natural diffusion
Alarm mode
Siren
Relays
3
Signal output
4-20mA or RS485 power bus
Response time (flammable)
T90 ≤20 s
Response time (O2/CO/H2S)
T90 ≤30 s
Response time (other gases)
T90 ≤60 s
Alarm deviation
±3% of alarm points
Ingress protection
IP66/IP67
Accuracy class
Standard accuracy
Remote control
Infrared

Frequently asked questions

Which gases does this fixed detector monitor?

Depending on the sensor fitted, it detects combustible and toxic gases including hydrogen sulfide (H2S), methane (CH4), LPG, carbon monoxide (CO), chlorine (Cl2) and oxygen (O2), plus VOCs, CO2 and refrigerants. Specify the target gas when ordering so the right catalytic, electrochemical or infrared sensor is installed.

How does the detector connect to a control system?

It outputs a standard 4–20 mA current loop or communicates over an RS485 power bus, and carries three on-board relays. The relays can trip an extractor fan, close a solenoid gas valve or signal a building management system directly, while the built-in siren alerts staff on site.

Can it be installed in a hazardous area?

Yes. The unit is IECEx and ATEX certified and housed in a stainless-steel and aluminum enclosure rated IP66/IP67 against dust and water jets, so it suits washdown kitchens, plant rooms and demanding industrial environments.

What power supply does the detector need?

It runs on 24 V DC (±6 V) and draws no more than 3 W. Sampling is by natural diffusion, so there is no pump to power or maintain.

How is the detector calibrated?

An infrared remote control lets a technician check parameters and recalibrate the detector without opening the housing, which keeps the enclosure's IP66/IP67 seal intact during routine service.

How fast does it respond to a leak?

Response time is T90 ≤20 seconds for flammable gases, ≤30 seconds for oxygen, CO and H2S, and ≤60 seconds for other gases, with an alarm deviation of ±3% of the set alarm points.

Is shipping included in the price?

For in-stock items — anything you can add to the cart — shipping is included in the listed price. For made-to-order items, delivery is either free (marked on the product page) or calculated when you place your order, based on destination and volume.

How long does delivery take?

In-stock items typically arrive within one to three weeks. Made-to-order items take three to six weeks, since we work directly with manufacturers and need time for production and logistics before shipping. Your assigned manager confirms a more precise estimate once your order is placed. Please note we can't be responsible for delays caused by customs clearance in the destination country.

Are import duties and taxes included?

In most cases, yes — we aim to ship Delivered Duty Paid (DDP), which means duties and import taxes are handled so you don't face extra charges on delivery. In rare cases we may ship Delivered Duty Unpaid (DDU), where you would settle import charges directly with the carrier — but only when agreed with you in advance.

Do your products come with a warranty?

Yes. Most of our equipment comes with a one-to-two-year manufacturer's warranty covering factory defects and technical faults under normal use; the specific term is stated on each product page. If a defect appears, we arrange a replacement or refund in line with our Exchange & Return Policy, and our team guides you through the claim step by step.

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