Description
The GTQ-XP4000 stands out as an infrared-based explosion proof combustible gas detector with strong anti-poisoning capability, targeting long-term stable detection in complex industrial atmospheres. It features a full explosion and dust ignition proof design, ensuring safe operation in explosive hazardous areas. Adopting an infrared detection principle, it shows excellent resistance to silicon, sulfur and halogen compounds, greatly extending sensor service life and reducing maintenance frequency. It is equipped with dual-channel relay output, supporting independent high and low alarm threshold control for precise risk grading. The digital sensor assembly can be replaced without field calibration, and the IP66 protection level ensures reliable performance in harsh environments. It integrates a two-stage built-in sound-light alarm and a high-brightness digital tube display for clear alerts. A standard expansion port supports 4-20mA, HART, RS485 and relay output, enabling flexible access to various monitoring platforms. It is a high-end choice for refractory flammable gas monitoring in petrochemical and chemical industries.
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Infrared Detection Principle
Excellent resistance to silicon, sulfur and halogen compounds — extends sensor service life significantly.
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Full Explosion Proof Design
IP66 protection level with dust ignition proof construction for safe use in hazardous areas.
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Dual-Channel Relay Output
Independent high and low alarm threshold control for precise risk grading and monitoring.
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Calibration-Free Replacement
Digital sensor assembly replaceable without field calibration — reduces downtime and maintenance.
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Flexible Multi-Protocol Output
Supports 4-20mA, HART, RS485 and relay output for seamless integration with monitoring platforms.
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Industrial-Grade Reliability
High-end choice for petrochemical and chemical industries requiring refractory flammable gas monitoring.
Detector Specification
| Model | GTQ-XP4000 |
| Measuring Gas | Combustible gases (Methane, propane, isobutane, hydrogen, etc.) |
| Measuring Type | Diffusion type |
| Measuring Method | Infrared |
| Measuring Range | 0–100% LEL |
| Response Time | < 30sec / 90% scale |
| Accuracy | ±3% / Full Scale |
| Operation Mode Display | Normal / High Alarm / Low Alarm / Trouble LED |
| Measuring Value Display | Digital tube |
| Power | 24V DC nominal, 18 to 31V DC |
| Alarm Signal Output | Light and sound output / 50mA |
| Output Signal | XBUS 2/4 wire Optional expansion module: 4-20mA / RS485 / HART / NB-IoT / 4G / One-channel passive relay output / HBUS |
| Conduit Connection | Standard: 3×M26×1.5P Option: FPT3/4', NPT3/4'' |
| Mounting Type | Wall / Pole / Ceiling mount |
| Operating Temperature | -40°C ~ +70°C |
| Operating Humidity | 5 to 95% RH (Non-condensing) |
| Housing Material | Aluminum alloy |
| Dimensions | 157.5(W) × 178.4(H) × 90(D) mm |
| Explosion Proof | Ex db IIC T6 Gb |
| Certification | Refer to website |
Sensor Specification
| Sensor Type | Measuring Gas | Measuring Range | Operating Temperature | Typical Life | Response Time |
| Catalytic Type | Combustible gases | 0–100% LEL | -40 ~ +70℃ | 36 months | <15sec / 90% scale |
Sensor Features
Catalytic Type
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Linear Output: Output signal shows a good linear relationship with gas concentration, enabling precise concentration readings.
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High Stability: Minimal performance fluctuations during long-term use, ensuring reliable detection results.
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High Sensitivity & Fast Response: Quickly captures gas concentration changes and triggers timely alerts.
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Broad-Spectrum Capability: Detects most flammable gases and flammable vapors (e.g., hydrogen (H₂), methane (CH₄), propane (C₃H₈), ethanol vapors, etc.).
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Poisoning Resistance & Low Consumption: Exhibits certain tolerance to common poisoning substances (e.g., silicon, lead compounds), with a long service life and low attrition rate.
Frequently Asked Questions
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What types of combustible gases can the GTQ-XP4000 detect?
The GTQ-XP4000 is designed to detect a wide range of combustible gases, including methane (CH₄), propane (C₃H₈), isobutane, hydrogen (H₂), ethanol vapors, and most other flammable gases and vapors within the 0–100% LEL measuring range.
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Why does the GTQ-XP4000 use an infrared detection method instead of catalytic?
The infrared detection method provides excellent resistance to poisoning by silicon, sulfur, and halogen compounds — substances that commonly degrade catalytic sensors. This significantly extends sensor service life, reduces maintenance frequency, and ensures stable long-term detection in complex industrial environments.
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Can the sensor be replaced without performing field calibration?
Yes. The GTQ-XP4000 features a digital sensor assembly that can be replaced without field calibration. This design minimizes operational downtime and simplifies maintenance procedures, making it particularly practical for hazardous or remote installation sites.
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What output signal options are available for integration with monitoring systems?
The GTQ-XP4000 supports XBUS 2/4 wire as a standard output and offers optional expansion modules including 4-20mA, RS485, HART, NB-IoT, 4G, one-channel passive relay output, and HBUS. This flexibility enables seamless integration with a wide variety of industrial monitoring and control platforms.
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What is the explosion proof certification of the GTQ-XP4000 and where can it be used?
The GTQ-XP4000 carries an Ex db IIC T6 Gb explosion proof certification, covering the highest gas group classification (IIC, including hydrogen atmospheres). It is suitable for use in Zone 1 and Zone 2 explosive hazardous areas commonly found in petrochemical, chemical, oil & gas, and other industrial environments.
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What are the operating temperature and environmental protection ratings of the GTQ-XP4000?
The GTQ-XP4000 operates reliably across an extremely wide temperature range of -40°C to +70°C, with an operating humidity of 5–95% RH (non-condensing). Its IP66 protection rating ensures effective resistance against dust ingress and powerful water jets, making it suitable for harsh outdoor and industrial environments.