Product Overview
The GD200-W/M-D is a rugged, explosion-proof multi-gas monitor designed for continuous safety monitoring in hazardous industrial environments. It simultaneously detects 1 to 4 gases-including combustibles (e.g., CH₄, LEL), toxic gases (e.g., H₂S, CO, O₂, NH₃), and other target vapors-using field-proven electrochemical, catalytic, or infrared sensor technologies. With support for over 50 pre-calibrated, plug-and-play sensor modules, the system enables flexible configuration and rapid deployment across diverse applications.
Housed in a die-cast aluminum enclosure rated Ex d IIC T6 and IP66, the detector delivers stable, temperature-compensated readings with high sensitivity and reliable performance-even under extreme conditions (–30°C to +65°C, up to 95% RH). Its robust design meets the demands of confined space entry, process area monitoring, and critical infrastructure protection, where safety, durability, and ease of maintenance are non-negotiable.
⚠️ Note: Sensor replacement requires zero/span verification per safety best practices. Full calibration is recommended after module change.
Key Features
High-Reliability Sensing Technology
Utilizes field-proven electrochemical, catalytic bead, and infrared sensors from leading global suppliers-delivering fast response (T90 ≤30 s) and stable measurement accuracy (±3% FS typical).
Modular, Flexible Gas Configuration
Supports 1 to 4 gases in any combination via hot-swappable sensor modules. Each module is pre-calibrated at the factory to minimize setup time-though zero/span verification is recommended after replacement per safety best practices.
Seamless System Integration
Standard RS-485 output with Modbus RTU protocol and two independent relay outputs (for alarms or control) enable direct connection to PLCs, DCS, or safety systems. Optional 4–20 mA output available for analog integration.
Safe, Non-Contact Operation via Infrared Remote
Perform configuration, calibration, and diagnostics without opening the enclosure-critical in hazardous areas. Supports multi-point calibration (up to 4 levels) for enhanced accuracy across the measurement range.
Ruggedized for Harsh Industrial Environments
Die-cast aluminum housing certified to Ex d IIC T6 (or IIB T6, as applicable) and rated IP66-fully protected against dust, water jets, and explosive atmospheres. Operates reliably from –30°C to +65°C at up to 95% RH.
Note
Full calibration after sensor replacement is advised to ensure compliance with occupational safety standards (e.g., OSHA, ISO 10156).
Technical parameter
|
Category |
Parameter |
|
Display Mode |
Color LCD screen |
|
Detection Method |
- Diffuse (standard) |
|
Zero Drift |
≤ ±1% F.S. / year |
|
Response Time (T₉₀) |
≤ 30 s |
|
Recovery Time |
≤ 60 s |
|
Operating Pressure Range |
86–106 kPa (standard atmospheric pressure; not suitable for pressurized lines) |
|
Alarm Method |
Audible and visual alarm (sound + alarm light); optional |
|
Installation Method |
Wall-mounted |
|
Indication Error |
≤ ±3% F.S. |
|
Protection Rating |
IP66 (dust-tight and protected against powerful water jets) |
|
Signal Output |
- 4-wire RS-485 (standard) |
|
Usage Environment |
- Temperature: –30 °C to +65 °C |
Core Application Scenarios
Confined Space Entry & Underground Operations
In enclosed environments such as tanks, silos, sewers, utility tunnels, and underground vaults, oxygen deficiency, toxic gas accumulation (e.g., H₂S, CO), or combustible gas leaks pose immediate life-threatening risks. The SafeGuard X4 enables real-time, multi-gas monitoring during entry and work procedures-ensuring compliance with OSHA/GB standards for confined space safety. Its IP66 rating and infrared remote control allow safe operation without opening the enclosure in hazardous zones.
Oil, Gas & Chemical Processing Facilities
From wellheads and compressor stations to chemical storage yards and loading terminals, continuous monitoring of methane (LEL), H₂S, CO, and oxygen is critical for personnel safety and process integrity. The detector's Ex d IIC T6 certification, modular sensor design, and Modbus output support seamless integration into plant-wide safety systems-providing early warning of leaks, ventilation failures, or off-spec gas conditions.
Municipal Infrastructure & Utility Tunnels
Gas hazards in urban underground networks-including natural gas distribution lines, wastewater treatment plants, and utility corridors-require reliable, low-maintenance monitoring. The unit's rugged IP66/Ex d design withstands high humidity, dust, and temperature swings, while its wall-mounted form factor and 4–20 mA/RS485 outputs enable long-term deployment in remote or unattended locations such as pump stations and pipe galleries.
Why choose our explosion-proof four in one gas detector?
Reliable Performance Where It Matters Most
Equipped with high-stability sensors, the detector delivers a fast T90 response of ≤30 seconds and typical measurement accuracy within ±3% of full scale-ensuring timely alerts for combustible, toxic, and oxygen-deficient atmospheres in safety-critical environments.
Minimized Downtime, Simplified Maintenance
Hot-swappable sensor modules allow rapid replacement in the field. While each module is factory pre-calibrated to reduce setup time, zero/span verification is supported via infrared remote control-enabling safe, non-contact calibration without opening the enclosure, even in Zone 1 hazardous areas.
Built for Seamless System Integration
Standard RS-485 (Modbus RTU) and two programmable relay outputs provide direct connectivity to fire panels, PLCs, or central monitoring systems. Optional 4–20 mA output, integrated pump (for active sampling), and audible/visual alarms offer flexibility for diverse site requirements.
Engineered for Extreme Conditions
Housed in a rugged die-cast aluminum enclosure certified to Ex d IIC T6 (or IIB T6 as applicable) and rated IP66, the unit operates reliably in temperatures from –30°C to +65°C and humidity up to 95% RH-resisting dust, water jets, and explosive gas atmospheres.
Quick to Install, Easy to Deploy
Compact and lightweight (<1.8 kg), the detector features a standard wall-mount design with M20×1.5 cable glands and a wide DC 12–30 V power input, simplifying installation in new or existing facilities-even in space-constrained locations.
Proven Across High-Risk Industries
Trusted in applications where safety cannot be compromised:
Confined space entry (tanks, sewers, vaults)
Oil & gas production, chemical storage, and loading operations
Municipal utility tunnels, wastewater plants, and power generation sites
Designed not just to detect-but to protect.
Note: Sensor replacement requires verification of zero and span points per occupational safety guidelines. Full calibration ensures compliance with local regulations.
FAQ
Q1: How many gases can the detector monitor at the same time?
A: The unit supports 1 to 4 gases simultaneously, with flexible combinations of combustible (LEL), toxic (e.g., H₂S, CO, NH₃), and oxygen sensors. Over 50 plug-and-play sensor modules are available for configuration.
Q2: Is sensor replacement straightforward in the field?
A: Yes. Sensors are designed as hot-swappable modules for quick replacement. Each module is factory pre-calibrated to reduce setup time. However, per safety best practices, a zero and span verification is recommended after installation to ensure measurement accuracy and regulatory compliance.
⚠️ Note: "Calibration-free" operation is not advised for safety-critical gas detection. Regular validation is required by standards such as OSHA 1910.146 and GB 3836.
Q3: What output signals are available?
A: The detector includes:
Standard: RS-485 (Modbus RTU) + two independent relay outputs (programmable for alarms or control)
Optional: 4–20 mA analog output, integrated pump (for active sampling), and audible/visual alarm beacon
This ensures compatibility with PLCs, DCS, fire panels, and central monitoring systems.
Q4: What are the explosion-proof and ingress protection ratings?
A: Explosion protection: Certified to Ex d IIC T6 (or IIB T6, depending on sensor configuration) - suitable for Zone 1 / Class I Div 1 hazardous areas
Ingress protection: IP66 - fully dust-tight and protected against powerful water jets
Always refer to the product certification label for the exact rating of your unit.
Q5: In what types of environments can it operate?
A: Designed for harsh industrial conditions:
Temperature: –30°C to +65°C
Humidity: 0–95% RH (non-condensing)
It is widely deployed in confined spaces, chemical plants, oil & gas facilities, utility tunnels, and power stations-anywhere reliable, continuous gas monitoring is required.
Q6: What are the detection accuracy and response time?
A: Typical accuracy: ≤ ±3% of full scale (varies slightly by gas type and sensor technology)
Response time: T90 ≤ 30 seconds under standard conditions
Performance is temperature-compensated to maintain stability across the operating range.
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