Description
The Macurco GD-6 is a low-voltage, dual-relay combustible gas detector and ventilation controller for continuous monitoring of hazardous gas levels. It uses a microcomputer-based system with a pellistor sensor to detect methane, propane, or hydrogen, providing relays and 4–20 mA outputs for control and integration.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Macurco |
| Category |
Flame Safety Products |
| Part Number |
GD-6 |
| Subcategory |
Gas Detector |
| Target Gases |
Methane (CH₄), Propane (C₃H₈), Hydrogen (H₂) |
| Detection Range |
0–50% LEL |
| Sensor Type |
Pellistor, long-life (5+ years) |
| Sensor Response |
< 5 seconds |
| Outputs |
5A SPDT fan relay, 0.5A SPST alarm relay, 4–20 mA |
| Communication Options |
Modbus RTU RS-485 (with adapter), BACnet MSTP (with adapter) |
| Alarm Levels |
Configurable at 5–25% LEL |
| Fan Relay Settings |
Delay: 0–10 min; Minimum Run Time: 0–15 min; Latching or non-latching |
| Indicators |
Green power LED, 3-character LED display, buzzer (75 dB at 1') |
| Power Supply |
12–24 VAC or 12–48 VDC, max 3 W |
| Current Consumption |
23 mA standby, 50 mA (fan relay), 75 mA alarm |
| Operating Temp |
0°F to 125°F (–18°C to 52°C) |
| Humidity Range |
10–90% RH non-condensing |
| Enclosure |
Polycarbonate, IP42 rating |
| Mounting |
Standard 4x4 electrical box |
| Dimensions |
4.5 x 4 x 2.1 in (11.4 x 10.2 x 5.4 cm) |
| Certifications |
ETL Listed to UL 2075, ULC 588, CE, RoHS, REACH |
| Weight |
1 lb (0.45 kg) |
Information About GD-6
The GD-6 is a versatile combustible gas detector from Macurco, designed for industrial and commercial applications such as boiler rooms, warehouses, landfills, and battery charging stations. It can detect and display concentrations from 0–50% of the lower explosive limit (LEL), with relay outputs that can trigger exhaust fans, shut down supply lines, or activate alarms. The device mounts directly on a standard 4x4 electrical box, simplifying installation, and includes options for Modbus RS-485 and BACnet communication. With long-life sensors, configurable alarm levels, and ETL certifications, the GD-6 ensures both safety and compliance in demanding environments.
Key Features:
- Multi-Gas Detection: Selectable target gases include Methane (CH₄), Propane (C₃H₈), and Hydrogen (H₂).
- Dual Relays: Equipped with a 5A SPDT fan relay and a 0.5A alarm relay for control and notification.
- 4–20 mA Output: Provides continuous analog monitoring for integration with control systems.
- Configurable Settings: Selectable fan delay, alarm levels, latching modes, and buzzer operation.
- Fast Response: Sensor response time is less than 5 seconds for quick hazard detection.
- User-Friendly Interface: LED display, buzzer, and status indicators simplify testing and operation.
- Flexible Power Input: Operates from 12–24 VAC or 12–48 VDC, with optional Modbus or BACnet adapters.
- Certified Safety: ETL listed to UL 2075 and ULC 588, with CE compliance for international use.
The GD-6 delivers the accuracy and flexibility required for continuous combustible gas monitoring in industrial safety systems.
