Stand Alone Combustible Natural Gas Detector
£61.25 (inc VAT: £73.50)
Summary
The Zeta ZG-100N is a standalone combustible gas detector specifically calibrated for natural gas detection, designed with the same dimensions as a standard 2-gang fitting for versatile installation options. The detector can be installed either surface mounted with its own backbox or semi-flush mounted using a standard recessed box, providing flexibility for both new installations and retrofit applications in domestic and commercial premises.
Featuring a built-in bar graph display, the ZG-100N shows current natural gas levels as percentage Lower Explosive Limit (%LEL) readings, providing clear visual indication of gas concentration. The detector operates a two-stage relay output system, triggering at first alarm level (10%LEL) and second alarm level (25%LEL), with an additional 5V alarm output capable of supplying 200mA for external signaling devices or control equipment.
With flexible power options accepting either 230V AC mains or 9-28V DC supply, the ZG-100N includes power, fault and alarm LED indicators, plus an integrated control button for alarm muting and system reset. The loud 85dB audible alarm ensures alerts are heard throughout the protected area, while the fast response time of under 30 seconds provides rapid detection of natural gas leaks with a sensitivity of 4400ppm.
Features
- Calibrated specifically for natural gas detection and monitoring
- Standard 2-gang fitting dimensions for easy installation compatibility
- Surface or semi-flush mounting options with appropriate backbox
- Dual power input: 230V AC at 50/60Hz or 9-28V DC supply
- Built-in bar graph display showing gas levels as %LEL readings
- Two-stage relay output: 10%LEL first alarm, 25%LEL second alarm
- 5V alarm output providing 200mA for external devices
- 85dB audible alarm at 3 meters distance
- Power, fault and alarm LED indicators
- Test and silence function via control button
- Mute function via control button press
- Reset function via 5-second button press and hold
- Fast response time of under 30 seconds
- Operating temperature range: 0°C to 50°C
- Maximum humidity tolerance: 95% RH non-condensing
- Low quiescent current consumption: 140mA
- Natural gas sensitivity: 4400ppm
FAQs
What type of gas does the ZG-100N detect?
The ZG-100N is specifically calibrated for natural gas detection with a sensitivity of 4400ppm. Natural gas is lighter than air and typically rises when leaked, making this detector ideal for installation near ceiling level in properties using natural gas for heating, cooking or other applications. For LPG detection, the alternative ZG-100L model should be used instead.
Can the ZG-100N be powered from both AC and DC sources?
The ZG-100N accepts either 230V AC mains supply at 50/60Hz or 9-28V DC supply as alternative power options, but these are not intended for simultaneous connection. Users should select the appropriate power source based on their installation requirements, with AC mains typically used in standard domestic settings and DC supply often preferred in systems with battery backup capabilities or integrated fire alarm installations.
What do the two-stage relay outputs control and when do they activate?
The ZG-100N features a two-stage relay output system that activates at different natural gas concentration thresholds. The first alarm level triggers at 10%LEL (Lower Explosive Limit) to provide early warning of gas presence, while the second alarm level activates at 25%LEL to indicate more serious gas accumulation requiring immediate action. These relay outputs can be connected to external control systems, ventilation equipment, gas shut-off valves or building management systems.
Where should the ZG-100N be installed for optimal natural gas detection?
Since natural gas is lighter than air, the ZG-100N should be installed near ceiling level in areas where natural gas appliances are located or where gas leaks could occur. The detector’s standard 2-gang fitting dimensions allow installation either surface mounted using its own dedicated backbox or semi-flush mounted using a standard recessed electrical box. Avoid installing in locations exposed to excessive moisture, direct airflow from ventilation systems, or extreme temperatures outside the 0°C to 50°C operating range.
What is the %LEL reading and why is it important?
The %LEL (percentage Lower Explosive Limit) reading indicates the concentration of natural gas present as a percentage of the minimum concentration required for ignition. The built-in bar graph display provides continuous visual monitoring of gas levels, allowing users to see gradual increases in concentration and take preventative action before dangerous levels are reached. The ZG-100N’s alarm system triggers at 10%LEL for early warning and 25%LEL for urgent response, providing multiple layers of protection.
Specifications
- Model Number: ZG-100N
- Part Number: 47-405
- Gas Type: Natural Gas
- Supply Voltage: 230V AC at 50/60Hz or 9-28V DC
- Quiescent Current: 140mA
- Start-Up Current: 220mA
- Alarm Current: 500mA (excluding alarm output)
- Alarm Output: 5V DC at 200mA maximum
- Buzzer Output: 85dB at 3 meters
- Operating Temperature: 0°C to 50°C
- Maximum Humidity: 95% RH non-condensing
- Response Time: Less than 30 seconds
- Sensitivity: 4400ppm (Natural Gas)
- First Alarm Level: 10%LEL
- Second Alarm Level: 25%LEL
- Dimensions (W×H×D): 150mm × 90mm × 70mm
- Weight: 1kg
- Mounting Options: Surface mount or semi-flush mount
- Relay Outputs: Two-stage relay operation
- Display Type: Bar graph LED display
Downloads
- Datasheet (Adobe PDF)
Additional information
| Weight | 1 kg |
|---|---|
| Detection Type | |
| Power |