CH4 (Methane) Guardian Gas Monitor
Gas Monitors

CH4 (Methane) Guardian Gas Monitor

Model Number
Guardian NG / Guardian NG DC


Standard Lead Time
2-4 weeks

The Guardian NG analyzers are fast accurate and reliable infrared gas monitors offering continuous sampling, high accuracy, and display of target gas concentrations.

Suitable for a wide variety of applications, these wall-mounted monitors can detect gases from sampling points up to 30 meters away using the integral sampling system.

Our Guardian instruments are easy-to-install, stand-alone products that require minimum setup. The Guardian is supplied with LCD and digital alarm set-point controls, housed in a robust plastic IP54-rated enclosure to prevent the ingress of particulates and water.

Part Number & Ranges:

P/N: S200910-S | 0-1% CH4

P/N: S200920-S | 0-5% CH4

P/N: S200930-S | 0-10% CH4

P/N: S200940-S | 0-30% CH4

P/N: S200950-S | 0-100% CH4

P/N: S200960-S | 0-100% CH4 (in biogas)

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Key Specifications

+/- 4% Full Scale ( +/- 2% analyzer & +/- 2% Certified calibration gas)
Zero Stability
+/- 2% of 12 months
Sampling Pump | Flow Rate
Internal | 1 L/min
Operating Pressure
800 - 1150 mbar (sampling from ambient or a free gas flow)
0/4-20mA Analog | 1 relay 8A 250V AC resistive load, 8A 24V DC resistive load. The freely programmable alarm activates the relay and can trigger an audible alarm.
Warm Up Time
1 minute
Power Supply
90 - 260 VAC Guardian NG | 24VDC (18 to 36V) Guardian NG DC | 25 Watt max.
Response Time
Dependant on tubing length on sample input, T90 @ 4 seconds best performance.
Operating Temperature
Recommended annually

Available Accessories

Available Accessories

No accessories are currently available for this item.
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