• Continuous monitoring of methane concentrations
• Long term stability - infrequent calibration
• Selection of sensors to match the range and accuracy of your application - 0- 5% , 0 to 10%, 0 - 30% , 0 - 100% methane
• Low maintenance
• Audible and visual alarms and relays signals
• East to read 4 digit LCD display
• ISO9002
• (not rated intrinsically safe)

Introduction
The Guardian gas monitor uses a special non dispersive dual wavelength infra red sensor unit which has no moving parts. This ensures the long term stability of the instrument without the need for frequent re-calibration. The gas is metered into the measuring system with a built in sample pump. Remote sampling can be performed by connecting a 5 mm diam sample tube to the gas inlet. This tube can be up to 90 feet long. The instrument is enclosed inside a tough plastic enclosure rated IP54 against the ingress of water and dust further increasing its long term reliability. The two independent alarm levels are set on the front panel and other options for analog output, alarm designation, buzzer and flow indication are set on on a dipswitch.

Applications of
CH4 monitoring