Gas detector SA-5100D-CH4

methaneNDIRoptical

Optical NDIR sensor technology Range of sensitivity 0-5000 PPM CH4 Minimum detectable level 100 ppm Built-in Color graphic HMI Embedded 12 month 1/m data logging Output - Modbus RTU 9600 bps No periodic calibration required Annual bump test and zero recommended > 10 year life expectancy Safeguard Analytics Model IR-5100D-CH4 is an infrared based gas sensor designed to continuously detect and monitor combustible hydrocarbon gas in ambient air. Hydrocarbon gases are detected and measured using the non-dispersive infrared radiation absorbance technique as a source signal. Model IR-5100D-CH4 infrared gas detection sensors consist of a light source and a dual channel pyro-electric detector mounted in a common optical chamber with an external retroflector to provide an open gas sensing chamber. Each dual channel detector is fitted with two optical filters. One channel functions as a reference detector and is fitted with a filter where there are no particular gas absorbance lines. The other channel functions as an active detector and is fitted with a filter that lets through IR light in the wavelength of the target gases – hydrocarbons typically absorb in the 3.25-3.4 micron region. As gas enters the optical chamber less of the source radiation reaches the active detector while the reference detector is unchanged. This differential in light reaching the pyro-electric detectors is the measurement signal.