Detcon Model FP-424C sensors are designed to detect and monitor Combustible Gas in air over the range of 0-100% LEL (lower explosive limit). The sensor assembly consists of a matched pair catalytic bead sensor in a stainless steel housing, a plugin control transmitter circuit, a base connector board and an explosion proof enclosure. SPECIFICATIONS Sensor Type Matched pair catalytic bead Measurement Range 0-100% LEL (lower explosive limit) Combustible Gas Accuracy/Repeatability ±3% 0-50% LEL ±5% 50-100% LEL Response/Clearing Time T50 <10 seconds T90 <30 seconds Zero Drift <5% per year Operating Temperature -40°F to +167°F; -40°C to +75°C Operating Humidity 0-99% RH non-condensing Output Linear 4-20 mA DC Input Voltage 11.5-28 VDC Power Consumption 2.1 watts @ 24 VDC (order by part number 964-525410-100) _ CSA-NRTL Approved: Class I, Division 1, Groups B, C, & D _ Plug-in field-replaceable transmitter and sensor _ Integral sensor fault diagnostics _ Long sensor life expectancy: averaging longer than five years in harsh offshore drilling/production environment _ High resistance to poisons such as sulfides, chlorides, silicon-based contaminants etc. _ Low power consumption (less than 2 watts versus 7+ watts on competitive brands)