Measurement ranges from 0.01 percent to 100 percent O2 in gases Explosion-proof and flameproof enclosure with weatherproof protection allows sensor to be remotely mounted at the measurement point Push-button, single or dual gas calibration Compact, rugged sensor design with no moving parts provides long term reliability and trouble-free operation Dual-bridge measurement circuit compensates for variations in background gas composition Unique dual-chamber, temperature-controlled cell design provides resistance to contamination and flow fluctuation Computer-enhanced accuracy of 1 percent of span and linearity of better than 0.5 percent of span