Microthermal conductivity gas leak detector. Reading in cc/sec, g/yr, mg/m3 or ppm. Detects most gases however particularly suited to ammonia, argon, butane, helium, hydrogen & SF6. Calibrated against Helium. Battery Life 40h. Sensitivity (cc/sec) He 1x10-5, CH4 5x10-5, R12 5x10-5, Ar 1x10-4. Accuracy 5% of displayed reading + 1 digit. Response 1s. Flowrate 2cc/min. Operating -20~60DegC.