The Pulsar+ single-gas detector from MSA Instrument Division features a gas concentration display and replaceable sensor and battery. The unit detects CO, H2S or O2 and is ideal for use in confined space monitoring for a variety of industrial applications. The single-gas detector includes a simplified autocalibration at the push of a button, a large display, a resistance to water and dust penetration, a 123-type lithium battery, leak-proof, stainless steel button sensors and a triple alarm system featuring an audio, visual and optional vibrating alarm. Mine Safety Appliances Co. Instrument Division