INDUSTRY-LEADING XCELL SENSOR: Each XCell Sensors is built with an embedded ASIC microchip that drives the sensor and converts its output to a digital signal, which enables faster responses. MULTI-GAS DETECTION: This replacement sensor is designed for ALTAIR 4X/5X Multi-Gas Detectors, which are equipped to measure multiple gases in one device with virtually no cross-channel interference DURABLE AND STABLE: Immune to pressure spikes, XCell sensors have a life of over four years. Additionally, all of our replacement sensors stay functional even in temperatures as low as -40°C ACCURATE DETECTION: XCell sensors perform real-time environmental corrections, measuring oxygen levels within a range from 0% to 30% concentration and detect a 0.1% change in oxygen concentration GLOBAL LEADER IN SAFETY: Established in 1914, MSA Safety Incorporated is the global leader in the development, manufacture and supply of safety products that protect people around the world