The RKI M2A-XL is an explosion-proof fixed gas transmitter in a cast-aluminum NEMA 4X housing, certified Class I Division 1 Groups B, C, D for flammables, CO, H2S, O2, and CO2, with Class I Division 2 coverage for toxic gases. An OLED display shows live readings locally, while three 5A Form C relays and both 4-20mA and Modbus RTU (RS-485) outputs integrate directly into a control system.

RKI builds the M2A-XL around catalytic, galvanic, electrochemical, and IR sensor technology to cover LEL, O2, H2S, CO, CH4, HCN, arsine, and a wide range of other toxic gases — the configurations listed here cover the most common single-gas sensor options; other gas types and remote-detector/horn-strobe accessory kits are available by quote.