The Net Safety M22 Millennium II is a dual-channel universal transmitter that supports mixing and matching of toxic and combustible gas sensors on a single unit. SMART sensors are pre-calibrated and automatically recognized by the transmitter, which uploads their specific configuration profile. Sensor and transmitter communicate digitally, providing stable, accurate readings even over long separation distances (up to 2000 ft).

The M22 features a full graphic OLED display readable in all lighting conditions, with multilingual menus for simple setup and calibration. It offers the lowest power consumption in its class, full diagnostics with event and data logging, and multiple communication protocols including HART. The unit operates from -67 to 185°F and is approved to international hazardous area safety standards. It supports Nano-Enhanced Metal Oxide Semiconductor (NE-MOS) toxic gas sensors, poison-resistant catalytic bead sensors with SensorGuard, and infrared sensors with dual-beam design.