The Datatest Model DT3006 Oxygen/CO analyzer is a microprocessor based instrument. It has a zirconia sensor for oxygen and an electrochemical sensor for carbon monoxide. Excellent trim control and boiler safety instrument with great reliability and stability thanks to the micro controller. Features for automatic back purge, calibration gas injection and self calibrations. The Model DT3006 has standard 4 - 20 mA interfaces for oxygen and combustibles plus An Modbus RTU ready serial port. Relay contacts also included. Standard enclosure is a panel mount as shown or NEMA 4 wall mount.