Diffusion transmitter for oxygen and toxic gas detection with an explosion-proof aluminium housing. Supports 4–20 mA current-source or current-sink output and includes an FND display for inspection and calibration. One-person calibration simplifies maintenance. Galvanic and electrochemical sensor configurations are available according to the target gas. Suitable for wall or 2-inch pole mounting; operating temperature: −20°C to 60°C.