The M40 is housed in a rugged, impact-resistant case to provide superior performance and durability in harsh environments and resistance to radio-frequency and electromagnetic interference. Its four-button interface provides simple, intuitive operation and calibration, and the M40's five-second "Off' feature prevents unintentional shut-offs. The unit's compact size and economical price make it an ideal personal monitoring instrument.

Due to the shelf life of gas sensors, most multi gas monitors are made to order by the manufacturer. Please allow extra time for delivery of this product.