An four-gas detector combines a comprehensive range of features with simple one-button operation, suited to a wide range of industrial applications including confined space entry. The graphic LCD displays easy to identify icons that indicate operational information, such as bump test and calibration status for simplified onsite auditing. Interchangeable power options with extended battery runtimes for longer shifts. Full function self-test of sensor(s), battery status, circuit integrity and audible / visual alarms on start up and continuous testing on sensor(s). Multi-language support in English, French, German, Spanish and Portuguese.