A microprocessor-controlled two-channel monitor with automatic solenoid valve on / off switch.

Its features include low current draw, plug-in sensors (second sensor optional), display module fault light / alarm and fault light / alarm to indicate a malfunction in either one of the sensors. (Fault indicators show that the module or sensors are not working and may need repair.)

A "press to test" button for each channel confirms function.

1 MS-2 sensor and 1 SV-1 solenoid valve included.

The system is calibrated at 20% LEL (lower explosive limit) to eliminate most nuisance alarms while allowing enough t