Contour Matrix Gas Detector with ControlThe Contour Matrix Gas Detectors are the product of continuing research and development which BEP Marine Ltd devotes to their product range. The BEP Detectors use microprocessor control to ensure correct sensor sensitivity. The Detectors have the capability to control two sensors that detect both LPG and Petrol, with visual and audible alarms. There is a test switch to check the operation of sensors with indicators for fault detection. 600-GDL Gas Detector has the same features as the 600-GD, with the additional ability to switch a valve on and off. The 600-GDL has a "pulse and hold" feature which allows the solenoid valve to be opened, using full power, and then reducing power to hold the valve in the open position. This reduces power consumption and heat generated whilst the valve is in the on position.Features: Operating Voltage 10 to 32 Volts DC Self-testing capability Microprocessor control Provision for external alarm Automatic shut-off solenoid control with pulse and hold circuit for low power draw (600-GDL only) Provision for bilge blower Dual sensor capability For remote alarm operation use part no. 54-27C4 WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Truck Freight: No Oversized: No