à¤Ã×èͧµÃǨ¨Ñºá¡çÊ Gas Detector Gas Meter GD3300 GD-3300 Combustible Gas Leak Detector à¤Ã×èͧµÃǨ¨Ñºá¡êÊ LPG NGV Features Highly sensitive and reliable Easy to Use: One-hand operation with thumb controlled tick adjust knob. Tick accelerates when sensor tip approaches leak. Use in contaminated Environments: Eliminates background gas concentration with fully adjustable tick rate. Pinpoint small Leaks: Detects all combustible gas leaks even tiny leaks. Size(HxWxD): 221mm x 72mm x 46mm Weight: 520g Specifications Pump Driven field Calibrateable Range 10ppm Sensor Type Solid State Alarm Visible & Audible at 10% LEL for Methane. Can be calibrated for other concentrations or gases. Warm-Up Approx.1 minute Responsse Time Less than 2 sec. (up to 40% LEL) Duty Cycle Intermittent Probe Length 16" Battery 3 "C" Alkaline Battery Life 8 hours Continuous Use Typical