â·ÃÊͺ¶ÒÁÃÒ¤Ò Handheld type gas leak detector AZ-7291. Low cost handheld type detector checking methane and propane gas leakage. à¤Ã×èͧÇÑ´á¡êÊ ÃØè¹ AZ-7291 Gas Leak Detector AZ-7291 DETECTS METHANE AND PROPANE GAS LEAKAGE ! SINGLE COLOR LED DISPLAY 5-LEVEL LEAK ! ALARM AND READY LED ! BATTERY LOW INDICATION ! AUTO-CALIBRATION WHILE POWERS ON ! BUILT IN EARPHONE JACK ! FEATURES MUTE FUNCTION ! QUALITY SEMI-CONDUCTOR SENSOR ! QUICK RESPONSE HIGH SENSITIVITY ! Specifications: 7291 Methane range 40~640 ppm Propane range 40~640 ppm Sensetivity 40 ppm (Methane) 40 ppm (Propane) Gas discrimination filter N/A Response time within 10 seconds Warm up time within 60 seconds Operating condition -5~45°C , 5~95% RH (avoid condensation) Storage condition -20~50°C , 0~95% RH (avoid condensation) Power supply 4 pcs AA batteries or 9V adaptor Meter size (L×W×H ,mm) 175×47×28 Weight 120g Flexible probe length 18" (465 mm) Standard package Meter, manual, AAA alkaline batteries, plain box , wrist strap, soft carry pouch 7291 AZ Instruments AZ-7291 Gas Detector Gas Meter GD-7291 GD7291 LPG NGV µÃǨ¨Ñº µÃǨÊÀҾö µÔ´µÑé§á¡êÊ ÈÙ¹ÂìµÃǨÊÀҾö à¤Ã×èͧµÃǨ¨Ñºá¡êÊÃÑèÇ à¤Ã×èͧÇÑ´á¡êÊ à¤Ã×è×èͧÁ×Í á¡êÊÃÑèÇ