à¤Ã×èͧµÃǨ¨Ñºá¡çÊ à¤Ã×èͧµÃǨ¨Ñºá¡çÊ µÔ´ä¿ Flammable Gas Detector CO52 LCD display with nominal 100, 1000 and 10,000ppm à¤Ã×èͧµÃǨ¨Ñºá¡çÊ à¤Ã×èͧµÃǨ¨Ñºá¡çÊ µÔ´ä¿ Flammable Gas Detector CO52 Detects all combustible gases as low as 50ppm with easy one key operation LCD display with nominal 100, 1000 and 10,000ppm indicators Audible beeper increases pitch tone as the concentration of gases go up Êè§ÊÑ­­Ò³àµ×͹´éÇÂàÊÕ§ Auto zero on start up 5 second response time Features: LCD display with nominal 100, 1000 and 10,000ppm indicators Audible beeper increases pitch tone as the concentration of gases go up Auto zero on start up 5 second response time Battery status on LCD display Backlit display automatically switches on in poorly lit conditions 1 year warranty; CE approved CO52 Extech Gas Detector Gas Leak Detector LPG NGV à¤Ã×èͧµÃǨ¨Ñºá¡êÊÃÑèÇ à¤Ã×èͧÇÑ´á¡êÊ