Gas Leak Detector with LED Indicator sends out the alarm signal after detecting leaked gas. The Detector is easy to operate and has long operational life. The Detector ensures smooth performance and should be placed 15 to 25 cm above the floor and within 1 to 2 m horizontally within the range of possible gas leakage. The Detector respond audibly and visually before the leakage reaches 20% LEL and has microprocessor based design. The Detector can be availed with optional gas shut off valve/ relay output for exhaust fan, input to central security system. The Detector has the feature of easy installation and requires alarm current from 80 to 120 ma, operating temperature from -10 ° C to +55 ° C, operating humidity from 10% to 90% RH, maximum ripple voltage of 30%. The Detector has flash and sound alarm, alarm signal by relay network and is available in sizes such as 110 mm, 70 mm, 42 mm. The Gas Leak Detector with LED Indicator has good adaptability to the ambient, with dust-proof, moisture proof and anti-electromagnetic interferences function and has red colour led indicator.