Coal Gas Detector 1.Induced GasaaCoal gas, natural gas, LPG 2.Alarm ... <=5%LEL 3.Resume density:8% LEL GA-338 Gas Detector 1. Voltage:AC220V or DC12V2. Sound pressure range:≥70dB/m3 ... of security products for customers worldwide. Such as Access control System, Access Control Board, Electromagnetic Lock, Electric Bolt Lock, Electric ... Strike, Time Attendance and Biometrics, etc. GA-338 Gas Detector