Subtronics India Pvt. Ltd. Is an ISO 9001:2000 certified company which offers Single Channel Microprocessor based Gas Monitor. Single Channel Microprocessor based Gas Monitor requires an operating voltage of 240 V A.C or 110 V.A.C. This machine is capable of hooking up one electrochemical type gas detector. Single Channel Microprocessor based Gas Monitor features three adjustable microprocessor based alarm levels, built-in beep buzzer and three relays. It has built-in external siren facility.