Stationary Combustible Gas Detection System has the capacity to monitor potentially hazardous areas in proximity to oil and gas transit stations, gas and oil trunk pipelines, oil and gas storage tank farms, loading racks and similar facilities.. SGAES-TG Combustible Gas Detection System consists of an UPES-40 Control Unit with up to 16 SGOES type gas detectors(SGOES,SGOES M, SGOES M11) Gas Detectors, TGAES Gas detector and SSS type gas detectors(SSS-903M,SSS-903ME). The Control Unit communicates to the Gas Detectors via 4-20mA loop. The control unit provides a 4-20 mA signal proportional to the gas detectors measuring range of gas of interest, High and Low Alarm indications and Trouble signals. . If a lower explosive level (LEL) of gas presence (measured as a percent) has reached a preconfigured value, the UPES-40 sounds a warning and sends alert signals to the control room operator. In addition, the system initiates facility level protection programs. These can include activating emergency ventilation systems within automated response The Detectors may be remotely connected up to 3600 ft away from the Control Unit. The UPES-40 has an operating voltage of 220 VDC.