Prosense S-DP4 Gas Detector Controller, Alarm Panel for Up to 4 Analog 4-20 mA gas detectors. Monitors explosive (LEL) and toxic(ppm, %VOL), Alarm and Fault LED indicators for each detector and buzzer. Fault, Alarm1, Alarm2 and AUX Relays. Optional Modbus RS485 output and Alarm/Fault Relays for each channel. Polycarbonate Housing, IP66 *** Phased Out *** Replaced by 700-DPX