Gas Detector GD04 Monitoring system for the detection of toxic gases Measuring method: Chemical analyzer Sensors: max. 4 (also different ones) Sensor connection: 4-20 mA interface Cable length: standard 5 m / max. 2000 m Mains connection: 230V, 50Hz (110V, 50Hz and 24 V DC upon request) Display: 2 red LEDs per analyzer (Alarm 1+2), 1 Yellow LED (Trouble), 1 green LED (Power) Signal transmitter: in amplifier casing 85 d B (A) in 1 m Relay: a total of 4 voltage-free make-and-break contacts (Alarm 1 / Alarm 2 / Trouble / ext. hom) Contact rating: 230V, 5A