Refrigerants: Ammonia (R717): Type GDA. Carbon Dioxide (R744): Type GDC. Halo-Carbon - HCFC (R22, etc): Type GDHC. HFC (R404A, R134a, R407C, R507): Type GDHF. Hydro-carbon - Propane (R290, R600, R600A, R1270): Type GDH. Electrical connections: terminals accept 0.5-1.5 mm2 (20-15 AWG). Supply voltage: 12- 24 V a.c / 12- 30 V d.c. Max load : 4W. Analog output: 4-20 mA Max 400 Ohm, 0-10 V Min. 10 kOhm; 0-5 V Min. 10 kOhm; RS 485 Communication: To Danfoss m2 monitoring unit. Digital output – volt free contacts: Load: 1 A, 24 V a.c/d.c. Type Code GDHF SC 1000 Weight 0.721 Kg Alarm limits high 900 ppm Alarm limits low 500 ppm EAN no. 5702428185189 Encl. IP65 Freq. 50/60 HZ Nema Rating 4X Power consumpt. 0,23 A Power consumpt. 4,0 W Descript. Gas Detection Sensor Prod. Group Sensors Prod. name Gas detecting sensor Refrigerant R404A/R507 Refrigerants range 0 - 1.000 ppm Response delay 0 s Sensor Semiconductor Supply volt. AC 12 - 24 V Supply volt. DC 12,00 - 24,00 V Temp. range -40 - 50 °C Temp. range -40 - 122 °F