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Power Supply: DC 9V battery operated Sensitivity Setting: conforms to EN50291 Standby Current: 30A Alarm Current: 25mA Operation Ambient Condition: 4 38 , 25 85 R.H. Sensor Type: electrochemical Sensor range:30 500PPM Battery spec: rating voltage: DC 9V Battery Package: Carbon Zinc 6F22 or Alkaline 6Lr61, 1604A for ANSI,6AM6 for JIS Battery Size: 25.5 16.5 47.5 (unit: mm), it is appro imation. Recommended battery: Gold peak 1604A,Gold power G6F22
