1)Light+sound alarm if user defined max,mini values are exceed 2)External sensor with 3meter cable 3)High accuracy:0.3C ,3%RH A2000 Alarm-HygrometerA2000 Alarm-Hygrometer has been widely used in the medicalindustry, electronic industry, food industry, the transport industry, themeteorological industry, textile industry, HVAC refrigeration, filemanagement, agricultural research, biochemistry lab ...