HA203/HA303 Digital Thermostat
This product has been discontinued and removed from our shelves.
Electronic Thermostat/ Heater Thermostat/ Heating Unit Thermostat
The HA203/HA303 digital thermostat is used in heating systems and is a popular unit because of its microprocessor based controlling technology.
The HA203 model is applied in water heating systems and adopts a normal open or closed valve.
 The HA303 electronic thermostat is applied in electric heating systems and measures both the room temperature and the temperature of the devices. Set-point range is 20~90℃. When the device temperature reaches a set-point, the thermostat stops heating automatically to protect the heating devices and guarantee that the devices work under proper temperature. This provides a great deal of safety and energy savings.
Features
 ● Aesthetic appearance
 ● Control of electric equipment, normally open or closed valve
 ● Highly reliable single-chip microcomputer is adopted for high anti-interface performance
 ● Touch switch
 ● LCD display, with blue backlight optional
 ● Relay output
 ● Temperature correction function
 ● Anti freezing
 ● Optional dual-temperature dual control function
 ● Housing material: PC ABS 
 ● Standard 86-box, with the thickness to be 13mm
 ● Standard hole spacing: 60mm
 ● Terminal Wiring
 ● Safety and reliability tested
 ● Power supply range: AC85~260V
Specifications
 ● Temperature Sensor: NTC
 ● Display: LCD
 ● Self Power: <1W 
 ● Ambient Temperature:0~45℃
 ● Humidity: 5~95% RH(Non-condensate)
 ● Button: Touch-key
 ● Accuracy: ±1℃
 ● Set-point Range: 5~35℃
 ● Power Supply: AC85~260V,50/60Hz
 ● Housing: PC+ABS(Fire retardant)
 ● Dimensions: 86×86×13 mm(W×H×D)
 ● Hole Pitch: 60 mm(Standard)
 ● Protection Class: IP 30
 ● Output: Water Heating: AC220V 2A(Resistive),AC220V 1A(Inductive)
 Electric Heating: AC220V 16A(Resistive),AC220V 6A(Inductive)