
Elevate Comfort, Conserve Energy
WS203 is a wireless environmental monitoring sensor detecting the motion of humans or animals, surrounding temp and humidity. It ensures the indoor environment at a preset comfort level via pairing with HVAC system if motions are being detected, which is a huge energy saver and brings much comfort.

Elevate Comfort, Conserve Energy
Wireless Transmission | |
---|---|
Technology | LoRaWAN®, Milesight D2D |
Frequency | CN470/IN865/EU868/RU864/US915/AU915/KR920/AS923-1&2&3&4 |
Tx Power | 16 dBm (868 MHz)/20 dBm (915 MHz)/19 dBm (470 MHz) |
Sensitivity | -137 dBm |
Mode | OTAA/ABP Class A |
Measurement | |
PIR | |
Detection Area | 120 ° Horizontal, 100 ° Vertical |
Detection Distance | Maximum 6 m |
Temperature | |
Range | -20°C ~ 60°C |
Accuracy | ± 0.2°C |
Resolution | 0.1°C |
Humidity | |
Range | 0% ~ 100% RH |
Accuracy | ± 2% RH |
Resolution | 0.5% RH |
Others | |
Button | 1 x Power/Reset Button (Internal) |
LED Indicator | 1 × Status Indicator |
Configuration | NFC Configuration via Mobile App |
Advanced Feature | Milesight D2D Controller, Data Storage, Data Retransmission |
Physical Characteristics | |
Power Supply | 1 × 4000 mAh ER18505 Li-SOCl2 Battery |
Battery Life* | Up to 5 years (30 min Interval + 64 Triggers per Day, 25°C) |
Operating Temperature | -20°C to +60°C |
Relative Humidity | 0 to 95% (Non-condensing) |
Dimension | 73 x 73 x 26 mm ( 2.87 x 2.87 x 1.02in) (Without PIR Cover) |
Ingress Protection | IP30 |
Color & Material | White + Grey, PC + ABS (Flame Retardant) |
Installation | 3M Tape Mounting, Wall Screw Mounting |
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Specifications
Brand | Milesight |
Frequency Band | AS923 |
Power type | Unchargable Battery |
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