1. Feature
1. WN1821 has built-in Photoacoustic NDIR
CO₂ Sensor for detecting CO₂ concentration,
while WN1820 can work with WH45
Transmissive NDIR CO₂ detection, or
WH46 Photoacoustic NDIR CO₂ to activate
CO₂ function. Both of display has built-in
temperature and humidity, and air pressure.
2. Support displaying indoor temperature
humidity and the changing trend; support
displaying outdoor multi-channel
transmitter temperature humidity and the
changing trend.
3. Support receiving and displaying multi-
channel temperature and humidity sensor/
transmitters, such as WN31, WN34, WN35,
WH51.
4. Can be used as a Wi-Fi gateway to support
the reception of more sensors' data, which
can be viewed via the web.
