WN1821 IOT Wi-Fi Weather Station, 4.9" LCD Display with Built-in CO₂ Detector and WN31(WH31) Multi-Channel Temperature/Humidity Sensor

Regular price $94.99
Regular price Sale price $94.99
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Packaged version & Sensor or gateway link frquency: North America MHz 915
WN1821 - Ecowitt
Regular price $94.99
Regular price Sale price $94.99


  • Indoor weather monitoring including carbon dioxide detection
  • 4.9" LCD display & Built-in Wi-Fi gateway
  • Time, temperature & humidity, barometric, CO₂ PPM Level
  • Compatible with more sensors: WS90, WS69, WS68, WS80, WH40, WN31(max.8),
    WH51(max.8), WH41/WH43(max.4), WH45, WH57, WH55(max.4), WN34 S/L(max.8), WN35(max.8), WFC01/AC1100(max.16)
  • Wi-Fi connecting, and upload to weather station servers (wunderground, weathercloud, weatherObservationswebsite)
  • DC power supply, supports backlight brightness adjustment

Overview of Display:

① Time

②Indoor Temp/Relative Humidity and Shared with Soil Moisture, Leaf Sensor

③ Signal Icon

④ WN31 Temperature

⑤ Channel Number

⑥ WN31 Humidity

⑦ WN31 MAX&MIN Humidity

⑧ WN31 MAX&MIN Temperature

⑨ Power Status

 CO₂ PPM Level

⑪ Wi-Fi Icon

Specifications of Display:

Measurement Range Accuracy Resolution Working condition
Barometric 300 to 1100 hPa (8.85 to 32.5 inHg)

Absolute pressure: ±1.5hpa;

Relative pressure: ±2hpa

0.1hPa (0.01 inHg) Recommend
Temperature (Indoor) 0°C to 50°C (32°F to 122°F) ± 0.2°C (± 0.4°F) 0.1°C (0.1°F) Recommend
-40°C to 60°C (-40°F to 140°F) ± 0.6°C (± 1.0°F) 0.1°C (0.1°F) LCD display or CO2 could fail 
Humidity (Indoor) 30% to 70% ± 1.8% 1%
1% to 99% ± 3% Normal
CO2 0 to 40000 ppm ± (50 ppm + 5% of reading) 1ppm Recommend

Power supply: 5V ⎓ 1.0A 5.0W

Backup power: 2 x AA batteries (Support Min. 24 hours working)

Specifications of WN31 Sensor:

Measurement Range Accuracy Resolution Working condition
Temperature 0°C to 60°C (32°F to 140°F)  ± 0.3°C  0.1°C Recommend
-40°C to 0°C (-40°F to 32°F)  ± 1°C Battery may not work 
Humidity 10% to 90%

± 5%

1% to 99%  ± 7% Normal

Sensor (backup): 2 x AA 1.5V battery (not included)

RF Transmission:

Transmission distance in open field: 150 m (500 ft.) depending on environment

RF frequency: 433/868/915 MHz depending on location

Sensor reporting interval: 61 seconds

Wi-Fi Transmission:

Transmission distance in open field: 50 m (165 ft.) depending on router and environment

RF Frequency: 2.4 GHz

WLAN and Ethernet: 802.11 b/g/n (802.11n, Max 150 Mbps)

Updates on the Internet: Customize 1-5 minutes (recommend 1 minute)

Parts List:

1* WN31 Sensor

1* WN1821 Display (Console)

1* USB to 2.5*0.7mm DC 5V power cord for display

Packaged information: 

Weight: 500g

Battery: N/A

Compatibility Instructions

for all ecowitt network consoles

Please follow the table to make sure you choose the right sensors and concoles before check out.
Note: The "1/4/8/16" means 1 console supports 1/4/8/16 sensors
( excluding accessories )