WN1821_C Wi-Fi Console with 4.9" LCD Display and Built-in CO₂ Detector
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Features
Indoor weather monitoring including carbon dioxide detection
4.9" LCD display & built-in Wi-Fi gateway
A dedicated display center for Ecowitt ecosystem sensors (more detail on compatibility table);
Measurement: CO2; Temperature & Humidity; Barometric;
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.
Display content:
Time&Week; Date or CO2 PPM Level, Backup Battery status ; Wi-Fi and RF signal status;
Indoor Temperature and Humidity, or WN34 or WN35(up to 8 channels), or WH51(up to 16 channels);
Multi channel Temperature/Humidity sensors with Min&Max record.
8 * Soil moisture (WH51), 8 * leaf wetness (WN35), 8 * multi channels sensor (WN30/WH31/WN34S/WN34L/WN36) can be displayed on LCD seamlessly.
Cloud server content:
Data and graph record: Relative & Absolute Pressure; Indoor Temperature and Humidity; Temp & Humidity with Multi-channel;
Services
Website page: ecowitt.net; 192.168.4.1;
APP: Ecowitt;
Weather servers support: ecowitt official cloud server;
Wunderground; Weathercloud; WeatherObservationWebsite; Customized (Homeseer; Homeassistant;);
Specifications (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% |
Recommend |
| 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)
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* WN1821 Display (Console)
1* USB to 2.5*0.7mm DC 5V power cord for display
Packaged information
Weight: 350g
Battery: N/A
NOTE: It is not a standalone product and needs to be used in conjunction with other sensors.
 | |
|---|---|
| Built-in sensor measurement | |
Pressure |
|
Indoor Thermo-Hygrometer (Temp & Humidity) |
|
CO₂ |
|
| Display Content | |
Relative Pressure |
|
Indoor Temperature |
|
Indoor Humidity |
|
| Console Features | |
Built-in a Wi-Fi Gateway |
|
Manage sensor on app |
|
| Connection & Data | |
Wi-Fi (2.4G only) |
|
RF Wireless protocol |
|
| Addable | |
Ecowitt IoT Device |
|
Ecowitt Sensor |
|
Compatibility Instructions
for all ecowitt network consoles
Please refer to the table to choose the correct sensors and consoles before checkout.
Note:
1) "1/4/8/16" = max number of sensors supported per console (excluding accessories).
2) Upload only = sensor readings shown only in the Ecowitt app and cloud (www.ecowitt.net).
3) Firmware (e.g. V1.9.6 / V2.0.2) = gateway/console must run this version or newer.
