WiFi Humidity Sensor

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Wi-Fi humidity sensors allow you to monitor the relative humidity of the air within a room or enclosure. Ideal for monitoring humidity within greenhouses, industrial spaces, museums, saunas and humidors. They can also be used for residential applications such as controlling mold, mildew or dust mites.

Sensor Accuracies

Humidity Sensor Specifications Chart


  • Scientific grade sensor.
  • +/- 3% accuracy (between 10% - 90% RH).

*   Actual range may vary depending on environment.
** Battery life is affected by reporting frequency (heartbeat), sensor type, Wi-Fi security type, distance from Wi-Fi router and other variables.

Data Snapshot

Monnit humidity sensor data view in software

In the Box

  • Wi-Fi Sensor
  • AA Batteries
In order to program the sensor to connect to your wif-fi network, you will need a Wi-Fi programming cable and the free MoWi setup utility. The MoWi setup utility is currently available for Windows® PC's only. Mac and Linux are not currently supported!

Humidity Sensor Specifications

Accuracy± 3% under normal conditions ( 10% - 90% RH )
RH Operating Range0 – 100% RH
RH Response Time8 sec ( tau 63% )
Weight3.7 oz.

Wi-Fi Specifications

Battery Type2 Replaceable AA 1.5 V Batteries
Max Operating Temperature Using AA Alkaline-18°C to +55°C (0°F to +130°F)
Max Operating Temperature Using AA Lithium-40°C to +85°C (-40°F to +185°F)
Battery LifeUp to 5 years depending on sensor type, Wi-Fi security, distance from Wi-Fi router, reporting frequency and other variables. (Testing surpassed 90,000 transmissions until battery depletion.)
Wi-Fi Security StandardsOpen, WEP, WPA, WPA2 Security Standards
Wi-Fi Security ProgrammingVia USB cable (sold separately) and downloadable PC software.
Network SettingsAuto DHCP/DNS or Static
Data Logging (iMonnit Basic)On Wi-Fi disruption, unit will log the most recent 50 readings and transmit when Wi-Fi connection is re-established.
Data Logging (iMonnit Premiere)On Wi-Fi disruption, unit can log up to 50,000 readings and transmit when Wi-Fi connection is re-established.
Power Consumption4uA sleep, 35mA active RX, 180mA TX (at +12dBm)
Wi-Fi Data RateAuto configures to best rate for maximum range.
LED LightsStatus / Activity
Network ConnectivityConnects to hidden and visible Wi-Fi networks

Wi-Fi Specifications

Operating Frequency802.11 b/g (2.412 - 2.484 GHz)
CertificationsFCC ID: T9J-RN171. IC: RSS-210 low-power communication device. CE ID: 0681.
Device RangeUp to 100 ft. (Typical to standard Wi-Fi devices)
Specifications Image