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Small white rectangular sensor with LCD screen and long external probe cable

WiFi Thermometer Hygrometer with Probe, LCD, App Alerts

SKU CH-4N8A-J6YMN

Monitors room and probe temperatures from -40°C to 120°C with ±1°C accuracy and 0–99% humidity, sending app alerts over 2.4GHz WiFi

  • Included itemsRefrigerator Thermometer Hygrometer Sensor*1(2*AAA battries
  • Monitor two zones simultaneously with 3.28 ft external probe
  • Remote access via 2.4 GHz WiFi with app alerts
  • Accurate readings ±1 °C and ±5 %RH
  • Probe withstands -40 °C to 120 °C extremes
  • Works with Tuya smart devices for automated scenes

Dual-Zone Monitoring

The WiFi thermometer hygrometer tracks ambient conditions and a second zone through a 3.28ft external probe. It measures temperature from 14.2°F to 140°F and humidity from 0% to 99%RH with ±1°C and ±5%RH accuracy. The probe extends the range to -40°F to 248°F for deep cold or hot spots.

Target Users & Limits

Suits owners monitoring a fridge, aquarium, reptile enclosure or guitar case alongside room climate. App alerts notify when readings exceed set thresholds. Not for buyers needing 5GHz WiFi connectivity, local-only logging without a cloud account, or industrial-grade calibration certificates.

Build Integration

Runs on two included AAA batteries and connects directly to a 2.4GHz network without a hub. The compact 75*44.4*17.5mm body fits tight shelves while the probe reaches confined spaces. Tuya linkage lets the sensor trigger smart plugs, humidifiers or IR remotes when temperature or humidity crosses defined limits.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 78% of the 3,030 comparable items (median $54.99).

Specifications

In the box
Included itemsRefrigerator Thermometer Hygrometer Sensor*1(2*AAA battries included)

Questions about this item

Do I need to supply my own AAA batteries for the sensor?

Two 1.5 V AAA batteries are already included in the box, so the unit is ready to power on immediately.

Will the sensor connect to my 5 GHz Wi-Fi network?

The device only joins 2.4 GHz networks; it will not associate with a 5 GHz SSID.

How can I verify the probe is reading correctly after I place it in the freezer?

The app shows live probe temperature; a reading between -40 °F and 248 °F confirms the sensor is operating within its specified range.

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