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Three small white rectangular sensors with LCD screens sitting side by side

WiFi Thermometer Hygrometer Sensor White 3 PCS

SKU CH-M3HJ-E4CT8

Three WiFi temperature and humidity sensors with LCD displays, 2.4GHz connectivity, app alerts, Alexa and Google Home voice control, and one-year battery life

  • Product colorWhite
  • Monitor temperature and humidity remotely via 2.4 GHz WiFi and the Smart Life app
  • Receive app alerts when conditions exceed your preset ranges or battery runs low
  • Automate other smart devices with custom scenes such as turning on AC above 27 °C
  • Check current readings hands-free using Alexa or Google Home voice commands
  • View and export up to one year of historical data with graphs by year, month, day or hour

Smart WiFi Sensor Pack

This three-pack of white WiFi thermometer hygrometers connects to 2.4GHz networks for remote monitoring through the Smart Life app. Each unit tracks indoor temperature and humidity with an LCD display for local reading. The sensors suit home rooms, pet areas or greenhouses and work with Alexa and Google Home for voice queries.

Range and Limits

Temperature is measured from -9.9 to 60 (14.2 to 140) with ±1 (±1.8°F) accuracy, while humidity covers 0 to 100% with ±5% accuracy. The devices require a 2.4GHz WiFi signal and must stay within 10 metres of the router in open areas. They are not waterproof and cannot be used outdoors. 5GHz networks are not supported.

Build and Daily Use

A low-power chip aims for one-year battery life, and the app sends low-battery alerts when replacement is needed. The compact, portable design allows flexible placement on shelves or walls. Smart linkage lets you trigger other Smart Life devices automatically, such as turning on an air conditioner when temperature exceeds 27. °C/°F switching is done via the app or a double-click of the reset button.

How it compares

Measured against everything we stock in Digital Thermometers & Hygrometers, at today’s prices. Recalculated every night.

Price $38.99
Pricier than about 83% of the 925 comparable items (median $23.99).

Specifications

Product
Product colorWhite

Questions about this item

Will the 2.4 GHz WiFi sensor work alongside my older 5 GHz router?

The sensor connects only to 2.4 GHz networks, so it will operate on the same router if that band is enabled; 5 GHz is not supported.

How can I confirm the ±1 °C accuracy after setup?

Compare the LCD reading with a trusted reference thermometer; the sensor should stay within ±1 °C from -9.9 to 60 °C and ±5 % humidity from 0-100 %.

What comes in the three-pack and do I need to buy batteries separately?

The box contains three white sensors; each includes a pre-installed battery rated for about one year, so no separate purchase is needed initially.

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