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Small white rectangular sensor with rounded corners, freestanding or adhesive-mounted

Yasorn YSAC859 WiFi Thermometer Hygrometer White

SKU CH-BTBP-MA4SH

A compact WiFi thermometer and hygrometer storing a year of data with app alerts and Alexa voice queries

  • TypeUse manual
  • ColorWhite
  • FeaturesUse manual, Rectangular, ±1ºC/±5% RH
  • Measurement Range-20 degrees_celsius to 60 degrees_celsius
  • Measurement Accuracy±1ºC/±5% RH
  • Battery LifeLRO3-15, 2
  • Accurate readings with ±1 °C and ±5 % RH precision
  • Remote monitoring via 2.4 GHz WiFi and mobile app
  • One-year data storage with CSV export for trend analysis
  • Smart automation triggers devices at set temperature or humidity thresholds
  • Compact battery-powered design with adhesive or freestanding mounting options

Yasorn YSAC859 WiFi Monitor

The Yasorn YSAC859 is a compact white hygrometer and thermometer that connects to 2.4 GHz WiFi for remote monitoring via a mobile app. It measures temperature from -20 to 60 degrees Celsius and humidity from 0 to 99 percent RH with an accuracy of ±1 degree Celsius and ±5 percent RH. Data refreshes every two minutes and the device stores one year of history with CSV export. It runs on two included AAA batteries and mounts with adhesive or stands freely.

Who This Suits and Who Should Look Elsewhere

This unit suits homeowners, greenhouse growers and parents who want remote alerts and automated climate control for single rooms. Buyers needing multi-room coverage, wired power or integration with platforms beyond Alexa voice queries should look elsewhere. The monitor only supports 2.4 GHz networks and does not report humidity to voice assistants.

Deciding Specification: 2.4 GHz WiFi Connectivity

The single specification that decides fit is the 2.4 GHz IEEE 802.11 b/g/n wireless interface. Your router must broadcast a 2.4 GHz band for the sensor to connect and stream data to the app. If your network is 5 GHz only, this device will not join it.

Highlights

  • Accurate readings with ±1 °C and ±5 % RH precision
  • Remote monitoring via 2.4 GHz WiFi and mobile app
  • One-year data storage with CSV export for trend analysis
  • Smart automation triggers devices at set temperature or humidity thresholds
  • Compact battery-powered design with adhesive or freestanding mounting options

Specifications

BrandYasorn
TypeUse manual
ColorWhite
Part NumberYSAC859
FeaturesUse manual, Rectangular, ±1ºC/±5% RH
Measurement Range-20 degrees_celsius to 60 degrees_celsius
Measurement Accuracy±1ºC/±5% RH
Battery LifeLRO3-15, 2
Operating Environment-20 degrees_celsius / 60 degrees_celsius
Storage Environment-20 degrees_celsius to 60 degrees_celsius
Dimensions3.35 in x 3.35 in x 1.77 in

Questions about this item

Which Yasorn YSAC859 capacity or version should I choose?

The Yasorn YSAC859 is offered as a single white unit measuring 3.35 in x 3.35 in x 1.77 in, powered by two included AAA batteries, with no alternative capacities or versions listed.

What does the ±1 °C / ±5 % RH accuracy mean when the sensor is running in my greenhouse?

The sensor reports temperature within 1 °C and humidity within 5 % RH of the true value across its -20 °C to 60 °C range, refreshing data every two minutes so you see near-real-time conditions.

What Wi-Fi standard does the YSAC859 use and what does it limit in practice?

It connects on 2.4 GHz IEEE 802.11 b/g/n only, so it will not join 5 GHz networks and range depends on your router’s 2.4 GHz coverage.

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