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STH51 Smart Thermometer Hygrometer - 3*Alarm+1*SBS50 Base Station(STH54)
Function
  • Smart App (2.4 GHz Wi-Fi Only)
  • Alexa Compatible
  • Compact Design
  • Requires SBS50 Base Station
Quantity
Select Option
  • 3*Alarm+1*SBS50 Base Station(STH54)

    3*Alarm+1*SBS50 Base Station(STH54)

    $49.99 Save $0.00

  • 1*Alarm(STH51)

    1*Alarm(STH51)

    $14.99 Save $0.00

Service
  • Free Shipping Over $49
  • 5-YEAR WORRY-FREE WARRANTY
    60-DAY MONEY BACK GUARANTEE
  • Payment method
    American Express Apple Pay Diners Club Discover Google Pay JCB Mastercard PayPal Venmo Visa
In Stock—Estimated Delivery in 3-7 Business Days
STH51 Smart Thermometer Hygrometer - 3*Alarm+1*SBS50 Base Station(STH54)
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Smart Thermometer
Hygrometer Kit

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Smart Notifications

Receive a push alert on your phone when temperature/humidity
goes out of the preset range.

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Technical Specifications

  • Power Supply

    Replaceable 3 V CR123A lithium battery

  • Operating Life

    10 years

  • Battery Life

    1 year

  • Sensor Type

    Photoelectric

  • Coverage Area

    215–430 sq ft (20–40 m²)

  • Operating Temperature

    40–100°F (4.4–37.8°C)

  • Operating Relative Humidity

    ≤ 85% RH (non-condensing)

  • Alarm Volume

    ≥ 85 dB at 10 ft (3 m) @ 3.2 ± 0.3 kHz pulsing alarm

  • Silence Duration

    About 9 minutes

  • App

    X-Sense Home Security (both Android and iOS supported)

  • Wireless Frequency

    2400–2483.5 MHz (incompatible with 5 GHz Wi-Fi network)

  • Wireless Protocol

    IEEE 802.11b/g/n

  • Transmission Power

    17 dBm

Specifications Of Thermometer Hygrometer

  • Power Supply

    2 × AAA batteries (replaceable)

  • Voltage

    3 V DC

  • Battery Capacity

    1,200 mAh

  • Product Life

    5 years

  • Battery Life

    1 year

  • Material

    ABS

  • Alarm Volume

    No sound when the temperature or humidity exceeds or falls below the set level (the base station will sound and an app push notification will be sent)

  • Indicator Light

    Red / Blue

  • Operating Temperature

    -4–140°F (-20–60°C)

  • Operating Humidity

    0–100% RH

  • Temperature Accuracy

    {"-4–32°F (-20–0°C)"=>{"Typical Accuracy"=>"±0.36°F (±0.2°C)", "Maximal Accuracy"=>"±1.26°F (±0.7°C)"}, "32–140°F (0–60°C)"=>{"Typical Accuracy"=>"±0.36°F (±0.2°C)", "Maximal Accuracy"=>"±0.72°F (±0.4°C)"}}

  • Humidity Accuracy

    {"10–90% RH"=>{"Typical Accuracy"=>"±2% RH", "Maximal Accuracy"=>"±3.5% RH"}, "0–10% RH and 90–100% RH"=>{"Typical Accuracy"=>"±2–3% RH", "Maximal Accuracy"=>"±3.5–5% RH"}}

Customer Reviews

Based on 48 reviews
81%
(39)
13%
(6)
2%
(1)
2%
(1)
2%
(1)
A
Anonymous
Works great

Works great with the app. It’s good to know the temperature and humidity in different parts of the house.

J
J. Steeves
The sensors are working well and I really like the app reporting

The sensors are working well and I really like the app reporting. I wish they went down to -40 as we would like toutput one outside and have it charted to compare with the one in the greenhouse.

R
Rodrigo
Good, could be better

App is good and product looks well built, would be nice if it was designed to be able to use it outside. Manual says not to. Also, temperature sensing is slow.

L
Luis Cuello
Great to monitor your basement & attic remotely

I use these all over the home to compare and contrast temperatures. I use that data to look for insulation opportunities. I love this system. So easy to use

J
Jhonny Socorro
Remote thermometer and hygrometer.

This product is essentially a remote temperature and humidity monitor, but with more detailed data than expected. Shipping was fast, and everything arrived quickly.