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Small white rectangular sensor with rounded corners and a hanging loop

TempPro TP351 Bluetooth Thermometer Hygrometer 260 ft White

SKU CH-20JW-ER4PD

A Bluetooth thermometer and hygrometer that monitors temperature and humidity up to 260 feet away with ±0.5 °F accuracy and two years of data logging

  • Battery runtimeAlkaline
  • Measuring range-4 degrees fahrenheit to 140 degrees fahrenheit
  • Operating conditions-4 degrees fahrenheit / 140 degrees fahrenheit
  • Storage conditions-4 degrees fahrenheit to 140 degrees fahrenheit
  • Product colorWhite
  • Product dimensions0.07 cm × 0.08 cm × 0.02 cm
  • Monitors conditions from up to 260 ft away with Bluetooth connectivity
  • Delivers precise readings within ±0.5 °F and ±2 % RH using an advanced NTC sensor
  • Refreshes data every 10 seconds for real-time temperature and humidity updates
  • Stores two years of history and exports logs for long-term analysis
  • Sends instant alerts and comfort indicators so you can adjust the environment immediately

Purpose & Audience

The TempPro TP351 is a Bluetooth thermometer and hygrometer designed for remote environmental monitoring up to 260 feet away. It suits homeowners, greenhouse operators, cigar enthusiasts, and anyone needing long-term temperature and humidity tracking via a smartphone app.

Pre-Purchase Checks

Verify that your smart device supports Bluetooth connectivity for pairing with the sensor. Ensure the intended location falls within the 260-foot line-of-sight range and that the operating environment stays between -4 and 140 degrees Fahrenheit. Confirm you have alkaline batteries available for the included power supply.

Thermals Noise Power

The unit operates silently with no moving parts, drawing minimal power from the included alkaline batteries. Measurement refresh occurs every 10 seconds with high precision of +/-0.5 degrees Fahrenheit and +/-2% RH. The compact sensor housing measures 0.07 cm by 0.08 cm by 0.02 cm and weighs 0.05 kilograms for unobtrusive placement.

How it compares

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

Price $18.99
Cheaper than about 70% of the 925 comparable items (median $23.99).

Specifications

Product
Brand nameTempPro
Part numberTP351
Product colorWhite
Power
Battery runtimeAlkaline
Size & build
Product dimensions0.07 cm × 0.08 cm × 0.02 cm
Product weight0.05 kg
Environment & compliance
Operating conditions-4 degrees fahrenheit / 140 degrees fahrenheit
Storage conditions-4 degrees fahrenheit to 140 degrees fahrenheit
More details
Measuring range-4 degrees fahrenheit to 140 degrees fahrenheit

Questions about this item

What comes in the box with the TP351 and do I need to buy batteries separately?

The unit ships with alkaline batteries included so you can start monitoring immediately after pairing the app.

How do I decide between the white TP351 and other TempPro hygrometers?

Choose the TP351 when you need the 260 ft Bluetooth range plus two-year data logging in a compact white housing.

What does the ±0.5 °F accuracy mean when I place the sensor in a greenhouse?

Readings will stay within half a degree Fahrenheit of the true temperature and within 2 % relative humidity, refreshing every 10 seconds.

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