Hygrometer · Protmex

Protmex PT6508 Hygrometer

Temperature and humidity monitor

Updated October 2026

Quick verdict

A well-matched choice for setting a humidifier or dehumidifier.

Strength
Temperature ±1.5 degrees celsius.
Trade-off
Readings need a few hours to settle after moving it.
Right buyer
Setting a humidifier or dehumidifier.
Dimensions (seller)
2.36"W x 2.9"H
Product weight
190 g
Prices change often; the button shows today's price.

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Why it matters

The Protmex PT6508 Hygrometer is a temperature and humidity monitor with a stated temperature accuracy of 1.5 degrees celsius and a humidity range of 0%-100%.

A hygrometer tells you whether you need a humidifier or a dehumidifier: aim for 40 to 60 percent relative humidity indoors.

The listing names an outdoor reading.

Price-wise it sat in the dearest third of the 25 hygrometer models we cover when we checked; the button shows today's price.

It qualifies for our list Best Hygrometers for Home, where it is ranked against every model that meets the same rule.

The listing gives dimensions of 2.36 inW x 2.9 inH and a weight of 190 g.

Who it's for, and who should skip it

Good fit if

  • Setting a humidifier or dehumidifier

Look elsewhere if

  • Replacing a CO or smoke alarm

Pros and cons

Pros

  • Temperature ±1.5 degrees celsius

Cons

  • Readings need a few hours to settle after moving it

Limitations to weigh

  • Not stated on the Protmex PT6508 Hygrometer listing: connectivity, power source. Ask the seller or check the manual before relying on it.

Specifications

The bracket shows where each figure comes from.

Dimensions (seller)2.36"W x 2.9"HRetailer
Product weight190 gRetailer
Mounting / installationTabletopRetailer
Humidity range0%-100%Retailer
Voltage1.5 voltsRetailer
Temperature accuracy1.5 degrees celsiusRetailer
Pack count1Retailer
Unit count1 CountRetailer
In the box4 x AAA Batteries, 1 x Packing Bag, 1 x Use ManualRetailer

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Final verdict

A well-matched choice for setting a humidifier or dehumidifier. Confirm the model it fits before ordering.

Where to buy

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

Where should I put the Protmex PT6508 Hygrometer?
At breathing height in the room you use most, away from windows, vents, humidifiers and direct sun; give it an hour to settle after moving it.