ExtechInstruments 445715 Hygro-Thermometer

Fine while it worked but the unit failed after a couple of years. Bit expensive for a throw-away item.

No setup required, just install the battery and wait a moment. The dew point reading is great for checking against the temperature of external walls etc to avoid mould and condensation.

This is a very good instrument displaying exactly what is relevant: Relative humidity, temperature and dewpoint. The dewpoint calculated from the other two is very useful to know but most other instruments show the time instead and who wants that on an instrument like this? The alarm functions and the max high and low recordings are useful as well. Designed by a respected instrument manufacturer by engineers with a vision.I lost my old one and had to find an exact match since nothing else could serve my needs any better.

Instructions for the product are not available in English nor in French. Only in "Chinese" Not really useful.

Good but very overpriced

perfect

I just installed a whole house dehumidification system in my home and needed 2 hygrometers for the main floor and the basement. I wanted to buy an accurate unit with a large print digital display. Thus far, the temperature tracks right on target with my expensive furnace thermostat. I have nothing to check the accuracy of the humidity readings, but assuming they are fairly accurate, I was able to adjust my Aprilaire humidity setting to keep the humidity levels at ~ 50% in both locations. The unit has a fold up stand on the back of it so I did not choose to wall mount them. I placed one of them on a book case shelf in my great room and one on my office desk in the basement. I also like the mount of the sensor on the outside of the unit which produces a more accurate humidity reading. I have used the Extech units for 1 month, but I am extremely satisfied with their performance to-date. They are more expensive than many others, but always believe that most of the time you get what you pay for by spending a little more money. In this case, I am protecting my entire home against humidity damage and was willing to pay more for a quality product. As usual, Amazon's pricing was better than the competition for this product. I can't testify that there wasn't a better price out there, but the price was good and Amazon's excellent shipping policy for Prime customers made the decision easy.