HT607 Temperature Humidity Meter High Precision Digital Hygrometer with Ambient, Relative Humidity, Dew Point, Wet Bulb Thermometer, Min/Max Hold, LCD Backlight with Cover Protector

It's largely a matter of faith as to whether any hygrometer is giving accurate readings. There are ways of calibrating them, but these aren't all that reliable for a variety of reasons, like the fact that calibrating at one humidity level doesn't guarantee accuracy at other humidity levels. That's due to the fact that errors are nonlinear (not always off by a constant amount). Errors can be small (or even zero) over some portion of the range and large at others. Most home calibration methods, like the salt method, calibrate at the high extreme of the range, when our concern may be for accuracy elsewhere in the range.That issue is a tough one to get around, but digital sensors seem to have gotten better. In any case, taking any value of relative humidity as the gospel truth is a questionable proposition.What I look for is patterns of change in displayed RH as the environment changes and, to some degree, concurrence among multiple indicators. That's where this unit seems to excel. It gives me a reading that tracks (notice I didn't say "agrees") with other devices I have and with changes in the environment, such as running the heat like crazy and/or running a humidifier. Also, repeat measurements are reasonably stable under unchanging conditions. So, the readings are reliable (notice I didn't say "accurate").The various bits of information the unit provides are convenient. For example, the dew point is sometimes more informative than the RH. This unit displays that.To sum up, even though I have no certainty that the readings this hygrometer gives me are precisely accurate RH values, I think it does about as well as you can expect in a consumer-grade product. It's consistent, easy to use, easy to read, compact, and affordable. If you need more than that, then you probably should be looking at laboratory equipment rather than something like this hygrometer. I like it and recommend it for most uses outside of a laboratory. It might even be fine in a lab but I'd need further validation tests to know that. In the real world, at affordable prices, in a convenient form factor, I think this is pretty much as good as it gets.

Easy to use. I use it for work. It gets the job done. Price is perfect. Fits your hand. Accurate readings and great for the price.

Works well, I think it's accurate

I don't have any high precision standards at home, because a good thermocouple device (type T) costs $100-200+ and a precision hygrometer is many times that. However, this gadget reads in a reasonable amount of time (I'd let it set 10 minutes before reading it, although a little less might be required) and it seems to be degree-ish accurate and 1-3% in humidity/dew point. It's actually hard to measure dew point with more than 2-3% accuracy so I wouldn't let that bum you out. Ground level dew points are strongly affected by microclimates anyway (did your sprinkler just run?) and indoors there are other challenges (is someone making chicken stock today?).Anyway, for a $20-30 gadget this works well, is exceptionally easy to use and has no obnoxious failings, and should satisfy the needs of people who just want an easy way to get a reasonably accurate reading of temp/RH/dew point at a random location in a few minutes.Stamp of approval from me.

This was my second attempt to purchase an inexpensive temp/humidity meter. The first one (~$20 as of today, thin black and orange model) was not great and not accurate - not recommended. This HT607 model seems great so far. Temp and humidity accuracy seems pretty good and the dewpoint and webbulb calculations seem to be accurate(ish). I think you can't go wrong for ~$30. I really like the screen - the digits are large and easy to read, and it has a fantastic backlight. This unit shows three things on the screen at once in large text: temp, humidity, and dewpoint or wetbulb (selectable). It's really nice to have all three on the screen at once. Having the backlight at the push of a button is excellent.

Needed to upgrade from an older pocket combo T/H probe, thought I'd try this one since I keep it in my tool bag now, not the pocket. It's been very reliable, accurate, good easy to read layout on LCD, long battery life. For the price point, certainly recommended and think most people would like it as long as they don't want one to carry in their pocket.

Just received, out of the box the ambient room temperatures are off, reading 3-4 degrees too high. It's a meter, it's supposed to be reasonably accurate. It uses the ambient temperature to calculate the Dewpoint (the reason for buying the device) it sort of negates the reason for owning the device if that parameter is off.Based on the price, I didn't expect lab instrument accuracy, but within 2 degrees as specified would have been acceptable. However, I will keep the device and just keep in mind the DP reading will always be a bit higher elevated that what is actually present.

As accurate as you would like to be! Thing is a nice working machine. Was spot on with the t stat. I work in the hvac field and got curious about a cheaper option to see what I’m dealing with in some applications and it is awesome .