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

This is a well made instrument, quality construction. I have compared its F Temp readings to a NIST bulb thermo I have and it within 1 degree, so accuracy is very good. However there are two issues. One is that it has a lot of measuring delay due to thermal lag of the heating and cooling of the sensor, so you need to let it stabilize in the environment you want to measure for at lest 3 minutes.The other issue is that it will not show the MAX / MIN at the same time as it displays the current temp. This is a severe issue, and for me it is really a deal killer. If you enable its MAX/MIN function its behavior is that it resets the previous MAX/MIN. After setting its state to record MAX/MIN, there is no way to have it read and report to you the current Temp. After the MAX/MIN state of the device is enabled all you can read out is those two measurements of what it has been recording as the MAX/MIN, This is a severe issue, as if you want to ask it for the current F you must disable its MAX/MIN state and return to its current reading state, which them resets the MAX/MIN it has been recoding. SO the previous MAX/MIN data is then lost. The device should be able to record MAX/MIN as it also reports the current Temp readings. I have a device by another manufacturer (ThermoPro TP357) that does this and also recodred a history log of the MAX/MIN. It is a far more useful device with much better programming logic.I do still use the PROTmex as its very large easy to read screen and it accuracy make it well suited to making current reading in a fixed location over period of time. It is a good, well made device, and I can recommend it, but please realize its failure to report and record MAX/MIN at the same time.as it shows the current temperature is a severe issue, You get one state or the other, but not both !

This is only my first day with this product so hopefully nothing goes awry. But so far this instrument is absolutely amazing!! I already have hygrometers with room temp and relative humidity but I wanted more info. I wanted the dew point for a more accurate assessment of the indoor environment. And that's exactly whst I got! The room temp and RH match the other hygrometer readings within ~.5+/- degrees. Amazing! So I feel pretty confident with the accuracy of the readings. I am super happy with this product and would recommended it with confidence.

I got this to use as a calibration source for some mechanical hygrometers I want to test, to see if they even work at all. I need a portable unit to move around several buildings. This unit seems to work ok; I can't tell if it is accurate without setting up the tests, but after 30 minutes from out of the box and power-up, it was within a deg F of two other digital thermometers I have, and I've watched it track with temp changes up and down, maintaining the same relative differences with the other thermometers. It took a while for it to "settle down" to a temperature and RH; temp was several deg F off the other digital thermometers when I first turned it on, and took at least 10 minutes to stabilize the temp. It states +/-3F and +/-3%RH for the accuracy, so I guess it is operating within its design tolerances.Bottom line, it will probably do for calibrating my other analog hygrometers and proving whether they are working or not. Humidity is all relative, anyway.

I was looking for a reasonably priced calibrated meter that could be used to help determine the reliability of temperature and humidity of other devices and appliances. I had a hard time finding devices in this price range that specified that they were NIST (National Institute of Standards & Technology) certified, a benchmark for the reliability/quality of measurements. However, I was impressed that Protmex HT607 Temperature Humidity Meter literature did offer that the device could be evaluated/corrected by engineers for accuracy and reliability (via calibration). It is calibrated during its production.I have only had the Protmex HT607 Temperature Humidity Meter a couple of days, but it has met and exceeded my expectations. The device has done all it has been advertised to do and is quite responsive to ambient environmental conditions.I am currently conducting tests on my Ambient Weather Station Temperature/Dewpoint Array for calibration purposes under various conditions, and the Protmex HT607 Temperature Humidity Meter has helped me build confidence that my weather station array is at least within +/- 1 or 2 degrees Fahrenheit of other temperature/dewpoint sensor monitoring equipment.I am satisfied with the size of the display, the backlight, and the responsiveness of the meter. The meter seems to be durable as well.I have not received any consideration from Protmex and/or Amazon for this review. It is just nice to get a device that actually does what it is advertised to do.

Used to monitor dew point during astrophotography sessions. Shows ambient temp and dew point at the same time for easy differential comparison. Important to help adjust dew heaters and keep lenses from fogging over. Backlite works well. Readings stabilize in a minute or two.

I love it! It doesn't have to be perfectly accurate, I'm not using it for science. Just wanted something to be able to determine wet bulb temp in a very specific area. On line weather is fine for a general area, but I wanted to know the temp in a cooler woodsy area used for outdoor events. Great price and worked even though I didn't realize I needed to take the protective cap off....oops