Product review (5 stars): Beware of the issue
I don't think the cost of this meter is too high for a quality meter that measures dew point and wet bulb, and has a one year warranty.

I contacted Fluke and asked what they attributed to the fact that some technicians have major gripes about the instrument. The Fluke representative of course explained that no meters with the same capability and that also have the safety approvals and certifications for Europe, USA, and Australia  are in the price range of a hygro-thermometer that merely provides ambient readings. More on this conversation below the next paragraph.

If all you need is a really good thermometer-hygrometer for inside the home, go with this one&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Extech-445715-Big-Digit-Hygro-Thermometer/dp/B000NI4AQY/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Extech 445715 Big Digit Hygro-Thermometer</a>:  I have two of these Extech units and never had one problem with them. They guarantee a high level of accuracy.

An important issue with this Fluke temperature humidity meter is that you have to keep the sensor's protective shutter closed when not in use. Fluke apparently thinks that's what happens to meters that need calibration before their time but even so will honor its warranty for one year. After that, it's not worth calibrating because the cost to calibrate just one is close to the cost of a new one with a new warranty.

My readings were identical to my Extech for ambient temperature and humidity.