PuroTemp Rectangular Digital Hygrometer – Digital Thermometer with Humidity Sensor – Temp and Humidity Monitor for Humidor, Easy to Calibrate, Fast Refresh Readings, Lightweight – Black

The hygrometer arrived about 10 days after I ordered it. What I liked about it was that it was ready to go out of the box--no need for calibration. The unit is powered by a small "button cell" battery which is provided. The dimensions of the unit are: 3.375 inches long x 2.125 inches wide x .375 inches deep. The unit is made to be mounted vertically on a flat metal surface (like a refrigerator). There is a metal mount with adhesive backing which allows you to mount the unit to a non-metal surface. The only downside to this little hygrometer is that it does not have a little stand in the back which would allow you to prop the unit up on a nightstand or table (like a picture holder). The picture of the item on Amazon leads you to believe that you can prop this up on a level surface, but you cannot. Functionally, the unit has worked very well, with humidity levels increasing when we use a humidifier and falling when the humidifier is off.

Of all the electronic hygrometers commonly found on the market, I still believe this is the best. Reliable, simple, and durable, I've been using it for years and it has never failed me.

Checked the device using the salt method and closed it in an air tight container I use as a tupperdore. Ordered two, one was 3 degrees off on humidity and the other was 2. No way to calibrate this model, so I suggest you check and use a sharpie to write down the offset on the device. Otherwise works well, temperature dead on.

I purchased this unit for its ability to be calibrated, and its statement that it is accurate to +-2%. I had the same problem that several others have reported. It will not hold its calibration. Should be able to just pull the battery so it will be able to reset itself, put it in a baggie with salt + water in a bottle cap, wait 4 hours, and push the calibration button. So far so good. However, in 60 seconds it reverts back to its uncalibrated reading, which was 6% too low. This one is going back.

After using it for a while, I found it to be an excellent product with very high quality and accuracy.

Bought a humidor for my father. It already had a digital hygrometer built into the face, however this was reading all over the map. Calibrated this with the simple included instructions and now he has every confidence that his humi is just fine. It has a three button design which allows you to calibrate it to the 75% humidity of a salt/distilled water environment. The second button is a Ferinhieght-Celcious selector for the thermometer. The third button is a nice Min / Max feature to let you see how stable you humidor is. It's about the size of a credit card and 1/2" thick so it doesn't take up much room (yet still more than a round hydro.) It includes a magnetic mount so you can mount it to a lid if you choose. It registers changes within a couple of seconds. So all in all a great buy! Update March 2013: My fatehr admits that this was his fault. He spilled a small ammount of distilled water into the unit. He immediately removed the battery and allowed the unit to air dry for a couple of days. However, after reinstalling the battery and calibrating the unit it started reading some insane readings. It would jump from 90% Humidity and 199 degrees F to 5% a 10 degrees. This unit was toast. I disected the device and looked at the PBC. I see so outward signs of shorts or corrosion on the PBC, so likely the water damaged the microcontroller. Now I've taken this from 5 stars to 3 for two reasons. We recalibrated the unit once before and like others have stated it didn't didn't read quite right, it seemed to be 5% high or low comparied to other hygros. The second reason is after taking this thing apart I was not impressed with the placement and attachment of the sensors. I've posted a pic in the main description page. I've got to say it's more feature packed that other units with min and max displays showed optionally and simultaniously in the main screen, however due to it's fluctuations and some other problems I've had with the Xikar brand, my father and I have simply lost confidence. I liked this unit while it worked and would've replaced it with the same model, however with it's couple of quarky faults, I've decided to switch to the Caliber IV.

Worked very well for 2 months. Now it constantly reads 10% over actual humidity. This is a newer version that can't be calibrated either.

It's accurate with no calibration needed.

Does the job well. Cannot quote the accuracy but from reviews this is one of the best at its price.

Xikar rappresenta il meglio in assoluto, preciso e funzionale per chi cerca igronomi e termometri per Humidor per sigari. Arrivato con ben due giorni di anticipo. Amazon come sempre leader in tutto .

Best hygrometer gt far, I know my cigars are safe..

Das Hygrometer misst sehr genau und mit der Qualität und Verarbeitung bin ich sehr zufrieden. Im ersten Moment erscheint der Preis vielleicht etwas hoch, für eine genaue Messung sollte das aber investiert werden.

Excelente producto!