SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration

This is a solid little unit that provides helpful/accurate information. Easy to read numbers and graphs, and even has a light when neeeded! I had no idea how little indoor humidity I had in the winter time until I got this. Now I'm easily able to guage/achieve a more healthy indoor environment. A must have for cooler/cold climates. Would purchase again and am considering giving as a useful gift.

I set this in my humidor and it took a couple hours to reach the rh level of the humidor. I have a couple of other brands in there already so I know what the temp and humidity should be. I calibrated it once it reached the temp and humidity I knew was in there. 3 hours later cigars are 68 temp and 66 humidity. Holding the numbers solid. However, if I leave the door open too long and the rh numbers drop, it will take it a few hours to settle and read the proper rh again. I mean it creeps back up on the display. Nevertheless, it is working very well.

I do wish they had an option that put the temperature in BIG NUMBERS and the humidity in small numbers, so loses one star for that for our needs anyway. Well, it is sold as a hygrometer, not as primarily a thermometer, so... Comparing with an expensive pro thermometer, it was spot on.

Works great. The size is perfect for the countertop. Small but very easy to read.

Easy to setup and use. Bright display (when activated). Large display characters. Seems well made. Flexible mounting options: integral tilt stand, magnets and wall hanging slots. Does not require or include Bluetooth or WiFi, passive monitoring only, perfect for periodic manual checks of temp and humidity. Using to verify proper operation of home HVAC thermostat temp sensor.

Have needed this forever. Works great, gives me a more accurate read in the house (which is a metal home). Shows temperature and variations. Has easy to read "humidity" section. Did not realize it had a magnet until I put it close and it basically jumped out of my hand to the wall...so I can guess it is a good one...Worth the money. Have not used the bluetooth and probaly will not.

I’ve had 2 of the Smartro SC42’s for 4 yrs now one in my rifle safe & one in my Large pistol safe. They are Excellent & Accurate. It’s such a piece of mind to open your safe & know the Temperature & Humidity are where they need to be. If one of them ever fails I will replace with the same meter. I love knowing the guns are being stored properly. A must have for owners of multiple firearms.

This is one of those useful devices that demonstrate their utility from the first day. I just installed a humidifier in our HVAC system, and I wanted to monitor the humidity throughout the house. I bought several devices to determine whether the humidifier was distributing moisture evenly around the house. Setup was easy; I lined up four of the hygrometers and compared readings; they were nearly the same, which was easy to correct for the variation. Then I placed them around the house. While I have no idea how long the batteries will last, I am sure that it will be adequate. I highly recommend these hygrometers.

I use it for keeping my acoustic guitars at the right humidity levels (40~50%) which need an ajustable calibration offset controls (use humidity pack for control reference). Works fine and nice to have a readout backlighting when needed… (Cheaper hygrometers have no controls and can often be inaccurate up to 10%…)

I brought one checked it via a salt test bang on 75% brought another same as bang on 75%. Very pleased with the accuracy, very easy to use & has a decent magnet to hang up. to verify if your meter is correct put it in a plastic container with a cap filled with salt add a very small amount of water to the salt so you can still pick it up & it doesn’t run, seal it properly leave it a full 24hrs and it should read 75% if not it’s out & needs calibration )

He tenido muchos de estos y este es muy preciso, además se ilumina al moverlo, vale la pena el dinero q vale.

Working great so far and I’ve had for a few months now. Accurate measure and backlight is very bright but not blinding. Great display and easy to read.

Ottimo igrotermometro. Alla fine ne ho acquistati tre…. Dopo averne resi due di altro produttore che non ho trovato affidabili e che non permettevano la calibrazione se non in un piccolo range ristretto, inutile nel mio caso. Mentre questo permette una calibrazione senza vincoli !!! Ottimo prodotto.