I was battling high humidity in my flower tent so I got this little gem. Super simple to operate, and it has controlled the humidity within 10% of the set point. If the plants are happy I’m happy, and the plants are happy.

I bought a humidifier with a built in humidistat that never worked right and wouldnt properly humidify a room where I keep my guitars. Itd constantly shut off before getting close to the target humidity levels I wanted. Once I realized a device like this Inkbird humidity controller existed, I decided to try it. It took a few minutes to bypass the humidstat controller on the humidifier with a simple piece of wire. Now the Inkbird controls power to the humidifier and does a great job. I have a couple of hygrometers around the room and the Inkbirds onboard humidistat seems pretty accurate. Come summer when I need to break out the de-humidifer, this controller will be great since it has dual power options - one that providers power to something when humidity is too low and one to provide power when humidity is too high. Genius.

Great product, keep the humidity at the level y ou set

This device has worked very well in keeping the relative humidity level constant in a room where I keep my guitars (acoustic and electric). There is a good YouTube video that made the setup process easy (enter IHC-200 in the YouTube search). Im using this controller with the AquaOasis 2.2L humidifier. With this device, I am keeping my relative humidity at 50% +/- 3%. In seasons where the natural humidity level is already high, I dont have to fill the humidifier tank for days. It has my enthusiastic recommendation.

We purchased 1 initially to control the humidity in a 5x5 grow tent that was consentally either at >98% or <20% no matter how we ran our humidifier, fans, and exhaust fan. Received the controller and immediately set it up. We live in a very dry climate and have no need to use a dehumidifier in this particular tent. Set work 1 (again not using work 2) to 58% with an 8% range. And just like magic we had 48 hours of perfect humidity. Decided to buy 2 more for our flower tent and drying tent. Set them up and calibrated 1 because it was a little off. Almost immediately started having problems with our drying tent. Couldnt get it keep the humidity above 25% (even the unit itself was showing low) when the humidifier was plugged into the controller, but if we run the humidifier directly into an outlet it would climb up approximately. The flowering tent isnt holding the settings/% we program. It goes right back to default of 50% with a 5% range. Luckily its default is close to what we need, but we shouldnt have to be forced to keep it that way. It completely defeats the purpose of having this all together. Now, on day 5 we wake up to or our original controller in our vegetative tent not functioning and running to humidifier all the time. It was 99% in there, even though the controller is still show our 58% with 8% range. I tried changing it down to 50% and 5% and the unit goes right back to showing 58% and 8%. So, now we have 3 controllers and not a single 1 is working as it should. I am going to replace these 3 as defective and try again with their replacements but I dont have much hope that they will do what theyre supposed to do. Will probably end up with 0/6 and will update after the replacements get here and are set up.

I had to look up written instructions on google, and also youtube has a video guide on how to set humidity and dehumidifier ranges. Now this thing controls my humidity proper. I didnt have a dehumidifier so i used a fan to kick on to help exhaust humidity out of my grow area. Works great along with govee wifi bluetooth monitor.

Our initial goal in purchasing this unit was to maintain our terrariums high humidity levels, and to run a mister/fogger/water circulator when humidity dropped below 80%. Instead, this unit has spent most of the year unplugged and useless. This is due to the units inability to handle high humidity environments. If the terrarium reaches 100% relative humidity, the unit sounds an alarm. Note, this will tend to occur naturally in any high humidity terrarium when the air cools in the evening. Cooling will reduce the dew point until relative humidity hits 100% and condensation forms on the interior glass. If you have ever seen condensation on your terrarium glass, then you too, have experienced 100% humidity in part of your enclosure. Per the support response, there is no way to disable the alarm. The unit allows you to set a range up to 99% humidity, but if it crosses that threshold, *blang-blang-blang* The alarm sounds. (And personally, I dislike being awoken at 3am in the morning by a needless alarm.) When asked for the reasoning, it was explained that the unit does not handle 100% humidity because the probe is not waterproof nor designed for immersion. This answer clearly shows that the manufacturer has zero understanding of the basic principles of humidity, dew point, condensation vs immersion, nor fundamentals of natural science. We are left with two options... 1) Keep our humidity lower, putting all of our living creatures in our habitat at risk of it getting to dry. 2) Discontinue use and purchase another brand and model. (Obviously, we are going to go with the latter option.) This unit is fine for any dryer terrariums. However, if you have have a high humidity or tropical rainforest type terrarium, I highly recommend that you DO NOT buy this unit.

The sensor’s micro plug interface is not protected from moisture or high humidity 75%+ The connection will oxidize eventually “5 months” and this will cause malfunction. It is to small even for most experienced electronics experts to solder directly and I can’t find replacements. The controller module portion is great and seems well made easy to program after you figure out what the poor translation is saying.

I use it to control an old wick-type room humidifier. All I had to do was plug it in and plug the humidifier into one of the outlets (the other outlet would accept a dehumidifier so you could use both). The instructions for set up require a very close reading, but they are appropriate for the device. You set the desired percent-humidity and the differential; i.e., how far below the desired percent will trigger your humidifier. The differential was pre-set at five percent which was far too great; I re-set it to one percent, the minimum. Now the humidifier shuts off at 35.0% and starts again at 34.0%. The device has been running constantly for about a month, now, and is doing a perfect job.

Does not work the best to measure humidity unless calibrated somewhat often & for sure not as user-friendly as advertised. It helps to watch youtube videos and third-party materials to figure out usage.