AcuRite Humidity Meter Hygrometer and Indoor Digital Thermometer with Temperature Gauge and Humidity Gauge, Room Thermometer Comfort Scale, 3 x 2.5 Inches, White (01083M)

I bought this hygrometer for monitoring humidity for my new acoustic guitar.After so much research into finding an accurate hygrometer, I found this ACU RITE unit through one of the Amazon reviews for all the other "inaccurate units".This item is accurate and simple to use. It is also very easy to calibrate it after you test it. I do recommend that you test the unit so you know if it is on point. Recalibration is very easy and just follow the provided instructions.You should google the salt and water test for a hygrometer (which should come in at a value of 75% humidity) and the damp towel test (which should come in at 100% humidity. ) in order to determine if you need to recalibrate it.Recalibrate it if is needed (obviously). Mine came out of the box extremely close to the tests.The unit I received came in at 74% for the salt and water test and at 99% for the damp towel test out of the box.That is within 1% percent of the required test values. I did not recalibrate it since that is close enough for my needs.The air temperature part of the unit is also accurate within a few degrees Fahrenheit, based against a thermometer I have mounted near my guitars.For my use to keep my acoustic and electric guitars in the safe zone, this unit works.I am buying a couple more...THX

This review covers model AcuRite 01083M, two identical meters purchased in Sep 2018, about 2.5 months ago, $16.73 each. I like this meter very much, with time it became important part of my life. It did not happen before with my other gadgets that also displayed humidity and temperature.ACCURACY. Both AcuRite 01083M show identical readings all the time, with a one time exception during 10 weeks time frame: Humidity readings were 47 and 48% for a few hours at home, both units standing within 1". Other meters showed less or more than AcuRite 01083M at that time, likely due to poorer accuracy, poorer speed.SPEED. I noticed my other meters are very slow, compared to AcuRite 01083M, never agree - due to slow action. This is seen mostly when opening, closing windows in the morning, evening. With time I learned to ignore readings from other meters, presently rely on AcuRite 01083M only. It is both fast and accurate, made all other meters in my home obsolete.MAGNETS. Two 3/8" diameter back side magnets for attaching to metal surface are also very nice - and surprisingly strong. I hear a loud click when attaching to fridge door and can feel quite decent force pulling AcuRite 01083M to the door. I attached AcuRite 01083M to ping-pong table frame and let it hang on one magnet only - very strong hold!DISPLAY. It is very easy to read across a large room, very clear even at more than 80 deg. Later I started paying attention to High, Low readings and learned they are important to me. Somehow I did not pay a lot attention yet to arrows showing UP / DOWN trend - but may need them when meters put to bathroom or fridge. So far my home readings during last 8 weeks covered 15 - 60 for humidity, 65 - 85 for temperature. I see some improvement could be made to AcuRite 01083M: When temperature set to Celsius, two digits mean less resolution. Maybe display could be arranged slightly different, to make extra room for 3rd digit? Is it possible that 3rd digit is not desired for such fast meter, as rd digit would keep changing too often? MAN, MIN readings for both humidity and temperature are very nice addition, I check both very often.DIMENSIONS. Amazon shows accurately all dimensions. AcuRite 01083M is not very slim, changing present thickness from 7/8" to even 3/4" might make it look nicer. Some products on market have rounded edges to make them look slimmer. I think 7/8" is good because meter stands on flat surface very firm. And its weight is balanced well, no accidental falls expected.MANUAL. I appreciate very much printed manual that is very easy to read, no tiny characters and poor print quality often seen on manuals for products costing hundreds of dollars. Manual size is equal to two Letter Size sheets. It is easy to read, content is presented cleverly and thoughtfully. Model name on manual is 01083, while actual meter I purchased has 01083M printed on the side.BATTERY LIFE. Not sure about battery life for two AAA batteries, having AcuRite 01083M only 8 weeks. Manual while very good, nicely detailed - it has no battery life information. It would be nice to read something like - Typical battery life is 10 months, typical current consumption is .... mA. This product WILL / WILL NOT work with rechargeable AAA batteries. - I really wished to know such things. I took my trusted Fluke digital multimeter model 8060A, set it to read current, inserted test leads between batteries in battery compartment. I did this in front of the mirror, so I could see how AcuRite 01083M acted with current meter connected to it. Current reading was same 13uA on both ranges 200uA and 200mA. AcuRite 01083M kept showing exact humidity, temperature readings during testing, all this seen in the mirror. And display seemed to be as bright as before. I did not expect such good performance. So I took laboratory grade instrument and obtained identical readings 13uA. I calculated that AAA batteries rated at 750 mAh should work here about 6-7 years, too good to be true? Maybe my testing shows static performance, while AcuRite 01083M consumes much larger current as pulses spaced apart by 1 minute for example? I DID NOT INVESTIGATE THIS. Interestingly AcuRite 01083M displayed correct info INSTANTLY after batteries inserted, very nice feature - many other products on market show flashing screen, some big job is going on after batteries inserted. Some day I will test AcuRite 01083M with rechargeable batteries, will update this review.DROP TEST. During current consumption testing I accidentally dropped AcuRite 01083M a few times on hard surface, from about 1 foot. No visible changes to meter's surface, all readings remained, same AcuRite 01083M put next to the other unit gave identical readings within 1 minute. However I would not drop AcuRite 01083M on tile floor from 3 feet.MAGNETIC FIELD. It would be nice if I could put AcuRite 01083M on tall speaker without worrying if magnetic fields from speaker affect meter readings. Manual while nicely detailed, it does not show if AcuRite 01083M is sensitive to DC, AC magnetic fields. Maybe I will put very strong magnet next to one of two AcuRite 01083M I have and see after a few minutes if both meters read same?I consider AcuRite 01083M a clever and very thoughtful design. After 8 weeks of comparing AcuRite 01083M to other meters I have confidence this meter is right one for me. I plan to put one in the bathroom, where I expect to see more challenging readings. I am very happy with my purchase, consider it a bargain for what I paid.

Note - The product description incorrectly states that the number of batteries required is 2 AA batteries. It actually requires 2 AAA Batteries

As Advertised. Keeping my Guitars within the correct humidity limits

Seems accurate

I just received this unit and so far I really like it because it's very easy to operate and read AND it records the highest and lowest temps for the past 24 hours... it shows "trending" changes, too... which is one of the main reasons I got it... the humidity has been just awful here in central Florida this summer and I wanted to see trending humidity as much as I wanted to know the temperature... I also like that there is a color-coded bar that has an indicator arrow showing what range the current humidity falls into, "low, ok, or high"... it's a great little unit and I'm going to get a couple more, I think, to keep permanently in several locations... for inside the house where the air-conditioner is, and for the carport and garage where I have a lot of stored memorabilia and tools and also for the chicken coop... The only drawback to this unit that I can see is that if you move it from one location to another and there is a big difference in temperature, it takes awhile for the box itself to cool down or warm up to the new ambient temperature before it can start reading the new temperature correctly. When I took it out of the mailbox, the ambient outside air temperature was 95 degrees (in the SHADE)... so the temperature inside the hot, metal mailbox was probably about 110 degrees, the package was actually warm in my hands when I picked it up... I took it inside to an air-conditioned room that was 76 degrees... and when I immediately opened it and popped in the batteries, it read out 103 degrees even though the actual temperature where I turned it on was 76 degrees. It eventually read the correct room temperature and kept up with the changes okay... but later, when I took it out to the carport, the same thing happened in reverse... it was still reading in the 70's, even though the air temperature was in the 90's out there at mid-day... (I have a baby video monitor in the chicken coop that reads new temperatures immediately whenever, and wherever, it is moved.) I think this "lag time" is a drawback if you plan on moving it to different locations during the day as I had initially planned to do... The humidity meter seems to change much more quickly. All this being said, I LIKE the unit... Another really great perk is that it has magnets on the back (in addition to screw slots for wall mounting) that are very strong and the unit grabs on instantly and securely to anything metal, so it's VERY easy to put it and then take it down again almost anywhere that you want to monitor the temperature and humidity. It clicks right onto file cabinets, metal carport posts, lamp posts, cage wire, the metal baskets around fans, etc. The "24-hour log" can be easily reset to start over again immediately, too. I haven't even had this 24 hours, but so far... I am VERY happy with it... I only wish it would adjust faster when moved, but maybe it's really designed to stay basically in one location. It would also be nice if it lit up in the dark, too! The information booklet is VERY well done, it's simple and clear and easy to read with nice-sized bold print... it lists the website and support information (www.AcuRite.com) I just went to the website and it is chock-full of ALL KINDS of sensor equipment for temperature, humidity and weather stations, etc. GREAT STUFF! I think before I order more of these units, I'll check out their other products first... since I live in hurricane country, their weather stations looked pretty interesting... and they also have lightning sensors, too!

Very accurate device