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Dry & Dry Humidity Indicator Card is Premium Quality.
It is strictly tested for clear color change
When you initially open the card, all dots sometimes react and change color because they are exposed to sudden humidity. If you wait for about 30 minutes, the card will calibrate and you will be able to read the humidity level. If 10% dot is pink and 30% dot is blue, and 20% dot is lavender, then the humidity level is about 15%. If the 30% dot is pink, it is time to change the desiccant. The humidity card itself is reusable. When the humidity level is low, the dots will change from pink to blue again. With long use, the color of the dots may faint. Then, you can replace the card.
DRY & DRY - PREMIUM QUALITY
Our Humidity Indicator Card is the highest quality in the industry for Humidity Measurement.
It is strictly tested for clear color change in each Humidity Level(10%-60%)
You can experience a big difference compared to other products.
Products of Dry&Dry guarantees 100% satisfaction.
If you have any problems about our products, we will give you a free replacement or full refund.
joshua
Reviewed in the United States on March 9, 2025
Damn near worthless. The color change is so subtle that it's almost imperceivable to see any change within a 20% change in humidity on this indicator. The digital display has humidity in upper right corner indicating 41% humidity. Do you see any difference in color shades of the dots on the humidity indicator strip? I can barely see a change in the pink shade at 60%, but it's definitely nowhere near blue. The error margin on these humidity indicators is at least 30%, but could be more.
Mat F
Reviewed in Australia on February 15, 2025
Pros: Easy-to-use moisture level indicators that change color accurately. Great for storage, electronics, and collectibles to monitor humidity. Comes in a 50-pack, offering good value.Cons: Single-use, so they can’t be reset after exposure. Needs to be stored properly to avoid premature activation.Verdict: A handy tool for tracking humidity in sealed spaces. Works well, but best if paired with proper moisture control methods.
M. Kobb
Reviewed in the United States on September 2, 2024
These strips work well and their color change seems to agree pretty well with a digital hygrometer in the same container. It's also important to emphasize that they will change back to blue if the environment becomes drier (e.g. by adding desiccant).The only complaint have is that in the range of 10-30 % relative humidity, it's hard to see the color change. Rather than turning bright pink, a couple of the dots will turn "lavender". When the humidity is significantly higher, like 40-50%, then the lowest dots become clearly pink.See my photos. The strip sitting out on the table has clearly pink circles. This was a humid day around 50-55% humidity. If you look at the strips sealed in the bags, you can see that the one on the left has clearly blue circles, but the one on the right has a couple that are "lavender". If you didn't have the blue to compare against, it would be hard to see that difference.So, if you need more accurate readings in fairly low humidity, those little digital hygrometers may be a better choice.The Dry & Dry company, by the way, has responsive customer service. I originally ordered a product that claimed to be made by them, but it was not. I contacted them to confirm and got a reply within a day. I will continue to use them for desiccants and related products.
Customer
Reviewed in Canada on August 8, 2024
I put these primarily in containers holding moisture sensitive materials, but I also stick them on the shelf in my work shop to keep tabs on the room humidity. Simple to use and last a really long time.
PaulH
Reviewed in the United Kingdom on May 4, 2024
Using these for 3D printer filter in vacuum bags and they work really well. Take a little while to colour change to ambient humidity but they are a great option to check on humidity in long term storage
Customer
Reviewed in the United States on November 23, 2024
Use these to check at a glance to make sure your dessicant protection is still good..You'll know as these change color in the presence of dampness They're NATO quality & cheap
Senior Villager
Reviewed in the United States on November 21, 2024
color turns back and forth as long as there's moisture level change.
D
Reviewed in the United States on October 31, 2024
I love these things. Use in multiple areas for 3d printing filament monitoring. (I use a lot of Nylon filament) and just tape to the inside (facing out) on storage containers and driers. I can easily see the humidity inside without opening.
MartyK
Reviewed in the United States on October 17, 2024
These are great! I have them placed everywhere I have a concern about humidity and they're working great. I've even put them in a warm oven to recharge them back to a strong blue. I'm not sure why I didn't get them sooner.
berzley
Reviewed in the United States on October 15, 2024
They work so well I thought "pink" was the dry state. Found a moisture issue right away. Silica packets and dehumidifiers are now solving some major issues.I have board games and guitars stored in my finished basement. It is still damp in the summer and these have been great at identifying issues quickly.
Torsten aus m
Reviewed in Germany on August 31, 2023
Qualität preis Leistung stimmt einfach alles
Mark J.
Reviewed in the United States on August 11, 2023
I have a host of 3D filament spools and like to store them all in dry storage boxes, some are used infrequently and I'll store unopened spools as well. I bought the cheap $2 humidity sensors but they won't register below 20% and can't be used for really dry environments. These moisture indicating strips are cheaper and more accurate. They are really designed for dry storage measurements. The only downside is they are hard to read and it takes some "practice" to translate the lavender color to moisture value. I initially used a lab grade sensor as a reference and added it to some boxes with a strip to help me understand the color shift. I'm used to seeing the mostly blue dots and can pretty easily tell when the desiccant needs to be recharged. These are much better at monitoring dry storage than the cheapo humidity gages and I highly recommend.
John
Reviewed in the United Kingdom on July 19, 2022
the first oreder 'got lost' but i received a credit and ordered again...but the price had gone up! the spots eem to react to the humidity quite well, but the colour change is not terribly clear, quite suntle really.
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