TFA Electronic Thermo-Hygrometer

Accurate little hygrometer. I love the min-max setting.
Smaller than I expected but that means it fits in any case, even ukulele-hardcases.

Smaller than I expected but seems to work well. I use it inside my acoustic guitar case. The only issue is its hard to make it stick to anywhere in the case. The sticky pad that comes with would be fine for your room but its a problem sticking it to fur in your case. I added velcro and still have an issue. But thats no fault of the device.

This little hygrometer does the job well - and best thing is it can fit into any guitar case. The battery lasts for a long time, and the unit is reliable.

I bought this to store in my guitar case. The humidity level displayed changes quickly and it's accurate from what I compared it to . I did not stick it with the double adhesive tape because it might hender the sensor accuracy and I might have problems changing the battery if it's sticked . I just leave it in the case and store it in the case compartment if I move the guitar around. Good product overall.

I bought this for a violin case and this Thermo-hygrometer is very accurate and fast. It will let you know in an instant what the temperature and moisture percentage are.
The only negative I can say is that it's hard to attach to your case to secure it. I use a small Velcro strip which works great!

Got 4 of these and only 1 is deviating from the other 3.

Bought two of these and they both agree with each other on relative humidity to get within a percent or two, according to my calculations based on the larger analogue TFA thermo-hygrometer I ordered from Thomann at the same time and calibrated using the salt method.

This hygrometer works perfectly.
the humidity is 70% in my house. I use a ksb guitar case in which i put silicagel and this hygrometer. I check regularly not to be too high or too low in % of damp. I stabilize at 48 %. Whith a guitar of quality this tfa is indispensable.

It fits nicely I'm my shaped violin case. I compared the measurements with other hygrometers I have and It seems to be very accurate. I really recommend.

This little device fitted in your instrument case will provide an instant view of humidity in and around your precious possession. It provides a solution to the potential to cracking and damage to finish caused by damp. Well worth the investment of a few pounds.