I have been using a DIY - "put everything in a plastic box with a few packets of desiccant aka silica gel and a Daiso hygrometer" type of dry box all these years since I dont have a lot of equipment and all of them are just small mirrorless body/lens. The problem with this is that every time I open the lid, the RH changes and I cant seem to recharge the silica gel even after putting them in the Sun. But they are cheap to use, only Rm5 for a few packs from Daiso. And another problem is my Daiso hygrometer is not exactly calibrated.

The model is HD-40G. Its a 32 liter box. I wanted the smaller model AD-20 as I dont have much space in my small apartment but they dont import that model here.

As I googled, I found that there are two types of dry box using different technologies - One uses an electronic Peltier cooler which removes moisture from the air by condensing it out. The other uses a multi-porous molecular sieve desiccants to adsorb moisture and then it is renewed by a heating element to expel the moisture. The Eureka is the latter. Both have pros and cons so google it to find out which one will work better for you.


I placed my box at my pantry...haha. Its a small box. You can see I am comparing the analog hygrometer with a digital one from Stadler Form. The difference is plus minus 3% so its okay. I took the opportunity to test my Daiso hygrometer and they are like minus 5% off. Still not bad.


The calibrated analog hygrometer that comes with the box. Glass door is tempered and it has a lock. I dont see any point in locking it unless you got kids etc.


The whole working mechanism is just this thing and if it is spoiled, you can take out the four screws and the whole thing will come out to be replaced or repaired. As you can see, there is no power brick, it just plugs straight into a AC socket.

You have to turn a knob inside and its pretty much trial and error to get the percentage of RH you want. It uses about 4 watt per hour. Even if there is a power cut, the dry box can still maintain RH if you dont open the door.

This post has been edited by idoblu: Jan 2 2017, 04:59 PM