Desiccant (8%)

Antifogging in environmentally protected military grade LCD/EL/OLED displays that need to operate in extreme environments over long periods with large temperature swings over a 24 hour period without having to recharge over the estimated mean time between failure of the display - say 3-5 years. If you can keep a unit dry over that period with a dessicant that drops the dew point below -10 celcius then you have a usage and a market that currently employs a battery of alternate methods which don't work over the mtbf.

Hi Guest,

Thanks for your advice. Do you know how they do to protect the military grade LCD/EL/OLED display? Where can I get the specific requirement ? Thanks.

Medical Device, Medical Research, or Pharmaceutical industry. I currently specified a desiccant container purchased from VWR.com to maintain a moderately low RH for a specific product. We also have several in labs.

Pharmaceuticals would definitely be interested in such a product if cost effective in comparison to established desiccant technologies. Product packaging comes to mind. It all depends on cost, toxicity, material handling and shelf life.

Also the electronics industry with respect to component materials that are sensitive to exposure to moisture.

Hi Thrudd,
Thanks for you information. What is the humidity range the pharmaceutical industry needed ? How they acheive it right now? Do they have any unsatisfaction with current desiccant ?
Nattone

Hi All About M.E

Thanks for your information. Could you tell me how do you choose a desiccant ?
Considering
1) brand, 2)function specification, 3)convenient to use, 4)cost, 5) rely on actual performance evaluated from samples or ... ... ?
Nattone

My requirement was for something to hold ~50 lbs of powder ≤ 35% RH on the production floor to be accessed about once/week. I also wanted something that did not require any changing of desiccant. I ended up purchasing 2 Secador 4.0 Auto-Desiccator Cabinets from VWR. Here is some of my reasoning:

1. *****Auto Desiccant feature *****(no concern with desiccant changeover)
2. Size was OK (Floor space is a premium in our lean environment)
3. Stackable (I may end up needing another one)
4. Easy to transport (Between a Lab and Production)
5. 110V Power
6. Hygrometer included in the cabinet. We had to recalibrate it to the range we were concerned with, because it is not accurate from 0-100%. We know it is accurate over a range of at least 20%, so I used the number I wanted it to be less than or equal to and calibrated it to ±10 of my nominal). I was unable to quickly find a better Hygrometer that fit into the space alloted.
7. Inexpensive ~$750
8. Off the shelf (received ~2 days after purchase)

I would have preferred one that could reduce the RH much more, so I could extend the shelf life of the powder I am using.

I hope this helps, let me know if you are able to do something along the line of an Auto-Desiccant Container reducing RH ≤8%. There may be an interest from one/some of our labs. Good Luck.

Hi All about M.E.,

Thanks for your information. I understand your need.

Auto desiccant cabinet is one of my development direction. Secador 4.0 can only provide low humidity environment inside the cabinet but cannot dry up sample. I hope my cabinet can do both keeping dry and removing water from samples.

Can you leave your email so I can contact you later.

b.regards

Nattone

soundtone@yahoo.com.hk

jaf_llf@yahoo.com

I use a reusable lab grade dessicant for storing seeds and mushroom spores. They are used frequently in microbiology.It is also useful for drying mushrooms and fruits, but i much prefer warm air flow for drying. The problem is often you cant use enough dessicant to dry things efficiently before they start to rot.It also requires constant monitoring and changing of the dessicant.

The one i use is called Drierite. It changes color when it is saturated so you know when to change and re-dry the dessicant.

Thanks for your useful information.
Warm air flow is effectively way to dry up things. Usually, how long will it take for the drying process? Elevated temperature is not your concern, does it? There are a number of electronic humidity control cabinets. Can they fulfil your need ? Microbiology field is one of the fields I am interested in. Could you give me more information about application of drying things. You may send to my email: soundtone@yahoo.com.hk
Thanks.