Humidity for camera - need advise

[Istar]

Running on plug. I bought it from imm.

 

[rhino123]

Running on plug. I bought it from imm.

Don't worry too much about it then... the bottle of silica gels can be very useful... like what one of the bro had said. Find an old sock (not smelly one hor) and put the silica gel in, then use that as a dehumifier when you carry your gears around for a shoot.

 

[Csboi]

Don't worry too much about it then... the bottle of silica gels can be very useful... like what one of the bro had said. Find an old sock (not smelly one hor) and put the silica gel in, then use that as a dehumifier when you carry your gears around for a shoot.

:thumbsup:

 

[Bukitimah]

Dear Spree86, the humidity in your dry cabinet works on a heater just like your piano. The other way to control humidity is via cooling.

If the room humidity is high, your dry cabinet need to works harder. Or rather the heater needs to be switched on more often to maintain the RH.

I am not sure of low RH effects on rubber or grease. I would imagine high or low temp will.

 

[ZerocoolAstra]

Dear Spree86, the humidity in your dry cabinet works on a heater just like your piano. The other way to control humidity is via cooling.

If the room humidity is high, your dry cabinet need to works harder. Or rather the heater needs to be switched on more often to maintain the RH.

I am not sure of low RH effects on rubber or grease. I would imagine high or low temp will.

From what I understand about modern dry cabinets, they have a condensing plate which is slightly cool to the touch, and attracts moisture from the air inside the cabinet. The moisture is then brought out of the cabinet and evaporated.
I can imagine that ambient temperature and humidity will have an effect on the efficiency of this process, though this being the tropics, temperature fluctuations are minimal, and humidity levels are pretty steady as well.

moisture in the air helps to maintain the elasticity of rubber, and also the viscosity of grease.

 

[Octarine]

Dear Spree86, the humidity in your dry cabinet works on a heater just like your piano. The other way to control humidity is via cooling.
If the room humidity is high, your dry cabinet need to works harder. Or rather the heater needs to be switched on more often to maintain the RH.
I am not sure of low RH effects on rubber or grease. I would imagine high or low temp will.

What kind of heater are you referring to? It's a Peltier element and the cold side is facing to the inside of the cabinet. This cold surface causes condensation, the water is then channeled out of the dry cabinet. This approach will even lead to a slightly lower inside temperature of the dry cabinet.
Here a very good thread about the technologies used: http://www.clubsnap.com/forums/threads/481380-Sharing-my-research-on-DRY-CABINETS.

 

[catchlights]

yes, it is not by heating the air, touch the dehumidify unit at the back of the dry cabinet you will know, and also if you put your hand inside the dry cabinet, you can feel the air inside is cold and dry.

 

[Bukitimah]

Hmmm I did mention control of RH is either by heating or cooling. If you understand the PH graph. No new innovation I have come across.

 

[spree86]

Dear Spree86, the humidity in your dry cabinet works on a heater just like your piano. The other way to control humidity is via cooling.

If the room humidity is high, your dry cabinet need to works harder. Or rather the heater needs to be switched on more often to maintain the RH.

I am not sure of low RH effects on rubber or grease. I would imagine high or low temp will.

Like others have said, I understand that the dehumidifier does not heat up the interior to maintain the humidity. Maybe you are thinking of other versions?

 

[ZerocoolAstra]

Hmmm I did mention control of RH is either by heating or cooling. If you understand the PH graph. No new innovation I have come across.

I guess the main debate is about your point below:

I think the room humidity will affect that in you dry cabinet. Mine was around 30+ and it dropped to 25% recently. I have it adjusted up to 30% again. Personally I think 30 - 50% is ok. I don't think there are any parts that can be damaged by humidity. The only consideration is temperature which control humidity.

Do correct me if I am wrong.

Whilst I do agree that these 2 variables are not totally independent of each other, it is incorrect to say that temperature controls humidity. A dry cabinet is a classic example of a closed environment which has a drastically reduced RH, and yet the temperature inside the cabinet is not significantly different from the temperature outside.

 

[Astroben]

Running on plug. I bought it from imm.

Then no need to add silica gel.
If yours is analog drycab, set knob to ard 12pm position. Let RH stabalise for a few days and adjust to repeat cycle until desired RH us reached. Some members have different settings, i let mine stabalise at 11pm, RH ard 41%.
For digitally controlled drycab, I read u just need to set in the number and that's it. Let it do the job for u.