100% HR measurement

[galogabo]

Maybe it is not the correct place to post.
I have a closed test chamber. 700 mm W 530 mm H 630 mm
deep

I need it to be 100% HR at 41 °C +/- 0.3 °C

No incoming or out coming air .

The chamber is loaded once with material to test for up to 72 hours, open the door is avoided.

It have a internal blower , air is routed to perforated pipes submerged in water where the shielded resistance heat the water, so the air bubbles in the water.

A PID controller , work ok for the temperature show from 40.9 to 41.1 °C.

My query .

How I can measure the 100% HR.

Small opening can be made to locate sensor.

I also think to make a secondary small circuit by a small blower to route air from the chamber , trough the sensors and route inside the chamber.

Any help will be granted.
Thanks in advance.

 

[IRstuff]

I'm not sure what you're asking for. You get a humidity sensor, run its wires to the outside, and measure the humidity:

http://www.omega.com/toc_asp/subsectionsc.asp?book=Temperature&subsection=Hu04&flag=1

TTFN

FAQ731-376

 

[KiwiMace]

Given that most RH sensors are rated non-condensing, you might want to just use a wet bulb thermometer and read the RH from the Psych chart.

 

[DrRTU]

You will need to choose the accuracy of the system. Vaisala has excellent units

http://www.vaisala.com/instruments/products/humidity