Saturday, January 24, 2015

Review of IMAGE® 110V Digital Air Humidity Control Controller WH8040 Range

IMAGEĀ® 110V Digital Air Humidity Control Controller WH8040 Range 1%~99% RH HM-40 Type
Customer Ratings: 5 stars
List Price: $59.99
Sale Price: $29.09
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This little device seems to work very well. It is smaller than I had imagined it to be. It does exactly what it says it does and is configurable so that you can set a certain rH as well as a range that it can fall to (or rise to) before the relay kicks on. This helps to keep the relay from kicking on and off every few seconds. It also has a delay feature that would accomplish the same thing I assume, but I have not tried it. It seems accurate, maybe 3 or 4% below my cheap digital hygrometer, but it is calibratable +-5%. It can be set to humidify or dehumidify.

The only difficult thing is hooking it up; you need a 110v power cord hooked into the rear screw terminals to power it. To hook up a device your best bet is to make a small enclosure and put an electrical outlet and the humidistat into it, wire the white wire of a power cable to the outlet and the black wire to one side of the relay terminal then the other side of the relay to the outlet. This is assuming that you are using an appliance with a standard 110v appliance.

I use this for mycology but it would work well for terrariums or attics/crawlspaces too.

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Does exactly what is supposed to do .. Great price . I use it in an incubator for dry Cure sausage and salami

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Hooked it up and it seems to work as described. It's measured value in the 65-75% range agrees with the reading from my room dehumidifier but reads 8-10% higher than the hygrometer in my weather station. Been using it for the last couple weeks hooked up to an electrostatic humidifier and so far so good.

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Great Buy, exactly what I needed to measure relative humidity very rapidly, will order more when I need them for my dryers!

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I don't have an external calibrated meter to check it with, but the device seems accurate. I am using it for a large humidifier and it has been working great for me.

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