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## Wet bulb thermother

What would be the best wet bulb thermother? I heard 605-H2 is pretty good!

2. I use a Cooper SRH77A, can't comment if it's the best but I like it just fine!

3. Might take a look at the Fieldpiece SDP 2 dual probe. Wet bulb Dry Bulb and reads out enthalpy and delta enthalpy/ Looks promising.

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Fluke 971 works good for me

5. Originally Posted by Thatotherguy
What would be the best wet bulb thermother?
A wet bulb thermother sounds like a hot mama in a wet t-shirt contest. Oh, you meant thermometer.

6. hvacrmedic, you once explained

what the +1 digit meant in pressure accuracy. Could you explain again or help me find the older thread.

7. Originally Posted by penderway
hvacrmedic, you once explained

what the +1 digit meant in pressure accuracy. Could you explain again or help me find the older thread.
That means that the digit to the far right of the display can be off by that much in addition to the percentage of possible error listed.

8. Ok so in addition to the % possible error, a reading of 1.15 can be off by 0.05 or is it 0.01.

In other words, do we disregard the least significant digit altogether or just by one value?

9. Originally Posted by Thatotherguy
What would be the best wet bulb thermometer? I heard 605-H2 is pretty good!
If you are going to do heating efficiency calculations for the new standards for rebates make sure that it will do temperatures above 100 degrees. Some do not.

10. Originally Posted by penderway
Ok so in addition to the % possible error, a reading of 1.15 can be off by 0.05 or is it 0.01.

In other words, do we disregard the least significant digit altogether or just by one value?
Off by 0.05 would be +/-5 digits, Off by 0.01 would be +/- 1 digit (which I haven't seen at that resolution). Usually when you see +/- 1 digit the resolution is only 0.1, and would be equivalent to +/- 10 digits with a resolution of 0.01.

11. Originally Posted by Skyhawk07
I think SRH77A is really good. I have good experience to use this one.
It is better than 605-H2 and have some good usefulness advantages.
You can opt it easily.
For air conditioning checks it's very good. However if you want to do heating BTUH calculations the temperatures will be too high and it goes out of range.

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I have a used testo wb thermometer

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I have used the Testo Humidity stick, which I believe is the 605-H1. It looks exactly like the 605-H2, but it runs on AAA batteries. I believe the H2 runs on button cells. They may have changed due to poor battery cover performance. Mine has been draped in blue masking tape from day one to keep the batteries from popping out. After you are done being ticked off about the batteries and duct tape on your expensive new toy, it works pretty well.The H1 is compact and great for shoving in a grill or drilling a hole in a plenum and dropping in. My unit is dreadfully slow at registering temps, but I have no comparisons. If you stick it in a grill to get a temp, come back in 5 minutes.
I recently thought about buying a new unit as my old one is getting pretty ragged, but when I saw that the new ones were those infernal button cell batteries, I canceled the order. Anyone had any luck with the button cells on the new Testo?
I recently bought a Fieldpiece Humidity stick. Can't remember the model, but it is a pen sized unit that displays rh/wb/db. Runs on a single AA or AAA Cost was \$66 and the display is very small. WB/DB are measured in full degrees, not tenths. In my opinion, it is the wet bulb equivalent of the fieldpiece pocketknife style thermometer; You are cursing while you're using it, but glad you have it over nothing.

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