best tool for wet bulb for package units?

[ats890]

What are you light commercial guys using for wet bulb on package units would like something accurate with small probe to only drill small hole in in return panel tired of using sling in store

[ryan1088]

Cooper SRH77A for me. Great instrument or temperature, humidity, and wet bulb.

[AndyBarnum]

I have the same Cooper & I agree with ryan

[chuckcrj]

Fieldpiece SRH3 is what I use.

[jimj]

Fieldpiece SRH3 is what I use.

Yup me too.

[ats890]

Have you found srh3 to be reliable and accurate

[chuckcrj]

Have you found srh3 to be reliable and accurate

I've had mine for 10 months and no problems so far.

[spark]

Fieldpiece SRH3 is what I use.

X3.

It's a nice tool and I've found it to be reliable also.

-Mark

[hvac5646]

Got a Fieldpice and a Bacherach sling. It's advantageous to double check your instruments at regular intervals..

[chuckcrj]

Got a Fieldpice and a Bacherach sling. It's advantageous to double check your instruments at regular intervals..

This is true. Do you find that the Fieldpiece stays accurate compared to the sling?

[Brent Ridley]

I use the Testo 605-H2.

http://www.trutechtools.com/Testo605H2

I drill a 1/2 hole using a step bit and insert the probe thru the panel. I plug the hole when complete.

[hvac5646]

This is true. Do you find that the Fieldpiece stays accurate compared to the sling?

Well my sling is a hand-me-down and is pretty old, so it uses mercury filled thermometers which need no calibration (but the accuracy is as good as it gets in a sling).

On a FP digital K-type WB thermometer the reading are as accurate as long as you keep it calibrated.

[hvac5646]

I use the Testo 605-H2.

http://www.trutechtools.com/Testo605H2

I drill a 1/2 hole using a step bit and insert the probe thru the panel. I plug the hole when complete.

Yeah, I got that WB instrument this winter. Be using it this summer for the first time. But I did experiment with it when it first came. The rubber cone I have with it holds it in place in the duct.