Digital Pocket Psychrometer - PRH2

[ORV]

I was looking into buying one of these. Do you all think this would be accurate enough to set a charge? Something quick and easy like this would really be ideal.

Imagine if a manufacturer made one of these that also took ambient, press a button, and calculated superheat right before you. And all in your pocket.

[Rickeyc]

I think im gonna try one.

[Greend88]

I love the PRH2 it's pretty good and I carry it almost everywhere at work. 1/2" Unibit on my 1/4" impact lets you take quick in-duct readings. You can get by with 3/8" on the hole but I prefer the 1/2" lets it set a little better in the duct. It's a little sluggish on readings but fast enough for me. And ya can't beat the price tag on them.

[CommtechinVA]

First one lasted About a week. Got it replaced under warranty. Bought the Testo 605 so haven't been using it much. Pulled it out today and it's deaded. Won't turn on. Swapped battery, same thing. GOnna take it back again. No problem with the Testo.

[Greend88]

Been using mine daily for bout a month no problems.

[ORV]

I bought one. Seems cool

[mark beiser]

Mine died after about a month, still need to trade it in for a new one.

It is completely useless for in duct readings in an attic environment because the prob doesn't insert far enough into the duct to get into the air stream.
In most cases, especially with lined metal ducts, it only gives you the conditions of the boundary layer of air near the walls of the duct.

It is handy for walk around readings, and for getting ambient conditions.

It also isn't really a pocket tool.
It is to long and heavy for a shirt pocket, and because of how it is constructed, it is far less rugged than you would expect something encased in an aluminum tube to be.

[GJ-HVAC/R]

I just bought the PRH2 today. Seems to be accurate. I agree with mark that its not really a pocket tool. But I like it so far.

[itsiceman]

Mine died after about a month, still need to trade it in for a new one.

It is completely useless for in duct readings in an attic environment because the prob doesn't insert far enough into the duct to get into the air stream.
In most cases, especially with lined metal ducts, it only gives you the conditions of the boundary layer of air near the walls of the duct.

It is handy for walk around readings, and for getting ambient conditions.

It also isn't really a pocket tool.
It is to long and heavy for a shirt pocket, and because of how it is constructed, it is far less rugged than you would expect something encased in an aluminum tube to be.

How about a longer cap that doubled as a scoop with intake and exhaust openings to pull air across the sensor from further inside the duct? Maybe you could cut a piece of tubing or cpvc as a attachment.

[Trehak01]

I bought one a few months ago and I use it everyday! well worth it.

[ferd1942]

Check the Digital Psychrometer Recommendation thread.

[mark beiser]

How about a longer cap that doubled as a scoop with intake and exhaust openings to pull air across the sensor from further inside the duct? Maybe you could cut a piece of tubing or cpvc as a attachment.

Or I could just use something with a longer probe, like the Testo 605-H2.

Just have to remember to keep the battery door taped on...

[RussellHarju]

Fieldpiece also has the SRH3 which is more full functioning Psychrometer that can also measure target superheat and target evap exit temp (target temp split). Check out the video