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  1. #1
    Join Date
    Feb 2012
    Location
    Nebraska
    Posts
    197

    Digital Pocket Psychrometer - PRH2

    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.

  2. #2
    Join Date
    Apr 2012
    Location
    Greenwood Indiana
    Posts
    16
    I think im gonna try one.

  3. #3
    Join Date
    Jul 2009
    Location
    Kansas
    Posts
    393
    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.

  4. #4
    Join Date
    Oct 2007
    Location
    Richmond, VA
    Posts
    362
    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.

  5. #5
    Join Date
    Jul 2009
    Location
    Kansas
    Posts
    393
    Been using mine daily for bout a month no problems.

  6. #6
    Join Date
    Feb 2012
    Location
    Nebraska
    Posts
    197
    I bought one. Seems cool

  7. #7
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    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.
    If more government is the answer, then it's a really stupid question.

  8. #8
    Join Date
    May 2012
    Location
    Grand Junction, CO
    Posts
    244
    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.

  9. #9
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    7,215
    Quote Originally Posted by mark beiser View Post
    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.
    “If You Can Dodge A Wrench You Can Dodge A Ball”

  10. #10
    Join Date
    Oct 2011
    Location
    between here and over there
    Posts
    453
    I bought one a few months ago and I use it everyday! well worth it.

  11. #11
    Join Date
    Apr 2012
    Location
    Millsboro, DE
    Posts
    100
    Check the Digital Psychrometer Recommendation thread.

  12. #12
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Quote Originally Posted by itsiceman View Post
    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...
    If more government is the answer, then it's a really stupid question.

  13. #13
    Join Date
    Oct 2008
    Location
    Fullerton
    Posts
    786
    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

    http://youtu.be/FzbYsZPkBA8

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