Pyschrometer - Digital or Sling

Discussion in 'Tools and Test Equip' started by Dowadudda, May 14, 2011.

  1. Offline

    Dowadudda Head of Defrost Department

    Message Count:
    682
    Likes Received:
    23
    Location:
    somehow in Texas
    I am in need of a new meter. I was taught by the old salts that digitals were not as accurate as the slings. These same guys still use analog meters. Wiggies. LOL.

    I have to get a new one and was wanting to have opinions on sling versus digital.

    I owned and broke a digital last year. I have a digital now thats going crazy and need a new one.

    When I was heavy into EMS a few years back, you know any ems system basically uses the same crap that any hand held digital meter uses to arrive at the measurment value.

    Are we splitting atoms with a sling versus digital or is there something to this?

    What digitals do you guys reccomend?
  2. Offline

    Snoring Beagle Need Little - Want Less - Love More

    Message Count:
    8,357
    Likes Received:
    74
    Location:
    Up North Michigan
    Sling is the way to go for spot checks.

    I wave that around in offices. It's a great way to meet the girls. They all come up to me ask what is that and why are you doing it.

    On the other hand a data logger for RH and Temp is the bomb when used over time with the software to generate reports.
  3. Online

    somedude Senior Stalker & PITA, aka zachhvac

    Message Count:
    1,704
    Likes Received:
    41
    Location:
    Cincinnati
    Brother i blow through those things every year.
    I havent found one i truly liked yet, using an amp prober brand now, its ok.
    The old slings are ok, IF you calibrate them properly, but the bulbls get broken.

    Let me know if you find one you like, i would recommend testo, except their manifolds.
  4. Online

    crackertech Old fart

    Message Count:
    24,582
    Likes Received:
    242
    Location:
    Fl

    That's the one I use as well but I also have a sling the sling is dead on amp is always off + - 3-5 %
  5. Online

    Swampfox Troll Level: Dippy

    Message Count:
    26,512
    Likes Received:
    216
    Location:
    Hell Hole Swamp
    Hard to take readings inside the duct with a sling, that is a new capability available to us with the digitals, The Testo 605-H2 is nice for that

    If you just want to take readings in a space, a sling works fine for that, really all depends on what you want to do
  6. Offline

    Dowadudda Head of Defrost Department

    Message Count:
    682
    Likes Received:
    23
    Location:
    somehow in Texas
    usually measuring space temp around cases in supermarkets. I use to use a sling a long time ago and I am getting tired of buying a new digital every flipin year.

    Think I am going back to a sling. Bachrach. The old stand by.
  7. Online

    Catpower The Crowd Pleaser

    Message Count:
    7,201
    Likes Received:
    152
    Location:
    in the Cabana
    I've had both and really it didn't make alot of differance, but I kinda prefer a sling, the damn digital ones die too fast for me, had a fluke it died after about 3 yrs and 2 uses and they wanted about 160 to repair with replacement, screw that and had Testo good for a while but got out of cal and couldn't get it right, but a sling is always right just have to be a little more fragile with them

    Swampy, if you make a hole in the duct big enough for the sling, just stick it ( the thermometers) in the duct so the thermometers are facing the air flow, and let the fan do the slinging for you That's how we did it before the digital stuff came out


    But actually I have a calibrated finger that can tell RH, temp, and even amp draw:lachen::lachen::lachen::lachen::lachen::lachen::lachen:
  8. Online

    crackertech Old fart

    Message Count:
    24,582
    Likes Received:
    242
    Location:
    Fl
    :lachen::lachen::lachen:
  9. Offline

    jpsmith1cm Professional Un-thawer

    Message Count:
    763
    Likes Received:
    8
    Actually, it is very hard to get a good, accurate reading with a sling. For correct wet bulb measurement, you need a precise range of air velocity across the wick.

    Either drop the coin on a digital. I've got 2 and both are within a degree of each other OR, go big and get a Cole/Parmer scientific.

    http://cgi.ebay.com/COLE-PARMER-PSYCHROMETER-3312-20-HVAC-PSYCHRO-DYNE-/130499517107


    One of our customers is so concerned about humidity problems and the different readings that guys were getting with different meters, they actually bought a bunch of these and provided the contractors with them.
  10. Online

    Catpower The Crowd Pleaser

    Message Count:
    7,201
    Likes Received:
    152
    Location:
    in the Cabana
    Not really, take three reading and average, if that isn't close enough for your customer, you will never be able to satisfy them anyway


    Been there done that
  11. Offline

    jrbenny Old Member

    Message Count:
    22,650
    Likes Received:
    131
    Location:
    LU-uh-vel
    Ditto.
  12. Offline

    jpsmith1cm Professional Un-thawer

    Message Count:
    763
    Likes Received:
    8
    You must know our customers......
  13. Offline

    otto Bakery Chef

    Message Count:
    12,000
    Likes Received:
    76
    Location:
    in a van down by the river
    I have both.
    [IMG]
  14. Online

    crackertech Old fart

    Message Count:
    24,582
    Likes Received:
    242
    Location:
    Fl
    But do you know how to use them? Or do you ya have to call Bob.:D:lachen::lachen::lachen:
  15. Offline

    otto Bakery Chef

    Message Count:
    12,000
    Likes Received:
    76
    Location:
    in a van down by the river
    I use them maybe once a year.
    I call Bob for everything, he's my tech support.
  16. Online

    crackertech Old fart

    Message Count:
    24,582
    Likes Received:
    242
    Location:
    Fl
    Bob is a smart somebitch for sure and so are you.:cheers:
  17. Offline

    otto Bakery Chef

    Message Count:
    12,000
    Likes Received:
    76
    Location:
    in a van down by the river
    To be placed in the same category as bOb is an honor.
  18. Offline

    heavymetaldad Perfessional Member *

    Message Count:
    48,362
    Likes Received:
    159
    Location:
    in a sub-basement
    who is bob and wtf is a psycholmeter?
  19. Offline

    snipe63 New Member

    Message Count:
    62
    Likes Received:
    0
    Location:
    SC
    I have an Amprobe, that was $120+, then I picked up the Cooper-Atkins temp/ rh meter, $254.
  20. Offline

    supertek65 Super member

    Message Count:
    507
    Likes Received:
    2
    i do not know wtf a psycho whatever is?
    but YOU are Bob!!!!!!!!!!!

Share This Page