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Fieldpiece

Fieldpiece PRH2 Digital Psychomotor

  • Based on 687 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Mar 28
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Features

  • Use for walk around testing or in-duct analysis
  • Clip it to your pocket just like a pen
  • Narrow tip for insertion into ductwork
  • Twist cap protects sensors when not in use
  • Bright backlight

Description

Use the pocket sized PRH2 for incredibly fast and accurate everyday psychometrics. Get your percent relative humidity, wet bulb, dew point, and dry bulb temperatures quickly and easily. made in United States. Manufactured by Fieldpiece instruments Inc.

Brand: Fieldpiece


Power Source: Battery Powered


Style: Digital


Item Weight: 3.2 Ounces


Item dimensions L x W x H: 0.09 x 3 x 2 inches


Brand: ‎Fieldpiece


Power Source: ‎Battery Powered


Style: ‎Digital


Item Weight: ‎3.2 Ounces


Item dimensions L x W x H: ‎0.09 x 3 x 2 inches


Specification Met: ‎Some


Upper Temperature Rating: ‎120 Degrees Celsius


Measurement Type: ‎Psychrometer


UPC: ‎872641002664 696335209166


Manufacturer: ‎Fieldpiece Instruments Inc


Product Dimensions: ‎0.09 x 3 x 2 inches


Item Weight: ‎3.2 ounces


Item model number: ‎PRH2


Batteries: ‎1 AA batteries required.


Is Discontinued By Manufacturer: ‎No


Date First Available: ‎May 31, 2012


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Mar 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Afterpay Financing
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Top Amazon Reviews

    • Great tool
Very accurate and works great while being able to put in your pocket
Reviewed in the United States on October 17, 2023 by craig coffey
    • Small and functional
Working great 👍. Looks sensitive so keep it safe, otherwise works great.
Reviewed in the United States on January 17, 2026 by Kalen
    • Nice tool but beware of the plastic threads on cap
The PRH2 is a handy tool and I've used it numerous times already in the short time I've had it to determine Wet bulb for calculation of target superheat. The size is just right and I keep it in my Veto TP4 when not in use. I wanted to give it 5 stars but the plastic threading of the cap and the unit don't seam to match very well. In fact if your not careful you can easily, very easily cross thread it. So be careful. I can get the cap to screw on but it's less than a full turn, which doesn't seem natural. If this cap wasn't able to be secured then it would be on its way back. So to summarize I really like this tool, it works well and it will remain in my bag. ... show more
Reviewed in the United States on April 16, 2017 by Wingnut
    • A Must!!!
The psychometer is must for any HVAC technician. Very content with my purchase.
Reviewed in the United States on February 18, 2026 by Aston Johnson
    • Easy to use
Easy to use, and easier to read. Seems a quality product. The only complaint that I can think to have is the size. It is 3-4x the size around of a pen you would put in your pocket, and a little bit taller. I didn't take off a star because I had room for it in my tool bag, and it's small enough that room can easily be made in yours too. I'm happy with my purchase. ... show more
Reviewed in the United States on December 18, 2017 by Bendigo
    • Temps
Excellent for taking wet / dry bulb temperatures
Reviewed in the United States on May 28, 2025 by Chris Swan
    • Good HVAC tool but fragile
I use this regularly in my work as an HVAC service tech. It calculates indoor wet bulb and outdoor dry bulb accurately to calculate superheat for checking or charging an AC system. It is a good working tool but it has its flaws: - it doesn't clip into a shirt pocket - it is too long. - it is somewhat fragile. Do not twist the top on too hard or the insides will rotate in the case and damage it. Don't drop it. I've broken 2 in 5 years but I'm hard on tools. - it can be slow to register temperatures. ... show more
Reviewed in the United States on August 11, 2018 by Dave Andrews
    • Easy to use, nice size, not fragile.
Works great, needs several seconds to stabilize humidity and temp readings. The cap has not been as issue, it is plastic threads. If you don't cross thread the lug-nuts on a car, you won't have a problem with this unit. If you treat it like any other measuring instrument you have (don't drop it or treat it like a hand tool) it will last you quite a while. It has been used on several locations and been bouncing around the console of my truck with no issue to report. ... show more
Reviewed in the United States on November 23, 2020 by H Lee

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