When you go in to the customers house turn on The A/C take WB (wet bulb) reading at the return air grill then go outside and take a dry bulb measurement at condensing unit or heat pump use your measurements with your refrigerant gauges. And calculate your subcooling or superheat depending on weather you have a TXV or not, I just enter the values in to my SMAN4 gauges and it calculates it for me the I either add or remove (reclaim) refrigerant to reach my subcooling or superheat or you can type in Fieldpiece PRH2 in to You Tube and watch a video on how to use it

Tip diameter and lenght? For measuring WB temp of air entering and leaving evaporator?

The PRH2 is an economical, stand-alone psychrometer that measures wet bulb, %RH, dew point and dry bulb temperatures, all in the convenience of a pocket tool. Portable enough to clip into a pocket, the PRH2 is great for walk-around testing, and the pen-like psychrometer features a slim, 2” long tip to take measurements easily inside ductwork. The PRH2 has a bright backlight so it’s easy to read in dark areas and runs on a single AA-battery that lasts up to 100 hours.

In what way is this device a psychomotor?

It's not a psychomotor, it's a psychrometer.

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描述

🔍 Discover Precision in Your Pocket!

SENSOR PROTECTION - Twist cap safeguards sensors when not in use.
VERSATILE TESTING - Ideal for both walk-around testing and in-duct analysis.
PRECISION INSERTION - Narrow tip designed for easy access into ductwork.
ILLUMINATED READINGS - Bright backlight ensures visibility in low-light conditions.
POCKET SIZED CONVENIENCE - Clip it to your pocket like a pen for on-the-go testing.

The Fieldpiece PRH2 Digital Psychomotor is a versatile, pocket-sized tool designed for HVAC professionals, featuring a narrow tip for easy duct access, a protective twist cap for sensors, and a bright backlight for clear readings in any environment.

H**E

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.

23.11.2020

D**B

Exceptional product

Arrived much sooner than promised. As an HVAC technician, this is a valuable tool!

27.01.2024

V**N

Accurate, feels cheaply made. Plastic not metal

Great tool, only reason for 4star is that I wish it was about one more inch longer for lined duct, and it should be made with metal, not plastic. Threads on protective cap are easily stripped. Measurements are accurate and as long as you have it in its own spot in your tool bag it should be ok.

15.06.2021

C**N

Temps

Excellent for taking wet / dry bulb temperatures

28.05.2025

C**Y

Great tool

Very accurate and works great while being able to put in your pocket

17.10.2023

G**O

Great

Very handy tool can fit on my pocket

9.08.2023

D**S

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.

11.08.2018

B**T

FAST IN GIVING RESULTS

ITS THAT GOOD THAT I'LL BUY ANOTHER ONE

30.06.2024