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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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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PRH2 Digital Pocket Psychrometer for HVAC

Product ID: 2171008

Details

Brand
Fieldpiece
Item Weight
3.2 ounces
Item dimensions L x W x H
0.09 x 3 x 2
Power Source
Battery
Style
Digital

📏2-inch slim probe for ducts

⏱️instant real-time readings

🌡️4 key psychrometric metrics

4881754₫

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌬️ Master the air, master the job—Fieldpiece PRH2 keeps you ahead of the curve.

POCKET SIZED POWERHOUSE - Compact, clip-on design means your essential tool is always within reach—walk the site without missing a beat.
DESIGNED FOR TIGHT SPACES - Slim 2-inch probe slips effortlessly into ductwork, capturing critical air conditions where it counts most.
SPEED THAT KEEPS YOU AHEAD - Real-time data delivery accelerates troubleshooting and routine checks—because time is money on the jobsite.
VISIBILITY IN ANY ENVIRONMENT - Bright backlit dual display with Hold, Min, and Max functions ensures you never miss a crucial reading, even in the darkest corners.
PRECISION IN EVERY MEASUREMENT - Wet bulb, dry bulb, dew point & relative humidity—all at your fingertips for flawless HVAC diagnostics.

The Fieldpiece PRH2 Digital Pocket Psychrometer is a compact, battery-powered HVAC tool delivering four essential psychrometric measurements—wet bulb, dry bulb, dew point, and relative humidity. Its slim 2-inch probe enables easy in-duct testing, while a bright backlit dual display with Hold, Min, and Max functions ensures clear readings in any environment. Designed for fast, walk-around diagnostics, it’s the go-to device for HVAC professionals seeking precision and efficiency on every job.

Specifications

ASIN	B0087SD43W
Best Sellers Rank	#60,939 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #77 in Multi Testers
Brand	Fieldpiece
Brand Name	Fieldpiece
Color	Gray
Customer Reviews	4.6 out of 5 stars 715 Reviews
Included Components	Meter
Item Dimensions	0.09 x 3 x 2 inches
Item Highlight	Measure Wet Bulb, Dry Bulb, Dew Point andRelative Humidity - Fast HVACR Walk-Around and In-Duct Testing
Item Weight	3.2 ounces
Item dimensions L x W x H	0.09 x 3 x 2 inches
Manufacturer	Fieldpiece
Measurement Type	Psychrometer
Model	PRH2
Number of Items	1
Number of Packs	1
Part Number	PRH2
Power Source	Battery Powered
Specification Met	Some
Style	Digital
Style Name	Digital
UPC	872641002664 696335209166
Unit Count	1 Count
Upper Temperature Rating	120 °C

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4881754₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vietnam.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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