1-866-4 JJSTECH(1-866-455-7832)

Fieldpiece Psychrometer Accessory Head - ARH5

Item #:
Fieldpiece Psychrometer Accessory Head - ARH5


Send This Page to a Friend

Ask an Expert

Our tech experts are ready to help!

1-866-4 JJSTECH (1-866-455-7832)

Email Us
Share this product:
Fieldpiece Psychrometer Accessory Head - ARH5

Fieldpiece Psychrometer Accessory Head - ARH5



ARH5 Psychrometer Accessory Head by Fieldpiece

To assist HVACR professionals in getting the proper measurements, Fieldpiece engineered this in-duct psychrometer head to take measurements in the duct where they are supposed to be taken -- near the evaporator! So HVACR professionals can trust the results for tests like temperature splits, target evaporator exit temperature, target superheat, and CheckMe!® because measurements are taken without the interference of outside air temp or leaks in the duct work.

Plus, the ARH5 can make hustling from condenser, to attic, and back again to take indoor wet bulb and charge a system, a thing of the past! When attached to a wireless transmitter, ARH5 measurements can be sent wirelessly to any Fieldpiece wireless meter (HG3, LT17AW, EH4W), and SMAN4 Wireless Digital Manifold from anywhere on the job site. So results like indoor wet bulb, can be read in real-time on your wireless meter from up to 100' away.

Like all Fieldpiece products, the ARH5 accessory head was engineered specifically to put the right tools in the hands of HVACR professionals. For even more convenience and time savings, Fieldpiece designed the 38" telescoping probe with laser etching so techs know the sensor is in the correct location, and is facing in the proper direction. With the quick-response sensor it's a snap to complete target superheat, and take target evaporator exit temperature tests.

Designed specifically for HVACR professionals, the ARH5 InDuct Psychrometer is a great tool to properly charge fixed restrictor systems. More than 70% of A/C units are improperly charged, and therefore running inefficiently, but with the ARH5 it's easier to ensure units are running at their maximum efficiency.

  • Measures temperature and %RH
  • Calculates wet bulb and dew point
  • Slim 38" telescoping probe
  • Fast response time
  • Depth and direction indicators
  • Hands-free testing with stabilizing cone and magnetic hanger
  • Can send wireless measurements from up to 100' away
  • Target superheat and target evaporator exit temp with HG System Analyzers


  • In-Duct Psychrometer Accessory Head - ARH5
  • Telescoping Precision Thermistor Probe
  • Stabilizing Cone - RCONE
General Specifications
Telescoping Probe Length Up to 38 inches (97cm)
Probe Tip Diameter 0.35 inch (9mm)
Storage temperature -4°F to 140°F (-20°C to 60°C), 0 to 80% RH (with battery removed)
Temperature Coefficient 0.1 x (specified accuracy)/°C (<18°C or >28°C)
Power Single standard 9-volt battery, NEDA 1604, JIS 006P, IEC 6F22
Auto Power Off Approx. 15 minutes
Battery life 150 hours typical (alkaline)
Low Battery Indication Red LO BATT LED will light to indicate low battery
Output Impedance 500Ω approx
Dimensions 144mm(H) x 67mm(W) x 32mm(D)
Weight Approx. 240g, including battery
Sensor type Precision thermistor
Operating environment -4°F to 140°F (-20°C to 60°C)
Range -4°F to 140°F (-20°C to 60°C)
Resolution 0.1°F / 0.1°C
Accuracy ±(1°F) 32°F to 113°F
±(2°F) -4°F to 32°F, 113°F to 140°F
±(0.5°C) 0°C to 45°C
±(1°C) -20°C to 0°C, 45°C to 60°C
Output 1mV to 1°F/°C
Relative Humidity
Sensor Type Capacitance polymer film
Operating environment 32°F to 131°F (0°C to 55°C)
Range 0% to 100%RH
Accuracy ±(2.5%) 10% to 90%RH
±(5%) <10%RH and >90%RH

Questions & Answers

There are no questions or answers for this item.