Fieldpiece SRH3
In-Duct Digital Psychrometer with 38" Telescoping probe

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Fieldpiece SRH3 Shown
Product Information
Datasheet 3.2 MB PDF Datasheet
Manual 3.1 MB PDF Datasheet
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  • 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
  • Calculates target superheat and target evaporator exit temperature

The Fieldpiece SRH3 In-Duct Psychrometer with 38" Telescoping probe is a great tool to properly charge fixed restrictor systems by quickly determining the target superheat, and to help determine optimum airflow across the evaporator with a target evaporator exit temperature test. To assist HVACR professionals get the proper measurements, Fieldpiece engineered this in-duct psychrometer to take measurements in the duct where they are supposed to be taken - near the evaporator!

The Fieldpiece SRH-3's 38" telescoping probe's laser etched ruling and flattened edges allows techs to locate proper measurement points within a duct, and ensures that the probe is properly aligned. With the quick sensor it's a snap to determine target superheat, and take target evaporator exit temperature tests.

Temperature Sensor type: Precision thermistor
-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
Sensor Type: Capacitance polymer film
32°F to 131°F (0°C to 55°C)
Range: 0% to 100%RH
Accuracy: ±(2.5%) 10% to 90%RH
±(5%) 90%RH
Note: Above accuracies stated at 73.4°F (23°C)
Sensor Response
60 seconds typical for 90% of total range.
Sensor Hystersis: ±1%RH typical (Excursion of 10% to 90% to 10%RH)
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 (28°C)
Over range: "OL" or "-OL" is displayed
Power: Single standard 9-volt battery, NEDA 1604, JIS 006P, IEC 6F22
Battery life: Approx. 150 hours (alkaline)
Low battery indication: is displayed when the battery voltage drops below the operating level
Auto Shut off: 15 minutes of inactivity (switchable)
Dimensions: 7.9 in (H) x 2.6 in (W) x 1.4 in (D), [200mm (H) x 66mm (W) x 36mm (D)]
Weight: Approx. 400g, including battery
Ordering Information
Model Description Buy Online Price
SRH3  Fieldpiece SRH3 In-Duct Digital Psychrometer with 38" Telescoping probe Buy Now Sale $148.00
(Reg. $185.00)
Included Accessories
  • 1 - Stabilizing cone
  • 1 - Blow-molded case with padding