The SRH3 In-Duct Psychrometer 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. Because of its 38" telescoping probe, measurements are easier to take in the prime location; in the duct, near the evaporator. So HVACR pros know the results aren't affected by duct leaks or outside air temperature.
The 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.
Designed specifically for HVACR professionals, the SRH3 InDuct Diagnostic Psychrometer is a great tool to properly charge fixed restrictor systems. More than 70% of A/C units are improperly charged, and therefore running inefficienty, but with the SRH3 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
Calculates target superheat and target evaporator exit temperature
Included: InDuct digital psychrometer - SRH3, Stabilizing cone, Blow-molded case with padding
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
Auto Power off: after 15 minutes of inactivity if APO is active.
Battery life: 150 hours typical (alkaline)
Low Battery Indication: is displayed when the battery voltage drops below the operating level.
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
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
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
Note: Above accuracies stated at 73.4°F (23°C).
Sensor Response Time: 60 seconds typical for 90% of total range.
Sensor Hystersis: ±1%RH typical (Excursion of 10% to 90% to 10%RH)