TH-Calc Thermohygrometers
Models 7415 and 7425

The Model 7415 Thermohygrometer is a basic instrument that accurately and reliably measures temperature and humidity. It is ideal for use in thermal comfort studies and HVAC system performance testing. The Model 7425 Thermohygrometer is a diagnostic instrument with advanced capabilities, such as data logging, review of statistics and downloading to a PC using LogDat2 software (included).

Features:
  • Reliably measures temperature and humidity
  • Calculates wet bulb temperature
  • Easy to read display shows parameters simultaneously
  • Added Features of model 7425:
  • Directly calculates dew point
  • No psychometric chart needed
  • Calculates % outside air
  • Logs data with time and date stamp
  • Stores 12,700+ samples and 100 test IDs
  • LogDat2™ downloading software included
Applications:
  • Conducting thermal comfort studies
  • Conducting IAQ evaluations
  • Verify building HVAC system performance
  • Troubleshooting heating and cooling systems
  • Monitoring air conditions for manufacturing processes

Temperature
  • Range: 32 to 140°F (0 to 60°C)
  • Accuracy: ±1.0°F (±0.6°C)
  • Resolution: 0.1°F (0.1°C)
Humidity
  • Range: 5 to 95% RH
  • Accuracy: ±3% RH
  • Resolution: 0.1% RH
Instrument Temperature Range
  • Operating (Electronics):40 to 113°F (5 to 45°C)
  • Operating (Probe): 14 to 140°F (-10 to 60°C)
  • Storage: -4 to 140°F (-20 to 60°C)
 Data Storage Capabilities (7425 Only)
  • Range: 12,700+ samples and 100 test IDs

Logging Interval (7425 Only)

  • 1 second to 1 hour
Time Constant (7425 Only)
  • User Selectable
Dimensions
  • External Meter: 3.3 in. x 7.0 in. x 1.8 in. (8.4 cm x 17.8 cm x 4.4 cm)
  • Probe dimensions: 7.0 in. (17.8 cm) (length), 0.75 in. (19.0 mm) (diameter of tip)
  • Weight: 0.6 lbs. (0.27 Kg)
  • Power Requirements: Model 7415 = Four AA Batteries
    Model 7425 = Batteries or optional AC adapter

 



Ordering Information Price $US 
Order Online 
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Model 7415 TMIAQ1, Includes instrument, hard carrying case, batteries, operation and service manual, and calibration certificate. $580.00  
Model 7425 wtih data logging software and USB cable $850.00  

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