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TH-Calc 7425 Thermohygrometers

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).
TH-Calc 7425 Thermohygrometers
TSI TH-Calc 7425 Thermohygrometers

Features and Benefits
•Reliably measures temperature and humidity
•Calculates wet bulb temperature
•Easy to read display shows parameters simultaneously
•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

Included Items
•Meter
•Hard carrying case
•Downloading software with cable
•NIST-traceable calibration certificate
•Operation and service manual

Specifications
Specifications are subject to change without notice.
Temperature
Range: 32 to 140°F (0 to 60°C )
Accuracy1: ±1.0°F (0.6°C)
Resolution: 0.1°F (0.1°C)
Response time: 30 seconds (90% of final value, air velocity at
2 m/s)
Display units: °C or °F (user selectable)
Type: Thermistor

Humidity
Range: 5 to 95% RH
Accuracy2: ±3% RH (includes ±1% hysteresis.)
Resolution: 0.1% RH
Response time: 20 seconds (for 63% of final value)
Sensor type: Thin-film capacitive

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)

Instrument Operating Conditions:
Altitude up to 4000 meters
Relative humidity up to 80% RH, non-condensing
Pollution degree 1 in accordance with IEC 664
Transient over voltage category II

Data Storage Capabilities:
Range: 12,700+ samples and 100 test IDs (one sample
can contain fourteen measurement types)

Logging Interval:
Intervals: 1 second to 1 hour

Time Constant:
Intervals: User selectable

External Meter Dimensions:
3.3 in. x7.0 in. x1.8 in. (8.4 cm x17.8 cm x4.4 cm)

Meter Probe Dimensions:
Probe Length: 7.0 in. (17.8 cm)
Probe Diameter of Tip: 0.75 in. (19.0 mm)

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