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Data Sheet | Instruction Manual
Testo 635-2 Professional Multichannel Temperature and Moisture Meter
The premium Testo 635-2 temperature and moisture meter is an advanced, industrial-grade multi-channel diagnostic instrument engineered for structural evaluation, environmental logging, and complete air conditioning validation. This sophisticated system allows the concurrent monitoring of up to 5 individual channels via 2 plug-in technical sensor ports and 3 wireless radio probes. It tracks critical thermodynamic variables including relative humidity, material equilibrium moisture, absolute pressure, and pressure dew point in compressed air systems. Equipped with an expansive internal volatile buffer memory recording up to 10,000 measurements, the package includes dedicated PC software and a standard USB cable for seamless parameter archiving, diagnostic charting, and official building asset profiling.
Industrial & Building Diagnostics Applications
- Structural Moisture and Mold Evaluation: Automated calculation of the exact dew point difference between ambient indoor air and the wall surface to pinpoint structural moisture vulnerabilities.
- Compressed Air Systems Optimization: High-precision monitoring of pressure dew points using specialized capacitive humidity sensors to prevent line erosion.
- HVAC Performance Inspections: Comprehensive tracking of air equilibrium thresholds, core processes, and thermal insulation efficiency (including U-value tracking routines).
Technical Characteristics
| Sensor Inpurt Channels | 5 channels: 2 physical plug-in ports plus 3 optional wireless radio channels (up to 20 m range) |
| Capacitive Humidity Matrix | 0 to +100 %RH measurement span; 0.1 %RH high-resolution scaling |
| NTC Thermistor Temperature Scale | -40 to +150 °C operational reach |
| Thermocouple Type K Scale | Broad industrial deployment stretching from -200 °C up to +1370 °C |
| Absolute Pressure Module | 0 to 2000 hPa operational spectrum; 0.1 hPa resolution steps |
| NTC Core Instrument Accuracy | ±0.2 °C (-25 to +74.9 °C); ±0.4 °C remaining ranges; ±1 digit |
| Thermocouple Type K Accuracy | ±0.3 °C (-60 to +60 °C); ±(0.2 °C + 0.5% of measured value) remaining range |
| Data Logging Memory | Super-size internal data memory chip storing up to 10,000 engineering readings |
| Hardware Ingress Protection | Heavy-duty rugged ABS / TPE / Metal configuration shell with IP65 safety rating |
| Power Structure & Lifecycle | Standard alkaline manganese AA mignon batteries delivering a 200-hour fieldwork runtime |
Package Contents
- Testo 635-2 multi-channel digital temperature and moisture logger module
- Analytical PC software configuration platform for advanced data logging
- Standard USB interface data transmission connection cable
- AA batteries and official factory calibration protocol validation documentation