Humidity/temperature measuring instrument - testo 635

Product catalog summary

Overview: The document provides a comprehensive overview of the testo 635 humidity and temperature measuring instrument, detailing its technical specifications and functionalities. It distinguishes between the testo 635-1 and testo 635-2 models, highlighting their capabilities in measuring various environmental parameters.

Main Features:

The device supports the connection of 2 plug-in probes and 3 wireless probes for measuring temperature, air humidity, material equilibrium moisture, pressure dewpoint, absolute pressure, and U-value.
Display features include dewpoint distance, minimum, maximum, and mean values, with an illuminated display for enhanced visibility.
It has a protection class of IP 54, ensuring durability against dust and water splashes.
The testo 635-2 model includes an instrument store for 10,000 measurement values and PC software for data archiving and documentation.

Technical Specifications:

Operating temperature ranges from -20 to +50 °C, with storage temperature from -30 to +70 °C.
Battery life is approximately 200 hours using AA alkaline manganese batteries.
Dimensions are 220 x 74 x 46 mm, and the device weighs 428 g.
Sensor types include Type K (NiCr-Ni), NTC (humidity probe), and Testo humidity sensor, with various measurement ranges and accuracies.

Advantages of Models:

testo 635-1: Offers cyclic printing of readings on a Testo printer.
testo 635-2: Provides extended functions such as data storage, PC software, direct display of material moisture, and U-value probe connection.

Accessories and Calibration:

Various accessories are available, including printers, chargers, and calibration certificates for humidity, temperature, dewpoint, and absolute pressure.
Calibration certificates are available for different measurement points and conditions, ensuring accuracy and reliability.

Probes and Measurement Capabilities:

Different types of probes are available for humidity, pressure dewpoint, absolute pressure, air, surface, immersion, and penetration measurements.
Probes are designed for specific applications, such as measuring in compressed air systems, high humidity environments, and on various surfaces.

Conclusion: The testo 635 is a versatile and robust instrument suitable for a wide range of environmental measurements. Its ability to connect multiple probes, both wired and wireless, along with its data storage and software capabilities, make it a valuable tool for professionals in various fields.

Additional Technical Specifications:

Probe Head: Class 2 T/C probe head with a resolution of 0.1 °C for temperatures between -50 to +199.9 °C and 1.0 °C for the remaining range.
Response Time (t99): 12 seconds in water for one probe and 10 seconds for another.
Dimensions: Various dimensions provided for different probe heads, including lengths of 105 mm and 100 mm, and diameters of Ø 5 mm and Ø 3.4 mm.

Radio Probes:

Approved for use in multiple countries with radio frequencies of 869.85 MHz FSK and 915.00 MHz FSK.
Includes radio immersion/penetration probes and radio handles for plug-in probe heads.

Common Technical Data:

Measuring Rate: Adjustable at 0.5 seconds or 10 seconds on the handle.
Radio Coverage: Up to 20 meters without obstructions.
Operating Temperature: -20 to +50 °C.
Storage Temperature: -40 to +70 °C.
Protection Class: IP54.

Battery Information:

Radio Immersion/Penetration Probe: Uses 2 x 3V button cells (CR 2032) with a battery life of 150 hours at a 0.5-second measuring rate and 2 months at a 10-second rate.
Radio Handle: Uses 2 AAA micro batteries with a battery life of 215 hours at a 0.5-second measuring rate and 6 months at a 10-second rate.

Catalog excerpts

Humidity/temperature measuring instrument - testo 635-1

measuring instrument Connection of 2 plug-in probes and 3 wireless probes Measurement of temperature, air humidity, material equilibrium moisture, pressure dewpoint, absolute pressure Display of dewpoint distance, min., max. and mean values luminated display Instrument store for 10,000 measurement values PC software for archiving and documenting measurement The testo 635 offers the possibility of testing and analyzing air humidity, material moisture (based on equilbrium moisture), U-value and the dewpoint in compressed air In addition to measurement with classical probes, a wireless measurement over up to 20 m distance is also possible with the testo 635. This eliminates damage to the cable or difficulties in handling.The wireless probes are available for the measurement parameters temperature and humidity, up to three wireless probes can be recorded and displayed by the testo 635. The optional plug-in radio module can be The testo 635 stands out thanks to its intuitive operation and clear menu structure. For example, for measurements at different measurement sites, the testo 635-2 provides the advantage that the measurement values can be allocated to the respective measurement site. For long-term measurements and material moisture measurements, the instrument can be switched between different user profiles. The testo 635 is available in two versions. The version testo 635-2 has extended instument functions such as an instrument store, PC software, direct display of material humidity and the possibility of connecting a U-value probe

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Humidity/temperature measuring instrument - testo 635-2

Technical data testo 635-1 thermohygrometer ind. battery and calibration protocol Common advantages • Connection of 3 radio probes • Measurement of air humidity, material equilibrium moisture and pressure dew point in compressed air • Display of dew point difference, min, max and mean • Print data on Testo printer (optional) • Backlit display testo 635-2 humidity/temperature measuring Instrument with measurement value store, PC software and USB-cable Incl. battery and calibration protocol Cyclic printing of readings on testo printer, e.g. once per General technical data Instrument store for 10,000...

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Humidity/temperature measuring instrument - testo 635-3

Transport and Protection Part no. Additional accessories and spare parts Calibration Certificates

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Humidity/temperature measuring instrument - testo 635-4

Probe type Probe shaft/probe shaft tip Humidity probes Pressure dewpoint probes Absolute pressure probes Absolute pressure probe 2000 hPa Robust air probe, T/C Type K, Fixed cable 1) According to standard EN 60584-2, the accuracy of Class 1 refers to -40 to +1000 °C (Type K), Class 2 to -40 to +1200 °C (Type K), Class 3 to -200 to +40 °C (Type K).

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Humidity/temperature measuring instrument - testo 635-5

Probe type Probe shaft/probe shaft tip Surface probes 1) According to standard EN 60584-2, the accuracy of Class 1 refers to -40 to +1000 °C (Type K), Class 2 to -40 to +1200 °C (Type K), Class 3 to -200 to +40 °C (Type K).

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Humidity/temperature measuring instrument - testo 635-6

Probe type Probe shaft/probe shaft tip Surface probes Immers./penetr. probes 1) According to standard EN 60584-2, the accuracy of Class 1 refers to -40 to +1000 °C (Type K), Class 2 to -40 to +1200 °C (Type K), Class 3 to -200 to +40 °C (Type K).

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Humidity/temperature measuring instrument - testo 635-7

Radio probes Radio probes for immersion/penetration measurements Part no. Radio handles with probe head for air-/ immersion-penetration-meas. Part no. Radio handles with probe head for surface measurement Part no. Radio probes incl. humidity probe head Part no. Radio handles for attachable T/C probes Part no.

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