Description
The Testo 635-1 Temperature and Humidity Measuring Instrument is a versatile device that allows you to measure temperature, air humidity, and dew point in various applications, including compressed air. With advanced technology and a wide selection of optional probes, this instrument offers a range of measurement possibilities.
Key Features of the Testo 635-1 Temperature and Humidity Measuring Instrument:
- Multiple Measurement Options: The Testo 635-1 can measure temperature, air humidity, dew point, and ambient absolute pressure. It can also calculate the dew point distance and perform measurements of material moisture, surface temperature, core temperature, U-value (thermal assessment of structural components), and absolute pressure. With optional probes, you can expand the measuring capabilities of the instrument to suit your specific needs.
- Plug-in and Radio Probes: The instrument has two probe inputs for plug-in probes with cables. Additionally, it can receive readings from up to three temperature or humidity probes via wireless measurement data transfer. This allows you to gather data from multiple points simultaneously and display them clearly on the instrument.
- Robust and Practical Design: The Testo 635-1 is designed to withstand demanding environments. It features a solid housing that protects it from impacts, making it suitable for use in various settings. The instrument also displays minimum, maximum, and mean values, providing a comprehensive overview of the measured data.
- Dew Point and Dew Point Distance: When a pressure dew point probe is attached, the instrument can measure the pressure dew point in compressed air. By attaching a humidity probe, it can also measure the dew point and water content of indoor air, along with the psychrometric temperature. The instrument calculates the dew point distance between indoor air and the wall surface, which can provide initial indications of mold formation and help identify potential causes.
- Easy to Use: The Testo 635-1 features user-friendly menu guidance and an illuminated display for easy reading, even in low visibility conditions. It offers a simple and intuitive interface for quick and efficient operation.
- Documentation of Measurement Data: The instrument supports the optional Testo fast printer, allowing you to print out measurement data such as air humidity or temperature. It also offers a cyclical printing function, enabling the printout of individual readings or entire series of measurements at adjustable intervals.
The delivery scope includes the Testo 635-1 temperature and humidity measuring instrument, a calibration protocol, and batteries. Note that the instrument requires a probe for commissioning, which is available separately.
Applications for the Testo 635-1 Temperature and Humidity Measuring Instrument:
- Localizing Mould: The instrument is useful for measuring moisture in ceilings and walls, providing initial information about the causes of mold formation, such as condensation or moisture ingress due to structural damage or faulty insulation.
- Monitoring Production and Storage Conditions: The Testo 635-1 is widely used in production facilities, storage rooms, museums, archives, cold storage warehouses, containers, and sales counters. It helps ensure that specified temperature and humidity values are maintained during production and storage processes. The instrument offers spot measurement capabilities and can be paired with various probes for comprehensive analysis and documentation of measurement results.
The Testo 635-1 Temperature and Humidity Measuring Instrument is a reliable tool for monitoring and assessing temperature, humidity, and dew point in a range of applications. Its versatility, robustness, and user-friendly features make it suitable for professionals in various industries.




