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    testo 635-1 - Humidity measuring instrument

    0560 6351
    testo 635-1
  1. Measures air humidity, temperature, absolute pressure and dew point in compressed air
  2. Optional attachable probes
  3. Display of min., max. and mean values
  4. Cyclical printing of readings at freely adjustable intervals
    5. The testo 635-1 for temperature and humidity measurement with its State-of-the-art technology and large selection of probes allows you to measure temperature, air humidity and dew point – in compressed air as well.

    The testo 635-1 for temperature and humidity measurement is ideally equipped for checking the air humidity, temperature and dew point in living areas, in production, storage and server areas and in museums and cold stores. It also aids the measurements of the ambient absolute pressure and dew point in compressed air can be quickly and efficiently.


    Attachable optional probes are available for recording the following values:
    • Air humidity
    • Material moisture
    • Pressure dew point in compressed air
    • Air temperature
    • Surface temperature
    • Core temperature
    • U-value
    • Absolute pressure


    The testo 635-1 for temperature and humidity measurement has two probe inputs for plug-in probes with cables. In addition, upto three further temperature or humidity probes can be displayed with the testo 635-1 via radio-controlled data transmission i.e. wireless.

    Robust, practical and easy to handle
    In addition to readings, the testo 635-1 temperature and humidity measurement instrument also displays min., max. and mean values.
    While the pressure dew point probe measures the pressure dew point in compressed air, the humidity probe helps in measuring the dew point and water content of indoor air along with the psychrometric temperature, in addition to air humidity and air temperature.
    The measuring instrument also calculates the dew point distance between indoor air and wall surface. The “Applications” tab in testo 635-1, indicates whether a mould in the home has been caused by incorrect use of ventilation or by moisture ingress.
    The user-friendly menu guidance, illumination function for reading legibility even in poor visibility and impact resistance due to its solid housing makes testo 635-1 very reliable and easy to use.


    Documentation of measurement data with testo 635-1 temperature and humidity measuring instrument
    The optional testo fast printer enables you to print out measurement data such as air humidity or temperature easily at any time.
    The practical cyclical printing function on the testo 635-1 not only enables the printout of individual readings, but also of whole series of measurements on the testo fast printer at freely adjustable intervals (for example once a minute).

    testo 635-1 temperature and humidity measuring instrument, including calibration protocol and batteries.

    CAUTION: The instrument can only be commissioned with a probe. These are available separately.

    Temperature - NTC

    Measuring range
    -40 to +150 °C
    Accuracy
    ±0.4 °C (-40 to -25.1 °C)
    ±0.4 °C (+75 to +99.9 °C)
    ±0.5 % of mv (Remaining Range)
    ±0.2 °C (-25 to +74.9 °C)
    Resolution
    0.1 °C

    Temperature - TC Type K (NiCr-Ni)

    Measuring range
    -200 to +1370 °C
    Accuracy
    ±0.3 °C (-60 to +60 °C)
    ±(0.2 °C + 0.5 % of mv) (Remaining Range)
    Resolution
    0.1 °C

    Humidity - Capacitive

    Measuring range
    0 to +100 %RH
    Accuracy
    See probe data
    Resolution
    0.1 %RH

    Air probes

  5. Air probes
    Robuster Luftfühler, TE Typ K
    Robust air temperature probe (TC type K) – measuring range: -60 to +400 °C
      :
      0602 1793
      Rs 9,345.00

      • Humidity probes

    • Humidity probes
      Dünner Feuchtefühler mit abgesetzter Elektronik
      Thin humidity probe (Ø 4 mm) for measuring material moisture via the equilibrium moisture content – can be used in small bore holes and recesses
        :
        0636 2135
        Rs 61,490.00
      • Humidity probes
        Robust humidity probe for measuring the material equilibrium moisture content and humidity measurements at high temperatures
          :
          0636 2161
          Rs 77,835.00
        • Humidity probes
          Streufeldsonde
          Scatter field probe for fast and damage-free material moisture measurement, with probe cable 1.2 m
            :
            0636 6160
            Rs 48,000.00

            • Pressure dewpoint probes

          • Pressure dewpoint probes
            Drucktaupunktfühler zur Messung in Druckluftsystemen
            Pressure dewpoint probe for measurements in compressed air systems
              :
              0636 9835
              Rs 119,605.00
            • Pressure dewpoint probes
              Precision pressure dew point probe
              Precision pressure dew point probe with measuring chamber – measuring range: -40 to +50 °C tpd
                :
                0636 9836
                Rs 159,430.00

                • Radio handles and probe head

              • Radio handles and probe head
                Radio handle for plug-in probe heads
                Radio handle for plug-in probe heads, approval for the countries: DE, FR, UK, BE, NL, ES, IT, SE, AT, DK, FI, HU, CZ, PL, GR, CH, PT, SI, MT, CY, SK, LU, EE, LT, IE, LV, NO
                  :
                  0554 0189
                • Radio handles and probe head
                  T/C probe head for surface measurement
                  T/C probe head for surface measurement (T/C Type K)
                    :
                    0602 0394
                  • Radio handles and probe head
                    Compact professional humidity module
                    Compact professional humidity module for wireless humidity/temperature measurement
                      :
                      0636 9736

                      • Surface probes

                    • Surface probes
                      Spare meas. head for pipe wrap probe, TC Type K
                      Spare measuring head for pipe wrap probes (TC type K) - Measuring range: -60 to +130°C
                        :
                        0602 0092
                      • Surface probes
                        Fast-reaction paddle surface probe
                        Fast-reaction paddle surface probe (TC type K) - Measuring range: - 0 to +300°C
                          :
                          0602 0193
                          Rs 19,330.00
                        • Surface probes
                          Fast-action surface probe with sprung thermocouple strip
                          Fast-action surface probe (TC type K) – measuring range -60 to +300 °C, short-term up to +500 °C
                            :
                            0602 0393
                            Rs 18,685.00

                            • Thermocouples

                          • Thermocouples
                            Thermocouple with TC adapter, flexible, 800 mm long
                            Flexible thermoelectric couple (TC type K, glass fibre) – Measuring range: -50 to +400°C
                              :
                              0602 0644
                              Rs 2,855.00
                            • Thermocouples
                              Thermocouple with TC adapter, flexible, length 1500 mm
                              Flexible thermoelectric couple (TC type K, glass fibre) – measuring range -50 to +400°C
                                :
                                0602 0645
                                Rs 4,415.00
                              • Thermocouples
                                Thermocouple with TC adapter, flexible, 1500 mm long, PTFE
                                Flexible thermoelectric couple (TC type K, PTFE) – measuring range -50 to +250°C
                                  :
                                  0602 0646
                                  Rs 4,545.00

                                  • immersion/ penetration probes

                                • immersion/ penetration probes
                                  Efficient and fast-action immersion probe, waterproof
                                  Flexible, fast-action immersion probe (TC type K) – measuring range: -60 to +1000 °C
                                    :
                                    0602 0593
                                    Rs 14,530.00
                                  • immersion/ penetration probes
                                    Waterproof immersion/penetration probe, TC Type K
                                    Waterproof immersion/penetration probe (TC type K) – measuring range -60 to +400 °C
                                      :
                                      0602 1293
                                      Rs 6,750.00
                                    • immersion/ penetration probes
                                      Fast-action, waterproof immersion/penetration probe
                                      Fast-action immersion/penetration probe (TC type K) – measuring range: -60 to +800 °C
                                        :
                                        0602 2693
                                        Rs 18,035.00

                                        • Certificates

                                      • Certificates
                                        Calibration certificate
                                        ISO calibration certificate
                                          :
                                          0520 0006
                                        • Certificates
                                          Calibration certificate
                                          ISO temperature calibration certificate for surface probes; with 3 measuring points: +60 / +120 / +180 °C
                                            :
                                            0520 0071
                                          • Certificates
                                            Calibration certificate
                                            ISO calibration certificate
                                              :
                                              0520 0083

                                              • Further accessories measuring instrument/probes

                                            • Further accessories measuring instrument/probes
                                              Lithium battery, button cell
                                              Lithium battery, button cell, type CR 2032
                                                :
                                                0515 0028
                                              • Further accessories measuring instrument/probes
                                                Plug-in Power supply
                                                Plug-in mains adapter, 5 VDC 500 mA with European adapter, 100-250 VAC, 50-60 Hz
                                                  :
                                                  0554 0447
                                                  Rs 3,635.00
                                                • Further accessories measuring instrument/probes
                                                  External fast charger
                                                  External fast charger for 1-4 AA rech. batteries, incl. 4 Ni-MH rech. batteries with individual cell charging and charge control display, incl. impulse trickle charging, integrated discharge function, with built-in international mains plug, 100-240 V, 300 mA, 50/60 Hz
                                                    :
                                                    0554 0610

                                                    • Printer and accessories

                                                  • Printer and accessories
                                                    testo-Schnelldrucker IRDA mit kabelloser Infrarot-Schnittstelle
                                                    testo fast printer IRDA
                                                      :
                                                      0554 0549
                                                      Rs 32,095.00
                                                    • Printer and accessories
                                                      Spare thermal paper
                                                      Spare thermal paper for printer, permanent
                                                        :
                                                        0554 0568

                                                        • Radio handles and probe head for surface measurement

                                                      • Radio handles and probe head for surface measurement
                                                        Radio Module for measuring instrument
                                                        Radio module for measuring instrument, 869.85 MHz, approval for the countries: DE, FR, UK, BE, NL, ES, IT, SE, AT, DK, FI, HU, CZ, PL, GR, CH, PT, SI, MT, CY, SK, LU, EE, LT, IE, LV, NO
                                                          :
                                                          0554 0188
                                                        • Radio handles and probe head for surface measurement
                                                          Radio Module for measuring 915.00 MHz
                                                          Radio module for measuring instrument, 915.00 MHz FSK, approval for USA, CA, CL
                                                            :
                                                            0554 0190

                                                            • Radio handles, seperate county variant

                                                          • Radio handles, seperate county variant
                                                            Radio handle for plug-in probe heads
                                                            Radio handle for plug-in probe heads, approval for the countries: DE, FR, UK, BE, NL, ES, IT, SE, AT, DK, FI, HU, CZ, PL, GR, CH, PT, SI, MT, CY, SK, LU, EE, LT, IE, LV, NO
                                                              :
                                                              0554 0189
                                                            • Radio handles, seperate county variant
                                                              Radio handle for plug-in probe heads
                                                              Radio handle for plug-in probe heads, incl. T/C adapter, approval for USA, CA, CL
                                                                :
                                                                0554 0191

                                                                • Localising mould

                                                                Damp ceilings and walls may be a result of structural damage. In most cases, however, it is a sign of improper ventilation. Once the mould appears inside a house, the tenant assumes that moisture has come in from outside. Numerous disputes have erupted because of the issue of who is liable for the mould damage. However, it is difficult to find out who or what has caused the mould: the tenant or faulty structural design?

                                                                Testo 635-1 is ideal for measuring moisture in ceilings and walls. Using the optional attachment temperature/moisture probe and optional surface temperature probe, the testo 635 automatically calculates the dew point distance. It provides initial information about whether mould is being caused by condensation, or from moisture ingress due to structural damage or faulty insulation.

                                                                Monitoring production and storage conditions

                                                                Our temperature/humidity measuring instruments are used around the world in production, storage and server rooms, museums, archives, cold storage warehouses, containers and sales counters.

                                                                Manufacturers, carriers, or dealers of sensitive products must ensure that specified temperature or humidity values are observed during production and storage. The testo 635 offers the option of performing spot measurements in relevant places.

                                                                The temperature/humidity measuring instrument testo 635-2 offers the user a wide range of humidity/moisture probes. It provides the option of measuring humidity, material moisture and U-value (for the thermal assessment of structural components). In addition to the standard probes, up to three radio probes can be connected to the device in parallel. Measurement results can be analysed, stored and documented using the supplied PC software.