Testo 645 Humidity/Temperature Measuring Instrument

Testo 645 Humidity/Temperature Measuring Instrument consequently demonstrate the estimation parameters of relative dampness, supreme moistness, dew point, level of stickiness, enthalpy, and temperature at the dash of a catch.

Applications: Monitoring of temperature and humidity values in production, storage and server rooms, museums, archives, cold stores, containers, and display cases.



  HTTPS Secured PaymentHTTPS, the lock icon in the address bar, an encrypted website connection. While it was once reserved primarily for passwords and other sensitive data, the entire web is gradually leaving HTTP behind and switching to HTTPS. The 'S' in HTTPS stands for 'Secure'. It’s the secure version of the standard “hypertext transfer protocol”. Most importantly, your payment is also secured.

   Bulk Purchase? Reach us for special price
  Free shipping all over India
  Ask a question?

Country : United States

Product Description

Testo 645 Humidity/Temperature Measuring Instrument measuring instrument offer two probe inputs for attaching a comprehensive range of probes:

Channel 1: temperature probe, type K/J/S, NTC
Channel 2: humidity/temperature probe or Pt 100 temperature probe

At the touch of a button, the Thermohygrometer automatically indicates the measurement parameters of temperature, relative humidity, dew point, pressure dew point, absolute humidity, degree of humidity and enthalpy, along with min., max. and mean values, as well as the last measured value. Convenient evaluation of the measurement data is possible using the optional PC software. Measurement data can also be printed out directly at the measuring location via the optional Testo fast printer.

Features of Testo Humidity/Temperature Measuring Instrument:

  • High precision humidity measurement up to ± 1% RH
  • It can read up to 3,000 readings (Internal reading memory)
  • Convenient data evaluation via optional PC software
  • Possibility of attaching a really wide range of optional probes.

Additional Information

Weight 1 kg
Model No
Measuring Parameters Humidity - Capacitive, Pt100, Temperature - NTC, Temperature - TC Type J (Fe-CuNi), Temperature - TC Type K (NiCr-Ni), Temperature - TC Type S (Pt10Rh-Pt)
Accuracy ±0.1 % of mv (200.1 to 800 °C), ±0.2 °C (-200 to 200 °C)
Temperature - NTC -50 to +150 °C
Temperature - TC Type K (NiCr-Ni)
Accuracy_1 , ,
Temperature - TC Type J
Accuracy_2 ±0.3 °C (-60 to +60 °C), ±0.5 % of mv (+60.1 to +750 °C), ±0.5 % of mv (-200 to -60.1 °C)
Temperature - TC Type S (Pt10Rh-Pt) -50 to +1700 °C
Humidity - Capacitive
Accuracy_3 See probe data
Operating Temperature
Storage Temperature
Number of channels
Battery Life
Display Size/Type


There are no reviews yet.

Be the first to review “Testo 645 Humidity/Temperature Measuring Instrument”