Humidity/temperature measuring instrument - testo 645

Product catalog summary

Overview: The testo 645 is a precision thermal hygrometer tailored for industrial use, featuring dual probe inputs for extensive temperature and humidity assessments.

Specifications:

Probe Inputs: Channel 1 accommodates temperature probes Type K/J/S, NTC; Channel 2 supports a combination probe for humidity/temperature or a temperature probe Pt 100.
Measurement Parameters: Includes temperature, relative humidity, dewpoint, pressure dewpoint, absolute humidity, degree of humidity, and enthalpy.
Data Storage: Stores up to 3000 measurement values, with options for PC analysis or printing via the Testo fast printer.
Operating Conditions: Functions within 0 to +50 °C, with storage capabilities from -20 to +70 °C.
Display: Features a 4-line LCD.
Battery Life: Operates for 45 hours using alkali manganese batteries.
Dimensions and Weight: Measures 215 x 68 x 47 mm and weighs 255 g.

Accuracy and Range:

Temperature Accuracy: ±1 digit at +22°C.
Humidity Measurement: Accuracy up to ±1 %RH.
Sensor Types and Ranges: Includes Pt100, Type K, Type S, Type J, and NTC sensors, each with specific accuracy and resolution details.

Accessories:

Includes a transport case and TopSafe protection case for secure storage.
Offers Testo fast printer and ComSoft Professional 4 Pro software for data documentation and analysis.
Provides various calibration certificates and spare parts.

Probes: Offers a diverse range of probes for different applications, such as surface, immersion, penetration, and humidity probes, each with distinct measurement ranges and accuracy levels.

Additional Features:

Facilitates data analysis with PC software.
Includes button functions for holding, min/max values, and mean value calculation.

Catalog excerpts

Humidity/temperature measuring instrument - testo 645-1

measuring instrument testo 645 - Highly precise Highly accurate humidity measurement up to ±1 %RH Connection of 2 plug-in probes Measurement of temperature, relative humidity and pressure Internal measurement store (3000 measurement values) PC software for the analysis, archiving and documentation of the measurement values (option) Button for Hold, min./max. values, mean value calculation Convenient data analysis The highly accurate thermal hygrometer testo 645 has two probe inputs for the connection of an extensive range of - Channel 1: temperature Type K/J/S, NTC - Channel 2: combi probe humidity/temperature or The measuring instrument automatically displays the measurement parameters temperature, relative humidity, dewpoint, pressure dewpoint, absolute humidity, degree of humidity and enthalpy, and additionally presents the current values, the last measured values, min., max. and mean values at the press of a button. Measurement data can be stored by measurement site in the testo 645, and analyzed on a PC, or documented using the Testo fast printer (option). The TopSafe (option) is available for tough applications. The measuring instrument probes and accessories can be stored safely and tidily in the transport case (option).

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Humidity/temperature measuring instrument - testo 645-2

Technical data testo 645, humidity/temperature measuring instrument, with battery and calibration protocol General technical data Accuracy of temperature: ± 1 digit at +22°C NI 10000 sensor: meas, range: ...+180°C Typical battery lives: 9V block (Al-Mn) 20-45h. The hour times are reduced by a factor of 5 If a 9V rech. battery is Calculated humidity parameters: td, g/m3, g/kg, J/g (pressure Mains connection and battery recharging in Instrument The highly accurate thermal hygrometer testo 645 has two probe inputs for the connection of an extensive range of - Channel 1: temperature Type K/J/S, NTC...

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