The testo 645 humidity and temperature measuring instrument automatically indicates the measurement parameters of relative humidity, absolute humidity, dew point, degree of humidity, enthalpy, and temperature, at the touch of a button.

The testo 645 humidity measuring instrument automatically displays the parameters relative humidity, absolute humidity, dew point, degree of humidity, enthalpy, and temperature. Convenient data analysis on your PC with location name.

Features:

High-precision humidity measurement up to ± 1% RH
Internal reading memory (3,000 readings)
Convenient data evaluation via optional PC software
Possibility of attaching a really wide range of optional probes thanks to a large accessory portfolio

More products TESTO

TESTO 540 - LIGHT METER

• For quick and easy measurements in the workplace
• Sensor based on the spectral sensitivity of the human eye
• Hold function, min/max values
• Protective cap for safe storage

TESTO 545 - LIGHT METER

• Precise light intensity readings in lux
• Large memory of up to 3,000 readings
• Selective / time-based averaging
• Measuring site management with optional software: up to 99 measuring sites available

TESTO 316-1 - GAS LEAK DETECTOR

• Speedy and accurate leak detection in natural gas pipes
• Audible and two-stage visual alarm
• Audible alarm if limit value is exceeded
• Optical alarm

TESTO 476 - POCKET STROBE HANDHELD STROBOSCOPE

• High adjustment accuracy and stability thanks to dynamic setting dial
• High light intensity thanks to high-performance xenon flashlamp
• Powerful Li-Ion rechargeable battery pack for at least 2 hours of continuous operation
• Extremely short flash duration (< 9 µs)

TESTO 160 THL - WI-FI DATA LOGGER WITH INTERNAL TEMPERATURE, HUMIDITY, LUX, AND UV RADIATION SENSORS

• Data logger with internal sensors for temperature, humidity, cumulative lux, and UV exposure level recording
• Optional paintable logger cover helps conceal the logger in an exhibit
• Logger sends data to the Testo Cloud using your existing Wi-Fi network, alarms by email (Basic License), and optional text messages with the Advanced License
• Simple to install, integrate, and operate

TESTO 312-3 - PRESSURE MEASURING INSTRUMENT UP TO 300/6000 HPA

• Load and tightness tests of gas pipes
• Pressure testing of water pipes using air
• Switchable measuring ranges with high resolution
• Alarm indicator for undershooting of freely adjustable limit values

TESTO 410-2 - VANE ANEMOMETER WITH HUMIDITY MEASUREMENT

• Integrated RH sensor provides %rH, wet bulb, and dew point readings
• Small 1.5 inch vane meter
• Hold, Min, Max, and Timed averaging
• Lens cover and leather belt case keep it protected - even in your tool box

TESTO 720 - TEMPERATURE METER

• Port for one RTD or NTC sensor
• Wide range of optional sensors for individual requirements
• User-defined thresholds, audible alarm
• Optional accessories for individual adaptation, like protection against aggressive media for use in laboratories

TESTO 750-3 - DIGITAL VOLTAGE TESTER WITH GFCI TEST

• GFCI Test Function
• 3-digit LCD showing the actual voltage
• measurements
• Patented all-around viewable LED voltage bar indication
• Built-in flashlight for testing in dark places

TESTO 440 - AIR VELOCITY AND IAQ MEASURING INSTRUMENT

• Intuitive: Clearly structured measurement menus for volume flow, degree of turbulence, heating/cooling output, mold detection, and long-term measurement, such as CO2
• Wireless: Optional Bluetooth probes for extra convenience when measuring, and less cable clutter in your instrument's case (probes sold separately)
• Clear Overview: Large graphic display with parallel display of 3 readings
• Reliable: Internal memory for data storage and USB port for data export