The testo 440 Air Velocity and IAQ Meter combines all the benefits of a compact handheld device with intuitive measurement menus and a comprehensive selection of air velocity & IAQ probes. This means you have all measuring tasks on air conditioning and ventilation systems reliably under control. You can connect the testo 440 to a large selection of digital probes, testo Smart Probes, or even numerous testo temperature probes, allowing for numerous configurations to meet your needs. The clearly structured menus for measuring volume flow in ducts and at outlets, cooling/heating load, K-factor, turbulence, mold indication and even a data logging mode are stored on the instrument for additional convenience. These menus enable you to accomplish your measuring tasks more quickly, more efficiently and more reliably than ever before. Reports can also be exported as excel files via the USB interface or printed out directly on site.
• Use the humidity/temperature probe to measure relative humidity and air temperature, and to calculate dew point, wet bulb temperature, absolute humidity, and heating/cooling output
• Reliable measurement results, thanks to a high quality, long-term, stable humidity sensor
• Measuring range: 0 to 100% RH and -4 to +158 °F, accuracy of ±2% RH and ±0.9 °F
• Versatile – the universal handle can be connected to all probe heads, so you can take care of more applications, and use less equipment
• The Bluetooth handle makes it more convenient to carry out your measurements and guarantees less cable clutter in your case – it transmits readings to the testo 440, from up to 65 feet away
• Practical button on the handle – for storing individual readings
• Intelligent calibration concept – the testo 440 remains in continuous use, only the individual probes need calibration

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