Testo 440 Data Logging Air Quality Monitor for Air Velocity

This air quality monitor from Testo measures air velocity and IAQ (indoor air quality) to help you maintain a contaminant-free environment. This device is compatible with Bluetooth probes, wired probes and type K thermocouple probes to measure a broad range of parameters. It comes with automatic probe detection technology, so you don't need to reset the monitor when you change probes. For versatility, this unit also features an integrated differential pressure sensor so you can monitor the difference in pressure between two points.