Starting at $490.00
  • Usually ships in 3-5 business days



  • Optional integral differential pressure sensor
  • -40 to 302°F temperature range
  • NTC temperature accuracy
    • ±1°F (-40 to -13.2°F)
    • ±0.7°F (167 to 211.8°F)
  • TC temperature accuracy
    • ±0.2°F + 0.3% of m.v.
  • Universal probe handle
  • Compatible with Bluetooth & wired probes
  • 0.1°F resolution
  • USB interface

What's in the Box

  • 3 AA batteries
  • USB cable
  • Calibration protocol


The Testo 440 air velocity & IAQ meter measures flow, heating and cooling load, K-factor, turbulence, data logging, and mold indication. It has a universal handle that is compatible with all air velocity and IAQ probes, enabling accurate measurements for any application. Kit options include wireless and wired probes offering a large selection of temperature, digital, and smart probes for an exact configuration to fit your needs.

The 440 stores up to 7,500 measurement points with a USB interface for exporting data. Reports can be generated and exported as excel files or printed out on site. Rear magnets offer secure attachment of the measuring instrument to metal surfaces.

Testo 440 dP includes integrated differential pressure sensor and connection hose, for measuring differential pressure ranges from -60 to +60 InH2O at filters, Pitot tubes, and for K-factor measurements.