Testo 400 - Universal Airflow / IAQ Instrument, Probes Sold Separately (Part Number 0560 0400) | ThermalCameraExperts
Testo 440-IAQ-KIT (0563 4408) Bluetooth Indoor Comfort Combo Kit with 440 Air Velocity and IAQ Measuring Meter, CO2 Probe, Turbulence Probe- at the Test Equipment Depot