The VelociCalc^® Multi-Function Ventilation Meter 9565 features a menu-driven user interface for easy operation in your local language. On-screen prompts and step-by-step instructions guide the user through instrument setup, operation and field calibration.

The 9565 also features an ergonomic, over-molded case design with probe holder and a keypad lockout to prevent tampering during unattended use. The 9565 model includes the Straight Air Velocity Probe 964 and is designed to work with a wide range of plug-in probes.