The Series 641 Air Velocity Transmitters are the ideal instrument for monitoring air
flow. This transmitter uses a heated mass flow sensor which allows for precise velocity
measurements at various flow rates and temperatures. The 641's 16 field-selectable
ranges provides it the versatility to be selected for several air flow applications. The
optional LED produces a complete, low-cost solution for local indication of air flow.
Features:- Ranges from 250 FPM (1.25 MPS) to 15,000 FPM (75 MPS)
- Optional bright LED display
- Easy push-button set-up
- Compact housing
- 4-20 mA output
- Digital filter for signal damping