The AVT 251 is designed for precise air velocity measurement in HVAC system ventilation ducts. It features selectable air velocity ranges of 0-5 m/s, 0-10 m/s, 0-15 m/s, or 0-20 m/s, adjustable via DIP switches. The transmitter provides dual outputs for air velocity: 4-20 mA and 0-10 Vdc, ensuring compatibility with various systems.
Key specifications:
- Air Velocity Accuracy: ±5% for 0-20 m/s
- Temperature Accuracy: ±0.5°C at a minimum air velocity of 1 m/s
- Power Supply: 24 Vac/dc
- Response Time: Selectable 1 second or 5 seconds via DIP switches
- Enclosure and Probe: IP65 enclosure with an IP10-rated plastic probe
- Mounting: Supplied with a duct mounting flange featuring a neoprene gasket for optimal sealing. The penetration depth is adjustable.