Air Velocity Transmitters

Features

AVT 251 and AVT 551

• Ranges
  -AVT 251: 0-5 m/s, 0-10 m/s, 0-15 m/s or 0-20 m/s
  -AVT 551: 0-1 m/s, 0-2 m/s, 0-3 m/s or 0-5 m/s
  -DIP switches selectable
• Two outputs for Air Velocity: 4-20 mA and 0-10 Vdc
• Accuracy Air Velocity: ± 5 % for 0-20 m/s
• Response time 1 second or 5 seconds DIP switches selectable
• Power supply 24 Vac/dc
• IP ratings
  -IP65 for enclosure
  -IP10 for probe
• Duct mounting flange with neoprene gasket for good sealing into the duct and to adjust the penetration probe depth

Extra features for AVT 251 MDR2B and AVT 551 MDR2B

• Modbus RS485 communication
• LCD Display
• 2 x relay outputs
• Buzzer

On request:

• Output 2-10 Vdc, 0-5 Vdc and 1-5 Vdc
• Output number 2 (AO2) can be supplied as Temperature output instead of Air Velocity output.
• Other combination AVT types on next page

Applications

• Duct sensor for air velocity measurement in HVAC systems.
• Measurement in ventilation ducts
• For control, surveillance, and regulation of the flow rate in fresh-air and ventilation systems, etc.
• HVAC supply or extract air measuring
• Clean room monitoring and control etc