Air Velocity Transmitter AVT-series

• Sensor Placement: Located at the probe tip for accurate air velocity and temperature measurements.
• Enclosure Design: IP65-rated housing with easy access via one screw and two snap lids. Includes a plastic cable entry gland.
• Probe Material: Durable plastic construction for long-term use.
• Mounting Flange: Includes a duct mounting flange with a neoprene gasket for secure and adjustable installation.
• Optional Features (On Request):
  • Alternative outputs (2-10 Vdc, 0-5 Vdc, or 1-5 Vdc)
  • Second output (AO2) configurable for temperature output instead of air velocity

This detailed breakdown ensures all product features and differentiators are presented clearly for easy selection based on application requirements.

• 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.

AVT 251

Air Velocity transmitter

Ranges 0-5 m/s, 0-10 m/s, 0-15 m/s or 0-20 m/s, DIP switches selectable

Output 1 (AO1) : 4-20 mA

Output 2 (AO2) : 0-10 Vdc

AVT 551

Air Velocity transmitter

Ranges 0-1 m/s, 0-2 m/s, 0-3 m/s or 0-5 m/s, DIP switches selectable

Output 1 (AO1) : 4-20 mA

Output 2 (AO2) : 0-10 Vdc

AVT 251 MDR2B

Air Velocity transmitter

Ranges 0-5 m/s, 0-10 m/s, 0-15 m/s or 0-20 m/s, DIP switches selectable

Output 1 (AO1) : 4-20 mA

Output 2 (AO2) : 0-10 Vdc

Modbus RS485 communication

LCD Display

2 x Relay outputs

Buzzer

AVT 551 MDR2B

Air Velocity transmitter

Ranges 0-1 m/s, 0-2 m/s, 0-3 m/s or 0-5 m/s, DIP switches selectable

Output 1 (AO1) : 4-20 mA

Output 2 (AO2) : 0-10 Vdc

Modbus RS485 communication

LCD Display

2 x Relay outputs

Buzzer

The 4 above types are standard types, other types available in technical data sheet.”