Features Ranges AVT 251 and AVT 251 MDR 2B: 0-5 m/s, 0-10 m/s, 0-15 m/s or 0-20 m/s DIP switches selectable AVT 551 and AVT 551 MDR2B: 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 as standard 2-10 Vdc, 0-5 Vdc and 1-5 Vdc on request 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 for adjust the penetration probe depth AVT 251 MDR2B and AVT 551 MDR2B with: Modbus RS485 communication LCD Display 2 x relay outputs Buzzer
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