Dwyer 641B-4-LED Heated Mass Flow Air Velocity Transmitter, 250-2000 FPM, HVAC/Exhaust (2000 FPM, ± 5 %)

Filter: 0.5 to 15 s (Selectable)

Weight: 12.6 oz

Accuracy: ± 5 %

Display Type: LED

Probe Length: 4 in

Accuracy Note: 5% FS process gas: 32 to 122°F (0 to 50°C); 6% FS process gas: -40 to 32°F and 122 to 176°F (-40 to 0°C and 50 to 80°C)

Output Detail: 4 to 20 mA, isolated 24 V source, 3 or 4-wire connection

Response Time: 1.5 s to 95%

Supply Voltage: 10 to 16 Vac, 12 to 35 Vdc

Loop Resistance: 600 Ω max

Number of Wires: 4

Air Velocity, Max: 2000 FPM

Air Velocity, Min: 250 FPM

Electrical Output: 4 to 20 mA

Power Consumption: 300 mA

Relative Humidity: Non-Condensing

Supply Power Note: 12 to 35 Vdc, 10 to16 Vac. 1.5 A rating required on supply due to initial power surge drawn by transmitter

Supply Power Type: AC/DC

Response Time Note: Flow: 1.5 s to 95% of final value (output filter set to minimum)

Media Compatibility: Air, Argon, Carbon dioxide, Helium, Nitrogen, Non-Corrosive Dry Gases

Mounting Orientation: None

Electrical Connection: Screw Terminal

Process Temperature, Max: 176 °F

Process Temperature, Min: -40 °F

Operating Temperature, Max: 140 °F

Operating Temperature, Min: 32 °F

Datasheet