Air velocity transmitter 56

Specifications (PDF)

The new Series 641 Air VelocityTransmitter is theideal instrument for monitoring air flow. This transmitteruses a heated mass flow sensor which allows for precisevelocity measurements at various flow rates and temperatures.The 641’s 16 field selectable ranges provides it theversatility to be selected for several air flow applications.The optional LED produces a complete, low-cost solution forlocal indication of air flow.

Service:Clean air and compatible, non-combustible gases.Accuracy: 3% FS Process gas: 32to 122°F (0 to 50°C); 4% FS Process gas: -40 to 32°F & 122to 212°F (-40 to 0°C & 50 to 100°C).Response Time: Flow: 1.5seconds to 95% of final value (output filter set to minimum).Temperature Limits: Process:-40 to 212°F (-40 to 100°C). Ambient: 32 to 140°F (0 to 60°C).Pressure Limit: 100 psi (6.89bar) maximum.Humidity Limit: Non-condensing.Power Requirements: 12-35 VDC,10-16 VAC. 1.5 A rating required on supply due to initial powersurge drawn by transmitter.Output Signal: 4-20 mA,isolated 24V source, 3 or 4-wire connection.Output Filter: Selectable0.5-15 (seconds).Loop Resistance: 600 ohms max.Current Consumption: 300 mAmax.Electrical Connections: Screwterminal.Process Connections: 1/2″male NPT.Enclosure Rating: Designed tomeet NEMA 4X (IP66) for non LED models only.Mounting Orientation: Unit notposition sensitive. Probe must be aligned with airflow.Weight: 12.6 oz (357.2 g).Agency Approvals: CE.
OPTIONAL DISPLAY VERSION:Display: 4-1/2 digit 1/2″red LED.Resolution: 1 FPM, 0.01 MPS (10FPM @ 10,000 and 15,000 FPM ranges).Weight: 13.3 oz (377 g).

• Ranges to 15,000 FPM or 75 MPS • Optional Bright LED Display • Easy Push Button Set-up • Compact Housing • 4-20 mA Output • Digital Filter for Signal Damping