Popis
The Series 641 Air Velocity Transmitter is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures. The 641s 16 field selectable ranges provides it the versatility to be selected for several air flow applications. The optional LED produces a complete, low-cost solution for local indication of air flow.
Product Applications:
Exhaust stack flow monitoring
Air control in drying processes
HVAC air velocity measurements
Fan supply and exhaust tracking
Clean room fresh air supply
Ensure proper lab hood exhaust flow rates
SPECIFICATIONS:
Service: Clean air and compatible, non-combustible gases
Accuracy: 3% FS process gas: 0 to 50°C; 4% FS process gas: -40 to 0°C and 50 to 100°C
Response Time: Flow: 1.5 s to 95% of final value (output filter set to minimum)
Temperature Limits: Process: -40 to 100°C; Ambient: 0 to 60°C
Pressure Limit: 100 psi (6.89 bar) maximum
Humidity Limit: Non-condensing
Power Requirements: 12-35 VDC, 10-16 VAC. 1.5 A rating required on supply due to initial power surge drawn by transmitter
Output Signal: 4-20 mA, isolated 24 V source, 3 or 4-wire connection
Output Filter: Selectable 0.5-15 (s)
Loop Resistance: 600max.
Current Consumption: 300 mA max.
Electrical Connections: Screw terminal
Process Connections: 1/2 male NPT
Enclosure Rating: Designed to meet NEMA 4X (IP66) for non LED models only
Mounting Orientation: Unit not position sensitive. Probe must be aligned with airflow
Weight: 357 g
OPTIONAL DISPLAY VERSION:
Display: 4-1/2 digit 1/2 red LED
Resolution: 1 FPM (10 FPM @ 10,000 and 15,000 FPM ranges)
Weight: 377 g
Complete informations can be found in the spec sheet (PDF), see the „Download“ section.
