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Series-641
Heated Mass Flow Air Velocity Transmitter ± 16 Ranges, NIST Calibrated
- Ranges from 250 FPM (1.25 MPS) to 15,000 FPM (75 MPS)
- Optional bright LED display
- Easy push button set-up
- Compact housing
- 4 to 20 mA output
- Digital filter for signal damping
Series-641
From
$
704.75
Product Overview
- Accuracy ± 3 %
- Accuracy Note 3% FS process gas: 32 to 122°F (0 to 50°C); 4% FS process gas: -40 to 32°F and 122 to 212°F
- Air Velocity, Max 15000 FPM
- Air Velocity, Min 250 FPM
- Compliance CE
- Electrical Connection Screw Terminal
- Electrical Output 4 to 20 mA
- Filter 0.5 to 15 s (Selectable)
- Loop Resistance 600 Ω max
- Media Compatibility Argon, Carbon dioxide, Clean Dry Air, Helium, Nitrogen, Non-Corrosive Dry Gases
- Mounting Orientation None
- Number of Wires 4
- Operating Temperature, Max 140 °F
- Operating Temperature, Min 32 °F
- Output Detail 4 to 20 mA, isolated 24 V source, 3 or 4-wire connection
- Power Consumption 300 mA
- Pressure Limits Up to 100 psi
- Process Connection Size 1/2 in
- Process Connection Type NPT Male
- Process Temperature, Max 212 °F
- Process Temperature, Min -40 °F
- Relative Humidity Non-Condensing
- Response Time 1.5 s to 95%
- Response Time Note Flow: 1.5 s to 95% of final value (output filter set to minimum)
- 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
- Supply Voltage 10 to 16 Vac, 12 to 35 Vdc
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 641’s 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.
NIST CALIBRATION available in Product Configurator.
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