Dwyer 641 [641-24] Air Velocity Transmitter 24 Inch Probe Length without Display

• Part Number: 641-24
• Probe Length: 24"
• Display: Without display
• For use with clean air and compatible, non-combustible gases
• Accurate up to ±3%
• 1.5 second response time
• Process temperature limit: -40 to 212°F
• Pressure limit: 100 psi (6.89 bar) maximum
• Ranges to 15,000 FPM or 75 MPS
• Optional bright LED display
• Easy push button set-up
• Compact housing
• 4-20 mA output, isolated 24V source, 3 or 4-wire connection
• Digital filter for signal damping
• Screw terminal electrical connection
• 1/2" male NPT process connection

• Service: Clean air and non-flammable compatible gases.
• Accuracy: 3% FS process gas: 32 to 122°F (0 to 50°C); Process FS 4%
• Gas: -40 to 32°F & 122 to 212°F (-40 to 0°C & 50 to 100°C).
• Response Time: Flow: 1.5 seconds to 95% of final value (output filter set to minimum).
• Temperature Limits: Process: -40 to 212°F (-40 to 100°C); Approx.: 32 to 140°F (0 to 60°C).
• Pressure Limit: 100 psi (6.89 bar) maximum.
• Humidity Limits: Non-condensing.
• Power requirements: 12 to 35 VDC, 10 to 16 VAC. The 1.5A rating is required on the supply due to the initial surge drawn by the transmitter.
• Output signal: 4 to 20 mA, isolated 24V source, 3 or 4 wire connection.
• Output Filter: Selectable 0.5 –15 (seconds).
• Loop resistance: max. 600 Ω
• Current consumption: max. 300 mA
• Electrical connection: Screw terminals.
• Processing connection: 1/2˝ NPT male.
• Enclosure rating: Designed to be NEMA 4X (IP66) compliant for non LED models only.
• Installation orientation: Unit is not position sensitive. The probe must be aligned with the airflow.
• Weight: 12.6 ounces (357.2 g).
• Agency Approval: CE.
• OPTIONAL DISPLAY Version: Display: Red LED 4-1/2 digits 1/2˝. Resolution: 1 FPM, 0.01 MPS (range 10 FPM @ 10,000 and 15,000 FPM).
• Weight: 13.3 ounces (377 g).

• (1) 24 Inch Probe Length
• (1) Instruction Manual

Brochure/Datasheet

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Instruction Manual

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