Air Velocity Transmitters Dwyer Series 641

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Product information

The Dwyer Series 641 Air Velocity Transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various field-selectable ranges.

✔ Flexible Ranges: 16 field-selectable ranges from 250 to 15,000 FPM (up to 75 MPS) via DIP switches

✔ Temperature Compensation: Heated mass flow sensor ensures accuracy regardless of temperature or pressure

✔ Signal Smoothing: Adjustable time constant allows for averaging output in fluctuating flow conditions

✔ Optional Display: Available with integrated bright LED display for easy local process monitoring

✔ Robust Build: Compact polycarbonate housing rated NEMA 4X (IP66) for superior protection

DOWNLOAD SERIES 641 CATALOG (PDF)

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🚚 Direct Importer by DLK TRADING SERVICE COMPANY LIMITED .
✅ Quality : 100% Brand New , genuine products with complete import documentation.
🛠️ Warranty : 12 Months (optional 36 Months ).
📞 Phone : 0937972339

Technical characteristics
Name of the product
Standard technical document

Detailed Specifications

Brand	DWYER (USA)
Service	Clean air and compatible non-combustible gases
Accuracy	3% FS @ 40 to 90°F (4.4 to 32.2°C)
Temperature Limits	32 to 140°F (0 to 60°C)
Pressure Limits	100 psi (6.89 bar) maximum
Output Signal	4-20 mA DC, 2-wire
Power Requirements	12-35 VDC or 10-16 VAC
Enclosure Rating	NEMA 4X (IP66) polycarbonate

Series 641 Model Selection Chart

Model Number	Probe Length	Description
641-6	6˝ (152.4 mm)	Standard unit
641-6-NIST	6˝ (152.4 mm)	NIST traceable calibration
641-6-LED	6˝ (152.4 mm)	With LED display
641-12	12˝ (304.8 mm)	Standard unit
641-12-NIST	12˝ (304.8 mm)	NIST traceable calibration
641-12-LED	12˝ (304.8 mm)	With LED display
641-18	18˝ (457.2 mm)	Standard unit
641-18-NIST	18˝ (457.2 mm)	NIST traceable calibration
641-18-LED	18˝ (457.2 mm)	With LED display
641-24	24˝ (609.6 mm)	Standard unit
641-24-NIST	24˝ (609.6 mm)	NIST traceable calibration
641-24-LED	24˝ (609.6 mm)	With LED display