Get your Special Pricing!

Brand: Dwyer InstrumentsSKU: 641-18

List Price
~~$2,162.00~~

$720.58

Availability: This product is currently available to purchase

Orders over $999 ship FREE*

The product is not cancelable or returnable unless found defective

*Free shipping applies within the continental US and weighing less than 50 lbs.

Shipping and Returns Terms

Speak With a Technical Expert

Call (847) 773-1023

Hours: 9am - 5pm CDT M-F

641-18 | Air velocity transmitter | 18" (457.2 mm) probe length. | Dwyer Instruments

The photo is for representation purposes only and may not be a photo of product being purchased.

Search products similar to 641-18

Jump to: Documents Overview Specifications Reviews

Documents and manuals

Dwyer Instruments 641-18 Documents

Instruction Manual Series 641 Catalog Page 641 More Info

Overview

Details for 641-18

Accurate Air Velocity Measurements: Dwyer Instruments NCO-641-18 Air Velocity Transmitter The Dwyer Instruments NCO-641-18 Air Velocity Transmitter is an essential tool for industrial engineers and maintenance professionals seeking precise air velocity measurements. This transmitter features an 18" probe, providing engineers with accurate readings even in hard-to-reach areas. Crafted with durability in mind, the NCO-641-18 boasts a robust construction that withstands the demands of industrial environments. Its rugged design ensures reliable performance, even under harsh operating conditions. The transmitter's advanced sensor technology allows for accurate air velocity measurements across a wide range, making it suitable for diverse applications. The NCO-641-18 is ideal for measuring airflow in HVAC systems, industrial processes, and environmental monitoring. Key Features: 18" probe for extended reach Durable construction for industrial environments Accurate air velocity measurements Wide measurement range Maximize your efficiency with the Dwyer Instruments NCO-641-18 Air Velocity Transmitter. Contact our HVAC supply store today for the best prices and fast shipping on all your industrial supply needs!

Series 641 Air Velocity Transmitter

High Accuracy, Field Selectable Ranges

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

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

Specifications

Series: 641 Air Velocity Transmitter
Category/Type: Air Velocity
Type: Air Velocity Transmitter
Series: 641 Air Velocity Transmitter
Service: Clean air and compatible; non-combustible gases.
Accuracy: 3% FS Process gas: 32 to 122°F (0 to 50°C); 4% FS Process gas: -40 to 32°F & 122 to 212°F (-40 to 0°C & 50 to 100°C).
Response Time: Flow: 1.5 s to 95% of final value (output filter set to min.).
Temperature Limits: Process: -40 to 212°F (-40 to 100°C). Ambient: 32 to 140°F (0 to 60°C).
Pressure Limit: 100 psi (6.89 bar) maximum.
Humidity Limit: Non-condensing.
Power Requirements: 12 to 35 VDC; 10 to 16 VAC. 1.5 A rating required on supply due to initial power surge drawn by transmitter.
Output Signal: 4 to 20 mA; isolated 24 V source; 3 or 4-wire connection.
Output Filter: Selectable 0.5-15 s.
Loop Resistance: 600 Ω max.
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: 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 (10 FPM @ 10;000 and 15;000 FPM ranges).
Weight: 13.3 oz (377 g).