Get your Special Pricing!

641B-4 | Air velocity transmitter. | Dwyer Instruments

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

Search products similar to 641B-4

Jump to: Documents Overview Specifications Reviews

Documents and manuals

Dwyer Instruments 641B-4 Documents

Instruction Manual Model 641B Catalog Page More Info

Overview

Details for 641B-4

Dwyer Instruments NCO-641B-4 Air Velocity Transmitter: Precise and Reliable Airflow Measurement The Dwyer Instruments NCO-641B-4 Air Velocity Transmitter is engineered to provide precise and reliable measurement of air velocity. This transmitter is ideal for industrial engineers and maintenance professionals seeking accurate airflow data for various applications. Its sturdy construction and advanced features make it a valuable tool for optimizing airflow systems. Key Features: - Measures air velocity from 0 to 4000 FPM (feet per minute) - 4-20 mA output signal for easy integration with data acquisition systems - Compact design for easy installation in tight spaces - Rugged housing for durability in harsh environments Benefits: - Accurate airflow measurement for efficient system operation - Real-time monitoring of airflow conditions for proactive maintenance - Compact size for installation flexibility - Durable construction for long-lasting performance Applications: - HVAC systems - Air ducts and ventilation - Industrial airflow monitoring - Environmental monitoring Our HVAC supply store offers the best prices and fast shipping for the NCO-641B-4 Air Velocity Transmitter. Contact us today for expert assistance and to order your transmitter for precise airflow measurement.

MODEL 641B AIR VELOCITY TRANSMITTER

Dirty Air Flow Applications

The Series 641B Air Velocity Transmitter uses a heated mass flow sensor suitablefor dirty air flow applications. It has user-selectable ranges from 250 FPM (1.25 MPS)to 2000 FPM (10 MPS).

Product Applications

Exhaust stack flow monitoring
Air control in drying processes
HVAC air velocity measurements
Fan supply and exhaust tracking
Clean room ventilation monitoring

SS sensor suitable for dirty air flow measurement
Ranges from 250 FPM (1.25 MPS) to 2000 FPM (10 MPS)
4 to 20 mA output
Digital filter for signal damping

Specifications

Service: Air and compatible; non-combustible gases.
Accuracy: 5% FS process gas: 32 to 122°F (0 to 50°C); 6% 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 176°F (-40 to 80°C). Ambient: 32 to 140°F (0 to 60°C).
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.
Enclosure Rating: Designed to meet NEMA 4X (IP66) for non-LED models only.
Mounting Orientation: Unit not position sensitive.
Weight: 12.6 oz (357.2 g).
: *A brief current transient exceeding 300 mA may be seen on startup.