Dwyer 641B-4 SERIES 641B AIR VELOCITY TRANSMITTERS

Name: Dwyer 641B-4 SERIES 641B AIR VELOCITY TRANSMITTERS
Brand: BNSENS Co., Ltd.
SKU: 2281039085

Jiangsu, ChinaBNSENS Co., Ltd.

US$1.00-499.00

1 Piece

Sample price:US$50.00/piece.Request sample

Product profile

Customization

Available

Type

Air velocity transmitter

Output Signal Type

Digital Type

Model NO.

641B-4

IP Rating

IP66

Sensitivity

High

Certification

Customized

Non-Customized

Model

641B-4

Service

Dirty Air Flow Applications

Accuracy

5% FS process gas: 32 to 122°F (0 to 50°C); 6% FS

Response Time

Flow: 1.5 s to 95% of final value (output filter s

Temperature Limits

Process: -40 to 176°F (-40 to 80°C); Ambient: 32

Range

250 FPM (1.25 MPS) to 2000 FPM (10 MPS)

Humidity Limit

Non-condensing

Power Requirements

12-35 VDC, 10-16 VAC. 1.5 A rating required on sup

Output Signal

4-20 mA, isolated 24 V source, 3 or 4-wire connect

Output Filter

Selectable 0.5-15 (s)

Loop Resistance

600 Ω max.

Current Consumption

300 mA max

Electrical Connections

Screw terminal

Weight

12.6 oz (357.2 g)

Transport Package

Carton

Trademark

Dwyer

Origin

Amercia

Key features

Heated Mass Flow Sensor: Designed for dirty air flow applications using heated mass flow sensor technology.

Stainless Steel Durability: Stainless steel sensor suitable for dirty air flow measurement and exhaust stack monitoring.

Wide Range Selection: User-selectable ranges from 250 FPM (1.25 MPS) to 2000 FPM (10 MPS).

IP66 Protection Rating: Enclosure rating designed to meet NEMA 4X (IP66) for non-LED models.

Digital Signal Damping: Digital filter for signal damping with selectable output filter from 0.5 to 15 seconds.

Versatile Power Supply: Supports 12-35 VDC and 10-16 VAC power requirements with isolated 24 V source.

CE Certification: Product holds CE certification ensuring compliance with relevant safety standards.

Multiple Output Options: 4-20 mA output signal with 3 or 4-wire connection options available.

Company profile

Importers and ExportersFast DeliveryQuality Assurance100% Finished Products Inspection

BNSENS Co., Ltd.

Jiangsu, China

Business Type: Manufacturer/FactoryAverage Response Time: ≤3.01h

AI-Powered supplier vetting

SummaryBNSENS Co., Ltd. is identified as a Chinese manufacturer/factory in Jiangsu specializing in sensors and transmitters for pressure, level, temperature, flow, current, switching, and position applications. The supplier describes MEMS and independently developed ASIC expertise, a U.S.-based R&D center, and supply or cooperation relationships involving Emerson, SICK, TSMC, Siemens, Infineon, and Rohm. Its products are reported as serving multiple industrial sectors, and an audit was conducted by BV; however, the audit result and type are provided only as codes, so certification or compliance conclusions cannot be made. Information on after-sales service, financial credibility, quality systems, customization, sustainability, and several R&D services is insufficient. The stated registered capital is omitted from this assessment for privacy.

Supplier typeThe supplier is explicitly identified as a Manufacturer/Factory and a high-tech enterprise specializing in sensor development, manufacturing, and trade. Its stated business scope is Electrical & Electronics, and its listed products cover multiple sensor and transmitter categories.

R&D capabilityBNSENS describes a sensor R&D center in Minnesota, core MEMS-chip technology, independently developed ASIC chips, German-origin production-line introduction, and development of additional industrial-control sensors. These statements provide explicit evidence of R&D and technology activity, although the scope and verification of the capabilities are not further documented.

Production capacityThe supplier is classified as a factory and states that it develops and manufactures a broad range of sensor products. Its history includes a sensor production-line introduction and factory relocation, while reported use across oil, gas, power, chemical, metallurgy, food, environmental protection, aerospace, and municipal applications supports production experience; actual capacity, equipment scale, and output data are not provided.

Client casesThe supplier reports that its products are used across numerous industries and cites relationships or sales involving Emerson, SICK, TSMC, Siemens in Vietnam, Infineon, and Rohm. These are explicit customer or business-cooperation claims, but the slices do not provide project details, order scope, duration, or independently verified case evidence.

Product Q&A

Q:Is this product customizable?

No, the product is explicitly listed as Non-Customized.

Q:What is the response time of the sensor?

The flow response time is 1.5 seconds to 95% of the final value, with the output filter set to minimum.

Q:What applications is this transmitter suitable for?

It is suitable for exhaust stack flow monitoring, air control in drying processes, HVAC air velocity measurements, fan supply and exhaust tracking, and clean room ventilation monitoring.

Q:Does the unit have specific mounting orientation requirements?

No, the unit is not position sensitive regarding mounting orientation.

Q:What electrical connections does the device use?

The device uses screw terminal electrical connections.