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Dwyer Transmitter 645-3 - Measurement
DwyerMeasurement

Dwyer Transmitter 645-3

Dwyer 645-3 is a pressure transmitter for industrial process monitoring, delivering ±0.25% accuracy across 0 to 0.69 bar range with 30 to 50 ms response time. IP65-rated stainless steel/aluminum enclosure suits…

SKU 3G-CBM-02201

Brand
Dwyer
Item
Transmitter 645-3
Category
Measurement
UNSPSC
41112412 — Pressure gauge
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Dwyer
accuracy
±0.25%
ip rating
IP65
connection
1/4"-18 femelle NPT
response time
30 à 50 ms
pressure range
0 à 10 psid
loop resistance
0 à 1000Ω
enclosure material
Acier inoxydable/aluminium
pressure range bar
0 à 0.69

Technical Documents

(1)
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Dwyer Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

Dwyer 645-3 is a pressure transmitter for industrial process monitoring, delivering ±0.25% accuracy across 0 to 0.69 bar range with 30 to 50 ms response time. IP65-rated stainless steel/aluminum enclosure suits demanding environments requiring reliable differential pressure measurement.

Frequently Asked Questions

What is the Dwyer 645-3 pressure transmitter used for?

The Dwyer 645-3 is a differential pressure transmitter designed for industrial process monitoring, filter status, refrigeration, pump flow control, HVAC equipment, and liquid level measurement. It delivers a 4-20 mA output proportional to differential pressure with ±0.25% accuracy, suitable for gases and liquids compatible with wetted materials.

What are the specifications of the Dwyer 645-3 transmitter?

The Dwyer 645-3 has a pressure range of 0 to 0.69 bar (0 to 10 psid), accuracy ±0.25% FS, response time 30 to 50 ms, IP65 stainless steel/aluminum enclosure, 1/4"-18 female NPT connection, loop resistance 0 to 1000 Ω, and requires 11 to 30 VDC power. It is CE approved.

Where to buy the Dwyer 645-3 in Singapore?

3G Electric supplies the Dwyer 645-3 pressure transmitter to Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact our team for pricing and lead time on this SKU (3G-CBM-02201). We provide local technical support for industrial process monitoring applications.

How to install the Dwyer 645-3 differential pressure transmitter?

Mount the Dwyer 645-3 in a location free from excessive vibration. Connect 1/4" NPT high and low pressure ports, ensuring bleed screws are open to purge air. Wire 11-30 VDC to the terminal block per the diagram. Use the optional 3-valve manifold for easy zero/span adjustment and maintenance.

Used in

Common applications for Dwyer
Combustion air-filter monitoring — Magnehelic Series 2000 on burner air-intake filter banks
Clean-room and pharmaceutical pressurisation — Magnehelic / Capsuhelic differential-pressure gauges
HVAC fan-discharge static pressure — Mark II inclined-vertical manometers on AHU test points
Filter-blockage alarms — Photohelic Series 3000 combined gauge/switch on air-handling units
BMS-integrated pressure monitoring — Digihelic DH3 with 4–20 mA output for building management
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Dwyer Products

3G Electric supplies Dwyer measurement. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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