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DwyerMeasurement

Dwyer Transmitter 645-0

Dwyer Transmitter 645-0 is a pressure measurement device delivering ±0.25% accuracy across 0 to 1 psid range with 30 to 50 ms response time. IP65-rated stainless steel/aluminum housing suits industrial process…

SKU 3G-CBM-02198

Brand
Dwyer
Item
Transmitter 645-0
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 female NPT
response time
30 to 50 ms
pressure range
0 to 1 psid
loop resistance
0 to 1000 Ω
housing material
Stainless steel/aluminium

Technical Documents

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

Product Description

Dwyer Transmitter 645-0 is a pressure measurement device delivering ±0.25% accuracy across 0 to 1 psid range with 30 to 50 ms response time. IP65-rated stainless steel/aluminum housing suits industrial process control applications requiring precise, reliable pressure monitoring.

Frequently Asked Questions

What is the Dwyer 645-0 transmitter used for?

The Dwyer 645-0 differential pressure transmitter is used for industrial process control, filter monitoring, refrigeration, pump flow control, HVAC equipment, and liquid level measurement. It is compatible with gases and liquids and delivers a 4 to 20 mA output proportional to differential pressure.

What are the specifications of the Dwyer 645-0?

The Dwyer 645-0 has a pressure range of 0 to 1 psid, accuracy of ±0.25% FS, response time of 30 to 50 ms, and a 4 to 20 mA output. It features a 1/4"-18 female NPT connection, IP65 stainless steel/aluminium housing, and operates on 11 to 30 VDC power.

Where to buy the Dwyer 645-0 in Singapore?

You can source the Dwyer 645-0 transmitter in Singapore through 3G Electric. We supply this Dwyer instrument and handle logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on this model.

How to install the Dwyer 645-0 transmitter?

Install the Dwyer 645-0 by connecting the 1/4"-18 female NPT ports to high and low pressure lines, ensuring both sides are properly bled using the bleed screws. Use the optional 3-valve manifold for easier maintenance. Wire the 4 to 20 mA loop to the terminal block with 11 to 30 VDC supply.

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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