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3G Electric
Dwyer Transmitter 645-4 - Measurement
DwyerMeasurement

Dwyer Transmitter 645-4

The Dwyer 645-4 is a pressure transmitter for industrial process monitoring, offering ±0.25% accuracy and IP65 rating. It handles 0–25 psid with 1/4 inch NPT female connection and 30–50 ms response time, fitting…

SKU 3G-CBM-02202

Brand
Dwyer
Item
Transmitter 645-4
Category
Measurement
UNSPSC
41112412 — Pressure gauge
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Technical specs
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Local availability & support

Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Dwyer
housing
stainless steel/aluminium
accuracy
±0.25%
ip rating
IP65
connection
1/4 inch NPT female
pressure kpa
0-1.72
response time
30-50 ms
pressure range
0-25 psid
loop resistance
0-1000Ω

Technical Documents

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

Product Description

The Dwyer 645-4 is a pressure transmitter for industrial process monitoring, offering ±0.25% accuracy and IP65 rating. It handles 0–25 psid with 1/4 inch NPT female connection and 30–50 ms response time, fitting pneumatic and hydraulic control systems.

Frequently Asked Questions

What is the lead time for the Dwyer 645-4?

Lead time on request. 3G Electric sources the Dwyer 645-4 to order and arranges worldwide delivery, including customs documentation and freight coordination. Email or call for a specific delivery estimate.

What pressure range and accuracy does the Dwyer 645-4 offer?

The Dwyer 645-4 handles 0–25 psid (0–1.72 kPa) with ±0.25% accuracy. It features a 1/4 inch NPT female connection, IP65 rating, stainless steel/aluminium housing, and 30–50 ms response time for pneumatic and hydraulic systems.

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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