Field Instruments

Product Overview

The DXW-11-153-4 is a wet/wet differential pressure switch from Dwyer’s “Series DX.” It provides a reliable contact output based on the difference between two pressure sources. With a robust, weatherproof enclosure and brass/fluoroelastomer wetted parts, this switch is suitable for a wide range of industrial applications involving gases or water-based fluids. It is designed for environments that may be exposed to moisture, dust, or wash-down conditions — making it ideal for HVAC systems, filter differential monitoring, pump flow verification, and general process control.

Key Features

• Detects and responds to differential pressure between two inputs (wet/wet) rather than only single-side pressure — useful for flow proofing, filter monitoring, or pressure loss detection.

• Adjustable set-point, allowing custom differential thresholds to trigger the switch.

• SPDT snap-switch output, selectable for normally-open or normally-closed operation, enabling flexible integration into control or alarm circuits.

• Weather-proof enclosure rated NEMA 4X / IP65, suitable for dusty, wet, or wash-down environments.

• Brass body and fluoroelastomer diaphragm — compatible with most gases and water-based solutions.

• Compact build with ¼″ NPT female connections — suitable for standard piping and instrumentation.

• Externally adjustable set point and removable terminal block for easy installation and maintenance.

• High static pressure rating — capable of withstanding pressures up to 200 psig (≈ 13.8 bar) on either side.

Technical Specifications

Brand: Dwyer
Model / Part Number: DXW-11-153-4
Type: Wet/Wet Differential Pressure Switch

Pressure Measurement Type: Differential (between two inputs)
Process Connections: ¼″ NPT female (two ports)
Wetted Materials: Brass (body), Fluoroelastomer (diaphragm/sealing)
Switch Output: SPDT snap switch — selectable NO/NC
Electrical Rating:

• 5 A @ 125/250 VAC (AC)

• 5 A resistive @ 30 VDC (DC)

Set-Point Range (Differential): 50–75 psi (≈ 3.5–5.2 bar) for this variant
Static Pressure Limit: Up to 200 psig on either port (13.8 bar)
Enclosure Rating: NEMA 4X / IP65 — weatherproof / dust-tight / wash-down safe
Set-Point Adjustment: External screw adjustment
Terminal Connection: Removable terminal block (for easier wiring and maintenance)
Ambient / Service Temperature Range: Suitable for standard industrial gases and water-based fluids (check specific media compatibility depending on use)
Switch Repeatability: ±2% of full range (typical)

Applications & Use Cases

• Differential pressure monitoring across filters — to detect filter clogging or pressure drop

• Flow verification or “proof-of-flow” monitoring in HVAC, pump, or process systems

• Monitoring differential pressure across heat exchangers, chillers, or air conditioning systems

• Pump or fan protection — detecting loss of flow or abnormal pressure drops

• General industrial process control where two-side pressure comparison (wet/wet) is required

• Use in industrial, commercial, or outdoor installations — thanks to robust, weather-resistant enclosure

Why Buy from FieldInstruments.lk

• We supply 100% genuine Dwyer differential pressure switches — ensuring factory-standard quality and reliability.

• Fast and dependable delivery across Sri Lanka — suitable for plant, industrial, and remote-site installations.

• Competitive and transparent pricing — suitable for both single-unit orders and bulk procurement.

• Local support for installation, application guidance, and after-sales assistance — we help you choose the right variant for your system.

• Trusted supplier for industrial instrumentation, process control, HVAC, and fluid-handling projects.

Fieldinstruments.lk
50/3, Angampitiya Rd, Ethul Kotte, Sri Lanka. 10100.
Phone: +94718555888 Email: info@fieldinstruments.lk