Dwyer MS2 Differential Pressure Sensor (Discontinued

Dwyer MS2 Differential Pressure Sensor (Discontinued – Replaced by MSX)

Posted on: 23/06/2025

The Dwyer MS2 differential pressure transmitter is discontinued and replaced by the MSX Series. Ideal for HVAC, cleanrooms, and building automation. DLK offers full replacement support.

Dwyer Series MS2 Differential Pressure Transmitter (Discontinued)

Replacement model: Dwyer Magnesense® Series MSX

Overview

The Dwyer Series MS2 differential pressure transmitter was widely used in HVAC systems, cleanrooms, and building automation applications. Known for its compact size, reliable performance, and flexible configuration options, the MS2 became a popular choice for monitoring air pressure differentials in commercial and industrial environments.

However, Dwyer Instruments has officially discontinued the MS2 series. The recommended replacement is the Series MSX, part of the Magnesense® line, which offers upgraded features and enhanced compatibility with modern control systems.

Note: This article serves as a reference for existing MS2 users seeking technical information or guidance on selecting a suitable replacement.

Key Technical Specifications of MS2

Specification	Value
Pressure range	±0.1 to ±25 in w.c.
Accuracy	±1% full scale (FS)
Output signal	0-10 VDC or 4-20 mA
Power supply	16-30 VDC or VAC
Communication option	Modbus RTU (select models)
Configuration	DIP switches (range, unit, response time, zero/span)
Housing material	ABS plastic
Mounting	Surface or DIN rail

Typical Applications

Monitoring pressure differentials in cleanrooms and isolation rooms.
Measuring pressure drop across fans, air filters, or ductwork in HVAC systems.
Integration into BMS or SCADA systems via analog or Modbus output.

Why was MS2 replaced by MSX?

The MSX Series is the direct successor to the MS2, developed to meet increasing industry demands for improved accuracy, digital integration, and simplified setup.

Improvements of the MSX over the MS2: