Dwyer MS 221 Magnesense Differential Pressure Transmitter

About Dwyer MS 221 Magnesense Differential Pressure Transmitter

Dwyer Instruments MS-221

Differential Pressure Xmitter 0.5"H2O,+/-0.0,0.25

The Series MS Magnesense Differential Pressure Transmitter is an extremely versatile transmitter for monitoring pressure and air velocity. This compact package is loaded with features such as: field selectable English or metric ranges, field upgradeable LCD display, adjustable dampening of output signal (with optional display) and the ability to select a square root output for use with Pitot tubes and other similar flow sensors. Along with these features, the magnetic sensing technology provides exceptional long term performance and enables the Magnesense transmitter to be the solution for a myriad of pressure and flow applications. Field Upgradeable LCD. No need to order two separate transmitters. Simply stock a transmitter and display and you can satisfy any customer's requests. Simply remove cover and snap the LCD onto the board. Field Selectable Ranges in metric or English. Lowers stock and inventory requirements. You'll always have the right transmitter for every job. Digital Push Button Zero and Span. Reduces calibration time significantly over other transmitters that utilize potentiometers. Lowers maintenance time and costs. Adjustable Digital Dampening smooths out unstable pressure fluctuations common in air flow applications. Field Selectable Air Velocity Mode for fan and blower applications. Unit provides square root output that accurately tracks fpm or m/s flow rate. No need for a smart programmable indicator or PLC to convert pressure to air flow. Reduces components and installation time lowering overall costs

Product Highlights

0-10 V output

selectable range +/- 0.1", 0.25"

0.5 in H2O. (+/- 25, 50, 100 Pa)

panel mount

Field-Selectable Output for Versatile Applications

With switchable 4-20 mA or 0-10 VDC signal outputs, the MS 221 adapts seamlessly to diverse system requirements. Its adjustable response time and pushbutton calibration ensure accuracy and customizability, making it ideal for industrial ventilation, filter monitoring, or duct pressure measurement. Its electronic sensing design delivers reliable performance for demanding air-handling units and BMS integration.


Rugged Construction Meets Stringent Environments

Encased in an IP65-rated, injection-molded polycarbonate housing, the MS 221 withstands dust, moisture, and harsh weather, suitable for both indoor and outdoor applications. With a wide operating temperature range from -20C to 70C and silicone sealing, it guarantees long-term durability even in challenging conditions.