About Dwyer MS 721 Magnesense Differential Pressure Transmitter
Dwyer Instruments MS-721
Magnesense Differential Press. Trans.,5 VDC,.1,.25,.5 in H2O
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
5V output
selectable range 0.1, 0.25, 0.5 in H2O (25, 50, 100 Pa)
panel mount
Unmatched Accuracy and ReliabilityEngineered for industrial use, the MS 721 delivers accuracy within 1% of full scale, ensuring dependable performance in sensitive applications such as cleanrooms and HVAC systems. The push-button zero and span adjustment simplifies calibration, while the electro-mechanical processing ensures long-term stability. With protection rating IP65 and robust materials like polycarbonate and stainless steel, this device is optimized for demanding environments.
Comprehensive Installation FlexibilityThe MS 721 features two 1/8" NPT female ports for easy connection, a terminal block for electrical wiring, and supports wall or duct mounting. Its compact design (82 mm diameter x 36 mm depth) fits seamlessly into tight spaces, while the vertical mounting orientation is recommended for optimal accuracy. Accessories included, such as the mounting bracket and screws, facilitate rapid and secure setup.
User-Centric Control and AdjustmentWith intuitive push-button zero and span adjustments, the MS 721 simplifies the calibration process, reducing downtime and the need for specialized tools. The optional digital LCD allows real-time monitoring, providing users with immediate feedback for system diagnostics and maintenance. Its smooth polycarbonate finish ensures easy cleaning, meeting hygiene standards in critical areas.
FAQs of Dwyer MS 721 Magnesense Differential Pressure Transmitter:
Q: How do I install the Dwyer MS 721 Magnesense Differential Pressure Transmitter?
A: Installation is straightforward: mount the unit vertically on a wall or duct using the included bracket and screws. Connect the two 1/8" NPT female pressure ports to your process lines, wire the terminal block to your 10-35 VDC power supply, and ensure proper sealing for an IP65-rated enclosure.
Q: What applications is the MS 721 suitable for?
A: The MS 721 is primarily used in HVAC controls, cleanroom monitoring, filter status tracking, and building automation systems where accurate air or compatible gas pressure measurement is essential.
Q: When should I calibrate the transmitter, and how is it done?
A: Calibration is recommended during installation and as part of routine maintenance, depending on operational conditions. Zero and span adjustments are easily performed with accessible push-buttons, streamlining the calibration process without specialized equipment.
Q: Where can I find the output signal and electrical connection details?
A: The transmitter provides a 4-20 mA (2-wire) output, accessible via the integrated terminal block. For detailed wiring and configuration, refer to the included manual.
Q: What are the benefits of using the MS 721 Magnesense model?
A: Key benefits include industry-leading accuracy, fast response time (<250 ms), robust IP65 protection, simple calibration via push-buttons, optional digital LCD display, and compatibility with a wide pressure range and various non-combustible gases.
Q: Can this transmitter be used outdoors or in humid environments?
A: Yes, the IP65-rated enclosure protects against dust and water jets, while the polycarbonate housing and silicone seals provide durability. It operates reliably in 0-95% RH (non-condensing) and temperatures from -10 to 60C, making it suitable for most indoor and some outdoor applications.
Q: Is the MS 721 compatible with aggressive or liquid media?
A: This transmitter is specifically designed for measuring differential pressure in air and compatible non-combustible gases. It is not suitable for aggressive liquids or highly corrosive gases.