MS-311-LCD

Overview

The Dwyer Instruments MS-311-LCD is a Magnesense® differential pressure transmitter designed for building automation and HVAC applications. It features an integrated LCD display and provides a 0-10 VDC output signal. The device supports multiple measurement ranges, including 1, 2, and 5 inches water column (w.c.), as well as 250, 500, and 1250 Pascals (Pa). Accuracy is specified at ±1% for the 1, 2, and 5 w.c. ranges and ±2% for the 1000 Pa and 500 Pa ranges under standard conditions. It operates on 17-36 VDC or isolated 21.6-33 VAC power.

Feature Summary

• Features a rotatable LCD display for clear local reading of pressure values.
• Utilizes Magnesense® technology for stable and reliable differential pressure measurement.
• Includes field-adjustable zero and span calibration via digital buttons.
• Constructed with a UL94 V-0 rated flame-retardant housing for safety.

Applications

• Filter status monitoring in air handling units.
• Indoor pressure monitoring in pharmaceutical and semiconductor cleanrooms.
• Static pressure measurement in commercial building ductwork.
• Variable air volume system velocity/airflow monitoring when paired with MAFS sensors.

Procurement Notes

Verify that the specific order suffix matches the required output signal type, as the base model designation may vary by configuration. Confirm the desired pressure range selection during procurement, as factory configuration options are available to simplify ordering. Ensure the power supply voltage aligns with the unit's supported input specifications before installation.

Selection Notes

Select this model when a visual local indication of differential pressure is required alongside a 0-10 VDC control signal. It is suitable for applications involving clean gases and non-combustible media. Consider the MSX series variants if current output signals or different mounting configurations are preferred over the wall-mount design of the MS-311.

Part Context

This component belongs to the Dwyer MSX series of Magnesense® differential pressure transmitters. It succeeds the MS2 series, maintaining stability while simplifying the ordering process through factory customization. The series is engineered for integration into modern building automation systems requiring precise environmental monitoring.

FAQ

What is the maximum response time for the MS-311-LCD?

The device offers a continuous field-adjustable response time ranging from 1.5 to 45 seconds, achieving 95% of the final value within this window.

Can the MS-311-LCD measure airflow directly?

The transmitter measures differential pressure linearly. To obtain airflow measurements, it must be used in conjunction with a Magnehelic Air Flow Sensor (MAFS).