Series MS2 Magnesense® II Differential Pressure Transmitter

Magnesense® II Differential Pressure Transmitter
Monitors Pressure, Air Velocity & Air Flow, BACnet/Modbus® Communications

Monitors Pressure, Air Velocity & Air Flow, BACnet/Modbus® Communications

The SERIES MS2 Magnesense® II Differential Pressure Transmitter combines the proven stable Hall Effect sensing technology of our original Series MS with additional features to reduce installation time and simplify ordering. In this second generation transmitter, we have added additional field selectable pressure ranges so that each model can have four selectable ranges along with four additional bidirectional ranges. When using the pluggable integral display or the portable remote display tool, both Metric and English engineering units can be selected via on board dip switches. Dual current and voltage outputs allow users to simultaneously take either a current or voltage output to their building controller and have a local test circuit for verification of the output reading. The voltage output can be selected to be either 0 to 5 VDC or 0 to 10 VDC, while the current is always 4 to 20 mA. Both the current and voltage output can also be inverted. The MS2 can also be ordered with either a BACnet® or MODBUS® Communications protocol output that will allow the transmitters to be daisy-chained together.

Like the original Series MS, the second generation transmitter can be used as a linear pressure output or a linear velocity output with the square root extraction done in the transmitter. Additional parameters have been included to expand the square root capability to include flow measurements. 

BACnet® and Modbus® Communications protocol recommend limiting the number of nodes in any segment to 32. Therefore, the transceiver may be rated at one unit load. Fractional loads are also acceptable. The MS2 accounts as an eighth of a load on the MSTP network.

Product Applications

  • Duct Static Pressure in Commercial Buildings
  • Fan Proving
  • Filter Monitoring in Air Handler Units
  • Building Pressure in Pharmaceutical-Semi-Conductor Clean Rooms
  • Air Velocity/Flow in VAV Systems
More Information
Model Chart
EXAMPLEMS2D101ATSeries MS2-D101-AT Magnesense® Differential Pressure Transmitter, duct mount probe, range 1  + 0.1, 0.15, 0.25, 0.5” w.c.; + 25, 40, 50, 125 Pa; + 2.5, 4, 6, 10 mm w.c., with aluminum tag
SERIESMS2    MS2 Magnesense® Differential Pressure Transmitter
   Duct Mount Probe
DIN Mounting Bracket
Wall Mount
ACCURACY  1  Standard Models 1.0% Accuracy



 Range 1   + 0.1, 0.15, 0.25, 0.5” w.c.; + 25, 40, 50, 125 Pa; + 2.5, 4, 6, 10 mm w.c.

Range 2   + 1.0, 2.0, 3.0, 5.0” w.c.; + 250, 500, 750, 1250  Pa; + 25, 50, 75, 125 mm w.c.

Range 3   +/- 10, 15, 25, 28” w.c.; +/- 2500, 3500, 5000, 6975  Pa; +/-  250, 350, 500, 700 mm w.c.

Range 11 +/-  0.1, 0.15, 0.25, 0.5” w.c.; +/- 25, 40, 50, 125 Pa; +/-  2.5, 4, 6, 10 mm w.c.
Aluminum Tag
Bacnet Communication
Certificate of Calibration
Factory Calibration Certificate
Cable Gland Accessory
Modbus Communication
NIST Traceable Certificate of Calibration
Static Tips
  • Add -LCD to end of model numbers for units with display
    Example: MS2-W101-LCD
  • Add -BC to end of model numbers for BACnet® Communications
    Example: MS2-W101-BC
  • Add -MC to end of model numbers for Modbus® Communications
    Example: MS2-W101-MC
  • Add -NIST to end of model numbers for NIST Traceable Certificate
    Example: MS2-W101-NIST
  • Add -FC to end of model numbers for Factory Calibration Certificate
    Example: MS2-W101-FC
  • Change W to D for Duct Mount Static Probe
    Example: MS2-D101
  • Change W to N for DIN Rail Mounting
    Example: MS2-N101
Supported Baud Rates: 9600, 19200, 38400, 57600, 76800, 115200.
Data Size: 8.
Parity: None.
Stop Bits: 1.
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Typical Accuracy: ±1% FS for 0.15 in w.c. (40 Pa), 0.25 in w.c. (50 Pa), 0.5 in w.c. (100 Pa), 2 in w.c. (500 Pa), 3 in w.c. (750 Pa), 5 in w.c. (1250 Pa), 10 in w.c. (2 kPa), 15 in w.c. (3 kPa), 25 in w.c. (5 kPa), 28 in w.c. (6.975 kPa); ±2% FS for 0.1 in w.c. (25 Pa), 1 in w.c. (250 Pa), and all bi-directional ranges.
Stability: ±1% / year FSO.
Temperature Limits: 0 to 150°F (-18 to 66°C).
Pressure Limits: 1 psi max., operation; 10 psi burst.
Power Requirements: 10 to 35 VDC (2-wire), 17 to 36 VDC or isolated 21.6 to 33 VAC (3-wire).
Output Signals: 4 to 20 mA (2-wire), 0 to 5 VDC, 0 to 10 VDC (3-wire).
Response Time: Adjustable: 0.5 to 15 sec. time constant. Provides a 95% response time of 1.5 to 45 seconds.
Zero & Span Adjustments: Digital push buttons.
Loop Resistance: Current Output: 0 to 1250 Ω max;
Voltage Output: Min. load resistance 1 kΩ.
Current Consumption: 40 mA max.
Display (Optional): 5 digit LCD.
Electrical Connections: 3-wire removable European style terminal block for 16 to 22 AWG.
Electrical Entry: 1/2" NPS thread.
Process Connection: 3/16" ID tubing (5 mm ID); Max. OD 9 mm.
Enclosure Rating: IP66.
Mounting Orientation: Diaphragm in vertical position.
Weight: 8.0 oz (230 g).
Agency Approvals: BTL, CE.
  • Field selectable ranges and output signal reduce inventory and the chances of ordering an incorrect part
  • BACnet® or Modbus® serial communications reduce wiring cost by daisy-chaining the transmitters
  • Our integral field-upgradeable display or plug-in remote display tool save upfront material cost and allow for local viewing of measurements