M Series Pressure Transmitter

M Series Transmitter - Differential Pressure Transmitters


Featuring Type 4 Certification 


The M Series family of differential pressure transmitters measure low pressures and feature a wide variety of analog signal outputs with low power consumption. A wide selection of standard pressure ranges and electrical ratings is available. These transmitters feature: no moving parts to wear out, reliable long term stability, and are virtually position insensitive. 


Series M transmitters are typically used for monitoring cleanroom pressures, HVAC, velocity pressures, bubbler level systems, and leak detection; as well as filter differential, draft, fume hood and other low pressure applications.


The transmitters are housed in a compact heavy duty gasketted cast aluminum enclosure designed to IP 65 of IEC 529 standards and NEMA 4. The die cast aluminum enclosure incorporates a recessed neoprene gasket to prevent ingress of moisture or dust. Wall mounting holes are enclosed in the cast aluminum box and concealed by the cover. The wall mounting holes and the cover attaching screws are outside the gasketted area. Access to the terminals are made through knockouts on the front of the box. A choice of one or two knockouts and three hole sizes is available to accommodate usage of 1/2 inch conduit and metric sizes PG11 and PG13. Pluggable terminal block connectors are provided with captive wire protection and captive terminal screws.


The Series M includes four models: Model M10, Model M20, Model M30 and Model M40. These four models incorporate a variety of power and signal options. The span or zero adjustment is performed with a 20 turn potentiometer for fine resolution. The M Series transmitters have been tested by an accredited laboratory and comply with the European requirements of Council Directive 89/336/EEC for emission measurements per EN50 081-1 and immunity tests per EN50082-1.

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M Series Transmitter Specifications

  • ±1% Accuracy, Full-Span
  • Long Term Stability
  • Rugged NEMA 4/IP 65 Rated Aluminum Enclosure
  • 0-5V, 0-10V and 4-20 mA Outputs
  • DC & 24, 120, 240 VAC Power Inputs
  • Reverse Polarity Protected
  • NIST Traceable Calibration
  • CE Approved
  • Clean Room Pressure Monitoring
  • HVAC Process and Automation
  • Velocity Measurement
  • Filter and Fume Hood Differential Pressure
  • Leak Detection


Accuracy ±1% of Span (including non-linearity and hysteresis)
Calibration Traceable to National Institute of Standards and Technologoy (NIST)


Operating Temperature Range 32°F to 115°F (0°C to 45°C)
Storage Temperature -20°F to 160°F (-30°C to 70°C)
Effect of Temperature on Zero ±0.05%/°C
Effect of Temperature on Span ±0.02%/°C
Operating Humidity Range 10% to 90% RH, non-condensing
Shock Resistance 10 G (11 ms)
Vibration Resistance 5 G to 50 Hz

Electrical Connectors

(Polarized Euro-plug/connectors.)
Connections Pluggable terminal block for wire, 14 to 26 AWG
Material Glass filled polyester


Dimensions 3.56 in x 4.54 in x 2.18 in (90 mm x 115 mm x 55 mm)
Material Aluminum alloy #A380

M Series Transmitter - Differential Pressure Transmitters Physical Diagram

Cover Screws M4 stainless steel, non-magnetic
Finish Black epoxy paint
Knockout Choice of 2 holes. Knockout hole sizes 1/2 in (12.70 mm) conduit, PG11 or PG13. Cable glands not included.
Pressure Port Connection 3/16 in (4.57 mm) diameter
Suitable for:
1/8 in (3.04 mm) ID Tygon™ or polyurethane tubing 0.11 in to 0.15 in (3 mm to 4 mm)
1/4 in (6.35 mm) OD polyethylene tubing 0.23 in (6 mm)
Weight 1.27 lb (576 g) maximum
Integral filters at both ports. Measures differential, gage
pressure or vacuum. Suitable for air or inert gases.

M Series Transmitter - Differential Pressure Transmitters Pressure Chart

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Modus Series M Differential Pressure Transmitters Modus Series M Differential Pressure Transmitters Modus Series M Differential Pressure Transmitters Modus Series M Differential Pressure Transmitters