MDM291 Differential pressure sensor

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Key features

• Fully welded 316L stainless steel construction without O-rings
• High static pressure resistance up to 20 MPa
• Temperature-compensated, fast and stable measurement

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About the MDM291 Welded differential pressure sensor module

The MDM291 is a robust, fully welded OEM differential pressure sensor, designed for reliable differential pressure measurement in gas and liquid systems under challenging process conditions. Its compact form factor, fully stainless steel (316L) construction, and O-ring-free design make it ideal for use with conductive, aggressive, or contaminated media.

With a pressure range from 0…35 kPa up to 2 MPa, a long-term stability of ±0.5% FS/year, and a static pressure tolerance up to 20 MPa, the MDM291 delivers consistent accuracy in both dynamic and steady-state processes. It’s available with multiple threaded connections (G1/4, G1/2, M20x1.5) and produces a typical bridge output of 70 mV, making it ideal for OEM and calibration applications.

Thanks to its temperature-compensated output (0 °C to 70 °C), it maintains measurement stability under fluctuating environmental conditions. With a fast response time of <1 ms and excellent repeatability (±0.05% FS), the MDM291 is perfectly suited for time-critical or high-precision applications.

Technical specifications

• Pressure range: 0…35 kPa to 2 MPa
• Output signal: Typical 70 mV (bridge signal)
• Accuracy: ±0.25% FS (BFSL)
• Repeatability: ±0.05% FS
• Power supply: ≤2.0 mA DC
• Material: Stainless steel 316L (housing & diaphragm)
• Connections: G1/4, G1/2, M20×1.5 (optional)
• Electrical connection: 100 mm silicone wires
• Compensated temperature range: 0 °C to 70 °C

Environmental Conditions

• Operating temperature: -40 °C to +125 °C
• Storage temperature: -40 °C to +125 °C
• Vibration: 10g RMS (20–2000 Hz)
• Shock resistance: 100g, 11 ms
• Insulation resistance: ≥100 MΩ @ 100V DC
• Media compatibility: Liquids and gases compatible with 316L stainless steel

Typical Applications

• Industrial process control
• Differential pressure measurement in gas or liquid systems
• Venturi and vortex flow meters
• HVAC pressure monitoring
• Precision pressure calibrators
• OEM integration in hydraulic and filtration systems

This sensor combines precision, durability and ease of integration - making it the ideal choice for system builders, R&D engineers and manufacturers of industrial measurement equipment. With flexible connection options, a compact footprint and proven performance, the MDM291 is the OEM differential pressure sensor for your critical application.

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