1. Althen Sensors
  2. Sensors
  3. Pressure sensors
  4. Hygienic and process pressure sensors
  5. MDM7000-DP Smart differential pressure transmitter

MDM7000-DP Smart differential pressure transmitter

High-accuracy smart differential pressure transmitter designed for demanding industrial and hazardous environments. With a wide measuring range, robust environmental resistance, and multiple certification options, it delivers reliable performance for critical pressure monitoring applications.


Key features

  • High accuracy and stability (delivers up to ±0.05% URL accuracy with long-term stability of ±0.2% span over 10 years)
  • Robust environmental performance. Operates in extreme conditions with IP67 protection, -50°C to +85°C temperature range
  • Versatile and certified design. Supports HART and optional Bluetooth communication.

About the MDM7000-DP Smart differential pressure transmitter

The MDM7000-DP is a high-precision, smart differential pressure transmitter designed for demanding industrial environments. With a wide measuring range from 20 mbar to 100 bar, it offers exceptional accuracy up to ±0.05% URL, a 100:1 turndown ratio, and long-term stability of ±0.2% span over 10 years. It features HART communication, optional Bluetooth, and is suitable for harsh environments with IP67 protection, broad temperature tolerance, and multiple hazardous area certifications (ATEX, IECEx, CSA, etc.).

Features

  • High accuracy & stability: delivers up to ±0.05% URL accuracy with long-term stability of ±0.2% span over 10 years, ensuring precise and reliable measurements.
  • Robust environmental performance: operates in extreme conditions with IP67 protection, -50°C to +85°C temperature range, and multiple fill fluid options for aggressive or cold media.
  • Versatile and certified design: supports HART and optional Bluetooth communication, wide range turndown (100:1), and global hazardous area certifications including ATEX, IECEx, and CSA.

Environmental conditions

The MDM7000-DP is built to operate reliably in harsh and variable industrial environments:

  • Operating temperature: without LCD: -50°C to +85°C. With LCD: -40°C to +70°C.
  • Storage temperature: up to +100°C, depending on configuration.
  • Sensor operating temperature: -40°C to +105°C.
  • Medium temperature: silicone oil: -40°C to +200°C,  low-temp silicone oil: -55°C to +200°C, fluorocarbon oils: up to +110°C, or -55°C to +85°C for special media.
  • Humidity: 5% to 100% RH @ 40°C.
  • Ingress protection: IP67 – dust-tight and water-resistant.
  • EMC compliance: tested against IEC standards for immunity to electrostatic discharge, RF fields, power surges, and conducted disturbances.

These specs make the MDM7000-DP suitable for extreme climates, outdoor installations, and areas exposed to vibration, humidity, and aggressive media.

Typical Applications

The MDM7000-DP’s wide range, high accuracy, and robust certifications make it ideal for numerous critical industrial applications, including:

  • Oil & gas: flow, level, and pressure differential monitoring in pipelines, separators, and gas treatment plants.
  • Chemical & petrochemical: differential pressure measurement across filters, pumps, and reactors, including corrosive media options with Hastelloy or Tantalum diaphragms.
  • Power & energy: steam flow and boiler pressure management under high static pressures (up to 420 bar).
  • Marine & offshore: class-certified for CCS, DNV, ABS, LR, and others, ideal for ballast, engine room, or tank level applications.
  • Water & wastewater: monitoring pressure differences across membranes and filters in treatment facilities.
  • Pharmaceutical & food: precise and hygienic differential pressure measurement, compatible with clean process environments when configured accordingly.

Thanks to features like a smart HART interface, optional Bluetooth, square root output, and a variety of mounting brackets and adapters, the MDM7000-DP is a flexible and powerful tool for process control, asset monitoring, and system optimization in both hazardous and non-hazardous areas.

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Technical Specifications

Specification Value
Accuracy ±0.05% ① , ±0.075%URL. ① The accuracy is dependent on the range.
Range 20mbar~100bar, see the specifications for details
Turn down ratio 100:1
Long-term stability ±0.2% Span/10 years
Ambient temperature effects At 60mbar, the total effect per 10℃ is (0.1+0.05TD)% SPAN; For other ranges: total effect per 10℃ : (0.075+0.0375TD)% SPAN
Voltage effects When the power supply voltage changes within 18.3V~44V DC, its zero point and range change should not exceed ±0.005% SPAN/V
Mounting position effects Less than 4mbar at any position, which can be corrected by PV(primary value)=0 reset
Vibration effects < 0.1% SPAN as per GB/T18271.3/IEC61298-3
Output signal 4mA~20mA DC, HART
IP rating IP67
Weight About : 4kg (without mounting bracket and process connection accessories)

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