MDM7000 Smart DP Transmitter for Leak Tightness Tests

Industry Background

In precision manufacturing and chemical processing, leak tightness is a critical factor for both efficiency and safety. Traditional methods such as water immersion tests or mechanical gauges are increasingly being replaced by digital,smart solutions. Among these, smart differential pressure transmitters have become a core technology for leak detection.

As sensor technology advances, the industry is moving toward three key objectives: higher accuracy, automation, and traceability. Today, smart DP transmitters are widely applied in areas such as battery sealing tests for new energy systems, environmental monitoring in sterile pharmaceutical facilities, semiconductor chamber leak testing, and online inspection of gas shut-off valves—redefining safety standards in leak detection.

Industrial Applications

Differential pressure transmitters play a central role in leak tightness testing. By measuring minute pressure differences with high precision, they enable the reliable detection of even the smallest leaks, forming the foundation of modern non-destructive leak testing.

The principle is straightforward: the pressure behavior of a test object is compared with that of a reference part under ideal leak-free conditions. When a leak occurs, a pressure gradient develops across the leak path, and the differential pressure increases in proportion to the leakage rate.

In practice, the test sequence typically follows four stages—pressurization, stabilization, measurement, and venting. Throughout this process, the smart DP transmitter continuously monitors the pressure difference between two chambers. If the measured value exceeds a defined threshold, a leak is confirmed.

Micro Sensor Solutions

Detection of Minute Leaks: Traditional methods such as bubble observation or mechanical gauges face clear limitations in accuracy and efficiency. The MDM7000 Smart DP Transmitter addresses these challenges with a second-generation silicon sensor combined with advanced multi-point temperature and pressure compensation. Supported by a neural network algorithm, it delivers precise measurements even in ultra-low ranges from –100 Pa to +100 Pa, enabling reliable detection of micro leaks in real time and improving test efficiency.

High Reliability: In precision manufacturing, production lines often run 24/7, demanding long-term stability from all measurement devices. The MDM7000 is engineered to minimize zero drift and span drift, preventing false results over extended operation. Its proprietary filtering algorithm eliminates sudden output spikes, ensuring stable performance, reducing downtime, and lowering maintenance requirements.

Compact, Customizable Design: For leak testers with limited installation space, Micro Sensor offers a compact version of the MDM7000. This tailored solution maintains full performance while simplifying integration into small-scale systems.

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Key Features

• Second-generation silicon sensor technology with automated packaging and full temperature/pressure compensation; each unit is delivered with a factory inspection report

• Ultra-low differential pressure range: –100 to +100 Pa

• Certified for global explosion-proof standards, including ATEX, IECEx, CSA, as well as PCEC and NEPSI

• High accuracy: ±0.075% FS

• Multiple housing options: aluminum alloy, 316L stainless steel, low-copper brass

• Modular, dual-chamber design with IP67 for Low maintenance cost

• Maximum static pressure: 42 MPa

• Operating temperature range: –50 °C to +85 °C

• Excellent EMC performance; CE and RoHS compliant

• Wide selection of process and electrical connections for flexible integration

Application Value

The MDM7000 Smart DP Transmitter delivers the accuracy, intelligence, and reliability required in advanced leak testing. From battery safety in new energy applications to nanoscale quality control in semiconductor production, it strengthens both safety and efficiency in demanding industries. Looking ahead, smart differential pressure transmitters will continue to drive leak detection technology toward greater precision, smart, and safety.