Differential pressure sensors

Differential pressure sensors are invaluable in applications where understanding the pressure difference between two points is more critical than knowing the absolute pressure. Their ability to provide precise, reliable measurements in various industrial processes — from flow measurement to leak detection — makes them essential tools in maintaining system efficiency and safety. Their independence from atmospheric pressure also enhances their versatility and reliability in diverse environments.

Pressure sensors – DLHR Series

  • Pressure ranges from 0.5 inH2O to 60 inH2O
  • Low and variable supply voltage from 1.68V to 3.6V
  • Dual-Die Reference technology

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Pressure sensors – MLV Series

  • 1 inH2O to 150 psi pressure ranges
  • Excellent position sensitivity
  • 5V supply voltage

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Pressure sensors – ELVX Series

  • Pressure ranges from ±0.5 to ±60 inH2O
  • 3.3V or 5V supply voltage
  • PCB surface mount

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Pressure sensors – BLV Series

  • Pressure ranges from 1 to 30 inH2O
  • 0.9V to 1.8V supply voltage
  • 0.3% linearity

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Pressure sensors – BLVR Series

  • 1 to 30 inH2O pressure ranges
  • 1.8V to 3.3V supply voltage
  • Dual-Die Reference technology

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Pressure sensors – ELVR Series

  • Pressure ranges from 1 inH2O to 30 inH2O
  • Supply voltage of 3V and 5V
  • Digital I2C or SPI interface and analog output

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Pressure sensors – ELVA Series

  • 100 mbar to 10 bar pressure ranges
  • 3V or 5V supply voltage options
  • Analog output

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Pressure sensors – ELVE Series

  • Pressure ranges from 100mbar to 10 bar
  • 3V or 5V supply voltage options
  • Digital SPI output

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Pressure sensors – ELVH Series

  • Pressure ranges from ±0.5 inH2O to 60 psi
  • 3.3V or 5V supply voltage options
  • Digital I2C or SPI interface or analog only options

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Differential pressure sensors – high-quality and customised products

In some cases, it is not essential to know the absolute pressure of a liquid or gas. Instead, only the difference between two points in the system being monitored needs to be known. In such instances, differential pressure sensors can be utilised. All Sensors specialises in pressure sensors and offers you customised products for your project. With us, you can expect experts with many years of experience and the best possible expertise. We prioritise customer service and ensure that you find the ideal product for your individual requirements.

Your benefits with differential pressure sensors from All Sensors

  • Highest accuracy at low pressures, reliable MEMS pressure sensors
  • Many years of experience in the development and production of differential pressure sensors
  • Innovative CoBeam²™ technology and Dual-Die Technology
  • Optimised solutions for mobile applications with low energy consumption, insensitive to changes in position and acceleration
  • Standard solutions based on modular product platforms
  • Customised product adaptations
  • Personalised system solutions for optimum integration of measurement technology in demanding applications

How differential pressure sensors work

A differential pressure sensor is an instrument used to measure the pressure difference between two different points in a system. It is frequently used in various applications, e.g. in ventilation and air conditioning technology, in the process industry, in building automation and in medical technology.

A differential pressure sensor works according to the diaphragm principle. It has two hermetically sealed chambers, each with a process connection, separated from each other by a flexible membrane with a bonded resistance bridge. The process connections are positioned in front of and behind a potential pressure reduction, allowing the pressures to act on the membrane in an opposing direction. Provided that the pressure within the chambers remains consistent, the membrane will retain its flat configuration. When the pressure in one of the chambers is subject to a change, the membrane tilts towards the chamber with the lower pressure. This deformation is converted into an electrical voltage or current and can then be read by a digital display or computer system.

Types of differential pressure sensors

With a differential pressure sensor, a distinction is made between piezoresistive and capacitive measurement.

Piezoresistive differential pressure sensor

In a differential pressure sensor of this type measures the difference in pressure between two points using the piezoresistive effect. The change in resistance is directly proportional to the strain caused by pressure on the diaphragm.

Capacitive differential pressure sensor

Capacitive differential pressure sensors are equipped with a capacitor integrated in a silicon chip. This allows conclusions to be drawn about the resulting pressure difference based on changes in the device’s capacity.

fluid in pipes being controlled by differential pressure sensor

Differential pressure sensors – areas of application

Differential pressure sensors are used in a variety of applications, from industrial processes to everyday appliances. Some common applications are:

  • Heating, ventilation and air conditioning (HVAC) systems: Differential pressure sensors are used in HVAC systems to monitor the air flow and optimise the efficiency of ventilation.
  • Filter monitoring: In many industrial applications, differential pressure sensors are used to monitor the condition of filters. An increase in the pressure difference across a filter can indicate a blockage and the need for cleaning or replacement.
  • Fluid monitoring: Differential pressure sensors are used in medical technology and laboratory applications to monitor and control the pressure in liquid or gas lines.

 

The perfect differential pressure sensor for your project – let us advice you

At All Sensors you can expect real people with real service, personalised and individual for you. We will advise you in detail and work with you to find out which differential pressure sensor is best suited to your project. But even after your purchase, we will remain your reliable contact and will be on hand with help and advice. We are also happy to help you with the customised development of a differential pressure sensor. Our experts in sensor technology look forward to hearing from you and your project! Contact us now.

High-precision
sensors

Highest precision for lowest pressures, reliable MEMS pressure sensors.

Innovative
technologies

Innovative CoBeam²™ technology and dual die technology.

Customised
system solutions

Individual system solutions for perfect integration of measurement technology in sophisticated applications.

Comprehensive
product range

Standard solutions on a modular product platform.