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PRODUCT CATEGORIES:

Pressure Transducers

A pressure transducer, also known as a pressure sensor, is a device that converts pressure into an electrical signal. At its most basic, the transducer measures force applied by a fluid (such as a gas or liquid) and then transmits data or uses the resulting information to regulate the pressure.

Typically, a pressure transducer consists of two main parts: a pressure sensitive element (transducer) and a signal conditioning electronics. The pressure sensitive element can be made from different materials and based on different technologies like piezo-resistive, capacitive, electromagnetic, etc. One common type is the piezo-resistive strain gauge.

When pressure is exerted on this element, it results in a physical change within the sensor. This change could be a deformation or strain, which is then converted into an electrical signal by the transducer.

The signal conditioning electronics then interpret this signal and convert it into a readable output, often in the form of a current or voltage. The readings can then be displayed, recorded, or used to control other devices. 

Pressure transducers are widely used in various fields like aerospace, automotive, HVAC systems, medical devices, and industrial controls for monitoring and controlling systems. They play a critical role in maintaining safety, efficiency, and performance standards across a range of applications.

Our range of pressure transducers is based on the Titan Series using either a ceramic piezo-resistive or stainless-steel oil filled piezo-resistive silicon sensor.

How do Pressure Transducers Work?

A pressure transducer typically consists of two main components:

  1. Pressure Sensing Element (Sensor):

    • This is the part that physically interacts with the pressure medium (gas or liquid). Common sensing elements include diaphragms, bourdon tubes, or bellows, which deform under pressure.

  2. Transduction Mechanism:

    • Converts the mechanical deformation of the sensing element into an electrical signal. Methods include strain gauges, piezoelectric materials, capacitive sensors, or inductive elements.

Process Overview:

  • Pressure Application: The medium exerts pressure on the sensing element.
  • Mechanical Deformation: The sensing element deforms proportionally to the pressure.
  • Signal Conversion: The transduction mechanism converts this deformation into an electrical signal (voltage, current, or resistance change).
  • Signal Output: The electrical signal is outputted for measurement, display, or control purposes.

Types of Pressure Transducers

  • Strain Gauge Pressure Transducers:

    • Utilize strain gauges bonded to the sensing element.
    • As the element deforms, the strain gauges change resistance.
    • Commonly used due to their accuracy and robustness.

  • Capacitive Pressure Transducers:

    • Measure changes in capacitance caused by the movement of a diaphragm between two capacitor plates.
    • Offer high sensitivity and are effective for low-pressure measurements.

  • Piezoelectric Pressure Transducers:

    • Use piezoelectric materials that generate an electrical charge under mechanical stress.
    • Ideal for measuring dynamic pressures, such as vibrations or rapid changes.

  • Inductive and LVDT (Linear Variable Differential Transformer) Transducers:

    • Measure changes in inductance caused by the movement of a magnetic core within a coil.
    • Suitable for harsh environments.

  • Resonant Pressure Transducers:

    • Use the principle of resonance frequency changes under pressure.
    • Provide high accuracy and stability over time.

  • Optical Pressure Transducers:

    • Employ fiber optics and detect changes in light transmission due to pressure-induced deformation.
    • Immune to electromagnetic interference and suitable for hazardous environments.

Key Features & Specifications

  • Pressure Range:

    • Defined by the minimum and maximum pressures the transducer can accurately measure.
    • Available for vacuum pressures up to thousands of psi (pounds per square inch).

  • Accuracy and Precision:

    • Accuracy: The degree to which the measured value conforms to the true value.
    • Precision: The ability to produce the same measurement under unchanged conditions.
    • Specified as a percentage of the full-scale output.

  • Output Signal Types:

    • Analog Outputs: Voltage (e.g., 0-5V, 0-10V), current (e.g., 4-20 mA).
    • Digital Outputs: Use protocols like I²C, SPI, or CAN bus for direct digital communication.

  • Temperature Compensation:

    • Ensures accuracy across a range of operating temperatures.
    • Important because temperature fluctuations can affect sensor readings.

  • Environmental Protection:

    • Ingress Protection (IP) Rating: Indicates resistance to dust and water (e.g., IP65, IP68).
    • Material Compatibility: Wetted materials must be compatible with the pressure medium to prevent corrosion or degradation.

  • Response Time:

    • The speed at which the transducer can respond to changes in pressure.
    • Critical for applications involving rapid pressure fluctuations.

Pressure Transducer Applications

  1. Industrial Automation and Process Control:

    • Monitoring pressures in pipelines, reactors, and storage tanks.
    • Essential for chemical processing, pharmaceutical manufacturing, and food production.

  2. Automotive Industry:

    • Engine performance monitoring (e.g., fuel injection pressure, oil pressure).
    • Tire pressure monitoring systems (TPMS).

  3. Aerospace and Aviation:

    • Altitude and airspeed measurements.
    • Hydraulic and pneumatic system monitoring.

  4. Medical Equipment:

    • Blood pressure monitoring devices.
    • Respirators and ventilators.

  5. Oil and Gas Industry:

    • Downhole pressure measurement.
    • Monitoring of drilling operations and well integrity.

  6. HVAC Systems:

    • Ensuring optimal operation of heating, ventilation, and air conditioning by monitoring air and refrigerant pressures.

  7. Environmental Monitoring:

    • Atmospheric pressure measurement for weather stations.
    • Water level detection in rivers and reservoirs through hydrostatic pressure.

If you require calibration of our pressure sensors, pressure transmitters or transducers then please contact us for a detailed quote.

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