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Group Four Transducers Inc
Pressure Transducers

Pressure Transducers

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Group Four is a full service measurement solution house, and that includes pressure measurement and pressure sensor solutions. Group Four can help you define the best and most efficient solution for your need from a wide range of pressure sensor products.

Our application engineers look forward to speaking with you about your project needs. We have provided examples of some of our baseline products here, and offer some guidelines below that will help us determine which type of pressure solution may be a fit for you. Please review the information below and contact our engineers to describe your needs!

Questions: Contact Group Four Engineering

G4 G200-S Piezoresistive Pressure Transducers


G4 Piezoresistive Series Pressure Transducers with isolated stainless steel diaphragm.
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G300 Strain Gage Pressure Sensor


The type G300 is a Strain Gage Pressure Sensor.
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G700 Silicone Differential Pressure Sensor


The type G700 is a Silicone Differential Pressure Sensor with 316 L diaphragm.
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Pressure sensors can be classified in terms of:

  • Pressure ranges measured,
  • Temperature ranges of operation,
  • The type of pressure they measure.

Pressure sensors are further defined according to their purpose:

  • Absolute pressure sensor

This sensor measures the pressure relative to perfect vacuum.

  • Gauge pressure sensor

This sensor measures the pressure relative to atmospheric pressure. A tire pressure gauge is an example of gauge pressure measurement; when it indicates zero, then the pressure it is measuring is the same as the ambient pressure.

  • Vacuum pressure sensor

Often described as a sensor that measures pressures below atmospheric pressure, showing the difference between that low pressure and atmospheric pressure (i.e. negative gauge pressure), but it may also be used to describe a sensor that measures low pressure relative to perfect vacuum (i.e. absolute pressure).

  • Differential pressure sensor

This sensor measures the difference between two pressures, one connected to each side of the sensor. Differential pressure sensors are used to measure many properties, such as pressure drops across oil filters or air filters, fluid levels (by comparing the pressure above and below the liquid) or flow rates (by measuring the change in pressure across a restriction). Technically speaking, most pressure sensors are really differential pressure sensors; for example a gauge pressure sensor is merely a differential pressure sensor in which one side is open to the ambient atmosphere.

  • Sealed pressure sensor

This sensor is similar to a gauge pressure sensor except that it measures pressure relative to some fixed pressure rather than the ambient atmospheric pressure (which varies according to the location and the weather).

Questions: Contact Group Four Engineering