Pressure Sensors

Pressure sensors and transducers are devices that sense the applied pressure of gases or liquids. The output of the measurement is then converted into an electrical signal which reflects the amount of pressure applied. You can find out more on our useful pressure sensors guide.

Inside analogue or digital pressure sensors, there are various types of sensor technologies. Depending on the measurement requirements, this can influence their sensing accuracy and reliability. The mechanical displacement within the sensor is turned into an electrical output signal which is achieved with 5 different methods.

• Resistive Sensors - These types of sensors use the change in electrical resistance of a strain gauge connected to the diaphragm.
• Capacitive Sensors - Are highly sensitive and are able to measure low pressure under 10 bar while still withstanding large overloads.
• Piezoelectric Sensors - These sensors use substances like Quartz to generate a charge on the surface when pressure is applied. Piezoelectric pressure sensors are ideal for measuring fast changing pressures.
• Optical Sensors - These use interferometry to measure pressure changes in optical fibre. They are not disturbed by EMI and can be used in noisy or medical environments.
• MEMS – Short for micro-electro-mechanical system and contains capacitive or piezo pressure sensing mechanisms on silicon at micron level resolution.

Types of Pressure Sensors

There are various properties which can be used to classify the type of sensor it is and its appropriate application, including; what pressure range they measure, their operating temperature range or the pressure type they measure.

Absolute Pressure Sensor

This type of sensor measures pressure relative to the perfect vacuum (zero reference point).

Gauge Pressure Sensors

These are often used to measure atmospheric pressure and are sometimes referred to as relative pressure sensors.

Sealed Gauge Pressure Sensors

Similar to gauge pressure sensors except they measure pressure relative to a fixed pressure, not the current ambient atmospheric pressure which can vary.

Differential Pressure Sensors

These can be used to measure the difference between two different pressures (differential pressure) which can be connected to either side of the sensor. They are often used to measure pressure drops, fluid levels and flow rates.

Pressure Sensor Applications

Pressure sensors and transducers play a crucial role in numerous industries, providing essential data for monitoring, control, and safety systems. Their versatility and wide range of measurement capabilities make them indispensable tools in diverse applications across NZ.

Industrial Applications:

• Manufacturing: Monitor and control pressure in various processes, ensuring optimal production efficiency and product quality.
• Oil and Gas: Measure air or fluid pressure in pipelines, tanks, and other equipment with sensors to ensure safe and efficient operation.
• HVAC (Heating, Ventilation, and Air Conditioning): Control and monitor air pressure in HVAC systems to maintain comfortable indoor environments and optimise energy consumption.
• Water and Wastewater Treatment: Liquid pressure sensors monitor water in pipelines and treatment facilities to ensure proper distribution and prevent leaks or damage.

Other Applications:

• Medical: Pressure transducers are used in medical devices to measure blood pressure, respiratory pressure, and other physiological parameters.
• Automotive: Pressure sensors are used in various automotive systems, such as tire pressure monitoring systems (TPMS), engine control systems, and brake systems.
• Aerospace: Pressure transducers monitor and control pressure in aircraft systems, such as hydraulic systems, fuel systems, and environmental control systems.
• Marine: Pressure sensors are used in marine applications to measure water depth, monitor ballast tanks, and control various systems on ships and boats.

How to Order Pressure Sensors from RS?

RS NZ carries a wide range of pressure sensors and pressure transducers to meet your specific needs. We understand the importance of accurate and reliable pressure measurement for various applications, which is why we stock a wide variety of pressure sensors from leading brands like Honeywell, Telemecanique Sensors, and our own RS PRO.

Our selection includes pressure sensors in various types, such as air pressure sensors, water pressure sensors, liquid pressure sensors, and digital pressure sensors, catering to diverse industrial and commercial applications. Whether you need a low cost pressure sensor for a simple monitoring task or a high-precision pressure transducer for demanding applications, we have got you covered.

Delivery Information for New Zealand

To have your purchases delivered the next working day, please place your orders for items stocked locally in New Zealand or Australia before 5 pm NZT and 3 pm NZT, respectively.

RS will deliver your order between 8 am and 5 pm local time the next working day. However, a longer lead time may be required for some products, including:

• Global Stock and Extended Range products.
• Orders of hazardous materials.
• Products over 20kg, with a cubic weight exceeding 20kg, or longer than 1.5 metres.

Extended lead times may also apply to non-core products and deliveries to specific regional areas. For further details or to arrange consolidated delivery, please speak to our Customer Service.