8 ways you can improve your pressure sensor’s performance

Pressure sensors, also known as pressure transducers or transmitters, measure the pressure of liquids and gases and convert that measurement into an electrical signal that can be read, logged, and analysed. Most industrial pressure sensors rely on a piezoresistive or strain-gauge sensing element bonded to a thin diaphragm: as pressure deflects the diaphragm by a microscopic amount, the strain changes the element's electrical resistance in a predictable, repeatable way, and the sensor's electronics convert that change into a calibrated pressure reading. The commercial need for these instruments is significant across automotive, medical, industrial, and building services applications, all of which depend on the sensor delivering accurate measurement over its working life, not just when it left the factory. If used for a long period without proper preventative care, the performance of a pressure sensor can decline in ways that are not obvious from the display alone. There are, however, a number of precautions worth taking, including booking regular pressure calibration services in Singapore, proper installation practice, and attentive maintenance. This article explores eight practical ways to protect and improve pressure sensor performance.

How to Boost Your Pressure Sensor's Performance

The effectiveness of a pressure sensor hinges heavily on how well it is matched to its application environment from the outset. Consider these eight factors:

• Pressure Type: Identify whether the application needs a vented, sealed, or absolute pressure sensor. Vented (gauge) sensors use atmospheric pressure as their reference and are common in most industrial process applications; sealed sensors measure pressure relative to a fixed, sealed reference point and suit applications where atmospheric variation would otherwise introduce error; absolute sensors reference a full vacuum and are used where true absolute pressure matters, such as in vacuum process monitoring. Choosing the wrong type for the application is one of the most common specification mistakes we see.
• Resolution: Pressure sensors are usually set to measure accurately within a defined range, and operating well outside that intended range affects both accuracy and resolution. It is essential to ensure the sensor's resolution genuinely matches the pressure range and precision the application actually requires, rather than over-specifying (which wastes budget) or under-specifying (which produces a coarse, unhelpful reading).
• Life Cycle and Duty Cycle: If a sensor needs to operate for only a limited period in a specific environment, many lower-cost options are available. For continuous, long-term industrial use, particularly in applications with frequent pressure cycling, the choice narrows considerably, since repeated flexing of the sensing diaphragm is itself a fatigue mechanism. Choose a sensor rated for the actual duty cycle it will see, and book regular pressure calibration services in Singapore to extend its working life and catch fatigue-related drift before it becomes a functional failure.
• Operating Temperature: Define the temperature range needed for optimal sensor performance before selecting a unit. Electronic sensors, in particular, can struggle at temperature extremes, since the sensing element's own electrical characteristics shift with temperature; consistent output depends on operating within the range the manufacturer has actually characterised and compensated for.
• Measuring Range: A sensor's upper and lower pressure limits are critical, especially for differential and gauge pressure measurements where the application may spend most of its time near one end of the range. Ensure the sensor operates comfortably within its necessary range, ideally with some margin, to avoid both malfunction from overpressure and the accuracy penalty that comes from operating too close to a sensor's lower limit.
• Pressure Measurement Method: Sensors can use various measurement principles, and selecting the right one for the application is essential for accurate readings. Regularly following the correct procedure for pressure gauge calibration, matched to the sensor's specific measurement method, avoids introducing deviation from a mismatched calibration approach.
• Overpressure Rating: Check a sensor's overpressure rating to avoid safety risks such as bursts or leaks from excess pressure, and confirm it can handle occasional pressure spikes common in the actual process, such as water hammer in a hydraulic line or a pump start transient, without permanent damage to the sensing diaphragm.
• Chemical Resistance and Wetted Materials: When measuring pressure in chemically active liquids or corrosive gases, the sensor's wetted materials matter as much as its electrical specification. Chemical interactions can degrade the sensing diaphragm over time, so select a sensor whose wetted parts are specifically rated for the chemicals involved in the application, rather than assuming a generic stainless steel diaphragm is universally compatible.

Installation Practices That Protect Long-Term Accuracy

Selection is only half the equation; how a sensor is installed materially affects how well it performs over time. Mounting orientation matters for liquid-filled or diaphragm-seal systems, since an incorrect orientation can trap air bubbles that introduce measurement error. Impulse tubing should be kept as short as practical and properly sloped to avoid trapping condensate, which is a particular concern in Singapore's humid environment where moisture readily condenses inside unheated tubing runs. Isolation valves should be exercised periodically rather than left permanently open or closed, since a valve seized in one position defeats its purpose during the next maintenance event. Getting installation right the first time avoids performance issues that no amount of recalibration can fully correct.

Recognising Drift Before It Becomes a Failure

Pressure sensors rarely fail outright without warning; more often they drift gradually, and catching that drift early is what separates a planned recalibration from an unplanned production stoppage. Watch for a sensor's zero reading shifting over time when the system is known to be at atmospheric pressure, since a genuine zero-point should remain stable between calibrations barring a real fault. Watch for output that becomes noisier or less repeatable at a given pressure than it used to be, since increasing signal noise often precedes a more significant sensing element failure. And compare readings periodically against a portable reference calibrator on a spot-check basis between full calibrations for critical applications, since this kind of interim verification catches a sensor drifting out of tolerance well before its next scheduled service date, at minimal extra cost compared to the disruption of discovering the problem only once it has already affected the process, and it is a habit worth writing into a facility's standard operating procedure rather than leaving to individual initiative.

Keeping Spares on Hand for Critical Applications

For pressure sensors monitoring genuinely critical processes, keeping a pre-calibrated spare on hand can materially reduce downtime when a sensor does eventually need to be swapped. A spare sensor calibrated and ready to install lets a facility restore full operation within minutes of identifying a fault, rather than waiting for an emergency calibration to be arranged and completed before the process can safely resume. This is a small additional cost that pays for itself the first time it prevents a genuinely costly unplanned stoppage.

Bringing It All Together

By considering these factors together, from the sensing technology itself through to installation practice, a business can choose a pressure sensor that genuinely meets its needs and performs reliably over its working life. Proper selection, correct installation, and consistent maintenance all enhance sensor performance and ensure accurate pressure monitoring. For guidance on the reference instrument used to verify that performance, see our companion article on choosing the right pressure calibrator. Unitest Instrument offers pressure gauge calibration services in Singapore. Book our service today.