Pressure Sensor PCB

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What is a sensor PCB?

PCB Piezotronics means is a manufacturer of piezoelectric sensors.

The named “PCB” is abbreviation for “PicoCoulomB” which is technical terminology defining an electrical charge of the type generated by the piezoelectric sensors they proceed. It’s also a registered trademark of the company. “Piezotronics” united the science of Piezoelectricity and electronics.

sensor PCB
pressure sensor work

How does a pressure sensor work?

A pressure sensor works by transfering pressure into an analogue electrical signal.

The requires for pressure measuring instruments raise during the steam age.Nowadays we measured pressure electronically making pressure transducers and pressure switches.

How is a pressure sensor made?

A static capacitance pressure sensor has a capacitor that’s made by a static glass electrode and an contrarily movable silicon electrode.

and it converts changes in static capacitance that appear when the movable electrode is distorted because of an external force (pressure) into an electrical signal.

pressure sensor made

Venture is a leading manufacturer and supplier of Pressure Sensor PCB. We have more than 10 years of experience in this area.

A full range of Pressure Sensor PCB is offered.

We aim to provide high-quality, durable, and the best Pressure Sensor PCB for our beloved customers.

In order to achieve our goal, we are striving to do our best.

 

Your Leading Pressure Sensor PCB Supplier in China

If you are looking for the best Pressure Sensor PCB, then you are in the right place!

We assure you of our quality products. All of our products are guaranteed and proven.

Venture is offering cost-effective Pressure Sensor PCB products. We have a wide selection of Pressure Sensor PCB so that you can select your desired Pressure Sensor PCB.

Sensors are small electromechanical instruments for the measurement of dynamic pressure, load, force, acoustics, torque, acceleration, strain, shock, vibration, and sound.

You can request your design of Pressure Sensor PCB. We are happy to provide your needs.

Venture has the best PCB solutions in the market. We are specialized in providing high customer service.

We accept small or large orders of pressure sensor PCBs.

Contact us for more details.

Pressure Sensor PCB: The Ultimate FAQ Guide

Pressure-Sensor-PCB-The-Ultimate-FAQ-Guide

Before buying pressure sensor PCB, read this guide.

It has all the relevant information you’re looking for about pressure sensor PCB.

So keep reading to learn more.

What Is A Pressure Sensor PCB?

A pressure sensor PCB is an electronic device you employ in the measurement of gas or liquid pressure.

You typically mount this device on a circuit board from where it communicates signals.

The pressure sensor PCB allows you to measure the gauge pressure, absolute pressure or differential pressure for a variety of applications.

Some of these applications include measuring the flow of air or gas and determining pressure using a barometer.

A pressure sensor PCB encompasses an element sensitive to pressure that detects any pressure changes upon application.

It then converts the information into an electrical signal for an output.

There are several designs of pressure sensors with different applications and consequently cost.

There are high speed pressure sensor PCBs and those that act as switches upon attainment of certain pressures.

Pressure Sensor PCB

Pressure Sensor PCB

Where Do You Employ Pressure Sensor PCBs?

Pressure sensor PCBs have a wide range of application traversing different industries.

You find pressure sensor PCBs employed in the automotive industry, in medical devices, in HVAC systems and general industrial applications.

Furthermore, apart from pressure, you can use pressure sensor PCBs to undertake other pressure related measurements.

Consequently, you find pressure sensor PCBs useful in measurements such as altitude, flow rates, depths and detecting leakages.

Some common applications of pressure sensor PCBs are:

Pressure Sensing

Pressure sensor PCBs find use in applications where you need to determine the pressure of a fluid.

Pressure sensing application of pressure sensor PCBs is common in automobiles, weather instruments, medical devices and aircrafts.

In medical application, you find pressure sensor PCBs useful in ventilators for determining the appropriate oxygen pressure for patients.

Additionally, pressure sensor PCBs are useful in hyperbaric chambers and automation of drug delivery such as IV fluids.

Flow Sensing

Use of pressure sensor PCBs in flow sensing is dependent on the “venturi effect” which determines differential pressure.

The differential pressure is taken between the two segments of a venturi tube with separate apertures.

You note that the pressure difference has a direct relationship with the rate of flow via the tube. Consequently, where you have a low pressure then you have a small pressure difference.

Flow sensing pressure sensor PCBs are present in automobile engines in the provision of appropriate air and fuel mix for combustion.

Additionally, you find pressure sensor PCBs use in flow sensing in weather instrumentation fashioned for determining speeds of air flows.

Leak Testing

Pressure sensor PCBs can be useful in determining the effect on pressure caused by a leakage. Here, you employ differential pressure in comparing to a determined leakage or periodically tracking the changes in pressure.

You can employ pressure sensor PCBs in leak testing for braking systems for vehicles.

The sensors can help you detect anomalies in brakes employing hydraulic fluids hampering their functionality.

Altitude Sensing

Using pressure sensor PCBs in altitude sensing is applicable in aircraft, satellites, space vehicles and weather balloons amongst others.

When used for altitude sensing, pressure sensor PCBs evaluate pressure changes with the altitude.

You find the application of pressure sensor PCBs in altitude sensing useful in GPS systems. You can determine the altitude of a place by relating with the barometric pressure.

Level Or Depth Sensing

Pressure sensor PCBs are also helpful when determining fluid levels especially for submerged objects or storage tanks.

You find the level of a fluid has a direct relationship to its pressure at a particular point.

By placing pressure sensor PCBs at the base of a storage tank, you can determine the fluid level. You detect a pressure reduction as the fluid level drops signifying the fluid volume and disregarding the tank shape.

Are Pressure Sensor PCBs Analog Or Digital?

You define analog sensors by the continuous production of output signals of analog nature that is proportional to the measured quantity.

There are pressure sensor PCBs that are analog which you employ in the measurement of pressure.

You find the analog signal a pressure sensor PCB produces as output to be proportional to the applied pressure quantity.

Notably, there are pressure sensor PCBs that generate an electric charge such as piezoelectric sensors.

Digital sensors convey data digitally and consist the main parts of senor, cable and transmitter. A digital sensor internally converts the measurement into an output of digital characteristics before transmission.

You can improve the accuracy of a digital pressure sensor PCB by employing an uncorrupted output signal of high resolution.

You find digital pressure sensor PCBs incur no loss or interference as opposed to analog pressure sensor PCBs.

Additionally, a digital pressure sensor PCB possesses a microprocessor that characterizes the measured parameter digitally eliminating errors of linearity.

However, you find such pressure sensor PCBs affected by hysteresis and operational repeatability.

Digital Pressure Sensor PCB

Digital Pressure Sensor PCB

How Is The Pressure Gauge Different From The Pressure Sensor PCB?

A pressure sensor PCB converts a measurement of pressure on the sensor into an analog or digital signal for output.

You can furnish pressure sensor PCBs differently in the way they convert and transmit the pressure data.

A pressure gauge differs from the pressure sensor PCB in that it produces a direct pressure measurement as output.

Pressure sensor PCBs do not provide a direct pressure value but rather converts the pressure measurement into an electrical signal.

It is this electrical signal that the pressure sensor PCB processes and converts into an output that is a visible reading.

However, you can find both analog and digital options of the pressure gauge similar to pressure sensor PCBs.

What Is The Difference Between A Transducer And Transmitter In Relation To A Pressure Sensor PCB?

The pressure transducer and pressure transmitter differ in the pressure sensor PCB.

For the pressure sensor PCB, the electronic components involved in data conversion and transmission are external to the device.

Contrarily, you find the pressure transducer and pressure transmitter have the electronics fashioned in their construction.

The output signal provided by pressure sensor PCBs is in millivolts with some resistance loss signifying the need for reduced wiring.

Therefore, when mounting a pressure sensor to a PCB, the point of conversion and transmission should be close.

Having reduced wire lengths within close proximity to the sensors and microprocessors minimizes signal loss.

Additionally, the output signal of a pressure sensor PCB is proportional to the voltage supplied to the sensor.

The output voltage is in millivolts making the designing with signal conditioning easier while also reducing sensor cost and packaging needs.

Alternately, pressure transducers can amplify signals resulting in outputs with higher voltages and frequency.

You can boost a pressure transducers output signal by five to ten volts and frequency by one to six kilohertz.

Due to the boosting capability of a transducer, you can position the transducers at greater distances from the electronics.

You find the pressure transducers high output voltage have low current demands making them viable with DC voltage sources.

Pressure transmitters generate current outputs with low impedance with analog characteristics of about four to twenty milliamperes.

Pressure transmitters are typically with two-wire or four-wire design and are relatively invulnerable to electrical noise.

As a result, you find pressure transmitters most viable where signal transmission is over an extended distance.

While pressure transmitters can function in the absence of regulated power, they consume a lot of power with high current output.

You find these qualities make them unfavorable when employing DC voltage source and at full pressure values.

What Are The Key Pressure Terminologies Relating To Pressure Sensor PCBS?

The major pressure terminologies when using a pressure sensor PCB are:

Gauge Pressure

Gauge pressure refers to pressure measurement in relation to ambient pressure such as when determining a vehicle’s tyre pressure.

Here, you use a pressure gauge in determining pressure where the reading provides how much the pressure exceeds the ambient pressure.

Differential Pressure

The difference in pressure between a set of measurements describes the differential pressure. Consequently, differential pressure is a comparative measure between two pressure values and not to atmospheric or other pressure referral.

Absolute Pressure

When you measure a pressure in relation to that of a vacuum condition, you determine its absolute pressure.

The absolute pressure is essential for aerospace calculations of air pressure at different altitudes.

Vacuum Pressure

Measuring pressures relative to atmospheric pressure but in the negative direction gives you vacuum pressure.

What Are The Types Of Pressure Sensor PCBS?

You can classify pressure sensor PCBs by their sensing mechanism giving you the following types:

Potentiometric Pressure Sensor PCBs

The potentiometric pressure sensor PCBs employ mechanism where pressure measurement is by the movement of a pointer. Usually, a Bourdon tube or capsule drives the pointer.

Inductive Pressure Sensor PCBs

With this type of pressure sensor PCB, you employ a differential transformer with linear variability.

The transformer varies the primary and secondary coil’s inductive coupling degree.

Capacitive Pressure Sensor PCBs

In this pressure sensor PCB type, the detected pressure causes a deflection of the diaphragm. Consequently, you observe a capacitance value change whose interpretation and conversion results in a reading.

Piezoelectric Pressure Sensor PCBs

The piezoelectric pressure sensor PCB utilizes the piezoelectric effect present in certain materials like quartz and ceramics.

With the piezoelectric effect, you can determine the strain resulting from an applied pressure.

The piezoelectric pressure sensor PCB offers you the best results when it comes to measuring high-level dynamic pressure systems.

However, static pressure systems form a poor measurand for piezoelectric pressure sensor due to lack of dynamics.

Piezoelectric Pressure Sensor

Piezoelectric Pressure Sensor

Strain Gauge Pressure Sensor PCBs

Strain gauge pressure sensors PCBs employ an element sensitive to pressure changes in its configuration consisting metal strain gauges.

These strain gauges are attached by gluing together or application of thin film gauges.

You can use a diaphragm as a measuring element in this pressure sensor PCB or metal foils presented in cans.

A can-type metal foil film gauge offers you enhanced rigidity with the ability of measuring very high pressures.

Variable Reluctance Pressure Sensor PCBs

In this pressure sensor PCB type, the design includes a magnetic circuit containing a diaphragm. When the sensor senses some pressure, the diaphragm deflects altering the circuit’s reluctance.

The change can be converted and decoded to reflect the application of a particular pressure.

Piezoresistive Pressure Sensor PCBs

Piezoresistive pressure sensor PCBs employ the piezoresistive effect when you bond strain gauges.

In this effect, when the sensors detect an applied pressures, a strain results with increasing resistance that causes deformation.

The circuit formed by the strain gauges in a piezoresistive pressure sensor PCB resemble a Wheatstone bridge.

This circuit configuration exploits the sensor’s output and lowers error susceptibility making it the go-to type in pressure measurement.

What Are Some Of The Specifications Of A Pressure Sensor PCB?

With the different pressure sensor PCBs, and manufacturers comes different parameters and specifications.

However, you find some common specifications related to the pressure sensor PCB as follows:

Sensor Type

The type of a pressure sensor PCB is essential in determining the intended pressure it is to measure.

There are different pressure terminologies when working with pressure sensor PCBs including gauge pressure, absolute pressure, differential pressures and vacuum pressure.

Operating Temperature Range

The range of operating temperature provides the temperature extremities which the pressure sensor PCB can sustain operations.

Within these temperatures, you can effectively operate the pressures sensor PCB with no problems.

Range of Operating Pressure

The operating pressure range describes the pressure within which the pressure sensor PCB has functional effectiveness.

Within this range, the pressure sensor PCB can output a signal for processing and interpretation.

Supply Voltage

The supply voltage refers to the voltage amount that a pressure sensor PCB requires for power up.

The voltage amount is in volts and usually provided as a range.

Maximum Pressure

The maximum pressure is an absolute pressure value beyond which the pressure sensor PCB can fail or exhibit inconsistency.

You can however, effectively operate the pressure senor PCB up to this pressure value without failure.

Accuracy

Accuracy refers to how close the measured pressure captured by the pressure sensor CB is close to the actual pressure value.

When expressing accuracy you use plus or minus sign before the pressure value signifying the deviation.

Full Scale

Full scale describes the pressure difference between the absolute maximum the sensor can handle without failure and zero pressure.

Output Type And Level

The output type defines the features of a pressure sensor PCB’s output signal such as analog values of current and voltage.

The output level defines the pressure sensor PCB’s operational signal output range in voltage or current values i.e. millivolts or milliamps.

What Affects The Accuracy Of A Pressure Sensor PCB?

Accuracy of a pressure sensor PCB is paramount in ensuring a long and useful service life.

The following factors can affect the accuracy of a pressure sensor PCB:

  • Temperatures outside the operating temperature range.
  • The PCB materials’ dielectric constant value.
  • Excess pressure beyond which the pressure sensor PCB cannot accommodate.
  • The specific gravity.
  • Mechanically induced strains such as shocks and vibrations.
  • The barometric pressure.
  • When you install the pressure sensor PCB improperly, you affect its accuracy.
  • The pressure sensor PCB’s natural drift from continued use.

How Does A Capacitive Pressure Sensor PCB Work?

A capacitive pressure sensor PCB allows you to obtain pressure readings by interpreting capacitance changes caused by diaphragm movement.

Consequently, a capacitive pressure sensor PCB employs a capacitor in its configuration formed by two parallel plates with conductive capabilities.

The working of the capacitive pressure sensor PCB depends on the spacing between the parallel plates.

You can convert one or both plates to acts as diaphragms and any detected air pressure can adjust the spacing.

Figure 4 Capacitive Pressure Sensor Circuit Board

Capacitive Pressure Sensor Circuit Board

What Are The Pros And Cons Of Employing A Capacitive Pressure Sensor PCB?

The capacitive pressure sensor PCB has the following advantages:

  • These sensors consume very little power as the sensor element does not require direct current. You only require a current during the measurement of capacitance when a signal traverse the circuit.
  • The capacitive pressure sensor PCBs have simple construction and you can have them ruggedized for extreme environments.
  • Where you have excess pressure conditions beyond the sensor’s scope temporarily, these sensor PCB type can withstand such.
  • Capacitive pressure sensor PCBs have good repeatability and low hysteresis and temperature changes barely affect their operation.

However, the capacitive pressure sensor PCB has the following limitations:

  • The output of capacitive sensors is non-linear and attempts to address this can result in higher hysteresis levels.
  • You need accurate circuit design for this pressure sensor PCB due to high impedance observed in output. You also reduce parasitic capacitance by carefully designing the circuit.

What Are Piezoresistive Pressure Sensor PCBs?

Piezoresistive pressure sensor PCBs measure pressure by determining the electrical resistance changes of a material.

You can employ this pressure sensor PCB for measuring all pressure measurements including gauge, differential, absolute and relative pressure.

The piezoresistive pressure sensor PCB employs a strain gauge with conductive properties whose electrical resistance changes upon stretching.

You typically employ a diaphragm to detect the resistance changes upon sensing of pressure.

What Are The Advantages And Disadvantages Of A Piezoresistive Pressure Sensor PCB?

When using the piezoresistive pressure sensor PCB you find it is robust with impressive performance stability and calibration aspect.

However, these sensors PCBs have high power consumption and using them for portable devices and DC power is improbable.

Where you employ metal film as your sensing element in the piezoresistive pressure sensor PCB, you find it highly durable.

Furthermore, you can work with such sensors at very high temperatures reaching 200 °C.

How Does A Piezoelectric Pressure Sensor PCB Function?

In a piezoelectric pressure sensor PCB, application of force on the piezoelectric material results in generation of electric charge.

The charge passes across the crystal face and its voltage measured relative to the applied pressure.

Additionally, when the piezoelectric effect occurs inversely during voltage application, it causes a shape change.

Consequently, a charge on the sensor results from a static force generation and decay as a result of insulation imperfections.

What Benefits Do You Derive From Using A Piezoelectric Pressure Sensor PCB?

Piezoelectric pressure sensor PCBs have the following advantages:

  • Piezoelectric pressure sensor PCBs are rugged allowing their use in extreme environments such as space and oil drilling.
  • You can use these sensor PCB types at very high temperatures reaching 1,000 degrees Celsius.
  • Since the signal generated for output is by piezoelectric effect, these sensors consume very little power.
  • You can make piezoelectric pressure sensor PCBs using cheaply available material such as quartz making them affordable devices.

What Are MEMS Pressure Sensor PCBs?

MEMS stands for Microelectromechanical Systems which refers to systems employing small silicon elements of electronic and mechanical properties.

Such systems employ the technology for making semiconductor devices such as transistors and integrated circuit chips.

A MEMS pressure sensor PCBs employs such fabrication techniques by constructing the sensor element and accompanying circuitry on a single chip.

Consequently, you can furnish several such sensors by employing the same manufacturing protocols you do in chip manufacture.

MEMS pressure sensor PCBs are small in size, consume very little power and offer impressive performance stability over time.

Consequently you find such sensor PCBs useful in space technology such as satellite where an extended life is desirable.

How Do You Employ Optical Pressure Sensor PCBs?

Optical pressure sensor PCBs measure pressure changes by examining cause and effect on a light. An optical pressure sensor PCB can constitute a mechanical device that cuts off light on increasing pressure.

When you experience an increase in pressure, an optical pressure sensor PCB responds by clocking the light.

You then determine the pressure measurement by evaluating the changes in light reception using a photodiode.

You can also use interferometry when using optical pressure sensor PCBs where pressure changes result from changing light phases.

In such cases, you can achieve pressure measurements from fractional changes in a light’s wavelength.

What Are The Characteristics Of Optical Pressure Sensor PCBs?

Optical pressure sensor PCBs have the following characteristics:

  • These sensor PCBs are unaffected by changes in temperature.
  • The reduced movement of components results in low encounters of hysteresis and errors of repeatability.
  • Optical pressure sensor PCBs are small and highly flexible allowing use in confined and difficult to reach areas.
  • These sensor PCBs employ passive elements independent of power making them less susceptible to electromagnetic interference and parotic capacitance.
  • They can be susceptible to mechanical movements and acoustics due to their high sensitivity.

What Factors Do You Consider When Selecting A Pressure Sensor PCB?

Selection of pressure sensor PCBs involves consideration of the following factors:

  1. The compatibility with the intended media of measurement such as gas or liquid. Common media you employ pressure sensor PCBs with includes air, gas, water, liquids such as fuel and hydraulic fluids.
  2. The maximum pressure required for measurement determines your selection of a pressure sensor PCB.
    Pressure sensor PCBs can be suitable for light pressure measurements not exceeding fifty bars while others can handle higher pressures.
  3. The area of use of a pressure sensor PCB is important. For instance, pressure sensor PCBs intended for medical use need to be safe and hygienic.
  4. The package type for mounting your pressure sensor PCB ensures you form the appropriate board connection.
    There are various packages you can use with the pressure sensor PCBs including dual in-line packaging.

Why Is Corrosion An Important Factor When Choosing A Pressure Sensor PCB?

Corrosion is an important factor when selecting a pressure sensor PCB especially considering the fluid media of pressure measurement.

Corrosive media includes salty water, acidic or alkaline media which require you to select a sensor PCB with corrosion resistance.

Pressure sensor PCBs with corrosion resistance employ improved steel, titanium or alloys of nickel for the cases and diaphragm.

You can also use for rubber additions or weld the diaphragm to the body of the sensor to increase resistance to corrosion.

Are Pressure Sensor PCBs Affected By Physical Noise Sources?

Yes, they can.

Employing pressure sensor PCBs in the presence of physical noise sources, can impede the accuracy of pressure measurement.

The vibrations you experience can interfere with the measuring mechanism and such sources should be isolated.

At Venture Electronics, we offer a range of PCB assemblies depending on unique application requirements.

Simply tell us what you need and we will design and fabricate a perfect pressure sensor PCB for your applications – talk to us now.

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