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Pressure

Pressure Sensors and Transmitters

Available in configurations for gauge, absolute, and differential pressures, these transmitters cater to diverse industrial needs, including level sensing in tanks. Customizable options include units with integrated displays and outputs, accommodating different measurement ranges, fluid types, temperatures, and process connections. In the Philippines, a wide range of standard and customizable pressure transmitters are offered, ensuring accurate and efficient pressure management solutions.

What is a Pressure Transmitter and How is it Different from a Pressure Gauge?

A pressure transmitter is an advanced device designed to measure pressure and convert it into an electrical signal, such as 4-20mA, which can then be sent to a control system or monitoring device. Unlike a pressure gauge, which provides a direct visual reading of pressure, a pressure transmitter provides an electronic output that allows for continuous data monitoring and integration into automated systems.

How It Works:

Measurement: The transmitter detects changes in pressure through a sensing element.
Signal Conversion: It converts these pressure changes into an electrical signal, typically in the form of 4-20mA or another standardized format.
Transmission: This signal is then transmitted to a remote monitoring system or control unit, where it can be used for real-time data analysis, control actions, and logging.

Pressure measuring solutions, whether you are looking gauge pressure, absolute pressure or even differential pressure.

The instrument can be used to display the pressure measurement on it’s own built in display unit to to a PLC or DCS so that pressure in different areas of the process can be adjusted if needed, fluid monitored and controlled more precisely e.g. air or gas pressure measurement.

Pressure sensors and transmitters also enable operators to provide alarms to sense sudden drops or increases in pressure.

What is a Pressure Sensor?

A pressure sensor is an instrument that senses a mechanical pressure and either displays this pressure, transits this pressure to another location or both.

Stand-alone Pressure Transducer (pressure sensing part/transducer)

Simple Pressure Transmitter with output signal. With or without display.

A Wide Range of Pressure Transmitters to suit various gas liquid and steam applications.

Pressure Transmitters

The image is a complete set of pressure transmitters which includes transducers coupled to transmitters with local display and various analog and digital outputs.

Screwed type

Transmitters have threaded connections for easy installation directly into pipes or equipment, making them great for general use.

Flanged type

Transmitters use flanges to bolt onto pipes or tanks, providing a strong, leak-proof connection for high-pressure systems and large pipelines.

Remote type

Transmitters have a separate sensor connected by a tube or conduit, allowing measurement in tough-to-reach or harsh environments while keeping the transmitter in a more accessible spot.

Sanitary connection

Transmitters feature special fittings like tri-clamps to meet hygiene standards, making them ideal for industries where cleanliness is crucial, such as food processing or pharmaceuticals. Each type is designed to provide reliable pressure measurement for its specific application.

More About Pressure Sensors

Very often it is necessary to demystify common nomenclature related to pressure sensing equipment and what are commonly known as pressure sensors. In a sense, pressure gages could be considered as pressure sensing equipment but the term “gage” normally refers to a device that is often using a bourdon tube attached to a mechanism that moves a pointer on a pressure scale. A “pressure sensor” is also known as a pressure transducer, pressure transmitter, and pressure indicator or P to E (P being pressure and E being electrical) as opposed to an E/P transducer which are commonly seen in control equipment applications such as control valves where a 4-20mA signal can be generated to produce a pressure output proportional to the electrical, such as 3-15 PSI.

Most common types of pressure transmitters now employ piezoelectric crystals (simplified technique shown above) which are used to detect, measure, and control fluid pressure in industrial processes. Pressure sensors have wide and almost universal applications and are considered to be important tools for detecting, monitoring, reading, and displaying changes in applied pressure from a contained volume of liquid or gas. Pressure sensors are a common sight in the bottling industry and can be used to detect leaks. Installations are all around medium-sized and large compressors, filters, ducts, pneumatic and hydraulic circuits, and mining equipment.

Table showing common pressure units in industrial settings

atmospheres
bars
centimeters mercury
centimeters water
feet of water
hectopascals (hPa)
inches of water
inches of mercury

kilogram-forces/sq. centimeter
kilogram-forces/sq. meter
kilopascals (kPa)
kips/sq. Inch
meganewtons/sq. meter
meters of water
millibars
millimeters of mercury

millimeter of water
newtons/sq. centimeter
newtons/sq. meter
newtons/sq. millimeter
pascals (Pa)
pounds-force/sq. foot
pound-force/sq. inch
poundals/sq. foot

tons (UK)-force/sq. foot
tons (UK)-force/sq. inch
tons (US)-force/sq. foot
tons (US)-force/sq. foot
tonnes-force/sq. cm
tonnes-force/sq. meter
torr (mm Hg 0°C)

For pressure unit conversions visit:

https://processassociates.com/process

Our standard specifications are published in Mpa. For example, a common type of pressure transmitter might have a range of 0-100Mpa. Our standard pressure transmitters have 22 default engineering units which can be selected through the programming keypad.

What units are these pressures measured in?

Although there has been a move to standardize on SI units e.g pascals, there are many other units both imperial and metric in origin that are commonly used in industrial settings. The pressure transmitters offer a wide range of measurement units in metric, imperial and SI Units.

How could we best classify pressure transmitters?

To make it easier for clarification, engineers and technicians normally divide pressure sensors /pressure transmitters into three groups.

Gauge Pressure sensors
Absolute Pressure sensors
Differential Pressure sensors.
Level Sensors (by pressure measurement)

Contact us with your pressure measurement requirements so that we can select the most appropriate pressure transmitter or differential transmitter for your application whether it be measuring absolute pressure, gage pressure or part of a level sensing set up in a tank. If the fluid is other than water in a tank, a calibration factor can be applied to the transmitter that will adjust for the deviation from standard water column readings.

Send your pressure measurement requirements by answering the following:

We supply a full range of pressure transmitters and differential pressure transmitters in the Philippines. Standard pressure devices are normally quick delivery. Custom ranges, connections and higher accuracies are available on request.

Pressure measurement

a. Gauge Pressure

b. Absolute Pressure

c. Vacuum

Measurement Range

a. 0-100 MPa

b. Other (Please Specify)

Accuracy

a. ± 0.1%

b. Other (Please Specify)

Process Media Type

a. Please specify fluid and application

Media Temperature

a. -40-120℃

b. Other (Please Specify)

Process Connection

Threaded or Flanged (specify size and type)

Pressure

Pressure Sensors and Transmitters

What is a Pressure Transmitter and How is it Different from a Pressure Gauge?

What is a Pressure Sensor?

Pressure Transmitters

More About Pressure Sensors

Table showing common pressure units in industrial settings

For pressure unit conversions visit:

What units are these pressures measured in?

How could we best classify pressure transmitters?

Send your pressure measurement requirements by answering the following:

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