1-866-404-5415 US and Canada
1-414-299-3896 Outside the U.S.

1-866-404-5415 US and Canada
1-414-299-3896 Outside the U.S.

Pressure Transmitters

Our Pressure Transmitters are an Excellent Choice for a Wide Range of Industries.  Lorem Ipsum from Smartmeasurement!

The SmartmeasurementTM pressure transmitters are for process pressure and hydrostatic level measurement in all kinds of process applications. It is designed for absolute, the ALAP and gauge pressure, the ALGP measurement in open tanks and – as dual version for electronic differential pressure measurement – also in closed vessels. The pressure device features a ceramic capacitive measuring cell that guarantees maximum overload and vacuum resistance for high plant availability. 

The ALDP is a differential pressure transmitter with integrated absolute pressure measurement. The ALDP is a modular instrument for various flow, hydrostatic level or process pressure applications. For DP flow measurements it can be perfectly combined with the SmartmeasurementTM Acone flowbody (make link) or any customer own primary elements such as orifice plates or pitot tubes, etc. Designed with diaphragm seals, it is the perfect choice for hydrostatic level, interface, density or demanding DP process applications. Featuring a quick response time of just 125 ms, the ALDP transmitter offers high accuracy and measurement stability under all process conditions.

 

ALAPT/ALGPT

ALDPT

ALDPLT

Pressure Measurement Operation and Applications

Pressure measurement is the most widely measured variables in the process industries.  Pressure measurement is used in a variety of contexts, such as the pressure exerted by liquid, steam, and gas. For instance, oil & gas industry, wellhead pressures are measured in subsea and topside locations, in water towers, pressure is measured to monitor and control water levels.  Pressure sensors are used to monitor the water pipe pressure in automatic sprinkling systems. Barometric pressure, is used to predict the weather. 

Pressure transmitters have a direct relationship to flow, level, and temperature measurement. Differential pressure (DP) transmitters can measure both flow and level, and some pressure transmitters also utilize temperature sensors to measure process temperature. In some cases, this temperature measurement is combined with pressure and volumetric flow measurements to compute mass flow.

Pressure sensors detects variations in pressure by converting changes in resistance or capacitance to electrical values, these electrical signals are relatively weak and requires a pressure transmitter to carry these values over a distance

Pressure transmitters are typically made up of a pressure sensor, an amplifier or conditioning element, and an output signal. The output signal transmits the pressure reading to a flow computer, controller, or distributed control system (DCS).  Pressure transmitters also typically contain a display that shows the pressure value conveyed by the pressure sensor and convert it into a standardized output, typically either 4-20mA or a digital signal.

There are Four Main Types of Pressure Transmitters

Absolute Pressure (ALAPT)  measures absolute pressure and are referenced to a full vacuum.  Fluid pressure is compared against the reference pressure of an absolute vacuum in a sealed reference chamber. SmartmeasurementTM’s ALAPT measures pressures that are not influenced by atmospheric pressures. Vacuum transmitters are often used where high accuracy is required, such as low-pressure measurement of vacuum distillation columns.

Gauge Pressure ALGPT are referenced to atmospheric conditions.  Gauge pressure transmitters are widely used in the process industries to measure the pressures of liquid, gas, and steam.

Absolute (ALAPT) and gauge (ALGPT) pressure transmitters are replacing pressure gauges, switches, and transducers because are more stable and reliable than pressure transducers.  The process automation industry is more likely to choose pressure transmitters over pressure transducers which cannot transmit information.  

Differential pressure (DP) transmitters (ALDPT) have been used for more than 100 years to measure flowrate. Their strong installed base gives them a pronounced advantage over other types of flowmeters; however, they continually being displaced new-technology flowmeters such as Coriolis and ultrasonic, especially when higher accuracy and greater reliability is required

Differential Pressure transmitters measure the difference between two pressures which is the difference between upstream and downstream of a flow element such as an ACONE, and other DP flow bodies.  They are only used to infer flow a flow rate, in essence a flow meter, see below.

pressure transmitter pic2

Multivariable pressure transmitters (ALDPT-MV) measure two or more process variables. They measure volumetric flow, along with pressure and temperature, and use these values to compute mass flow.  Multivariable transmitters are becoming more widely used for steam and gas flow measurement.  While they are more expensive than single variable DP transmitters, they typically cost less than buying a DP transmitter along with single pressure and temperature transmitters.

Have questions about our Pressure Transmitters? Contact the experts at SmartMeasurement today!

Installation Methods

Primary Application

Special Features

Main Markets

Installation Methods

Primary Application

Special Features

Main Markets

Installation Methods

Primary Application

Special Features

Main Markets

Installation Methods

Primary Application

Special Features

Main Markets