When browsing through pressure measurement products you will notice that some of the products are called pressure transducers and others are called pressure transmitters.
A pressure transducer is any device that fundamentally converts an applied pressure into an electrical signal. There have been many different types of pressure transducer developed over the years such as bonded foil, thick film, thin film, variable capacitance, LVDT & semiconductor strain gauge to name just a few. All of these sensing technologies are used to convert a pressure into a measurable electrical signal.
Since the transducer core signal varies significantly from one device to another it is often necessary to add some electronic compensation to trim the zero & span offsets and reduce thermal sensitivity over the operating temperature range.
TPS Strain Gauge Pressure Sensor
Chemical Resistant Pressure Sensor Elements for Electronic Devices & Embedded Product Design & Development
10bar water network transducer with 40bar over-pressure
100 psig range mV/V output air pressure sensor for food processing use
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Some pressure transducers are manufactured without any compensation circuitry which are called pressure transducer capsules, modules or headers. These pressure transducer elements and then integrated with electronics by instrument manufacturers to compensate the pressure transducer, and bring the output signal within the design parameters required by the instrumentation specification.
Due to the weak signal generated by the pressure transducer, it is only used over relatively short distances, such as inside a test laboratory or inside some instrumentation. When you want to run the electrical output signal over greater distances, some additional electronics is required to boost the signal. This is when it is necessary to add an amplifier to a pressure transducer to transmit the signal. A pressure transducer which has been combined with an output signal amplifier is typically called a pressure transmitter.
DMP331 Precision Pressure Transmitter
DPS Low Differential Pressure Transmitter
35X HTC High Temperature Digital Pressure Sensor (< 300 degC)
DMK351 Liquid and Gas Resistant Intrinsically Safe Low Range Gauge Pressure Sensor
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Many types of amplified signals have been developed over the years as electronics have advanced and power considerations have changed, the most common type are 4-20mA current loop pressure transmitters and amplified voltage output pressure transducers.
Despite the distinguishing technical differences between a pressure transducer and a pressure transmitter, both have become synonymous with describing any type of pressure sensor, and are often interchanged by different manufacturers. So from a marketing and product naming point of view there is no common distinction between the two types of pressure sensor.
DMP304 Ultra High Range Hydraulic Pressure Transducer
SIL 2 Approved Pressure Transmitters
TPFAS Miniature Flush Diaphragm Pressure Sensor
DMK331P Flush Diaphragm Pressure Sensor
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