How the Rosemount 3051 Pressure Transmitter Works

When the 3051 Pressure Transmitter is in operation, the high and low pressure isolation diaphragms and fill fluids transfer the process pressure to the fill fluid. The fill fluid then transfers the pressure to the sensor diaphragm in the center of the sensor. The sensing diaphragm is a tensioned elastic element whose displacement varies with the pressure applied (for GP gauge transmitters, atmospheric pressure acts as if it were applied to the low pressure side of the sensing diaphragm). AP pressure transmitter, the low pressure side always maintains a reference pressure. The maximum displacement of the sensing diaphragm is 0.004 inches (0.1 mm) and the displacement is proportional to the pressure. The capacitive plates on both sides detect the position of the sensing diaphragm. The difference in capacitance between the sensing diaphragm and the capacitor plate is converted to the corresponding current, voltage or digital HART (High Speed ​​Addressable Remote Transmitter Data Highway) output signal.
Second, the 3051 pressure transmitter features a complete transmitter series Measuring range: 0-0.5inH2O to 6000psig
Compact, rugged, shock-resistant structure Modular structure Damping adjustable Various options for flexible applications Smart, analog or low-power circuits Electrical connection and mounting: Equipped with a variety of process connectors and mounting flanges.

Third, 3051 pressure transmitter and its classification
3051C, gauge and absolute pressure transmitter
Excellent performance: Accuracy 0.075% Turndown 100:1
Differential pressure: Calibration range from 0.5inH2O to 2000psi
Gauge pressure: Verification range from 2.5inH2O to 2000psi
Absolute pressure: calibration range from 0.167 psia to 4000 psia
Process isolation diaphragms: stainless steel, Hastelloy CR, Monel R, enamel (CD, CG only) and gold-plated Monel Small, rugged, lightweight and easy to install
3051T Gauge and Absolute Transmitter
Excellent performance: precision 0.075%
Absolute pressure: calibration range from 0.3 to 10,000 psi
Gauge pressure: Calibration range from 0.3 to 10,000 psi
Stainless steel and Hastelloy CR process isolation diaphragm Single isolation diaphragm design Filling fluid: silicone oil and inert oil Optional DIN and Autoclave matching process connection
3051L Level Transmitter
Level measurement accuracy up to 0.075%
Verification range from 2.5inH2O to 8310inH2O
Flat, 2-, 4-, and 6-inch extended diaphragms available in a variety of optional fill fluids to meet the needs of different occasions Compact and lightweight, easy to install and maintain wetted parts materials: stainless steel, Hastelloy andé’½
3051H High Process Temperature Pressure Transmitter
Measurable process temperatures up to 375°F (191°C) without remote diaphragm seals or capillary precision 0.075%, 100:1 turndown ratio
Temperature effect and time response decrease in high temperature applications Sensing membrane heads and circuit boards are the same as Model 3051C
3051P Reference Pressure Transmitter
Accuracy 0.05%—The most accurate pressure transmitter currently has the unparalleled performance of the ideal product for custody transfer, financial calculation and distribution measurement, no longer need to store a variety of transmitters to reduce the influence of temperature, no separate jacket can be used for poor Pressure and gauge pressure measurements
3051C Low Power Pressure Transmitter
The world's only intelligent low-power pressure transmitter High performance, precision 0.075%
Differential pressure, gauge pressure and absolute pressure models have all the features of the 3051C model, including a true digital meter operating from 6 to 12 volts at DC power consumption of 18 to 36 milliwatts, while a typical 4 to 20 milliampere transmitter consumes 200 milliwatts of power. The above 0.8-3.2V and 1-5V output optional sensing membrane head is the same as the standard (4-20mA) 3051C type

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