Showing posts with label pressure transmitter. Show all posts
Showing posts with label pressure transmitter. Show all posts

Friday, April 10, 2015

Electrical Pressure Sensor Types

Here is an introduction to the basics of electrical pressure sensors, from Tony Kuphaldt's Lessons in Industrial Instrumentation.

This presentation explains how a variety of electrical pressure sensors work, including piezoresistive (strain gage), differential capacitance, and resonance sensors.

Sensor principles, sensor mounting and associated hardware design for pressure transmitters and differential pressure transmitters are also described.

Click on the image below to open the presentation (viewable on all devices).


pressure sensors
Click on image to see presentation.

Tuesday, August 26, 2014

Pressure Measurement for Industrial Applications


digital pressure gauge
Digital Pressure Gauge
(Winters)
Pressure measurement is critical in many processes and essential in many industries. There are many techniques used to measurement pressure and vacuum (negative pressure). Instruments used to measure pressure are called pressure gauges, switches and transmitters.

Fluid pressure is defined as the measure of force on a surface, per some unit of area, perpendicular to the surface. The standard unit of measurement for pressure measurement in the English system is PSI, or pounds per square inch. In countries that use the Metric system, the Pascal (Pa) or the Newton/meter (N/m2) is used.



Friday, July 11, 2014

Hydrostatic Tank Level Measurement

pressure transmitter
King-Gage pressure transmitter
One of the most proven and reliable methods of continuous tank level monitoring is remotely monitoring hydrostatic pressure.

Hydrostatic pressure is defined as "The pressure exerted by a fluid at equilibrium at a given point within the fluid, due to the force of gravity. Hydrostatic pressure increases in proportion to depth measured from the surface because of the increasing weight of fluid exerting downward force from above.

Pressure transmitters are a simple and accurate choice for measuring liquid level in storage tanks or processing tanks.

hydrostatic level
Typical hydrostatic level application
The principle behind hydrostatic, pressure-based, liquid level measurement is simple since pressure is proportional to the level of liquid multiplied by the specific gravity. The specific gravity of a liquid is the ratio of its own density to the density of water.

Alternatively, level equals the hydrostatic head pressure value divided by the density of the liquid.