Pressure gauges often have a wide variety of uses except for specific models that are manufactured for specific applications. Differences in pressure measurement instruments primarily exist in regard to their measurement accuracy, pressure range, pressure connection, and electrical connection.
Given all the potential configurations, choosing the right pressure gauge can be a daunting prospect. In this blog post, we’ll take a closer look at the five most important considerations that can help make the selection process easier.
1. Pressure range
The pressure range of the measurement instrument specifies the minimum and maximum limits of the amount of pressure that can be monitored or measured. Depending on your application, the measurement range can be very narrow or very wide. It’s best to choose an option that safely incorporates the entire range with some cushion on each end to prevent malfunction.
2. Pressure Connection
The pressure connection, or process connection, links the sensor with the pressure medium. Most pressure connections come with a standard thread, which can be installed at the point where pressure is supposed to be measured.
3. Flush vs. Internal Diaphragms
Another essential consideration is whether you want a non-clogging, flush diaphragm, or an internal diaphragm.
The latter is characterized by a direct connection between the pressure medium and the sensor diaphragm. On the other hand, a flush diaphragm allows pressure ports to be sealed using an added stainless-steel diaphragm. In this case, the transmission fluid transmits pressure to the internal sensor diaphragm through the external diaphragm.
4. Threads and Seals
Choosing the right thread and seal combination will ensure efficient installation and sealing of the pressure gauge and the measurement location.
Depending on the sealing technique, the threads used can vary from self-sealing tapered threads or threads that require additional support with a gasket, o-ring, or seal. The most common approach is to seal the front of the thread using a metal ring.
5. Electrical Connection
Electrical connections for pressure gauges also come in a variety of options, including an integral cable or a standard plug-in connector. Choosing the right electrical connection is essential because it affects the ambient temperature range, aggressive media, IP (Ingress Protection) rating of the instrument, and environmental influences.
If you’re looking for reliable pressure gauges for oil rig operations, Contact Instruments is the leading provider of pressure sensors and pressure gaugesengineered specifically to facilitate operations in the O&G industry. Our products include single pointer pressure gauges, mud gauges,Type F standpipe pressure gauges, pressure deboosters, electronic gauges, compound pressure gauges, and dual manifold pressure systems.
For more information about our drilling rig instrumentation, contact us now.