Monthly Archives: July 2016

Corrosion Resistance of Validyne Pressure Transducers

Pressure transducers are exposed to a wide variety of fluids and gases when used to measure pressure.  Corrosion of the pressure transducer sensor body will shorten service life and lead to costly downtime if material selection is not carefully considered.  This article will cover the basics of material selection for Validyne pressure transducers so that the best possible performance and adequate corrosion protection can be ensured prior to purchase.

Validyne offers three types of sensor body materials that will provide appropriate protection for most pressure measurement applications: 410 SS, 316 SS and Inconel.  316 SS and Inconel pressure transducers are supplied with a teflon-coated 410 SS sensing diaphragm needed for the Validyne inductive sensing technology to operate correctly.

410 SS

410 is the standard material for Validyne transducers and does best when used with air, inert gases, or hydrocarbon-based fluids.  Oxidizing environments – or fluids containing chlorides – will cause 410 SS to corrode and pit, sometimes rapidly.  Water-based fluids, fluids containing salts, or corrosive chemicals should not be used with 410 SS.

Validyne offers the P365 High Pressure Transducer and the P368 Digital High Pressure Transducer with the 410 SS option.

316 SS

316 SS is the standard steel for instrumentation and has a high degree of resistance to water-based fluids and mildly corrosive chemicals.  316 SS also does well in fluids with low concentrations of chlorides, but is attacked by nonoxidizing acids such as sulfuric and hydrochloric acid in most concentrations.  316 SS has good resistance to alkaline solutions, organic acids, and other organic compounds.

Validyne offers a wide range of pressure sensors and pressure transducers with 316 SS.  The DP15 Variable Reluctance Pressure Sensor Capable of Range Changes, P55 Pressure Transducer and P61 USB Pressure Transducer are some of the pressure transducers that can be ordered in 316 SS option.

Inconel

inconel pressure transducers

Inconel is a superior material, ideal for corrosive applications, and is best reserved for systems containing high concentrations of chlorides such as salt water or brine.

Validyne offers a full range of pressure sensors and transducers in inconel. From low-static pressure transducers to high-static pressure transducers, we offer the DP15 Variable Reluctance Pressure Sensor Capable of Range Changes, P55 Pressure TransducerP61 USB Pressure TransducerP365 High Pressure Transducer and the P368 Digital High Pressure Transducer.

Fluids to Avoid

Fluids containing hydrogen or hydrogen sulfide should not be allowed to come in contact with Validyne transducers. Almost all metals lose ductility when they absorb hydrogen, especially at temperatures below 100 °C. Hydrogen molecules can enter the sensor body metals at the grain edges and this will cause embrittlement of the metal that can lead to pressure boundary failure.  Additionally, hydrogen sulfide is poisonous and hydrogen gas is extremely explosive.

Corrosion of Validyne transducers is not covered by the warranty. The proper choice of sensor body material will enhance pressure transducer performance and increase the life of the pressure transducers.

Click here to contact us today to find out the different solutions we can provide for your pressure measurement application. 

Differential Pressure Transducer

What to Look for in Durable Differential Pressure Transducers?

At Validyne Engineering, we have almost half a century in the industry, providing a range of different low cost, highly accurate pressure sensors for many different industries and applications. Over time, we have provided these sensors to various industries and companies. We have also listened to the needs of our customers to develop the sensors, transducers and transducers to get the job done.

One of the most important aspects of our devices is quality. We produce a durable, rugged line of differential pressure transducers. We believe we have a top selection of these transducers for all industries and applications.

The Validyne Difference

All of our differential pressure transducers are designed to meet performance specifications in highly demanding environments. Most of the transducers we sell can be used for both liquids and gases. They have been extensively used in the field with test vehicles and aircraft as well as in all types of environmental conditions.

Our in-house team of designers and engineers, all with extensive experience in sensor component development and design, has the ability to incorporate the needs of our customers into specialized solutions for their applications. We are also able to take this knowledge and design transducers for general use that are superior to other designs on the market today.

Up to the Test

One of the biggest complaints we hear from people looking for transducers is their inability to survive difficult working conditions. Each of our components has been thoroughly tested to provide our end-users with the quality part to stand up to real-world use. We also provide support and assistance in helping you to choose the right component for any application.

Our transducers are able to handle changes in the environmental and ambient temperatures with minimal impact on the accuracy of the pressure readings. They are designed to provide precise readings with fast response, giving test engineers the data they require. Fully compatible with data management systems, they are easy to integrate into field or laboratory testing situations or where and as they are needed.

Easy to mount with pre-drilled holes, they have a small, compact size and low weight make these differential pressure transducers the right component for the job. They are able to stand up to spray and moisture and also capable of wet-wet operations. Our transducers are available in differential or absolute pressure, as well as the option for a CE approved model if so required.