Corrosive substances are a danger with any materials that come into contact with harsh conditions.  Both metals and plastics are susceptible, and the corrosion literally eats away at the material causing a loss in functionality and productivity.

Effect on Pressure Sensors

Because pressure sensors are often used to measure a variety of substances, the likelihood of coming into contact with corrosive substances is high.  This can lead to both internal and external problems as a result of fumes or leaks.  The product’s body may be damaged, and the electronics and wiring may also be corroded.  By choosing your materials carefully and using the appropriate sensor for a given environment, you can limit the risk of corrosion on your equipment.

Areas of Concern

Any area of the sensor that comes into contact with a corrosive substance is at risk.  First, consider carefully the chemical composition of the given substance being measured and what effect with that substance have on the materials that are in use.  Second, be sure that you know exactly which parts of the equipment are going to come into contact with the substance, including pressure ports, o-rings, and cables.

Outside Influences

Some instruments are more susceptible to corrosion in extreme environments; furthermore, some substances will become more corrosive in those conditions as well.  Aggressive temperatures and extreme pressures can cause corrosion that would not have taken place in more ideal conditions.

What Can Be Done?

Choose your sensors carefully.  There are many different designs to choose from, and you should choose the sensor that can withstand the conditions in which it will be used.  Be sure to limit outside contaminants as well.  Some substances simply cannot be avoided, but limiting exposure to added moisture, air, or liquid can help.  Lastly, ensure that any repairs are made immediately.  If an area of corrosion is noticed early, it can be repaired before it becomes a more serious and widespread problem.