Chemical compatibility is critical when selecting level or pressure sensors to ensure safety, longevity, and performance. At Automation Products Group, Inc. (APG), we design our floats and probes with various materials tailored to specific environments. Selecting the wrong material can lead to catastrophic failures, including financial loss, injury, or even fatalities. It’s important to consider the materials of constructions as you choose your next level or pressure sensor. Let’s explore four key guidelines to help you navigate chemical compatibility and make informed choices for your application.
Stainless steel is highly versatile, making it ideal for applications involving non-corrosive substances like diesel fuel. For more demanding environments, titanium offers superior resistance to corrosive environments, including chloride solutions and seawater. This makes it perfect for saltwater and marine applications. However, be cautious when using these materials with strong acids or oxidizers, such as sulfuric acid, bromine, and phosphoric acid, as they can compromise sensor integrity.
Polypropylene and polyurethane are wonderful options for chemicals such as chloride and sodium hydroxide. However, these materials are less suitable for higher temperatures, or those with halogenated and aromatic hydrocarbons, such as fluorine, chlorine, benzene, and toluene. Always evaluate the specific chemical and temperature conditions to ensure optimal performance.
PVDF is a durable, chemically resistant material suitable for challenging applications involving aggressive chemicals. While it provides excellent protection and broad compatibility, it comes at a higher cost. This makes PVDF an investment for situations where reliability is non-negotiable.
Temperature is a critical factor in material selection. A material compatible with one temperature range may degrade in another. Sensors with metal materials like stainless steel and titanium generally handle higher temperatures conditions, whereas plastic may have limited thermal tolerance. Always confirm the operation temperature range of both the sensor and the chemical environment.
Applying these guidelines is straightforward. Start by identifying the exposed materials of your potential sensor, such as the transducer face, threads or body. Then, determine the chemicals—liquids, vapors, or solutions—your sensor will encounter. Finally, consult a chemical compatibility chart, such as APG’s, to cross-check material suitability. Our chart uses a clear rating system:
A: Excellent Compatibility
B: Good Compatibility
C: Moderate Effect
D: Severe Effect
N/A: No Data Available
Need help with chemical compatibility? At APG, our team has extensive experience across a wide range of applications and can guide you in selecting the best sensor materials for your needs. Contact us today to discuss your specific requirements or explore our detailed Chemical Compatibility Guide to find your match with confidence.
