Guide to choose right path

Selecting the right sensor materials is crucial to ensuring durability, performance, and chemical resistance in various applications. Whether you’re dealing with industrial process, medical equipment, or harsh environments, choosing the right sensor materials can make or break your project’s success. At SMD Sensors, we understand the importance of using the right materials for various applications. This blog will explore the factors influencing material selection and provide insights into chemical resistance for our sensors. 

Why Material Matters in Liquid Level Sensors? 

Why Material Matters in Liquid Level Sensors?

Liquid level sensors are exposed to various liquids, ranging from water to highly aggressive chemicals. A mismatch between the sensor material and the liquid can lead to corrosion, reduced sensor life, and even compromised safety. For this reason, the material must be carefully selected to ensure optimal performance and longevity. 

 

Key considerations for material selection include: 

  1. Chemical Composition of the Liquid: Understanding the liquid’s properties helps determine the compatibility of the sensor material.
  2. Environmental Conditions: Factors like temperature, pressure, and exposure to UV light can influence material performance. 
  3. Application Requirements: The choice of material also depends on the type of tank, the number of sensing points, and mounting specifications. 

SMD Sensors Materials: Tailored for Every Need 

At SMD Sensors, we offer liquid level sensors made from a range of materials to suit diverse applications. Below are the most common materials and their uses: 

  1. 316 Stainless Steel

  • Key Features: Highly durable and resistant to many liquids, making it ideal for general-purpose applications. 

Best For: Tanks containing water, oils, and certain chemicals with mild to moderate reactivity. 

  • Limitations: Not recommended for highly aggressive chemicals like strong acids or bases, which may cause corrosion over time. 

  1. Brass, Nylon, or PBT Stems with Buna-N Float

  • Key Features: Combines robust stem materials with superior buoyancy of Buna-N floats for reliable performance. 

Best For: Petroleum products, oils, and wastewater and Oil-water interface detection in tanks.

  • Advantages: Highly configurable to suit specific needs, offering long-lasting reliability in harsh environments. 

Waste Water

  1. General Use Plastics

Materials: Polypropylene, PVC, and Polycarbonate. 

Key Features: 

  • Temperature resistance up to 105°C. 
  • Cost-effective and adaptable for various applications. 

Best For: 

  • Acids and mild chemical applications. 
  • Food-safe environments and OEM projects. 

Advantages: Versatile and customizable for economic designs or with added features tailored for specific projects. 

Chemical Resistance Ratings: How to Choose the Right Material 

To simplify material selection, we’ve compiled a Chemical Compatibility Chart available in our resources section. This chart categorizes materials based on their resistance to various chemicals, using the following ratings: 

  • A (Excellent): No effect on the material, ensuring long-term performance. 
  • B (Good): Minor effects that do not significantly impact functionality. 
  • C (Fair): Moderate effects; not recommended for long-term use. 
  • D (Poor): Severe effects; not suitable for use. 

Example: 

  • For Acetic Anhydride: Polypropylene is rated “A,” while PVDF is rated “D.” 
  • For Carbon Tetrachloride: PVDF is rated “A,” while Polypropylene is rated “D.” 

chemical resistance

By using this chart, customers can easily identify the best material for their specific chemical environment. 

 

Custom-Configurable Sensors for Maximum Versatility 

Our FMCX line of chemical-use multi-level sensors are offered in Polypropylene(PP) or Polyvinylidene (PVDF), and designed to offer flexibility and customization. These sensors can be tailored to meet the unique requirements of your tank, including: 

  • Length: Adjust the size to fit your application. 
  • Number of Sensing Points: Determine how many floats are needed for precise measurement. 
  • Mounting Type: Choose a connection style that works best for your system. 

This level of customization ensures that you get a sensor that not only matches your application needs but also maximizes reliability. 

Check Here: FMCX Multi-Level: The Ultimate Solution for Aggressive Chemistry

 

Ensuring Long-Term Performance 

Selecting the right material is just the first step. To ensure your sensor performs optimally: 

  • Regularly inspect the sensor for signs of wear or corrosion. 
  • Review the chemical compatibility chart if the liquid composition changes. 
  • Consult with our experts for tailored advice on material selection and sensor configuration. 

 

Explore SMD Sensors Material Expertise 

At FSMD Sensors, we combine engineering excellence with material science to deliver sensors that meet your toughest challenges. Whether you’re dealing with mild liquids or highly aggressive chemicals, our sensors are built to last. 

Visit our Material Selection and Chemical Resistance Information page for a deeper dive into material compatibility and access the chemical compatibility chart. For further assistance, contact our team—we’re here to help you make the best choice for your application.