100 Questions About Tuning Fork Level Switches-Part 7 | Temperature, pressure, explosion-proof 61–70

61.What Is the Maximum Temperature of a Tuning Fork Level Switch?
Standard tuning fork level switches typically handle media temperatures from -40°C up to 150°C. High-temperature customized versions can reach up to 250°C. The actual limit depends on wetted materials, seal structure and sensor design.
62.Can a Tuning Fork Level Switch Be Used for High-Temperature Applications?
Yes. Special high-temperature models with high-temperature gaskets and heat isolation structures are available for hot liquids, molten materials and high-temperature powder silos. Verify temperature rating before selection.
63.What Is the Maximum Operating Pressure?
Standard threaded models usually support up to 16 bar. Flanged heavy-duty versions can withstand higher pressure up to 40 bar or more, subject to flange class and probe construction.
64.Can It Be Used in Pressurized Tanks?
Yes. Pressure-rated tuning fork switches work reliably inside pressurized vessels. You need to match the process connection and pressure rating with your tank design.
65.Can It Be Used in Vacuum Tanks?
Yes. Properly sealed tuning fork level switches are suitable for vacuum conditions. Low absolute pressure will not interfere with the vibration detection principle, but sealing materials must be vacuum compatible.
66.Can It Be Used in Hazardous Areas?
Yes. Explosion-proof tuning fork level switches with ATEX, IECEx or local explosion certificates are designed for flammable liquids, solvents and combustible dust hazardous zones.
67.What Is an ATEX Tuning Fork Level Switch?
An ATEX tuning fork level switch is certified to meet EU ATEX directives for explosive atmospheres. It can be installed in hazardous zones within the European market.
68.What Is an IECEx Tuning Fork Level Switch?
An IECEx tuning fork level switch complies with international IECEx explosion protection standards. The certification is globally recognized and accepted in many countries outside Europe.
69.What Is the Difference Between ATEX and IECEx?
ATEX is the mandatory EU certification for explosive areas, required for equipment sold in Europe. IECEx is an international standard certification, serving as a global passport for hazardous area products. IECEx often helps accelerate local approval in many regions, while ATEX is the legal requirement for EU market access.
70.How Do You Select a Tuning Fork Level Switch for Explosion-Proof Applications?
     ·Confirm the hazard type: flammable gas or combustible dust.
     ·Identify the zone classification (Zone 0/1/2 for gas, Zone 20/21/22 for dust).
     ·Select the correct explosion protection type (intrinsic safety, flameproof).
     ·Check temperature class T rating for your process media.
     ·Pick certified products with valid ATEX / IECEx certificates.