As the primary element in sensing level signals, the Direct Replacement Conductivity Probes from HMA INSTRUMENTATION are the heart of electronic level indicating systems. Probes are manufactured from stainless steel, with high-purity ceramic insulators that exhibit a high degree of chemical inertness at elevated temperatures. Pressure sealing of the ceramic to metal body is achieved through a vacuum brazing process.
The braze joints are treated with a special gilding that protects it from the abrasive action of water. All probes are helium-leak tested, hydrostatically-tested at twice-rated pressure, and electrically-tested for correct resistance. All probes are guaranteed for 8 500 hours use in a controlled environment of pH7 to pH11. Conditions outside this range will affect the working life of the probe.