What types of sensors are resistant in chemically demanding environments with acids and alkalis?

Chemical environments can be devastating to most sensors. Acids and alkalis leave the average sensors corrode. How can accurate measurements under pressure be made in these? How can sensors and production processes be protected from this?
The advanced ultrasonic level measurement systems of the microsonic hps+ series operate without physical contact and are ideal for applications in wet chemical processes, especially in the food, electronics and PV industries.
Their exceptional resistance to high concentrations of acids and alkalis is due to the protective PTFE film over the ultrasonic diaphragm, resulting in reliable long-term performance. It is sealed with a special O-ring, made of FFKM, which is in contact with the housing made of stainless steel 1.4571 or PVDF. This achieves significant resistance to aggressive media.
The integration of the microsonic hps+ is effortless and efficient thanks to the widespread G1", G2" and GF process connection widely used in industry. These sensors maintain a high degree of measurement accuracy even when used with fluids exhibiting varying densities. This makes the ultrasonic level measurement systems suitable for a wide range of applications, including metering applications.
With the LinkControl it is easy it is to adjust the measurement range.
The LinkControl includes both the LinkControl adapter and the LinkControl software. This allows the hps+ sensors to be configured via a PC or laptop with all common Windows® system programs.
These ultra-resistant sensors can also be used for measurements in normal pressure conditions or in closed storage tanks and containers with a maximum internal pressure of 6 bar.
Sound spreads through the air. At lower air pressure, sound travels slower and over shorter distances. In a complete vacuum, no sound transmission even takes place. In an overpressure, where the hps+ shows its strength, sound actually spreads through the air faster and over greater distances. As a result, normal sensors, (if they survive the overpressure at all) transmit incorrect readings because their internal calculations are based on normal air pressure. The hps+ uses an internal calculation method that ensures that the measured distance is still accurate.
Modified filters also allow them to be used in conditions where containers are filled from above or where a stirring mechanism is present.
A 1″ or 2″ threaded flange is used for pressure-tight installation in a tank, depending on the hps+ model.
The most suitable choice for installation, with limited installation space and the use of immersion tubes in containers with many built-in elements is the pico+TF series.
As with all sensors in the hps+ series, the measuring range can be easily and conveniently adjusted with the PC programming tool TouchControl.
The PTFE film on the ultrasonic membrane provides protection to the sensor against chemicals and cleaning agents. The sensor housing, M22 x 1.5, has a protective PVDF sleeve.
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