Chemicals can be disastrous for your sensors. Corrosion is one of those risks. How can you protest your sensors and production process against this? Switch to sensors with a chemical resistance!

The manufacturing industry works with all kinds of chemicals on a daily basis. Industrial applications where these chemicals are present require extra attention. With this in mind, it is important to realise that average or regular sensors can be unfit to operate with these chemicals. But, it can be crucial to have a sensor in these applications. That's where sensors with chemical resistance come in.

In this article we discuss a number of sensors that are equipped with a chemical resistance.

PAY ATTENTION! With each application and situation the chemical reaction as well as the functionality of the sensors could be diverse. That is why we always recommend not to act without the supervision and consultation of a qualified expert.

Sensors with a chemical resistance

Sensors, and also all related products have to be choosen carefully for proper use. This means having a well-thought look at sensors, cables and accessories since corrosion is a real risk with some chemicals. To make sensors operable despite these chemicals, there are special materials and housings put to use. Have a look at the sensors with chemical resistance below:

Ultrasonic sensors in stainless steel housing

microsonic provides a numer of series specifically designed for use in environments that contain (corrosive) chemicals. Firstly, there is the crm+ series which is an altered version of the mic+ and is equipped with a stainless steel housing and a teflon film over the transducer. The pico+TF series is a special version of the regular pico+ series in that it has a plastic housing and a teflon film over the transducer. In addition, there is the hps+ series which, in addition to chemical resstiance, is also equipped with a special pressure resistance that allows reliable measurements in a tank with changing (air) pressure. More about it here.

De hps-340 van microsonic is een ultrasoon sensor met chemische bestendigheid

Inductive proximity switch in 316 stainless steel housing

De FullMetal serie van MicroDetectors voor chemische bestendigheid en bestendigheid voor sensoren in druk

Inductive proximity switches from the FME/FMM/FMK/FMT series of Micro Detectors are equipped with a full-metal housing (316L stainless steel) which provides a raised chemical resistance. In addition, these sensors have an impact resistance and IP68/IP69K sealing degree.

Laser distance sensors in Ex d housing

The laser distance sensors from the LAM series are equipped with an ATEX-compliant Ex d housing of 316L stainless steel. It is not only chemical-resistant to a certain degree (see the table below this article) but also prevents that the laser from becoming a source of ignition in an atmosphere with risk of explosion caused by the presence of gas and dust.

Photoelectric sensors in plastic and stainless steel housings

The photoelectric sensors from the SM9000 series from Telco Sensors are equipped with a 316 stainless steel housing as well, allowing them to be used in environments with a greater challenge due to the presence of chemical substances. Other photoelectric sensors have a housing made of different types of plastics with different chemical resistances, which are explained in the table below.

Machine safety components in different housings

Trapped key interlocks from Haake Technik provide a mechanical safety that is made of AISI 316 stainless steel. The remaining safety components such as safety bumpers and edges are, on request, available for your application!

Key for Haake HST Trapped Key Interlock Systems

Connection cables with chemical resistance

Cables come in different shapes, sizes, connections and materials. There are types of cables made of PUR (polyurethane) and TPE (thermoplastic elastomer), each of which has its own chemical resistance. 

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