Dust Environment Sensors

Positek supplies a selection of high-performance, intrinsically safe position sensors that are ideal for environments exposed to explosive and combustible dust.

Our products are available with the following certifications:

    •   ATEX approval
    •   IECEx approval
    •   CSA approva

Food production, chemical manufacturing and metal processing are just a handful of the applications within which a dust explosion could occur. Any workplace that generates dust is potentially at risk and must therefore meet the necessary dust explosion classification standards. 

When using the correct hazardous area equipment however, such as an intrinsically safe industrial position sensor, the flow of electrical energy into a hazardous area is restricted. This ensures any sparks that may occur as a result of an electrical failure are insignificant to cause ignition, and the threat of a dust explosion is eliminated.

Click here to find a dust environment linear sensor

Click here for ATEX/IECEx Approved Galvanically Isolated Amplifiers

Click here for CSA Approved Galvanically Isolated Amplifiers

Harsh and hazardous environments come in many forms for industrial equipment and can place heavy demands on linear sensors. One of these is an area that contains explosive dusts and gases. Electrical control equipment like linear sensors can break down like any other machine. In fact, more than 80 percent of failures are electrical in nature. That’s why it is essential to get intrinsically safe linear sensors which are guaranteed to be safe in dust environments.

In what circumstances may position sensors be exposed to dust?

Metal processing plants, chemical manufacturing areas and food production sites are only some areas where linear sensors are deployed. These can be as hazardous as oil exploration rigs, gas utility plants, sewage treatment plants, and large-scale dry-cleaning operations in terms of containing flammable or combustible material.

Why can dust be hazardous when position sensors are involved?

Linear position sensors, as electro-mechanical devices, carry with them the risk of creating sparks that can ignite particles like dust. Non-intrinsically safe linear sensors like the LVDTs can have input voltage ranges of 8.5 to 30 V. They are able to produce large voltage outputs that can produce sparks that can be catalysts for disaster. Linear sensors normally require Ingress Protection Ratings in the form of the IP System established by the International Electrotechnical Commission (IEC). This system classifies how well a device is protected against infiltration by foreign materials like dust. Hermetically-sealed LVDTs have a rating of IP 68 and are made of stainless steel, incorporating coil winding that is sealed against hostile environments

How do intrinsically safe linear sensors minimize safety risk in a dust environment?

The Positek intrinsically safe linear sensors are one of the safest in the industry because they limit the electrical energy. The electrical energy is too low to create a spark even under fault conditions, resulting in a much safer environment. Intrinsically safe linear sensors are the safest option in explosive environments because they don’t require housing in explosion proof boxes. They are ATEX and IECEx approved and meet the necessary dust explosion classification standards.

The intrinsically safe linear sensors found in www.positek.com like the E100 Cylinder Position Sensor are IP67 rated and are suitable for monitoring outdoor structures, valve positioning, heavy industrial tasks, and sensing applications in environments with dust, dirt, grease, and humidity. These function in machinery in the form of precision gauging, dials and indicators, and position feedback for robotic actuators.

Our range of ATEX, IECEx and CSA approved sensors are therefore ideal for use in applications that are subject to the production of combustible dust. 

Not only do they meet the necessary hazardous area classification requirements, they also offer all of the benefits of an lvdt sensor, but with added reliability. As with every product that we manufacture, our dust protection sensors employ contactless technology, and operate without wear or interference even in the harshest environments. 

In order to mitigate the risks associated with combustible dust and to fully eliminate any dust hazards, our sensors must be used in conjunction with a galvanically isolated amplifier. 

Click here to browse our full range of explosive dust protection sensors. If our standard measurements are not suitable, we can customise any sensor within our range to meet your requirements.

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