Intrinsically Safe Absolute Rotary Encoders

In the most hazardous environments, where an explosive atmosphere consisting of flammable gas or vapor is regularly present and a sensor fault cannot be risked, Intrinsically Safe (IS) sensors may be the best sensing option. Generally, these sensors are paired with a barrier which limits the amount of electrical and thermal energy that can enter the Hazardous Area to an amount that is so small that even in the situation of a sensor fault, there is not enough energy to cause an ignition.

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Expanded VLP Encoder Series Offers Control Engineers New Sensing Options

Everight Position is pleased to announce the addition of four new sizes of Netzer’s two-plate VLP rotary encoder amongst other improvements. Based on the success of the VLP-60 and VLP-100, the new options include the VLP-80, VLP-140, VLP-170 and VLP-247.

Accuracy, Resolution and Repeatability

There are several key terms that are critical to specifying the optimal position sensor for a given application. This application note defines these key terms and how they relate to the sensor’s role in the overall system performance. It is important to consider that precision is very much a system issue and can be dominated by mechanical errors such as eccentricity. This paper discusses the most significant mechanical error for rotary applications (eccentricity) and presents eccentricity tolerant position sensor solutions.