Pepperl+Fuchs Blog

What is a Reduction Factor 1 Sensor?

Posted by David Rubinski on Tue, Dec 23, 2014

The reduction factor 1 or R1 sensor offers some real advantages over standard inductive sensor technology. It allows you to sense all metals without the effects of standard sensor reduction factors.

What is a reduction factor 1 sensor?Standard sensors limit the ability to detect nonferrous targets by reducing the effective sensing distance to these targets. Typical reductions in usable distance can be seen in the charts below.

Reduction factor 1 sensors and target materials
The charts show that standard sensor technology gives reduced sensing distance for nonferrous metals. As an example, a sensor with Sn = 12 mm (nominal sensing distance) will have a nominal distance of 12 mm to mild steel (ferrous target) but only a 4 mm nominal sensing distance for an aluminum target.

If you need maximum sensing distance to nonferrous metal targets, a reduction factor 1 sensor is better suited for the application.

Some typical examples of our line of reduction factor 1 sensors include our 18 mm diameter sensor NRB12-18GS40-E2-V1, the longest shielded sensing distance for 18 mm diameter housing.

With the long-range sensors, the mounting requirements are slightly different than for traditional flush mount sensors. These mounting conditions would be called quasi-flush mounting. In this case, the sensor cannot be completely flush mounted, but must have a small amount of the housing exposed beyond the mounting metal surface. In this example, it would be dimension A in the diagram below.

Mounting conditions for R1 sensorsFor unshielded sensors such as our NRN15-18GM50-E2-V1, you need to mount the sensor with the plastic cap completely exposed plus part of the sensor’s metal housing (A), as defined in the table.

Types of Reduction Factor 1 Sensors
So when using reduction factor 1 sensors, please make sure that you adhere to any special mounting conditions that uniquely apply to this family of long–range, all-metal-detecting sensors.

Reduction Factor 1 Sensor Questions?  Get the Quick Select Product Guide

Topics: Inductive Sensors

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