---
title: How much distance must be maintained between data carriers and BIS M-4008-048-0xx-ST4 processors?
description: Distance to be maintained between Data Carriers and the BIS M-4008-048-0xx-ST4
---

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# How much distance must be maintained between data carriers and BIS M-4008-048-0xx-ST4 processors?

## Distance to be maintained between Data Carriers and the BIS M-4008-048-0xx-ST4

When installing two BIS M-4\_ \_-... on metal, there is normally no mutual interference.

Un favorable use of a metal frame can result in problems when reading a data carrier.

In this case, the read distance is reduced to 80% of the maximum value.

In critical applications, a pre-test is recommended.

 

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