RayTek MI Miniature Infrared Sensor - Manual (Page 21)

Basics
MI 13
4.5 Electrical Interference
To minimize electrical or electromagnetic interference or “noise” be
aware of the following:
• Mount the unit as far away as possible from potential sources
of electrical interference such as motorized equipment
producing large step load changes.
• Use shielded wire for all input and output connections.
• Make sure the shield wires are earth grounded at one point.
• Sensor head shield braid should make direct contact around
the cable circumference.