Datalogic SG4 BASE - How to Choose the Device; Detection Capability

SG4 BASE
9/73
1.4 HOW TO CHOOSE THE DEVICE
There are at least three different main characteristics that should be considered when choosing a safety light
curtain, after having evaluated the risk assessment.
1.4.1 Detection capability
The detection capability (or resolution) of the device is the minimum diameter that an opaque object must have in
order to obscure at least one of the beams that constitute the detection zone and to actuate the sensing device.
The resolution is related to the part of the body to be protected.
R=14 mm Finger protection
R=30 mm Hand protection
As shown in Fig 1 - page 9, the resolution only depends on the geometrical characteristics of the lenses, diameter
and distance between centres, and is independent of any environmental and operating conditions of the safety light
curtain.
Fig 1 - Detection capability
The resolution value is obtained applying the following formula:
R = I + d
where:
I=Interaxes between two adjacent optics
d=Lens diameter