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MINI-BEAM Clear Plastic Detection Sensors
Datasheet
AC-operated or DC-operated Sensors for Clear Plastic Detection
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Senses the presence of clear plastic materials while ignoring all other materials
A highly reliable, cost-saving alternative to ultrasonic sensors
Applications include glass/plastic sorting and clear plastic web break detection
WARNING: Not To Be Used for Personnel Protection
Never use this device as a sensing device for personnel protection. Doing so could lead to serious injury or
death. This device does not include the self-checking redundant circuitry necessary to allow its use in
personnel safety applications. A sensor failure or malfunction can cause either an energized or de-energized
sensor output condition.
Models
1
Model
Range
0.3 m
Cable
Supply Voltage
10 V to 30 V dc
LED
Output
Sensing Mode
2 m (6.5 ft) 2-conductor
integral cable
SM31EPD
Visible red
Bipolar NPN/PNP
CLEAR PLASTIC
OPPOSED
2
SM31RPD
2 m (6.5 ft) 4-conductor
integral cable
SMA31EPD
2 m (6.5 ft) 2-conductor
integral cable
0.3 m
24 V to 240 V ac
Visible red
SPST Solid-state 2-Wire
3
SM2A31RPD
Overview
®
The Banner MINI-BEAM Clear Plastic Detection System consists of a special emitter and receiver with a unique optical
arrangement that actively detects the presence of clear plastic material in the beam. When clear plastic material is introduced,
there is a dramatic increase in the intensity of the light which reaches the receiver. As a result, clear plastic is reliably detected and
differentiated from all other materials.
The system uses a powerful modulated visible LED light source, which makes this sensing pair extremely forgiving of dirt buildup
and misalignment. The high contrast ratio that results from this sensing method (10 to 1 contrast or more) eliminates the need for
critical sensitivity adjustments.
These sensors detect most transparent plastics, whether clear or colored. However, there are a few materials that are not detected
due to their molecular structure (some acrylics, for example). This fact makes it possible to sort between some different types of
clear plastic materials. Evaluate material samples by sending them to Banner Engineering or through on-site testing by your local
Banner sales engineer.
Common applications include those involving manufacture or reclamation of plastic bottles and processing of clear plastic webs.
This system may also be used to inspect clear plastic containers for label, cap, or product presence. Because a light signal is
established through a container only when there is a missing item, there is usually no need for an interrogation scheme.
Each sensor comes with a stainless steel right-angle mounting bracket and hardware. These sensors have the same rugged,
epoxy-encapsulated design inherent in the entire MINI-BEAM sensor line.
1
Integral 2 m (6.5 ft) unterminated cable models are listed.
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To order a quick-disconnect (QD) model, add suffix "QD" to the model number. For example, SM31EPDQD.
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Models with a quick disconnect require a mating cordset.
2
3
Compatible only with DC emitter SM31EPD, due to response times.
Compatible with either the AC or DC emitter.
Original Document
03458 Rev. C
22 August 2018
03458