T18SN6R

Manufacturer Part NumberT18SN6R
DescriptionPhotoelectric Sensor
ManufacturerBANNER ENGINEERING
TypeOpposed Mode
T18SN6R datasheets
 

Specifications of T18SN6R

Output Current150mASensor OutputNPN
Supply Voltage Range Dc10V To 30VSensor InputOptical
Output TypeTransistorSensing Range Max20m
Contact Current Max150mASwitch TerminalsCable
Brand/seriesT18Current, Consumption20 mA
Current, Leakage1 μA (Max.) @ 30 VDC (OFF-State)Current, Switching150 mA
Ip RatingIP69KLight SourceInfrared LED, 950 nm
Material, HousingPolycarbonateMaterial, LensAcrylic
Mounting TypeThreadedOutputNPN
Primary TypePhotoelectricRange, Measurement20 mm
Response Time3 ms (ON), 1.5 ms (OFF)Sensing ModeOpposed
StandardsUL Listed, CE Marked, CSA CertifiedTechnologyPhotoelectric
Temperature, Operating-40 to +70 °CTerminationCable
Voltage, Supply30 VDCAccessories AvailableCordsets, Brackets and Reflectors
Lead Free Status / Rohs StatusRoHS Exempt Product  
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Banner Engineering Corp. • Minneapolis, MN U.S.A
www.bannerengineering.com • Tel: 763.544.3164
T18 Sensors — dc-Voltage Series
The object then reflects the R1 and R2 fields equally, resulting in no false triggering. A better
solution, if possible, may be to reposition the object or the sensor.
Color Sensitivity
The effects of object reflectivity on cutoff distance, though small, may be important for some
applications. It is expected that at any given cutoff setting, the actual cutoff distance for lower
reflectance targets will be slightly shorter than for higher reflectance targets (see Figure-of-
Merit information on page 5). This behavior is known as color sensitivity.
For example, an excess gain of 1 (see page 5) for an object that reflects 1/10 as much light as
the 90% white card is represented by the horizontal graph line at excess gain = 10. An object
of this reflectivity results in a far limit cutoff of approximately 20 mm (0.8"), for the 25 mm (1")
cutoff model for example; thus 20 mm represents the cutoff for this sensor and target.
These excess gain curves were generated using a white test card of 90% reflectance.
Objects with reflectivity of less than 90% reflect less light back to the sensor, and thus
require proportionately more excess gain in order to be sensed with the same reliability as
more reflective objects. When sensing an object of very low reflectivity, it may be especially
important to sense it at or near the distance of maximum excess gain.
R1 = Near Detector
R2 = Far Detector
Cutoff
E
= Emitter
Distance
Reflective
Background
T18FF
Strong
Direct
Reflection
R1
to R1
R2
Core of
E
Emitted
Beam
Fixed
Sensing
Field
Figure 3. Reflective background – problem
T18FF
Cutoff
Distance
R1
R2
E
Fixed
Sensing
Field
Reflective
Surface
or
R1 = Near Detector
Moving Object
R2 = Far Detector
E
= Emitter
A reflective background object in this position or
moving across the sensor face in this axis and
direction may cause false sensor response.
Figure 5. Object beyond cutoff – problem
Cutoff
Distance
Fixed Sensing
Reflective
Field
Background
T18FF
R1
R2
Core of
Emitted
E
Beam
Strong
Direct
Reflection
Away
From Sensor
R1 = Near Detector
R2 = Far Detector
E
= Emitter
Figure 4. Reflective background – solution
Cutoff
T18FF
Distance
R1, R2, E
Fixed
Sensing
R1 = Near Detector
Reflective
Field
R2 = Far Detector
Surface
E
= Emitter
or
Moving Object
A reflective background object in this position or
moving across the sensor face in this axis will be
ignored.
Figure 6. Object beyond cutoff – solution
P/N 121526 rev. A
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