Miniature Ultrasonic Sensors with TEACH-Mode Programming
Features
• Fast, easy-to-use TEACH-Mode programming; no potentiometer adjustments
• Ultra-compact housing
• One discrete output: NPN or PNP, depending on model
• Two bi-colored status LEDs
• Rugged encapsulated version for harsh environments
• Choose 2 meter or 9 meter unterminated cable, 4-pin Euro-style or 4-pin Pico-style QD
connectors (either integral or with 150 mm pigtail)
• Wide operating range of -20° to +60° C (-13° to +140° F)
• Temperature compensation
• Configurable for normally open or normally closed operation
• Fast response time (15 milliseconds)
Models
Models Sensing
Range TEACH Option Cable Supply Voltage Output
QS18UNA
50 mm to
500 mm
(2 in to 20
in)
Integral push button or remote
TEACH (IP67, NEMA 6P) 4-wire, 2 m (6.5
ft) cable with
shield
12-30V dc
NPN
QS18UPA PNP
QS18UNAE Remote TEACH (epoxy-encapsula-
ted, IP68, NEMA 6P)
NPN
QS18UPAE PNP
Only standard 2 m (6.5 ft) cable models are listed. For 9 m (30 ft) shielded cable, add suffix “W/30” to the model number (e.g., QS18UNA
W/30). A model with a QD connector requires a mating cordset. For QD models:
• For 4-pin integral Euro-style QD, add suffix “Q8” (e.g., QS18UNAQ8).
• For 4-pin Euro-style 150 mm (6") pigtail QD, add suffix “Q5” (e.g., QS18UNAQ5).
• For 4-pin integral Pico-style QD, add suffix “Q7” (e.g., QS18UNAQ7).
• For 4-pin Pico-style 150 mm (6") pigtail QD, add suffix “Q” (e.g., QS18UNAQ).
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.
WORLD-BEAM QS18U Ultrasonic Sensors
P/N 119287 Rev. H 5/22/2013
0 119287 2
Principles of Operation
Ultrasonic sensors emit one or multiple pulses of ultrasonic energy, which travel through the air at the speed of sound. A portion of this
energy reflects off the target and travels back to the sensor. The sensor measures the total time required for the energy to reach the
target and return to the sensor. The distance to the object is then calculated using the following formula: D = ct ÷ 2
D = distance from the sensor to the target
c = speed of sound in air
t = transit time for the ultrasonic pulse
To improve accuracy, an ultrasonic sensor may average the results of several pulses before outputting a new value.
Temperature Effects
The speed of sound is dependent upon the composition, pressure and temperature of the gas in which it is traveling. For most ultrasonic
applications, the composition and pressure of the gas are relatively fixed, while the temperature may fluctuate.
In air, the speed of sound varies with temperature according to the following approximation:
In metric units:
Cm/s = 20 √273 + TC
In English units:
ft/s = 49 √460 + TF
C
Cm/s = speed of sound in meters per second Cft/s = speed of sound in feet per second
TC = temperature in °C TF = temperature in °F
Temperature Compensation
Changes in air temperature affect the speed of sound, which in turn affects the distance reading measured by the sensor. An increase in
air temperature shifts both sensing window limits closer to the sensor. Conversely, a decrease in air temperature shifts both limits farther
away from the sensor. This shift is approximately 3.5% of the limit distance for a 20° C change in temperature.
The QS18U series ultrasonic sensors are temperature compensated This reduces the error due to temperature by about 90%. The sen-
sor will maintain its window limits to within 1.8% over the -20° to +60° C (−4° to +140° F) range.
NOTE:
• Exposure to direct sunlight can affect the sensor’s ability to accurately compensate for changes in temper-
ature.
• If the sensor is measuring across a temperature gradient, the compensation will be less effective.
• The temperature warmup drift upon power-up is less than 7% of the sensing distance. After 5 minutes, the
apparent switchpoint will be within 0.6% of the actual position. After 25 minutes, the sensing position will
be stable.
Sensor Programming
Push Button
(IP67 models only)
Yellow/Red
TEACH/Output
Indicator LED
Green/Red
Power/Signal
Strength LED
Figure 1. Sensor Features
Two TEACH methods may be used to program the sensor:
• Teach individual minimum and maximum limits, or
• Use Auto-Window feature to center a sensing window around the taught position
The sensor may be programmed either via its push button, or via a remote switch. Remote
programming also may be used to disable the push button, preventing unauthorized per-
sonnel from adjusting the programming settings. To access this feature, connect the white
wire of the sensor to 0V dc, with a remote programming switch between the sensor and
the voltage.
Programming is accomplished by following the sequence of input pulses (see programming procedures). The duration of each pulse
(corresponding to a push button “click”), and the period between multiple pulses, are defined as “T: 0.04 seconds < T < 0.8 seconds."
WORLD-BEAM QS18U Ultrasonic Sensors
2 www.bannerengineering.com - tel: 763-544-3164 P/N 119287 Rev. H
Minimum
Operating
Range
Near
Setpoint
Far
Setpoint
Maximum
Operating
Range
Target
Target
Target
Target
Dead Zone
Output
Power Output
Power Output
Power
ON:
Green
OFF
Output
Power
OFF ON:
Green
ON:
Yellow
ON:
Green
OFF ON:
Red
OFF
Figure 2. TEACH Interface
Status Indicators
Power ON/OFF
LED
Indicates Output/Teach LED Indicates
OFF Power is OFF OFF Target is outside window limits (normally open opera-
tion).
ON Red Target is weak or outside sensing range. Yellow Target is within window limits (normally open opera-
ton).
ON Green Sensor is operating normally, good target. ON Red (solid) In Teach Mode, waiting for first limit.
ON Red (flashing) In Teach Mode, waiting for second limit.
WORLD-BEAM QS18U Ultrasonic Sensors
P/N 119287 Rev. H www.bannerengineering.com - tel: 763-544-3164 3
Teaching Minimum and Maximum Limits
General Notes on Programming
• The sensor returns to Run mode if the first TEACH condition is
not registered within 120 seconds.
• After the first limit is taught, the sensor remains in Program mode
until the TEACH sequence is finished.
• To exit Program mode without saving any changes, press and
hold the programming push button for more than 2 seconds (be-
fore teaching the second limit). The sensor reverts to the last
saved limits.
Output OFF Output ON Output OFF
Minimum
Limit
Maximum
Limit
Output ON Output ONOutput OFF
Minimum
Limit
Maximum
Limit
Normally Closed Operation
Normally Open Operation
Figure 3. Teaching independent minimum and maximum
limits
Procedure Result
Push Button (0.04 sec ≤ Click ≤ 0.8
sec)
Remote Line (0.04 sec < T < 0.8 sec)
Programming
Mode
Press and hold push button No action required; sensor is ready for 1st
limit teach
Output LED: ON Red
Power LED: ON Green (good signal) or
ON Red (no signal)
Teach First
Limit
Position the target for the first limit Position the target for the first limit Power LED: Must be ON Green
"Click" the push button Single-pulse the remote line
T
Teach Accepted
Output LED: Flashing Red
Teach Unacceptable
Output LED: ON Red
Teach Second
Limit
Position the target for the second limit Position the target for the second limit Power LED: Must be ON Green
"Click" the push button Single-pulse the remote line
T
Teach Accepted
Output LED: Yellow or OFF
Teach Unacceptable
Output LED: Flashing Red
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4 www.bannerengineering.com - tel: 763-544-3164 P/N 119287 Rev. H
Teaching Limits Using the Auto-Window Feature
Teaching the same limit twice automatically centers a 20 mm window on the
taught position.
General Notes on Programming
• The sensor returns to Run mode if the first TEACH condition is not regis-
tered within 120 seconds.
• After the first limit is taught, the sensor remains in Program mode until the
TEACH sequence is finished.
• To exit Program mode without saving any changes, press and hold the pro-
gramming push button for more than 2 seconds (before teaching the sec-
ond limit). The sensor reverts to the last saved program.
Output OFF Output ON Output OFF
Position
- 10 mm
Position
+ 10 mm
Position
- 10 mm
Taught Position
Output ON Output ON
Output OFF
Taught Position
Normally Closed Operation
Normally Open Operation
Position
+ 10 mm
Figure 4. Using the Auto-Window feature for pro-
gramming each output
Procedure Result
Push Button (0.04 sec ≤ Click ≤ 0.8
sec)
Remote Line (0.04 sec < T < 0.8 sec)
Programming
Mode
Press and hold push button No action required; sensor is ready for 1st
limit teach
Output LED: ON Red
Power LED: ON Green (good signal) or ON
Red (no signal)
Teach First
Limit
Position the target for the first limit Position the target for the center of the
window
Power LED: Must be ON Green
"Click" the push button Single-pulse the remote line
T
Teach Accepted
Output LED: Flashing Red
Teach Unacceptable
Output LED: ON Red
Re-Teach
Limit
Without moving the target, "click" the
push button again
Without moving the target, single-pulse
the remote line again
T
Teach Accepted
Output LED: Yellow or OFF
Teach Unacceptable
Output LED: Flashing Red
Figure 5. An application for the Auto-Window feature (retroflective mode)
WORLD-BEAM QS18U Ultrasonic Sensors
P/N 119287 Rev. H www.bannerengineering.com - tel: 763-544-3164 5
Normally Open/Normally Closed Operation Select
The sensor can be configured for either normally open or normally closed operation via the remote teach wire (white). A series of three
pulses on the line will toggle between normally open (NO) and normally closed (NC) operation. Normally open is defined as the output
energizing when the target is present. Normally closed is defined as the output energizing when the target is absent. (See Figure 3.
Teaching independent minimum and maximum limits on page 4 and Figure 4. Using the Auto-Window feature for programming each
output on page 5.)
Procedure Result
Push Button
0.04 sec ≤ Click ≤ 0.8 sec
Remote Line
0.04 sec < T < 0.8 sec
Toggle be-
tween NO/NC
Operation
Not available via push button Triple-pulse the remote line
T T
T
T
T
Either Normally Open or Normally
Closed operation is selected, depend-
ing on previous condition.
Push Button Lockout
Enables or disables the push button to prevent unauthorized personnel from adjusting the program settings.
Procedure Result
Push Button
0.04 seconds ≤ "Click" ≤ 0.8 seconds
Remote Line
0.04 sec < T < 0.8 sec
Push Button
Lockout
• Not available via push but-
ton
• Four-pulse the remote line
T T
TTT
T T
Push buttons are either enabled or
disabled, depending on condition.
Wiring
NPN (Sinking) Output Models PNP (Sourcing) Output Models
wh
shield
bn
bu
bk
12 - 30V dc
Load
Remote programming
switch (normally open)
wh
bn
bu
bk
12 - 30V dc
Load
Remote programming
switch (normally open)
shield
Cable and QD hookups are functionally identical.
It is recommended that the shield wire be connected to earth ground. Shielded cordsets are recommended for all QD models.
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6 www.bannerengineering.com - tel: 763-544-3164 P/N 119287 Rev. H
Specifications
Sensing Range
50 to 500 mm (2 to 20 inches)
Supply Voltage
12 - 30V dc (10% maximum ripple); 25 mA max (exclu-
sive of load)
Ultrasonic Frequency
300 kHz, rep. rate 7.5 ms
Supply Protection Circuitry
Protected against reverse polarity and transient voltag-
es
Output Configuration
SPST solid-state switch conducts when target is
sensed within sensing window; one NPN (current sink-
ing) or one PNP (current sourcing), depending on mod-
el.
Output Protection
Protected against short-circuit conditions
Output Rating
Rating: 100 mA maximum load; see Application Note 1
Off-state leakage current: less than 10 µA (sourcing);
less than 200 µA (sinking); see Application Note 2
ON-state saturation voltage: NPN: less than 1.6V @
100 mA; PNP: less than 3.0V @ 100 mA
Output Response
15 milliseconds
Delay at Power Up
300 milliseconds
Temperature Effect
Non-encapsulated models: ± 0.05% per °C from -20 to
+50 °C, ± 0.1% per °C from +50 to +60 °C
Encapsulated models: ± 0.05% per °C from 0 to +60
°C, ± 0.1% per °C from -20 to 0 °C
Repeatability
0.7 mm
Minimum Window Size
5 mm
Hysteresis
1.4 mm
Indicators
Range Indicator (Red/Green) and Teach/Output In-
dicator (Yellow/Red)
Range Indicator: Green - Target is within sensing
range; Red - Target is outside sensing range; OFF -
Sensing Power is OFF
Teach/Output Indicator: Yellow - Target is within
taught limits; OFF - Target is outside taught window
limits; Red - Sensor is in TEACH mode
Adjustments
Sensing Window Limits: TEACH-mode programming of
near and far window limits may be set using the push
button or remotely via TEACH input
Construction
ABS housing, TPE Push Button, ABS Push Button
housing, Polycarbonate lightpipes
Connections
2 m (6.5 ft) or 9 m (30 ft) 4-conductor PVC jacketed at-
tached cable, or 4-pin Euro-style integral QD (Q8), or
4-pin Pico-style integral QD (Q7), or 4-pin Euro-style
150 mm (6 in) pigtail QD (Q5), or 4-pin Pico-style 150
mm (6 in) pigtail QD (Q)
Environmental Rating
Leakproof design, rated NEMA 6P; IEC IP67 or IP68
depending on model; UL Type 1
Operating Conditions
Temperature: −20 to +60 °C (−4 to +140 °F)
Relative Humidity: 100% (non-condensing)
Vibration and Mechanical Shock
All models meet Mil. Std. 202F requirements method
201A (vibration: 10 to 60 Hz max., double amplitude
0.06", maximum acceleration 10G). Also meets IEC
947-5-2 requirements: 30G 11 ms duration, half sine
wave.
Temperature Warmup Drift
See Temperature Compensation on page 2
Application Notes
1. If supply voltage is > 24V dc, derate maximum out-
put current 5 mA/°C above 50°C.
2. NPN off-state leakage current is < 200 µA for load
resistances > 3 kΩ or optically isolated loads. For load
current of 100 mA, leakage is < 1% of load current.
3. Objects passing inside the specified near limit may
produce a false response.
Certifications
WORLD-BEAM QS18U Ultrasonic Sensors
P/N 119287 Rev. H www.bannerengineering.com - tel: 763-544-3164 7
QS18U Effective Beam Pattern (Typical) QS18U Maximum Target Rotation Angle
Lateral Distance (mm)
-20
-10
-30
-40
10
20
0
30
40
50
-50
0 200100 300 400 500
Sensing Distance (mm) 2.5 mm rod
8 mm rod
50 mm x 50 mm plate
Target Rotation
Sensing Distance (mm)
-5°
-10°
-15°
5°
0
10°
15°
0 100 200 300 400 500
Dimensions
Cabled Models Pico-Style QD Models Euro-Style QD Models
15.0 mm
(0.59")
33.5 mm
(1.32")
3 mm
(0.12")
17.1 mm
(0.67")
24.1 mm
(0.95")
35.0 mm
(1.38")
M18 x 1 Thread
Max. Torque 2.3 Nm (20 in-lbs)
ø 3.3 mm (0.13")
Max. Torque 0.6 Nm (5 in-lbs)
150 mm (6")
Pico-style
Pigtail
41.5 mm
(1.63")
Integral
4-pin
Pico-Style QD
150 mm (6")
Euro-style
Pigtail
49 mm
(1.93")
Integral
4-pin
Euro-Style QD
Locknut (included with all models) Washer (included with all models) M3 Hardware Packet Contents
8.0 mm
(0.32")
24.2 mm
(0.95")
1.6 mm
(0.06")
Ø 17.8 mm
(0.70")
Ø 23.9 mm
(0.94")
• 2 – M3 x 0.5 x 20 mm SS Screw
• 2 – M3 x 0.5 SS Hex Nut
• 2 – M3 SS Washer
WORLD-BEAM QS18U Ultrasonic Sensors
8 www.bannerengineering.com - tel: 763-544-3164 P/N 119287 Rev. H
Quick-Disconnect (QD) Cordsets
4-Pin Snap-On M8/Pico-Style Cordsets with Shield
Model Length Style Dimensions Pinout
PKG4S-2 2.00 m (6.56 ft) Straight
ø10 mm max.
(0.4")
28 mm max.
(1.1")
4
31
2
1 = Brown
2 = White
3 = Blue
4 = Black
PKW4ZS-2 2.00 m (6.56 ft) Right Angle
20 mm
(0.8")
25 mm max.
(1.0")
ø12 mm max.
(0.5")
4-Pin Threaded M12/Euro-Style Cordsets with Shield
Model Length Style Dimensions Pinout
MQDEC2-406 1.83 m (6 ft) Straight
44 Typ.
ø 14.5
M12 x 1
2
3
4
1
1 = Brown
2 = White
3 = Blue
4 = Black
MQDEC2-415 4.57 m (15 ft)
MQDEC2-430 9.14 m (30 ft)
MQDEC2-406RA 1.83 m (6 ft) Right-Angle
32 Typ.
[1.26"]
30 Typ.
[1.18"]
ø 14.5 [0.57"]
M12 x 1
MQDEC2-415RA 4.57 m (15 ft)
MQDEC2-430RA 9.14 m (30 ft)
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Mounting Brackets
All measurements are listed in millimeters.
SMB18A
• Right-angle mounting
bracket with a curved slot
for versatile orientation
• 12-ga. stainless steel
• 18 mm sensor mounting
hole
• Clearance for M4 (#8)
hardware
30
41
46
AB
C
Hole center spacing: A to B = 24.2
Hole size: A = ø 4.6, B = 17.0 × 4.6, C = ø 18.5
SMBQS18RA
• Right-angle mounting
bracket
• 14-ga. 304 stainless steel
42
17
32
A
B
Hole center spacing: A to B=20.3
Hole size: A =4.3 × 9.3, B=ø 4.3
SMB18SF
• 18 mm swivel bracket with
M18 × 1 internal thread
• Black thermoplastic polyester
• Stainless steel swivel locking
hardware included
B
A
51
42
25
Hole center spacing: A = 36.0
Hole size: A = ø 5.3, B = ø 18.0
SMB18UR
• 2-piece universal swivel
bracket
• 300 series stainless steel
• Stainless steel swivel lock-
ing hardware included
• Mounting hole for 18 mm
sensor
137
64 42
B
A
C
Hole center spacing: A = 25.4, B = 46.7
Hole size: B = 6.9 × 32.0, C = ø 18.3
Banner Engineering Corp Limited Warranty
Banner Engineering Corp. warrants its products to be free from defects in material and workmanship for one year following the date of
shipment. Banner Engineering Corp. will repair or replace, free of charge, any product of its manufacture which, at the time it is returned
to the factory, is found to have been defective during the warranty period. This warranty does not cover damage or liability for misuse,
abuse, or the improper application or installation of the Banner product.
THIS LIMITED WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES WHETHER EXPRESS OR IMPLIED (IN-
CLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE), AND
WHETHER ARISING UNDER COURSE OF PERFORMANCE, COURSE OF DEALING OR TRADE USAGE.
This Warranty is exclusive and limited to repair or, at the discretion of Banner Engineering Corp., replacement. IN NO EVENT SHALL
BANNER ENGINEERING CORP. BE LIABLE TO BUYER OR ANY OTHER PERSON OR ENTITY FOR ANY EXTRA COSTS, EXPEN-
SES, LOSSES, LOSS OF PROFITS, OR ANY INCIDENTAL, CONSEQUENTIAL OR SPECIAL DAMAGES RESULTING FROM ANY
PRODUCT DEFECT OR FROM THE USE OR INABILITY TO USE THE PRODUCT, WHETHER ARISING IN CONTRACT OR WAR-
RANTY, STATUTE, TORT, STRICT LIABILITY, NEGLIGENCE, OR OTHERWISE.
Banner Engineering Corp. reserves the right to change, modify or improve the design of the product without assuming any obligations or
liabilities relating to any product previously manufactured by Banner Engineering Corp.
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