Ultrasonic Proximity Sensors

Ultrasonic proximity sensors are a type of non-contact sensor. They use transmitted or reflected ultrasonic waves to detect whether an object or material is present or absent. They are reliable and versatile and can be used reliably in almost all conditions.

How do they work?
These sensors work by emitting a short bust of ultrasonic sound at a specific frequency towards the target. When the target reflects the sound back to the sensor, the sensor measures the time it takes for the echo to return. The sensor will use the time it takes the soundwave to travel back to calculate the distance between the sensor and the object.

What are they used for?
Typical applications for these ultrasonic sensors include stacking height control, irregular part detection within hoppers and feeder bowls, automotive assembly and loop control. Other suitable applications include thread or wire break detection, robotic sensing, detection of people for counting and liquid level control.

Things to consider
When deciding which sensor you should choose, there are a few things that you should bear in mind. Ultrasonic proximity sensors can be affected by noise interference and some will have a blind zone at close proximity. The surface angle of the target, and the roughness of the target surface can also affect the sensor. Some materials such as cloth or carpeting can absorb soundwaves rather than reflecting them. The speed of sound can be affected by temperature and humidity which can impact the resolution and accuracy of the sensor.

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Description Price Detection Range Output Type Body Style Thread Size Transducer Frequency Diameter Maximum AC Voltage Maximum DC Voltage Supply Voltage Terminal Type IP Rating Housing Material Reverse Polarity Protection Short Circuit Overload Protection
RS Stock No. 166-9497
BrandRS PRO
$13.874
Each (In a Box of 540)
units
0 → 300 mm - Barrel - 40kHz 10 mm - - 20 V PCB - - - -
RS Stock No. 237-0799
BrandRS PRO
$14.79
Each
units
0.2 → 4 m - Barrel - 40kHz 10 mm - - 20 V PCB - - - -
RS Stock No. 166-9496
BrandRS PRO
$13.874
Each (In a Box of 540)
units
0 → 300 mm - Barrel - 40kHz 10 mm - - 20 V PCB - - - -
RS Stock No. 237-0783
BrandRS PRO
$14.85
Each
units
0.2 → 4 m - Barrel - 40kHz 10 mm - - 20 V PCB - - - -
RS Stock No. 700-2858
Mfr. Part No.UM30-213111
BrandSick
$516.12
Each
units
200 → 1300 mm PNP-NO/NC Barrel M30 x 1.5 200kHz 30 mm - 30V 9 → 30 V dc M12 - 5 Pin IP67 Nickel Plated Brass Yes Yes
RS Stock No. 784-6718
Mfr. Part No.UM30-213113
BrandSick
$891.99
Each
units
2000 mm Analogue Barrel M30 x 1.5 200kHz 30 mm - 30V 9 → 30 V dc M12 - 5 Pin IP67 Nickel Plated Brass Yes Yes
RS Stock No. 399-5478
Mfr. Part No.UC500-30GM-E6R2-V15
$973.11
Each
units
30 → 500 mm PNP-2NO/NC Barrel M30 x 1.5 380kHz 30 mm - 30V 10 → 30 V dc M12 - 5 Pin IP65 PBT - Yes
RS Stock No. 338-9930
Mfr. Part No.UNDK 30U6103/S14
BrandBaumer
$1,162.85
Each
units
100 → 1000 mm Analogue Block - 240kHz - - 30V 15 → 30 V dc M12 Connector IP67 Die Cast Zinc Yes Yes
RS Stock No. 612-2112
Mfr. Part No.XX930A3A2M12
$1,212.05
Each
units
300 → 8000 mm Analogue Barrel M30 x 1.5 75kHz 30 mm - 24V 15 → 24 V dc M12 - 4 Pin IP65 Plastic Yes Yes
RS Stock No. 773-7333
Mfr. Part No.UB250-F77-E2-V31
$301.89
Each
units
20 → 250 mm PNP-NO Block M8 x 1 400kHz - - 30V 20 → 30 V dc M8 - 4 Pin IP67 Polycarbonate - Yes
RS Stock No. 303-5150
Mfr. Part No.UNAM 18P1703
BrandBaumer
$586.44
Each
units
100 → 700 mm PNP-NO Barrel M18 x 1 240kHz 18 mm - 30V 12 → 30 V dc M12 Connector IP67 Nickel Plated Brass Yes Yes
RS Stock No. 816-7476
Mfr. Part No.VM18PNOQ
$210.02
Each
units
50 → 500 mm PNP-NO Barrel - - 18 mm - 24V 12 → 24 V dc M12 Connector IP67 PBT - -
RS Stock No. 700-2854
Mfr. Part No.UM30-212111
BrandSick
$516.12
Each
units
60 → 350 mm PNP-NO/NC Barrel M30 x 1.5 400kHz 30 mm - 30V 9 → 30 V dc M12 - 5 Pin IP67 Nickel Plated Brass Yes Yes
RS Stock No. 610-5808
Mfr. Part No.3RG6243-3PB00
$417.72
Each
units
5 → 150 mm PNP-NO Block - 200kHz - - 30V 20 → 30 V dc M12 Connector IP65 PBT - -
RS Stock No. 814-1102
Mfr. Part No.BUS M30M1-PPX-20/130-S92K
BrandBALLUFF
$320.87
Each
units
200 → 2000 mm PNP-NO/NC Barrel M30 x 1.5 200kHz - - 30V 9 → 30 V dc M12 Connector, M30 Connector IP67 Brass, PBT, TPU Yes -
RS Stock No. 814-1134
Mfr. Part No.BUS R06K1-PPX-12/070-S75G
BrandBALLUFF
$418.26
Each
units
120 → 1000 mm PNP-NO/NC Block - 300kHz - - 30V 20 → 30 V dc M8 Connector IP67 Messing, PBT Yes -
RS Stock No. 700-2889
Mfr. Part No.UM30-213112
BrandSick
$779.79
Each
units
200 → 1300 mm PNP-NO/NC Barrel M30 x 1.5 200kHz 30 mm - 30V 9 → 30 V dc M12 - 5 Pin IP67 Nickel Plated Brass Yes Yes
RS Stock No. 610-5779
Mfr. Part No.3RG6115-3BF00
$1,193.81
Each
units
400 → 3000 mm Analogue, PNP-NO Barrel M30 x 1.5 120kHz 48 mm - 30V 12 → 30 V dc M12 - 5 Pin IP65 Nickel Plated Brass - -
RS Stock No. 773-7330
Mfr. Part No.UBR250-F77-E2-V31
$311.88
Each
units
0 → 250 mm PNP-NO Block M8 x 1 400kHz - - 30V 20 → 30 V dc M8 - 4 Pin IP67 Polycarbonate - Yes
RS Stock No. 610-5791
Mfr. Part No.3RG6243-3NN00-PF
$373.39
Each
units
5 → 150 mm PNP-NO/NC Block - 200kHz - - 30V 20 → 30 V dc M12 Connector IP65 PBT - -
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