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 Communication Protocol Maximum AC Voltage Maximum DC Voltage Supply Voltage Terminal Type IP Rating Housing Material Reverse Polarity Protection
RS Stock No. 764-0598
Mfr. Part No.XXV18B1PAL2
$206.55
Each
units
3 → 50 mm PNP-NO Barrel M18 x 1 360kHz 18 mm - - 36V 12 → 24 V dc Cable IP67 Brass Yes
RS Stock No. 850-3046
Mfr. Part No.S18UIAQ
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$550.21
Each
units
30 → 300 mm Analogue Barrel M18 x 1 - 18 mm - - 30V 10 → 30 V dc M12 - 5 Pin IP67 Thermoplastic Polyester Yes
RS Stock No. 816-7498
Mfr. Part No.VM18NNO
$265.83
Each
units
50 → 500 mm NPN-NO Barrel - - 18 mm - - 24V 12 → 24 V dc Cable IP67 PBT -
RS Stock No. 177-8886
Mfr. Part No.XXA18B1AM12
$730.59
Each
units
100 → 1000 mm Analogue Barrel M18 x 1 200kHz 18 mm - - 30V 12 → 24 V dc M12 - 5 Pin IP65, IP67 Brass Yes
RS Stock No. 123-2466
Mfr. Part No.UGT582
$351.33
Each
units
60 → 800 mm Analogue, PNP-NO/NC Block M18 x 1 230kHz - - - 30V 10 → 30 V dc M12 - 4 Pin IP67 Epoxy Glass Ceramic, PBT, Polyamide, Stainless Steel Yes
RS Stock No. 610-5779
Mfr. Part No.3RG6115-3BF00
$1,142.00
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. 848-7174
Mfr. Part No.QS18UPAQ5
BrandBanner
$345.23
Each
units
50 → 500 mm PNP-NO Block M18 x 1 - - - - 30V 12 → 30 V dc M12 - 4 Pin IP67 ABS Yes
RS Stock No. 848-7168
Mfr. Part No.QS18UNAQ8
BrandBanner
$297.85
Each
units
50 → 500 mm NPN-NO Block M18 x 1 - - - - 30V 12 → 30 V dc M12 - 4 Pin IP67 ABS Yes
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