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. 612-2229
Mfr. Part No.XX518A3PAM12
SGD269.87
Each
units
50 500 mm PNP-NO Barrel M18 x 1 300kHz 18 mm - 24V 12 24 V dc M12 - 4 Pin IP67 Plastic Yes Yes
RS Stock No. 764-0627
Mfr. Part No.XXV18B1NAL5
SGD148.18
Each
units
3 50 mm NPN-NO Barrel M18 x 1 360kHz 18 mm - 36V 12 24 V dc Cable IP67 Brass Yes Yes
RS Stock No. 612-2128
Mfr. Part No.XX630A3PCM12
SGD833.86
Each
units
300 → 8000 mm PNP-NO/NC Barrel M30 x 1.5 75kHz 30 mm - 24V 12 → 24 V dc M12 - 4 Pin IP67 Plastic Yes Yes
RS Stock No. 753-0508
Mfr. Part No.XX512A1KAM8
SGD357.95
Each
units
6 50 mm PNP/NPN-2NO Barrel M12 x 1 500kHz 12 mm - 24V 12 24 V dc M8 - 4 Pin IP67 Ultem Yes Yes
RS Stock No. 753-0545
Mfr. Part No.XX9V3A1C2M12
SGD340.92
Each
units
100 1000 mm Analogue Barrel M30 x 1.5 180kHz 30 mm - 24V 15 24 V dc M12 - 4 Pin IP67 Valox Yes Yes
RS Stock No. 764-0620
Mfr. Part No.XXV18B1NAL10
SGD157.15
Each
units
3 50 mm NPN-NO Barrel M18 x 1 360kHz 18 mm - 36V 12 24 V dc Cable IP67 Brass Yes Yes
RS Stock No. 742-0827
Mfr. Part No.XX630S1PCM12
SGD1,152.15
Each
units
50 → 1000 mm PNP-NO/NC Barrel M30 x 1.5 200kHz 30 mm - 24V 12 → 24 V dc M12 Connector IP67 Metal Yes Yes
RS Stock No. 816-7489
Mfr. Part No.VM18PNO
SGD194.95
Each
units
50 500 mm PNP-NO Barrel - - 18 mm - 24V 12 24 V dc Cable IP67 PBT - -
RS Stock No. 816-7476
Mfr. Part No.VM18PNOQ
SGD161.23
Each
units
50 500 mm PNP-NO Barrel - - 18 mm - 24V 12 24 V dc M12 Connector IP67 PBT - -
RS Stock No. 742-0928
Mfr. Part No.XX930A2A2M12
SGD436.53
Each
units
100 2000 mm Analogue Barrel M30 x 1.5 - - - - - M12 Connector IP65 Plastic Yes -
RS Stock No. 695-6858
Mfr. Part No.XX630A1KAM12
SGD685.41
Each
units
50 1000 mm 2x PNP/NPN-NO Barrel M30 x 1.5 200kHz 35 mm - 24V 12 24 V dc M12 - 4 Pin IP67 Plastic Yes Yes
RS Stock No. 742-0925
Mfr. Part No.XX630A2PCM12
SGD706.79
Each
units
100 → 2000 mm PNP-NO/NC Barrel M30 x 1.5 - 30 mm - 24V 12 → 24 V dc M12 - 4 Pin - - - -
RS Stock No. 612-2106
Mfr. Part No.XX630A1PCM12
SGD733.70
Each
units
50 → 1000 mm PNP-NO/NC Barrel M30 x 1.5 200kHz 35 mm - 24V 12 → 24 V dc M12 - 4 Pin IP67 Plastic Yes Yes
RS Stock No. 753-0542
Mfr. Part No.XX9V3A1F1M12
SGD344.16
Each
units
100 1000 mm Analogue Barrel M30 x 1.5 180kHz 30 mm - 24V 15 24 V dc M12 - 4 Pin IP67 Valox Yes Yes
RS Stock No. 612-2112
Mfr. Part No.XX930A3A2M12
SGD723.54
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. 612-2162
Mfr. Part No.XX930A3A1M12
SGD711.10
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. 764-0618
Mfr. Part No.XXV18B1NAL2
SGD143.30
Each
units
3 50 mm NPN-NO Barrel M18 x 1 360kHz 18 mm - 36V 12 24 V dc Cable IP67 Brass Yes Yes
RS Stock No. 674-2038
Mfr. Part No.XUVU06M3KSNM8
SGD441.89
Each
units
0 → 3 mm PNP/NPN-2NO/NC Block - - - - 30V 10 → 30 V dc M8 - 4 Pin IP65 Metal Yes Yes
RS Stock No. 177-8902
Mfr. Part No.XXS18S1PM12
SGD547.12
Each
units
100 → 1000 mm PNP-NO/NC Barrel M18 x 1 200kHz 18 mm - 30V 12 → 24 V dc M12 - 5 Pin IP65, IP67 Stainless Steel 316L Yes Yes
RS Stock No. 177-8894
Mfr. Part No.XXA18S1VM12
SGD783.92
Each
units
100 1000 mm Analogue Barrel M18 x 1 200kHz 18 mm 10V 30V 24 V dc M12 - 5 Pin IP65, IP67 Stainless Steel 316L Yes Yes