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. 848-7155
Mfr. Part No.QS18UNA
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MYR955.98
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units
50 → 500 mm NPN-NO Block - - - - - 30V 12 → 30 V dc Cable IP67 ABS Yes
RS Stock No. 848-7177
Mfr. Part No.QS18UPAQ8
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MYR693.90
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units
50 → 500 mm PNP-NO Block M18 x 1 - - - - 30V 12 → 30 V dc M12 - 4 Pin IP67 ABS Yes
RS Stock No. 848-7161
Mfr. Part No.QS18UPA
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MYR923.63
Each
units
50 → 500 mm PNP-NO Block - - - - - 30V 12 → 30 V dc Cable IP67 ABS Yes
RS Stock No. 405-7230
Mfr. Part No.T30UIPAQ
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MYR4,036.67
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units
150 → 1000 mm Analogue, PNP-NO Barrel M30 x 1.5 228kHz - - - 24V 12 → 24 V dc Pre-Wired IP67 PBT Yes
RS Stock No. 848-7165
Mfr. Part No.QS18UPAE
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MYR955.98
Each
units
50 → 500 mm PNP-NO Block - - - - - 30V 12 → 30 V dc Cable IP68 ABS Yes
RS Stock No. 847-9637
Mfr. Part No.QT50ULBQ6
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MYR4,769.86
Each
units
200 → 8000 mm Analogue Block - - - - - 30V 10 → 30 V dc M12 - 5 Pin IP67 ABS/Polycarbonate Yes
RS Stock No. 848-7216
Mfr. Part No.T30UXIAQ8
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MYR3,530.59
Each
units
100 → 1000 mm Analogue Block M30 x 1.5 - - - - 30V 10 → 30 V dc M12 - 4 Pin IP67 PBT Yes
RS Stock No. 848-7124
Mfr. Part No.Q45ULIU64ACR
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MYR3,727.34
Each
units
150 → 1400 mm Analogue Block - - - - - 24V 15 → 24 V dc Cable IP67 Thermoplastic Polyester Yes
RS Stock No. 850-3083
Mfr. Part No.T30UUPA
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MYR4,036.67
Each
units
150 → 1000 mm Analogue, PNP-NO Barrel M30 x 1.5 - 40 mm - - 24V 15 → 24 V dc Cable IP67 Thermoplastic Polyester Yes
RS Stock No. 850-3096
Mfr. Part No.T30UUPBQ
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MYR1,931.04
Each
units
300 2000 mm Analogue, PNP-NO Barrel - - 40 mm - - 24V 15 24 V dc M12 - 5 Pin IP67 Thermoplastic Polyester Yes
RS Stock No. 848-7168
Mfr. Part No.QS18UNAQ8
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MYR923.63
Each
units
50 → 500 mm NPN-NO Block M18 x 1 - - - - 30V 12 → 30 V dc M12 - 4 Pin IP67 ABS Yes
RS Stock No. 848-7193
Mfr. Part No.T30UXDAQ8
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MYR3,305.13
Each
units
100 → 1000 mm PNP/NPN-NO/NC Block M30 x 1.5 - - - - 30V 10 → 30 V dc M12 - 4 Pin IP67 PBT Yes
RS Stock No. 850-3055
Mfr. Part No.S18UUAQ
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MYR2,343.34
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. 405-7218
Mfr. Part No.T30UIPA
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MYR4,036.67
Each
units
150 → 1000 mm Analogue, PNP-NO Barrel M30 x 1.5 228kHz 40 mm - - 24V 12 → 24 V dc Pre-Wired IP67 PBT Yes
RS Stock No. 850-3046
Mfr. Part No.S18UIAQ
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MYR1,709.82
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. 850-3087
Mfr. Part No.T30UUPAQ
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MYR2,085.11
Each
units
150 1000 mm Analogue, PNP-NO Barrel - - 40 mm - - 24V 15 24 V dc M12 - 5 Pin IP67 Thermoplastic Polyester Yes
RS Stock No. 848-7174
Mfr. Part No.QS18UPAQ5
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MYR1,070.56
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. 848-7121
Mfr. Part No.Q45ULIU64ACRQ6
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MYR3,601.29
Each
units
100 → 1400 mm Analogue Block - - - - - 24V 15 → 24 V dc M12 - 5 Pin IP67 Thermoplastic Polyester Yes
RS Stock No. 860-1373
Mfr. Part No.S18UBAQ
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MYR958.33
Each
units
30 → 300 mm PNP/NPN-2NO Barrel M18 x 1 - 18 mm - - 30V - M12 - 5 Pin IP67 PBT Yes