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Ultrasonic Displacement Sensor

UD-300 series

Select Language

Sensor head/Controller






High-precision type sensor head

Long-range type sensor head

Ultra long-range type sensor head

Amplifier unit


Measurement range

60 to 300 mm

200 to 1300 mm

800 to 6000 mm

Display resolution



Indication system (Display)

±1% of F.S.*1

Analogue current output

Output current

4 to 20mA

Applicable load

0 to 500 Ω



Temperature characteristics

0.05% of F.S./°C



Relay output: 1c × 2, 220 VAC, 3 A (resistive load)

Alarm output

Relay output: 1a, 220 VAC, 3 A (resistive load)

Hysteresis (of detecting distance)

1 to 240 mm variable

1 to 255 mm variable

1 to 25 mm variable

Response time

38 ms (at 20 Hz)

56 ms (at 10 Hz)

303 ms (at 3 Hz)

Minimum detectable object

10 x 10 mm*3

20 x 20 mm*3

100 x 100 mm*3


Power voltage

24 VDC, Ripple (P-P) 10 % or less*4

Current consumption

250 mA or less

Environmental resistance

Enclosure rating


Ambient temperature

-25 to +70 °C

Relative humidity

35 to 85 % RH (No condensation)


Approx. 190 g (not including the cord)

Approx. 330 g (not including the cord)

*1 The Analogue output linearity is ±2.5% of F.S. (The F.S. is 300 mm for the UD-310, 1300 mm for the UD-320, 6000 mm for the UD-360, and 3000 mm for the UD-330.)
*2 The display resolution cannot be 1 mm or less (1 cm with the UD-360) when converted to distance.
*3 The minimum detectable object displays the size of the object to be detected that satisfies the specifications listed above. Depending on conditions such as presence/absence detection, it is also possible to respond to even smaller objects. Contact KEYENCE for more information.
*4 The usable range is 20 to 30 VDC.

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