KUS630 Series Ultrasonic Level / Distance Sensor

KUS630 Series Ultrasonic Water Level Sensor

KUS630 Series Ultrasonic Level distance sensor



  • High sensitivity
  • Fully sealed
  • IP68 protection class
  • Corrosion-resistant housing, suitable for corrosive media and applications
  1. Dimensions

Unit in the diagram is mm

Type B

Type C

  1. Electrical connections and signal definitions
Line order Colour Definition
1 Red Power is positive
2 Black power return ground
3 Yellow Analog output, voltage output, current output switch output
4 Blue RS485 A  or uart TXD
5 Green RS485 B- or uart RXD


Cable color Line order Describe Remark
red 1 powered by 3.3V-30V wide voltage input
black 2 GND
yellow 3 Switch output Switch terminal, load capacity 1A 60V, supports up to two switch outputs with independent logic, the two terminals are the two contacts of the switch, do not distinguish between positive and negative poles, and can be connected at will.
White 4 Switch output
brown 4 RS485A
green 5 RS485B-



4.Parameter description of Ultrasonic water level sensor

Measuring range 0.6m… 15m

Or 1.2m….30m

Or 1.8m….50m


Blind spot

0 … 0.6m/1.2m/1.8m(Unstable working area is within 0.6m, it is not recommended to work in this range); the minimum blind area version of 0.3m can be achieved, which needs to be customized.
Supply voltage 3.3 … 24 V DC , ripple 10 %SS
Working current ≤ 45 mA (fastest measurement speed)

Low-power version, sleep power consumption is less than 0.3mA, sending power consumption is 20mA (less than 2ms), and receiving power consumption is not more than 8mA (less than 150ms)



Output signal

1:Programmable analog output 0-10V.

2:RS485 output.

3:Uart serial output

4:4-20mA output

5:Switch output

Measurement accuracy ≤1 %
Temperature compensation yes


working conditions


Working temperature -25…70℃(248…343K)
Storage temperature -40…85℃(233…358K)


other instructions


Electrical connection 5-core cable (analog output), 6-core cable (switch output);
Protection class IP68
Shell material PVC /PVDF/PTFE/ABS


  1. Sensor function


The analog output can be set through RS485, and the ultrasonic water level sensor can work in 8 modes. The specific reference is as follows:

Step 1: Connect to the host computer through serial port debugging assistant or modus debugging assistant.

Step 2, set a near point reference distance point.

Step 3, Set a far point reference point

Step 4, set the output voltage or current of the near-point reference point.

Step 5, set the output voltage or current of the far point reference point.

Step 6, set the analog output to switch characteristic selection.

Step 7, set the analog output as linear output or switch output option.

Step 8, reset the sensor to make the new parameters take effect.

8 working modes of the KUS630 ultrasonic water level sensor.

1: Open window mode by default

2: Windowed mode is turned off by default

3: Single-point mode is turned on by default

4: Single-point mode is turned off by default

5: Single-point hysteresis mode is turned on by default

6: The single-point hysteresis mode is turned off by default

7: The presence or absence of detection mode is turned on by default

8: The presence or absence of detection mode is turned off by default


485 output data

485 output data is in MODBUS-RTU format. Refer to the software instruction manual for details.

6.Serial port setting output form example


  1. Ordering Information


KUS Model Output Range Describe
630A Product series model and shape, the default delivery is Type A, support customization
0-10V Analog 0-10V output
0-5V Analog 0-5V output
0-3V Analog 0-3V output
4-20mA Analog 4-20mA output
SW Switch output
Uart Uart serial output MODBUS RTU protocol
RS485 RS485 output  MODBUS RTU protocol
XXX mm XXX mmmeans the maximum measurement distance


KUS 550 RS485 10000mm

Appendix: Influence of Side Lobe Effect on ultrasonic water level sensor Installation

Weight 0.35 kg
Dimensions 15 × 15 × 10 cm

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