Contactless 2 Wire RS485 IP67 Ultrasonic Level Sensor

 2 Wire Ultrasonic Level Sensor with 24VDC or 220VAC Power Supply

1. Application:

The series is an integrated two-wire ultrasonic level meter continuous contactless liquid level measurement of liquids and solids. It consists of probes and electronic devices, both of which are leak-proof structure. This series of products can be widely used in metallurgical industry, chemical, electricity.

2. Features:

1) Compact continuous non-contact liquid level measurement;

2)  Integrated design, easy to install;

3)  Over voltage, over current protection, lightning protection;

4)  Large LCD or LED display window, easy to debug and observe;

5)  Strong anti-interference ability;

6)  4-20mA output;

7)  Intelligent signal processing technology to ensure that the instrument meets various working occasions

8)  Full metal shell (IP67), sealed, alkali resistance, and meet the harsh environment.

3. Measuring principle: Time-of-flight method

The liquid level meter is composed of an ultrasonic probe and an electronic tube. The unit level instrument is installed at the top of the container. Under the control of the electronic device, the ultrasonic probe transmits the ultrasonic pulse to the subject.The sound wave is reflected by the surface of the object, and part of the echo received by the detector is converted into an electrical signal.The signal meter measures the time between pulse transmission and reception.The time is proportional to the distance between the probe and the object to be measured.

The electronic device detects this time and calculates the measured distance based on the known speed of sound.The level value can be obtained by subtraction.

                                                                        H: installation height

                                                                        D: distance value

                                                                        L:  level value

                                                                        B:  blacking distance

                                                                        F:  full scale

4. Technical data:

 Basic data

Note: When using to measuring solid level, the most energy of ultrasonic is absorbed or scattered by solid level, so the back wave is very little, the valid measuring range of solid level is about 50% of liquid level. And the valid measuring range of solid level is determined by the installing location and rang.

The blacking distance: