Project Description
Non Contact Ultrasonic Liquid Level Indicator
Working Principle
Ultrasonic sensor transmit and receive ultrasonic under the control of the microprocessor. Use the ultrasonic transmission time( t )in the air to calculate the distance(s) between the medium and the ultrasonic sensor. Due to the speed(c) of sound waves in the air is a certain amount , depending on: s = ct / 2 s can be calculated, and because the distance(H) from the ultrasonic sensor to the bottom of the container is certain, the level of the medium to be tested H = H – s.
Features
Adopting high speed digital signal processing technology, intelligent recognition and analysis, suitable for bad environment.
Advanced signal environment display (oscilloscope technology), easy for debugging and installation.
High-speed and reliable microcomputer processing, fast and stable.
Non-contact measurement, multiple data filtering technology, stable and reliable measurement.
High accuracy D/A output, improve the precision of 4-20 mA output.
Equip with 485 interface, can contact with computer and other data collector.
Technical Indicators
| Measurement Range | 5m, 10m, 15m, 20m |
| Accuracy | 0.25%, 0.5% |
| Resolution Ratio | 1mm |
| Operating Temperature | ﹣20℃~﹢50℃ |
| Protection Grade | Display part: IP65, probe part: IP67 |
| Power Supply | AC220V±10% 6W, DC24V |
| 4~20mA Output | External Loading: 0～500Ω Error: 0.1% (Relative instrument indicate） Output: Level or distance |
| RS485 (Optional) | Encoding: 1 start bit, 8 data bits, 1 stop bit Baud rate: 9600 00-09, when set as 00, every measurement will output at a time When set as 01-09, need order query: Send the format: !X (x is address) The echo formats: 3.128 |
| Relay（Optional) | Control mode: the upper limit of liquid level , the lower limit of liquid level . Type: single pole double throw (normally open, normally closed) Contact capacity: AC250V 1 A.DC30V 5 A |
