Sincerely thank you for choosing our companyUltrasonic level gaugeYe Li is a professional manufacturer of ultrasonic level gauges, andPrice of ultrasonic level gaugeDiscounts, bulk discounts!This instrument contains multiple patented technologies, which are characterized by safety, cleanliness, high accuracy, long service life, stability and reliability, and easy installation and maintenance. It is suitable for acids, alkalis, salts, etcantisepsisDomain.
This instrument can be connected to display meters or various DCS systems through 4-20mA or RS485 (Modbus protocol or other customized protocol), providing real-time liquid level data for industrial automation operation.

Ye Li'sUltrasonic level gaugeHas the following characteristics:
The circuit design selects high-quality power modules and imported high stability components from the power supply section onwards. The YEH-KJ series ultrasonic level gauge can almost replace similar imported instruments from abroad.
The patented sound wave intelligent technology software can perform intelligent echo analysis without any debugging or other special steps. This technology has the functions of dynamic thinking and dynamic analysis.
Our company's patented sound wave intelligent technology greatly improves the accuracy of instruments, achieving liquid level accuracy of0.25%～0.5%.
This instrument is a non-contact product that does not come into direct contact with liquids, resulting in a low failure rate. The instrument provides multiple installation methods, and users can choose freely through this manual.
All input and output lines of the ultrasonic level gauge have lightning protection and short-circuit protection functions.

2.1 Technical indicators of two-line ultrasonic level gauge
Measurement range: 5m, 10m, 15m, 25m (selected according to the actual measurement range)
Blind spot: 0.25m～0.8m
Distance measurement accuracy: 0.25%～0.5% (standard conditions)
Distance measurement resolution: 1mm
Pressure: below 4 atmospheres
Instrument display: Equipped with LCD to display liquid level or spatial distance
Analog output: 4-20mA
Digital output:not have
Power supply voltage: DC24V/1W, built-in lightning protection device (customizable 12V power supply)
Environmental temperature: -20 ℃~+60 ℃. High temperature can be customized (temperature resistance up to 90 ℃ can be customized)
Protection level: IP65 or IP68

2.2 Technical specifications of four wire ultrasonic level gauge
Measurement range: 5m, 10m, 15m, 25m (selected according to the actual measurement range)
Blind spot: 0.25m～0.8m
Distance measurement accuracy:0.25% to 0.5% (standard conditions)
Distance measurement resolution: 1mm
Pressure: below 4 atmospheres
Instrument display: Equipped with LCD to display liquid level or spatial distance
Analog output: 4-20mA
Digital output: RS485, Modbus protocol or custom protocol
Relay output: Two independent outputs
Power supply voltage: DC24V/AC220V, built-in lightning protection device(Customizable 12V power supply)
Environmental temperature:Customization is required for high temperatures ranging from -20 ℃ to+60 ℃ (temperature resistance up to 90 ℃ can be customized)
Protection level:IP65 or IP68

Example of the function of the four wire ultrasonic level gauge relay:

Tighten from bottom to top. The installation must ensure that the probe surface of the ultrasonic level gauge is perpendicular to the measured liquid level. Common YEH-KJ seriesUltrasonic level gaugeThere are three installation methods to choose from.


4. Installation Guide
When installing the probe, the distance from the probe face to the highest liquid level should be greater than the blind spot, and the probe end face should extend into the tank. (with the exception of an extension tube)
Pay attention to the installation angle, and the probe should be perpendicular to the liquid level.
Avoid the feeding sector.
If multiple ultrasonic instruments need to be installed simultaneously in one tank, they must be spaced at least 2 meters apart.

【Extension pipe installation】
If the measured high position is within the blind zone range, the probe must be installed on the extension tube.
The diameter and length of the extension tube are limited. See the figure on the right for details.
Avoid condensation and adhesion inside the extension tube.
The inner surface of the extension tube should be as smooth as possible（No welding points and various seams）
The extension pipe mouth must be smooth. A 45 degree angle is ideal.

【Installation of waveguide tube】
If there is strong echo interference on site (such as in narrow shafts, unavoidable steps, etc.), it is recommended to use ultrasonic waveguide pipes with a diameter greater than 100mm (such as PE or PVC sewage pipes). Smooth inner surface of waveguide as much as possible（No welding points and various seams）. There are ventilation holes at the top. A 45 degree angle at the mouth of the pipe is ideal. Ensure that the waveguide is not dirty, and if necessary, clean the waveguide regularly.

5. On site physical reference: