在常温、常压的情况下，选择超声波物位计测量液体液位是最佳的选择，具有工作可靠、安装简便、使用周期长、免维护的特点，并具有相对的价格优势。 Under normal temperature and pressure conditions, the ultrasonic level gauge is the best choice for measuring liquid level. It has the characteristics of reliable operation, easy installation, long service life, maintenance-free and relative price advantage. . Because the ultrasonic level meter measures the level, the website promotes that it does not contact the measured medium, and at the same time it is a fully enclosed anti-corrosion structure. Therefore, it is most effective for measuring the level of various liquids such as thick, corrosive, and turbid good.
特点：两线制和三线制最大量程可达30m，四线制最大量程可达40m（料位测量可达25米）最小分辨率1mm，LCD/LED大显示屏；智能信号处理技术，全塑料防腐外壳（防护等级IP67）；配有高低位双继电器（四线制系列提供此功能）；简单的按键设定参数（无需等待容器排空或加满，无需附加的遥控器）；灵活的安装方式（螺纹或者法兰连接，固定孔或支架连接）两线制系列超声波液位计两线制超声波液位计采用两线制技术，供电和信号输出共用一根两芯电缆，输出4-20mA信号。 Ultrasonic level gauge features: two-wire and three-wire systems with a maximum range of up to 30m, four-wire systems with a maximum range of up to 40m (level measurement up to 25 meters), minimum resolution of 1mm, large LCD / LED display; intelligent signal processing Technology, all-plastic anti-corrosion housing (protection grade IP67); equipped with high and low double relays (four-wire series provides this function); simple key setting parameters (no need to wait for the container to be emptied or filled, no additional remote control required) ; Flexible installation method (thread or flange connection, fixed hole or bracket connection) Two-wire series ultrasonic level meter The two-wire ultrasonic level meter adopts two-wire technology. The power supply and signal output share a two-core cable. Output 4-20mA signal. Range: 4m ~ 30m can be measured; accuracy (in air): 0.2% of range; output load: 0 ~ 500Ω; display resolution: 1mm / 1cm; temperature compensation: full range automatic; input power: DC20-32V display mode : 4-digit LCD liquid crystal; medium temperature -40 ℃ ~ 85 ℃; housing material: ABS; detection cycle: 1.5 seconds; parameter setting: 3-position sensitive button; sensor material: PVC; sound beam angle: 8 degrees (3db) cable Device: PG13.5 Sealing sleeve Protection level: IP67 Pressure range: ± 0.1MP; Installation method: Thread (flange) or fixed hole (bracket) Output resolution: 0.03% of actual range Flange of container: Minimum inner diameter is 80mm, flange length is less than 150mm
通过发射高能超声波，使其从被测物体表面反射回来。 The ultrasonic level gauge emits high-energy ultrasonic waves to make it reflect back from the surface of the measured object. The reflected signal is processed by an improved algorithm, which enhances the effective signal and better discards the invalid interference signal. These high-energy sound waves ensure minimal signal loss after passing through the medium. Thanks to these high-energy sound waves, the sound wave loss is less than that of traditional ultrasonic instruments. The stronger the transmitted signal, the stronger the reflected signal. The receiver circuit can identify and monitor low-level signals even in a noisy environment. 1. Liquid-medicated measurement method. The probe fixing device is at the lowest level in the liquid. The ultrasonic pulses announced by the probe are transmitted from the probe to the liquid surface in the liquid, and then reflected back from the liquid surface to the unified probe and accepted. With this measurement method, the temperature of the liquid is not required to change much, and there are fewer elements in the medium that affect the transmission of ultrasonic waves. Otherwise, the change in the transmission speed of ultrasonic waves in the liquid will have a greater impact on the measurement results. 2. It is a gas-based measurement method. The probe device is in the gas above the highest liquid level. Under this method, the accuracy of the liquid level measurement is greatly affected by the transmission speed of ultrasonic waves in the gas. Under ordinary circumstances, you only need to agree with the premise of the device. This method is better, which is helpful for debugging and maintenance. 3, solid-media measurement method, a sound transmission solid rod or tube is pierced into the liquid, the upper end should exceed the highest liquid level, the probe device is on the upper end of the sound transmission solid, the formula H = vt / 2 is still used, but v Represents the speed of sound in a solid. The measurement methods described in 1, 2, and 3 belong to the single probe method and method, that is, the probe emits pulse sound waves, and then accepts them after transmitting and reflecting. Because the pulse needs to continue for a period of time during transmission, the echo and transmission wave placed in this period are not easy to distinguish. The interval corresponding to this period of time is called the measurement blind zone. When the head is installed, the interval above the highest liquid level should be greater than the interval between the blind spots. There is still a double-probe method for receiving and transmitting sound. The receiving and transmitting of sound waves are performed by the two probes on their own, which can greatly reduce the blind zone, which is very convenient in some extraordinary places where the device is relatively small.