Select high-quality LED light source according to the nine performance characteristics of LED

The LED market is booming and mixed, how to choose a good LED product has become a big problem for consumers. In the face of such a market, it is necessary to remain calm and calm, understand the performance characteristics of LED, and make better choices. Everyone introduces the method of selecting an LED light source.
With the rush of the market, as consumers, LEDs still need to be calm, scientific analysis, select the best cost-effective light source and lamps, the following describes the basic performance of several LEDs:
1. The brightness of the brightness LED is different and the price is different. LEDs for LED luminaires shall comply with the laser class I standard.
2, anti-static ability Anti-static ability of the LED, long life, and therefore high price. LEDs with an antistatic greater than 700V can usually be used for LED lighting.
3. LEDs with the same wavelength and wavelength have the same color. If the color is consistent, the price is high. It is difficult for manufacturers without LED spectrophotometers to produce pure color products.
4. Leakage current LED is a unidirectional conductive illuminator. If there is reverse current, it is called leakage, and LED with large leakage current has short life and low price.
5. LEDs with different illumination angles have different illumination angles. Special lighting angle, the price is higher. Such as the full diffusing angle, the price is higher.
6. The key to different quality of life is life, and life is determined by light decay. Low light decay, long life, long life and high price.
7. The illuminator of the wafer LED is a wafer, and the price of the wafer varies greatly. The chips in Japan and the United States are relatively expensive, and the prices of wafers in Taiwan and China are generally lower than those in Japan and the United States.
8. Wafer Size The size of the wafer is indicated by the side length. The quality of the large wafer LED is better than that of the small wafer. The price is proportional to the size of the wafer.
9, colloidal ordinary LED colloid is generally epoxy resin, LED with anti-ultraviolet and fire retardant is more expensive, high-quality outdoor LED lighting should be resistant to UV and fire. Each product will have a different design and different designs for different uses.
The reliability design of LED lighting includes: electrical safety, fire safety, environmental safety, mechanical safety, health and safety, and safe use time. From the perspective of electrical safety, it should comply with relevant international and national standards.
This article only teaches you how to choose a good LED light source from these nine aspects. I hope readers will help after watching it.

Piezoelectric ceramic disc   

Quick delivery 

High performance

Application: flow meter measurement 


There are many kinds of USF used in closed pipeline according to the measuring principle, and the most commonly used are propagation time method and Doppler method. Among them, time difference ultrasonic flowmeter is used to measure fluid flow by the principle that the time difference of sound wave propagating downstream and countercurrent is proportional to the velocity of fluid flow. It is widely used in raw water measurement of rivers, rivers and reservoirs, process flow detection of petrochemical products, water consumption measurement of production process and other fields. According to practical application, time-difference ultrasonic flowmeter can be divided into portable time-difference ultrasonic flowmeter, fixed time-difference ultrasonic flowmeter and time-difference gas ultrasonic flowmeter.


Ultrasonic flow-meters use at least two transducers aligned so that ultrasonic pulses travel across the flow of liquid or gas in a pipe at a known angle to the flow. 



Technical data:

Electromechanical coupling coefficient Kp: > 0.62    

Dielectric Loss tg δ: <2%



Nominal Piezo discs for ultrasonic flowmeter: 

OD14.2*1MHz           PZT-51

OD14.6*1MHz           PZT-51

OD15*1MHz              PSnN-5

OD15*2MHz              PSnN-5

OD20*1MHz              PSnN-5 

OD20*2MHz             PSnN-5

OD15*1MHz              PZT-51 

OD15*2MHz              PZT-51

OD20*1MHz              PZT-51 

OD20*2MHz              PZT-51

Size,  Frequency and Electrode on request. 


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Piezoelectric Discs For Flowmeter Sensor

Piezoelectric Ceramic Disc,Piezoelectric Discs For Flowmeter Sensor

Zibo Yuhai Electronic Ceramic Co., Ltd. , https://www.yhpiezo.com