Floating Ball Liquid Level Sensor The floating ball liquid level transmitter is composed of magnetic floating ball, measuring conduit, signal unit, electronic unit, junction box and mounting parts. Generally, the specific gravity of the magnetic floating ball is less than 0.5, which can float above the liquid level and move up and down along the measuring conduit. The conduit is equipped with measuring elements, which can convert the measured liquid level signal into a resistance signal proportional to the change of liquid level under the action of external magnetism, And convert the electronic unit into 4 ~ 20mA or other standard signal output. Floating Ball Liquid Level Sensor,Liquid Level Measuring Sensor,Float Type Liquid Level Sensor,Liquid Level Measurement Sensor Taizhou Jiabo Instrument Technology Co., Ltd. , https://www.taizhoujbcbyq.com
Monochromatic LEDs efficiently cover most of the visible spectrum. In terms of blue light, the external quantum efficiency of the nitride diode exceeds 65%. For red light, the efficiency of the phosphor diode is about 50%. Of course, so far, no high-efficiency monochromatic LED can cover the "yellow energy gap" near 560 nm.
Using previous experience in warm white light, the researchers successfully used the down-conversion to convert blue LED wavelengths into monochrome amber light with a wavelength of 595 nm with a color purity of 98.7%. Depending on the temperature, the external quantum efficiency of PC amber LEDs is around 30%-40%. The new PC amber LED is five times brighter than the amber LED made directly. The luminous flux reaches 70 lm at 350 mA.
These LUXEON Rebel PC amber LEDs are used in a wide range of applications. It can be used in yellow traffic lights or signal lights, and can also be used in car turn signals or building sign warning lights. They can also be used in consumer electronics, and their high efficiency also makes their prices less expensive. 
The liquid level sensor is a modular circuit, which has the advantages of acid resistance, moisture resistance, shock resistance and corrosion resistance. The circuit contains a constant current feedback circuit and an internal protection circuit, which can make the maximum output current no more than 28ma, so it can reliably protect the power supply and prevent the secondary instrument from being damaged.
A few days ago, Philips Lumileds (San Jose, Calif.) researchers developed a monochromatic photo-nitride diode closest to the yellow LED's energy gap, a phosphor-transformed (PC) amber LED developed by Regina Mueller-Mach and her colleagues. By down-conversion of blue light from a single InGaN LED to longer wavelength light, cold white or warm white light (from a blue LED) is produced by adjusting different processes.