Water level sensor

Water level sensor

Float type water level gauge

The principle is that the float senses the elevation of the water level. A general water level gauge that enables the recording structure of a float directly by means of a mechanical method,

A telex, a digital water level meter with a small float and a number of reed tubes are used to convert the rotation angle of the float to an incremental electric pulse or a binary coded pulse for long distance transmission. The mechanical water level meter is widely used. The application of float-type water level gauge requires logging equipment, which is only suitable for the low sediment content of the bank slope stability and small riverbed scour and siltation.

Trace type water level meter

Also known as the contact water level gauge, the use of the electric probe on the heavy hammer on the surface of the water to send electrical signals, so that the motor is turning or reversing, at any time to track the location of water points, so as to determine water level Generally on the steeper slope of the erection of iron pipes, suspension hammers and cables in the pipeline to lift, drive record or signal device. Iron Pipe inlet needs to have sediment and static water facilities.

Pressure type water level meter

It works by measuring the water pressure and calculating the level. It is characterized by the need to build a static water logging, the sensor can be

Fixed at the bottom of the river, with the pressure tube to eliminate atmospheric pressure, so as to directly measure the water level. There are two types of pressure-type water meters. A kind of bubble type, in the pressure pipe in the continuous transmission of gas, with automatic adjustment of the pressure balance to convert the water pressure into mechanical angle, thereby driving the recording mechanism. The other type is electrical measurement, which uses solid-state piezoresistive devices as sensors, can directly convert the water pressure into a voltage modulus or frequency output wire transmission to the shore for processing and recording.

Sonic Type water level meter

is a reflective water level meter, the use of acoustic waves in different interfaces to determine the principle of reflection. It is divided into two types: gas-medium and water-medium. The air-Medium is a sound-wave transmission medium, the transducer is placed above the water surface, reflected by the surface acoustic waves, according to the echo time can be calculated and show the water level. The instrument does not touch water body, completely free from the water sediment, velocity impact and aquatic plants and other adverse factors. The Shu Jie is to mount the transducer at the bottom of the river and emit sound waves to the surface. The sound wave travels high in the water medium,

The distance is large and there is no need to build a logging. Both water level gauges can be transmitted to indoor display or storage records by cable

Radar Type water level gauge

Radar water level meter is a high-precision, non-contact water level measuring instrument. By transmitting high frequency radar waves to the surface of the water, receiving reflection waves from the water surface, measuring the distance to the water surface, the measurement is not in contact with the surface, not affected by muddy water, sludge, aquatic plants and other factors. And the installation effort is small, just install one cantilever. Uses: river water level, the open channel water level automatic monitoring reservoir dam front, dam bottom water level monitoring pressure tower (well) level monitoring Tide automatic monitoring system, urban water supply, sewage level monitoring system radar water level meter is mainly used for water regime monitoring collection system to the level. Compared with the traditional float type and pressure type water level gauge and the popular ultrasonic water level gauge, radar water level technology is one of the most accurate and reliable technologies at home and abroad. Radar water level meter for the fluctuation of water, can be high-speed pre-CPU acquisition, signal processing, analysis and calculation, to use software programs to eliminate the disturbance of the surface shaking, so as to ensure the accuracy of the measurement, replacing the original anti-surge drum machinery and equipment. The ultrasonic water level meter has poor reliability due to its own physical characteristics. The measurement accuracy is affected by temperature, steam, air flow, the main advantage of radar water level meter is strong anti-jamming ability, not affected by temperature, wind, steam, installation, use, maintenance convenience. The water level sensor has the advantages of mature technology, stable performance and high precision, and is suitable for measuring water level use when the measurement precision is high. The radar has no mechanical wear, so it has a long life and is easier to maintain. Features: 1, all-weather work, 26G microwave reflection principle, strong anti-jamming ability 2, water level gauge reliable accuracy of 5 mm 3, no mechanical wear, non-contact measurement, long life, easy to maintain 4, measurement and water quality independent, not affected by floating ice and other 5, do not need to protect the well, no impact on water 6, can be unattended 7, ultra-low power consumption, support solar power 8, low cost, easy installation and maintenance, long life

Laser water level gauge

is to use the principle of laser ranging technology to carry out water level measurement, because the laser can not directly on the surface of the launch and directly penetrate to the bottom, it is necessary to place the surface of the plate.

When a laser beam is emitted from a laser sensor and reflected back to the sensor, the actual water level can be obtained by calculating the phase difference between the two laser beams.

Ultrasonic liquid level sensor working principle is emitted by the transducer high-frequency ultrasonic pulse encountered the surface of the measured medium is reflected back, the partial reflection echo is received by the same transducer,

Converted into electrical signals. Ultrasonic pulses are transmitted at sonic velocity, which is proportional to the distance between the transducer and the surface of the medium being measured, from the time interval required for transmitting to receiving the ultrasonic pulse. This distance value

The relationship between S and sound velocity C and transmission time t can be expressed in a formula:

S=ct/2

Because the transmitting ultrasonic pulse has a certain width, the reflection wave and the emission wave in the small area near the transducer can not be recognized and the distance value cannot be measured. This

Area is known as a measurement blind zone. The size of the blind zone is related to the type of ultrasonic liquid level sensor. Ultrasonic liquid level sensors can be used in a variety of complex conditions. Transducer built-in temperature sensing

The temperature compensation of the measured value can be realized.

Ultrasonic level controllers and transmitters provide reliable, low-cost, high-performance small tank liquid handling solutions. The LVCN414 is intended for process, control, and chemical delivery applications in small tanks mounted on slides, tools or machinery. The LVCN414 is highly flexible for applications designed for system integration or retrofit of floats, conduction and pressure sensors and can be easily configured via USB connection and Windows XP compatible software (downloadable from omega.com/ftp).

Water level sensor