Kaidi KD-908F 26 GHz Radar Water Level Gauge for water level measurement of sewers, manholes and rivers

The KD-90X series sensor is a 26G radar water level gauge measuring instrument with a measuring distance of up to 80 meters. The antenna is further optimized, and the new and fast microprocessor can perform higher-speed signal analysis and processing, making the meter can be used for measurement of various strongly corrosive liquids.

The radar water gauge antenna emits a very narrow microwave pulse. This pulse travels in space at the speed of light and meets the surface of the measured medium. Part of its energy is reflected back and received by the same antenna. The time interval between the transmitted pulse and the received pulse is proportional to the distance from the antenna to the surface of the measured medium. Due to the extremely high propagation speed of electromagnetic waves, the time interval between the transmitted pulse and the received pulse is very small (nanosecond order) and it is difficult to confirm. The radar water level gauge adopts a special demodulation technology, which can accurately identify the time of the transmitted pulse and the received pulse. The distance from the antenna to the surface of the measured medium is further calculated. 

                                                                                                                                          A: Range setting, B: Low position adjustment, C: High position adjustment, D: Blind zone range

The reference surface of the measurement is: the bottom surface of the thread or the sealing surface of the flange.

Note: When using radar water level timing, be sure to ensure that the highest liquid level cannot enter the blind area of the measurement (the area shown in D in the figure)

The radar water level gauge recommended by the industry uses a 26GHz transmission frequency, so it has:

● The beam angle is small, the energy is concentrated, and the anti-interference ability is stronger, which greatly improves the measurement accuracy and reliability.

● The antenna size is small, easy to install and add dust cover and other antenna protection devices.

● Lighter about 1KG, easy to install.

● The measurement range is up to 30 meters, covering water level measurement such as large reservoirs.

● Various output circuit interfaces cooperate with the acquisition system.

● It adopts the pulse working mode, the transmitting power of the radar water level gauge is extremely low, and there is no harm to the human body and the environment.

Application: Water level measurement of sewers, manholes and rivers

Measuring range: 30 meters

Process connection: Gantry frame, locking flange from DN 80/3"

Process temperature: -40～80℃

Process pressure: (-0.1～0.3) MPa

Accuracy: ±5mm

Frequency range: 26GHz

Protection level: IP68

Power supply: DC (6-24V) / four-wire DC 24V / two-wire

Signal output: 4...20mA/HART (two-wire/four-wire) RS485-Modbus

Shell: PP fully sealed shell 

Please pay attention to the following items to ensure that the meter can be installed correctly: Please reserve enough space for installation. Please avoid installation situations with strong vibration.