Product blog

We TOKYO KEIKI INC. are the manufacturer of Non-contacting Radar level gauge. This time, we will introduce an application for river monitoring.

Open Channel Ultrasonic Flowmeter UW-D Series

The Non-contacting Radar level gauge features accurate & non-contact level measurement with simple installation over a target liquid, in this case, river water surface.

At this particular site, the Radar gauge provides stable level measurement of the river level, unaffected by atmospherics like typhoon or fog. Especially for typical application of flood alert monitoring station, river water level must be monitored for disaster prevention. So high-accurate and stable level monitoring is suitable application for radar gauge.

Submerged pressure sensor systems are often used in these types of installations. The sensors detect the pressure exerted by the liquid’s mass. Pressure is then converted to level measurement in accordance with preset densities. These types of gauges are commonly applied in waterworks because of their relatively simple construction and design which involves direct sensor-liquid contact (wet installation). There are disadvantages however with these types of gauges. For example, river bottom sediment may cause an increase in submerged pressure transducer measurement errors.

Ultrasonic level gauges are also frequently employed as a non-contact means of level measurement. This type of gauge measures the round-trip transiting time of high frequency sounds to and from the surface of a liquid and converts this into distance. Ultrasonic level gauges however are easily affected by fog, vapor, pressure, temperature changes, and other environmental factors.

Radar level gauges, which incorporate electromagnetic waves (microwaves) on the other hand, do not require direct　contact with liquids, density parameters or complex capacitance comparisons. Microwave-based level gauges are also least affected by ambient conditions. In addition, the KRG-10 /MRG-10 radar level gauge offers HART 2-wire loop communication protocol　(MD-10 has RS-485 digital out put only) so customers can change any parameter from a central computer station with PC and configuration software. The our Radar level gauge 4-key input menu display also allows parameter setting on site as an alternate method.

Site photos