Radar level gauges and ultrasonic level gauges, often users will ask them what is the difference between the two? Now let's talk to you about the difference between the two radar level gauges and ultrasonic level gauges. Often users will ask them what is the difference between the two? Let me tell you the difference between the two now:
Different working principle
1.EXSK-WW ultrasonic level gauge is caused by the vibration of the probe to cause gas vibration around the probe, and finally the ultrasonic wave is emitted. Simply put: Ultrasound is the vibration of the air.
2. Radar level gauges emit electromagnetic waves regardless of high frequency or low frequency, just like the radio signal of mobile phones.
Measuring the temperature of the working conditions is different
1.EXSK-WW ultrasonic level gauge general working temperature (such as the temperature inside the tank, the temperature inside the pool) is -20 ~ +60 ° C, do a good job at -20 ~ +80 ° C, if you can do it at any cost - 20 ~ +100 ° C.
2. Radar level gauge produced by Hangzhou Ambrera, the high frequency can withstand temperature of 300 ° C, and the low frequency can withstand temperature to 400 ° C. If the site can modify the installation according to our requirements, the high frequency can withstand temperatures up to 600 ° C, and the low frequency can withstand temperatures up to 500 ° C.
Different pressure levels
1.EXSK-WW ultrasonic level gauge is the probe under the pressure inside the tank, the host is atmospheric pressure outside the tank. The pressure resistance of the probe inside the can is 3 kg.
2. The radar level gauge is that the antenna is subjected to pressure inside the can, and the main unit is at atmospheric pressure outside the can. Conventional radar withstand voltage can reach 10 kg, and the current maximum pressure is 40 kg.
Suitable for measuring different liquids
1.EXSK-WW ultrasonic level gauge can measure strong acid and strong alkali liquid, but for strong volatile liquids, such as: gasoline, acetone, toluene, xylene, ethyl acetate, etc., because the speed of sound in the tank changes, with air The difference in the speed of sound in the middle will cause the measurement error to become larger. Measuring the error of gasoline can reach about 10-15% of the entire measurement range.
2. The radar level gauge can measure more liquid than the ultrasonic level gauge. It can be measured not only by strong acid or alkali, but also by highly volatile liquids such as gasoline and xylene. Because electromagnetic waves are not affected by volatility during propagation.
Different adaptability to foamy liquid level
1.EXSK-WW ultrasonic level gauge, the field measurement of foam with more than 1 cm on the liquid surface is limited, the signal attenuation can reach 90-100%, and the measurement under negative pressure will also be affected.
2. The radar level gauge can measure through a foam of 5-6 cm thickness. It can be measured normally under both negative pressure and vacuum.
Different launch angles
1. The emission angle of the EXSK-WW ultrasonic level gauge within 5 meters is 18°±4°, the emission angle within 10 meters is 23°±4°, and the range of 11-20 meters is 26°±4°.
2. The launch angle of the CJ-6053 low-frequency radar level gauge with a diameter of 146 mm is 18°, the launch angle of the 196 mm flare is 14°, and the launch angle of the 246 mm flare is 12°.
The GY-6902 high-frequency radar level gauge has a launch angle of 8° for a 96 mm flare and a 6° flare angle for a 121 mm flare.
Different measurement accuracy (calculated in 10 meter range)
Without considering the effects of steam, dust, foam, volatility, agitation, etc.:
1. The measurement accuracy of the EXSK-WW ultrasonic level gauge is 0.5 to 1.0% of the whole range, calculated by the 10 meter range, and the error is ±5 cm to 10 cm.
2. CJ-6053 low frequency radar level gauge error is ± 2 ~ 3 cm.
3. GY-6902 high frequency radar level gauge error is ± 1 cm.
The impact on the measurement is different in windy environments.
1.EXSK-WW ultrasonic level gauge in the natural environment, grade 3-9, will attenuate the ultrasonic signal by 20% to 50%, resulting in the maximum measurement range of the ultrasonic level gauge will be shortened. The greater the wind, the smaller the maximum distance the ultrasonic level gauge can measure. At 10 winds, the signal can be attenuated by 90%.
2. CJ-6053 low-frequency radar level gauge in the natural environment, the wind above 10, will attenuate the radar signal by 20%.
3. GY-6902 high-frequency radar level gauge in the natural environment, the wind above 10, will attenuate the radar signal by 20%.
The distance from the tank wall or the pool wall during installation is different. Take the 10 meter range as an example. Assume that the tank wall or the pool wall is flat and up. The standard installation conditions are:
1.EXSK-WW ultrasonic level gauge, the distance from the tank wall or pool wall should be more than 1.2 meters.
2. CJ-6053 low-frequency radar level gauge, the distance from the tank wall or pool wall should be more than 1.1 meters.
3. GY-6902 high-frequency radar level gauge, the distance from the tank wall or pool wall should be more than 0.6 meters.
The flange size of the installation is different. Take the 10 meter range as an example. Install the top of the tank. The flange sizes required by the three are:
1.EXSK-WW ultrasonic level gauge, the minimum is DN65 flange, the height of the joint between the flange and the top of the tank is less than 100 mm. It is best to use DN100 flange connection, the height between the flange and the top of the tank is less than 180 mm.
2. CJ-6053 low frequency radar level gauge, connected by DN150 flange, the height of the joint between the flange and the top of the tank should be less than 180 mm.
3. GY-6902 high-frequency radar level gauge, connected by DN100 flange, the height of the joint between the flange and the top of the tank should be less than 180 mm.
The above is the difference between the radar level gauge and the ultrasonic level gauge, and there are other differences in details, which are not reflected here.
Umbrella - radar level gauge, ultrasonic level gauge manufacturer, has been sincerely providing customers with good products and good service programs for the purpose, if you are interested in the above radar level gauge, ultrasonic level gauge or have questions ,Please contact us.
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