Ultrasonic thermocouple common problems

1, mixing of ultrasonic thermocouple effects:

the containers are often stirring, liquid fluctuation is bigger, affect the ultrasonic thermocouple measurement; This kind of circumstance can properly reduce the speed of agitator, or at the center of the probe from stirring; Also can install the static tube, thus effectively eliminate for blender mixing the impact of the level measurement.

2, bubble of ultrasonic thermocouple effects:

in the process of use ultrasound thermocouple to measure the liquid level, often encounter the interference of bubbles. Foam according to the attributes can be divided into: dry, wet, neutral, four kinds of heavy.

dry foam and wet the ultrasonic can be reflected, so use a ultrasonic thermocouple to measure no effect; Neutral foam will absorb and diffuse part of the ultrasound, which will weaken the ultrasonic reflection, lead to echo instability. So when the surface of the medium to thick and thick foam, ultrasonic thermocouple measurement error will be larger, even you can't measure.

in severe working conditions, the FLOWLINE ultrasonic thermocouple can add static tube way to weed out the interference of bubbles. This is Beijing kang Nathan company exclusive patented technology.

3, steam, and the fog of ultrasonic thermocouple effects:

when working environment temperature is high, the liquid medium is easy to produce steam or fog, because the steam is lighter than air, so to rise to the top, to form a layer of ultrasonic pulse is absorption and scattering of vapor layer. Through adding static tube, can reduce or weaken the steam layer effect on the measurement.

4, blind area of SF - P ultrasonic thermocouple effects:

ultrasonic thermocouple blind area, like people's eyes, blind area when the object is near the eyes is very close, but can't see clearly, this distance is called the blind area.

　　SF- P ultrasonic thermocouple blind area, varies according to the range. Small range, the blind area, range is big, the blind area. So the measurement of the highest level shall not be higher than ultrasonic thermocouple blind spots.

5, pressure and temperature on the ultrasonic thermocouple effects:

in the first place, the speed of sound can't spread under vacuum, and the essence of the ultrasonic wave is a kind of sound waves, and belongs to the mechanical wave, so it cannot travel through a vacuum.

second, is the temperature, while the parameters of the ultrasonic thermocouple summary have maximum pressure value, but with the increase of temperature, the maximum pressure value will be reduced accordingly, so attention should be paid to this parameter in the selection.

in addition for thermocouple installed in the outdoor, can be used to add sun shade and other measures to weaken the influence of temperature factor.

static tube patent technology installation note: SF - P ultrasonic thermocouple of Echo - has been adopted Pipe technology, allowing the detector installed in the 2 '4' metal or nonmetal catheter, outside of the tube wall reflection wave interference, suitable for mixing, foam, water vapor and around obstacles generated clutter environment application.

when installing catheter pay attention to the following:

1, select the appropriate pipe diameter.

2, catheter internal smooth, no welding seam.

3, in the blind area in open holes, ensure pipe pressure balance inside and outside.

4, catheter bottom to be submerged under the lowest measuring liquid level.

the bottom 5, 45 ° inclined to open mouth, maintain the normal flow liquid.

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