的整体部位有很多的了解。 There is a lot of knowledge about the overall position of the ultrasonic level gauge . 价格也还是不一样的。 The price for different types of ultrasonic level gauges is also different. There are many considerations for the selection of ultrasonic level gauges, and there are many preparations.
1.Understand the jar
Level change range, the highest level and zero position, which is the corresponding 4-20MA, can be set here
The distance between the caliber and the installation position of the meter and the tank wall, which has a beam angle problem, is generally 8-10 degrees
Temperature, depends on the temperature that actually affects the table, -25-80 degrees
2.Understand the measured medium
Whether anti-corrosion is required, and some chemicals need anti-corrosion probes (material is polytetrafluoroethylene (Ptfe))
Whether there is fog, the treatment method, adding 4F film to the probe backing, can prevent the probe from condensing moisture, and the blind area with 4F film will be larger, generally 40CM
Is there any volatile gas (generally a chemical), and in some cases, the gas is volatilized to the probe, which will affect the speed of sound of the ultrasonic wave, and sometimes cause errors in the measurement.
Liquids, objects, dusts, regularity, liquids and flat objects can be measured with the actual range, others can be increased by 1-2 specifications
3. Understand site installation requirements
Cable length (split) comes standard
Blind zone: 20-60CM depends on the measuring range. The installation needs to reserve a blind zone. It is recommended to set it to 40CM
Installation: flange specifications, etc.
Supply voltage selection.
One or two