Cable type, pole type, coaxial sleeve

Rod Probes

Firstly, based on their names, some differences can be seen between level gauges and level gauges. The first and second are rod probes, which are mainly divided into sizes of 8mm and 12mm. The thicker the probe, the larger the range and the more sturdy it is. The more severe the working conditions, the thicker the probe used. Coarse probes are less likely to swing and the hanging material is more likely to fall off. They can also be used in the face of mixing conditions. The summary is that the working condition is directly proportional to the size of the measuring rod, with 8mm being the most common.

Cable Probes

The third one is the cable probe, the most obvious part of which is the tail, and there are several types of cable probes:

• With heavy hammer: The function of a heavy hammer is to straighten the cable and ensure accurate measurement, making it more suitable for liquid measurement.
• With centering hammer: Used in foam, slurry and dust environments to keep the probe centered and prevent material hanging.
• Without counterweight: Used for lightweight media or places with limited installation space, and is generally rarely used.

There are generally two types of cable types: 2mm and 4mm.

Coaxial Sleeve

The last one is the coaxial sleeve, which consists of two coaxial metal tubes inside and outside, with the measurement area in the middle. It is generally used for guided wave radar to guide electromagnetic wave propagation along the casing and eliminate interference in the tank, such as agitator, foam, steam, etc. Ensure measurement stability. There are various diameter options, generally above 20mm, and there are two types of hole types: single hole and multi hole. The larger the hole, the better the medium circulation and the less likely it is to hang materials. The basic introduction of these three types of probes is completed.

Top Centering Rod

To add, the top centering rod. The top centering rod is a short rod or bracket installed at the top of the probe (near the flange/connection) to "support" the probe at the center of the connection. The function is to prevent the probe from tilting or sticking to the wall inside the pipe, avoid interference caused by radar waves hitting the pipe wall, reduce probe oscillation caused by medium flow or stirring, and improve measurement stability. Prevent the probe from shaking when the instrument is installed on the short pipe and short section.