FAQ
－ Level Transmitter －

Models vary based on state of object (bulk, granular, powder, slurry, liquid), physical properties (corrosivity, adhesion, dielectric constant, conductivity, etc.), and environmental conditions (temperature, pressure, humidity, etc.)

We have compiled information that will help you choose a model, so please refer to it as well.

 

>> What is a Level Transmitter? Easy-to-understand explanation of types, usage, and how to choose a model

 

Microwave Level Transmitters are also available that comply with the Radio Law (weak radio equipment). Products that comply with the Radio Law have low power and are not suitable for powder measurement. All 80GHz Level Transmitters are specified power-saving devices that comply with the Radio Law. It can be used outdoors regardless of whether it is powder or liquid.

Although the physical properties vary depending on state of deposition and density, a rough guideline is a dielectric constant of about 2. We are currently conducting field tests with various raw materials.

It is also possible to measure objects with low dielectric constants, which were difficult to measure with microwave Level Transmitters (26GHz series). Once we have collected the test data, we would like to announce it on our website.

Actual results in the field are 5m.

In our in-house offline test, we measured 20m.

It depends on size and amount of foams.
It is difficult to say how much bubbles should be present as it varies depending on physical properties of object to be measured, but from experience we have learned that with foams the size of a soap foam (about 5 cm), the liquid level can be measured by passing through the surface. 
As an example of small foams, it is easy to understand if you think of fine foams that occur when sea is rough.

For foams close to this condition, we have a track record of measuring the foam surface but not being able to measure the liquid level.
In such cases, there are cases where problem was solved by using >> guide pipes (breakwater tubes), so please refer to them.

If you have any concerns, we can also conduct an on-site test using a demo machine. Please feel free to contact us. We do not accept changes in electrode dimensions.

We propose a Radar Type River Water Level Transmitter.
Even in situations where there is so much steam that the measurement surface cannot be seen, it can pass through the steam and measure it.
However, if a large amount of water condenses at the base of the microwave Level Transmitter's antenna, it will affect transmission and reception of microwaves.
If there is a large amount of condensation, please purge the inside of antenna with dry air or N2 to blow away the condensation.

If object to be measured is powder or slurry, dust may be mixed with steam and adhere to inside of antenna. In that case, please use optional PTFE coated antenna. This has effect of using condensation to wash away the antenna surface.
However, in this case, condition is that there is always condensation. If it dries during use, it will not be as effective, so please be careful when using it.

 

＞＞Example of installation in hot spring tank｜Level measurement possible even when visibility is poor due to steam

 

＞＞Example of introduction to chicken manure silo｜Preventing adhesion and reducing cleaning work

River Water Level Transmitter comply with the Radio Law. The radio water level gauge is a product manufactured in accordance with the Radio Law's "Regulations for Weak Radio Stations."
However, the transmission power is lower than that of a microwave level meter, so it is not suitable for use with powders or lumps that have weak reflection. For liquid use only.

It depends on size and amount of foams.
It is difficult to say how much bubbles should be present as it varies depending on physical properties of object to be measured, but from experience we have learned that with foams the size of a soap foam (about 5 cm), the liquid level can be measured by passing through the surface. 
As an example of small foams, it is easy to understand if you think of fine foams that occur when sea is rough.

For foams close to this condition, we have a track record of measuring the foam surface but not being able to measure the liquid level.
In such cases, there are cases where problem was solved by using >> guide pipes (breakwater tubes), so please refer to them.

If you have any concerns, we can also conduct an on-site test using a demo machine. Please feel free to contact us. We do not accept changes in electrode dimensions.

The SN ratio is ratio of signal indicating strength of reflection to noise signal noise.
Microwaves (radio waves) are invisible. Therefore, we use PC software to visualize waveform and use it to understand situation and make adjustments.
At this time, on waveform there is a signal indicating strength of microwave (radio wave) reflection and noise generated during signal processing.
Value obtained by subtracting noise value from Signal value is called SN ratio, and this is an indicator of measurement stability. The standard for stable measurement is an SN ratio of 10 dB or more.

Set purge pressure to 100kpa and purge amount to 14㎥/h.

When the rope is broken, the "MES" indicator light will flicker.
The "POWER" indicator light flickers when the motor is overloaded.

We are preparing a Φ280 umbrella-shaped measuring weight. Compatible with particle size of 1mm or less.
Examples: carbon black, lime powder, collected dust, etc.

Can be used in powder, granular, and bulk. The shape of measuring weight may change depending on object to be measured.

Specific gravity ≧0.1.
Our track record includes wood processing powder.

Since AC power is supplied to the Sounding M's main unit from the board inside the controller, a shield is required as a noise countermeasure.

The contacts of the auxiliary relay in the circuit that lowers the weight may be oxidized by sparks, resulting in poor continuity.

We recommend a measurement interval of 30 minutes or more.
If measurements are taken frequently (measurement intervals are short), parts such as motors and wire ropes will deteriorate more quickly.
We recommend that you plan to regularly replace consumables.

We recommend a measurement interval of 30 minutes or more.
If measurements are taken frequently (measurement intervals are short), parts such as motors and wire ropes will deteriorate more quickly.
We recommend that you plan to regularly replace consumables.

 

Basically it's possible. However, we do not evaluate all equipment, so if you have any concerns, please use a preliminary evaluation such as by renting one out.

Basically it's possible. However, we do not evaluate all equipment, so if you have any concerns, please use a preliminary evaluation such as by renting one out.