| General-purpose moisture meter |
What to measure |
Measurement range
(%H 2 O) |
Measurability |
calibration curve
graph |
remarks |
| Glass, Ceramics, Cement |
Pottery clay, tile raw materials |
0～12 |
○ |
|
calibration curve is a gentle quadratic equation. Measurements can be performed until the water floats.
With molded products, there is no correlation between moisture on the surface and inside, so it cannot be measured. |
| Bricks and refractory materials |
0～10 |
○ |
|
calibration curve differs depending on product. Measurement is possible if the particle size is fine.
Black is reflective and may not be measurable due to insufficient sensitivity. |
| Iron Ore and Metals |
Ferronickel Ore |
10～30 |
○ |
|
Measurements of lump samples vary depending on the surface condition, making them impossible to measure.
The accuracy of powder samples improves with improved uniformity. |
| bauxite |
0～20 |
○ |
|
It is a brownish-brown crushed powder with sufficient sensitivity for measurement. |
| Ferrite |
0～20 |
○ |
|
Depending on constituent it may be a cubic equation.
If there is a lot of moisture and it becomes clayey, the sensitivity is insufficient and measurement is not possible. |
| Aluminum hydroxide |
0～15 |
○ |
|
The reflectance is good and the sensitivity is sufficient, but calibration curve differs depending on the type.
If there is a lot of moisture, the output will saturate and measurement will be impossible due to insufficient sensitivity. |
| coal |
0～15 |
○ |
|
calibration curve is often a gentle quadratic or cubic equation, and the blend ratio remains almost constant, so in many cases only one bottle is sufficient.
The inflection point varies depending on the type of coal. |
| Blended (sintered) raw materials |
0～10 |
○ |
|
It is usually dark brown in colour, has a grain size of less than 5mm and has low reflectivity.
Some calibration curve are linear, while others are S-shaped curves. |
| iron oxide |
0～10 |
○ |
|
If the grain size is coarse (10 to 15 mm or more), there will be a lot of variation in the data and measurement will be impossible. |
| Serpentine |
0～15 |
○ |
|
Dark green rock mixed into sintering materials for desulfurization. Moisture content over 10% is measured with a high moisture type meter. |
| Food |
Wakame seaweed |
0～30 |
○ |
|
Measurement is possible for dried wakame with low moisture. |
| Starch (corn starch) |
0～25 |
○ |
|
A white powder with sufficient measurement sensitivity. Since it contains water of crystallization, it forms a loose quadratic equation. |
| Rice bran |
0～25 |
○ |
|
calibration curve has a large output change and is slightly quadratic. |
| Wasabi |
0～12 |
○ |
|
calibration curve differ slightly depending on the particle size. |
| jam |
20～35 |
× |
|
There is no correlation between surface and internal moisture and measurement is not possible. |
| Fish meal |
0～15 |
○ |
|
It has good sensitivity and can measure with little variation. |
| Breadcrumbs |
0～20 |
○ |
|
When moisture is 15% or less, the output changes greatly in response to changes in moisture, and measurement accuracy is also good. |
| Soy flakes |
0～15 |
○ |
|
The output changes greatly in response to changes moisture, making it possible to measure them. |
| seaweed |
0～15 |
○ |
|
The output changes greatly in response to changes moisture, making it possible to measure them. |
| tea |
0～15 |
○ |
|
Products in their dried state have good sensitivity and can be measured.
Freshly picked fruit with high moisture will have variable output. |
| Powdered milk |
0～5 |
○ |
|
Both reflectance and sensitivity are good, and precision and repeatability are almost the same as for sugar and salt.
calibration curve is a gentle quadratic equation. |
| butter |
0～20 |
× |
|
There is no correlation between surface and internal moisture and measurement is not possible. |
| sugar |
0～2 |
○ |
|
With high reflectivity, it is one of the most accurate targets for moisture meter measurement.
calibration curve is nearly linear. |
| salt |
0～2 |
○ |
|
With high reflectivity, it is one of the most accurate targets for moisture meter measurement.
calibration curve is a gentle quadratic equation. |
| Seasoning (fried chicken powder) |
10～30 |
○ |
|
The particle size is small and the reflectance is good, allowing for accurate measurements.
calibration curve is a gentle quadratic equation. |
| Chemical |
Catalyst (aluminum oxide) |
0～10 |
○ |
|
Both reflectance and sensitivity are good. |
| Cultivation soil |
0～20 |
○ |
|
calibration curve extends linearly until the water floats and becomes muddy.
The saturation point varies depending on the type, but measurements are possible up to that point. |
| Detergent, soap powder |
0～15 |
○ |
|
Good reflectance allows for stable measurements.
calibration curve is quadratic. |
| Synthetic resin (powder) |
0～10 |
○ |
|
Generally, it is white and powdery, and has sufficient sensitivity.
However, be careful as moisture may be extremely low.
They are broadly classified into thermosetting resins and thermoplastic resins. |
| ABS powder |
0～40 |
○ |
|
Generally, it is white and powdery, and has sufficient sensitivity.
However, be careful as moisture may be extremely low. |
| Acrylic Polymer |
0～10 |
○ |
|
Good reflectance allows for stable measurements.
calibration curve is quadratic. |
| Pigments |
0～5 |
○ |
|
Both reflectance and sensitivity are good. |
| Fertilizers, pesticides |
0～5 |
○ |
|
calibration curve differs depending on the type.
There are cases where constituent other than moisture and visible wavelengths are included and multiple regression computation are performed. |
| Rubber and Fiber |
Staple cotton |
0～15 |
○ |
|
White color provides sufficient sensitivity, and surface irregularities must be reduced.
There are examples where measurements were taken by pressing glass against it. moisture is unevenly distributed, resulting in large variations. |
| Glass Fiber |
0～15 |
○ |
|
calibration curve differs between thin and thick materials.
It is not hygroscopic and has a lot of surface moisture, so it may become a high moisture type meter. |
| Vinylon Fiber |
0～7 |
○ |
|
calibration curve differs depending on product. |
| Acrylic Fiber |
0～7 |
○ |
|
When there is a lot of moisture, the water becomes unevenly distributed and the variation becomes greater. |
| Others |
Pulp Sheet |
10～30 |
○ |
|
When there is a lot of moisture, the water becomes unevenly distributed and the variation becomes greater. |
| Wood powder, sawdust |
0～30 |
○ |
|
Both the reflectance and sensitivity are good, and calibration curve differ slightly depending on the type. |
| Wood chips (fine) |
0～30 |
○ |
|
The finer the sample, the less variation there is. |
| Wood chips (coarse) |
0～30 |
○ |
|
Although there is some variation compared to fine samples, it is still measurable. |
| Fly ash (incineration ash) |
0～30 |
○ |
|
Both the reflectance and sensitivity are good, and calibration curve differ slightly depending on the type. |
| Coke breeze |
0～10 |
○ |
|
It is black in color and has low reflectivity, but it has fine grain and is sensitive.
Measurements can be taken until the water floats. |
| paper |
2～12 |
○ |
|
It has good reflectivity, enables stable measurement, and high accuracy.
calibration curve is a gentle quadratic equation. |
| Coated Paper |
2～12 |
○ |
|
It has good reflectivity, enables stable measurement, and high accuracy.
calibration curve is a gentle quadratic equation. |
| high moisture type Analyzer |
Wall material raw materials |
5～15 |
○ |
|
Measurements can be performed on samples containing pulp, cement, etc.
We have experience in using multiple regression computation by switching calibration curve depending on the color or by using a visible/infrared hybrid moisture meter. |
| Particle Chip |
30～80 |
○ |
|
Both reflectance and sensitivity are good.
calibration curve differ slightly depending on the type and whether or not adhesive is used. |
| Paper (wet) |
40～70 |
○ |
|
There are many examples of papermaking lines where a reflective fiber optic measuring system is installed at the exit of the wet part (dryer entrance) to measure.
Mirror type is not possible as the site becomes very hot. |
| Rice (after cooking) |
50～70 |
× |
|
There is no correlation between surface and internal moisture, making measurement impossible. |
| Fresh bread crumbs |
30～40 |
○ |
|
The high moisture content reduces sensitivity and reduces accuracy.
Measure with a high moisture type meter. |
| clay |
0～30 |
○ |
|
calibration curve is almost linear. Measurements can be performed until the water floats.
With molded products, there is no correlation between moisture on the surface and inside, so it cannot be measured. |
| baking soda |
0～18 |
○ |
|
There is usually an inflection point around 18% H2O, so measurements above that are not possible.
It contains a lot moisture because it contains water of crystallization. It is used in glass, fire extinguishing agents, medicine, cleaning agents, etc. |
| Ammonium chloride |
10～30 |
○ |
|
Measured with a high moisture type meter. |
| Granulated serpentine |
0～15 |
○ |
|
Because there is a lot of surface moisture, it is measured using a high moisture type meter. |
| Glass particles |
0～10 |
○ |
|
The particle size is small and the reflectance is good, allowing for accurate measurements.
Since it is not hygroscopic but has a lot of surface moisture, it is measured using a high moisture type meter. |
| Silica sand |
0～10 |
○ |
|
The particle size is small and the reflectance is good, allowing for accurate measurements.
Since it is not hygroscopic but has a lot of surface moisture, it is measured using a high moisture type meter. |
| Lime, limestone |
0～10 |
○ |
|
Particle sizes of φ30mm or more vary widely and cannot be measured. |
| Trace moisture Analyzer |
ABS powder |
0～1 |
○ |
|
White powder with sufficient sensitivity.
Be careful as moisture content may be extremely low. |
| PVC powder |
0～1 |
○ |
|
calibration curve varies depending on the type and particle size.
The precision required is strict. |
| Granular Ferrite |
0～0.5 |
○ |
|
It is a fine brown to black powder that has a low measurement range after drying.
calibration curve is nearly linear. |
| Manganese dioxide |
0～2 |
○ |
|
The reflectance is extremely poor, the sensitivity is insufficient, and depending on moisture range, measurement may not be possible. |
| iron oxide |
0～1 |
○ |
|
It is a fine brown to black powder that has a low measurement range after drying.
calibration curve is nearly linear. |
| Sodium Acetate |
0～1 |
○ |
|
It is also called anhydrous sodium acetate.
It is a colourless crystal that dissolves easily in water. |
