Contact microwave moisture analyzer

Principle of Contact Microwave Moisture Meter:

Adopting the principle of high capacitance wave penetration. The difference in dielectric constant or relative dielectric constant of each material can be used to directly measure the dielectric constant of the relevant material and calculate the water content. Then output a standard signal (0-20mA or 0-10VDC) with the moisture content of the material as a percentage by mass. The relative dielectric constant of water, ε r=80, is about 1-10 for most other materials. For example, the ε r value of gravel is between 3-4. There is a significant difference in dielectric constant between water (80) and the material being measured (1-10), with a relative dielectric constant of ε r.
The higher the water or humidity content in the material, the closer the relative dielectric constant ε r value is to 80, making it easier to measure. Whether it is the tested material on a fast flowing production line or a stationary tested material, as long as the material passes through the sensor probe, the ε r signal can be measured, and the moisture measurement value can be calculated. Depending on the material and its properties, the sensor probe can measure depths ranging from approximately 150mm to 200mm.
The moisture measured and analyzed is the total moisture, which includes the core moisture and surface moisture of the tested material. The microwave principle measures the moisture inside and outside the material, and the sensor probe has high penetration, so the accumulated dirt on the surface of the material will not affect the measurement results.

Technical advantages:

1. Accuracy up to 0.1% to 0.02% (for different working conditions);

2. The probe has high wear resistance, corrosion resistance, and seismic resistance;

3. Fast measurement speed, response time of about 1 second;

4. No need for laboratory samples, online core moisture measurement;

5. The probe structure is sturdy and durable, ensuring long-term reliable operation;

6. High selectivity in sensitivity;

7. The installation method of the probe is flexible;

8. Improve product quality, suitable for automatic humidification or drying;

9. Equipped with automatic temperature compensation function;

10. All functional operations are very convenient;

11. The monitoring system has an integrated data recording device;

12. Maintenance free design.

Application fields:

• Food industry: grain, feed, flour, soybeans, malt, rapeseed, corn, beans, noodles, bean products, sugar, beet saccharification, beet flakes, candies, grain starch, coffee raw materials, food processing materials, fish meal, dried food, potato products, potato flour, chips, thin slice seasoning powder, milk powder, spices, nuts, etc;

• Building materials: sand/gravel quartz powder, sand, bricks (raw materials), ceramics (raw materials), mortar, etc;

• Chemical industry and pharmaceutical industry: powder, granule, tablet, pill, flake fertilizer, phosphate, salt, potassium fertilizer, washing powder, polystyrene, foam plastic;

• Synthetic materials PVC、 Acrylic based pigments, etc;

• Recycling: biomass, sludge, compost, etc;

• Others: woodworking shavings, sawdust, wood powder, carbide slag, coal, coke, coal powder, tobacco, tobacco leaves, casting sand, glass, ceramics, etc.

Wood industry/biomass: wood cutting, sawdust, pellet

Spiral conveyor installation

Short spiral - glass powder, ceramic powder, peat

Biomass and sludge

Food industry - apple pomace

Food Industry - Salt, Conveyor Belt and Slide Installation

Food Industry - Chocolate, Bread, Coffee Beans

Food Industry - Cream

Building materials - concrete, sand, gravel

Building material - REA gypsum, sensor installed on sled

Building materials - clay, sewage sludge, TFM1 compaction equipment (hydraulic compaction and control research department)

Steel Industry - Sintering Mixtures, Iron Ore

Mining Industry - Ash (Naturalization)

Chemical industry - Plastic pellets

Installation of drug screw conveyor

Electronic Industry - Adhesive

Advantages of installing on a screw conveyor

1. Compared to other installation positions, the measurement effect is better, the material flow state is relatively stable, and the measurement data is representative;

2. At the same time as measuring moisture content, it can monitor material temperature and control material drying or humidification;

3. Measurement is not affected by metal rotating blades, dust, or vibration, and has reliable operation;

4. The density of the tested material needs to remain relatively stable, with the lower part of the rotary feeder being 20-40. Better installation in the designated location;

5. Rabbit maintenance design