NameSolid moisture analyzer

summary:

Solid moisture analyzerUsing high-frequency capacitance technology to measure the core moisture and surface moisture content in materials.
It has been successfully applied to many manufacturing processes, including coal, sugar, tobacco, grains, malt, flour, sand, shavings, dried foods, fertilizers, pigments, plastic pellets, additives and supplementary materials in the manufacturing process, papermaking, construction or food industries, etc. It is particularly suitable for installation on belt conveyors, screw feeders, warehouses, funnels, and conveyor pipelines, and can also be used for online humidity measurement in batch production processes.

Advantage:
Accuracy up to 0.1%, maximum 0.02% (for different working conditions);
Sensors have high wear resistance, corrosion resistance, and earthquake resistance;
Fast measurement speed, response time of about 1 second;
No need for laboratory samples, online core moisture measurement;
The sensor structure is sturdy and durable, ensuring long-term reliable operation;
The selectivity of sensitivity is very high;
The installation method of sensors is very flexible;
● Improve product quality, suitable for automatic humidification or drying;
● Equipped with automatic temperature compensation function;
All functional operations are very convenient;
The monitoring system has an integrated data recording device;
● Maintenance free design.

Depending on the material and its properties, the sensor probe can measure depths ranging from approximately 150mm to 200mm. The total moisture of the product, which includes the core moisture and surface moisture of the material, will be measured and analyzed. Measuring the surface moisture of materials better than optical principles, sometimes the surface moisture is not the true value. Sensors have high penetrability, so the accumulation of dirt on the surface of the material does not affect the measurement.

The change in dielectric constant or relative dielectric constant of each material is an important measurement principle (MuTec high-frequency capacitor). To better understand the working principle, here is a very simple explanation:

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. This means that there is a significant measurable difference in the relative dielectric constant ε r between water (80) and the material being measured (1-10).

Based on this difference, the moisture content of the relevant materials can be directly measured. Then output in the form of a standard signal (0-20mA or 0-1OVDC) with the moisture content of the material as a percentage by mass.

In other words, the more water or moisture is contained in the material, the closer its relative dielectric constant ε r value is to 80.

Online real-time measurement, when the material passes through the sensor, the measured ε r signal can be obtained, even on a fast-moving production line, the measurement of stationary solid materials is also possible.

Technical data of the host of the online moisture analyzer rapid analysis system:

Structure E

19 "- Plug in 3HE/42 TE, weighing approximately 2000g.
Structure T

The tabletop shell is B236 x H132 x T330mm, with a weight of approximately 4500g.
Structure F

On site -/wall mounted casing, B265 x H240 x T250mm, weighing approximately 6500g, with observation door, IP65。
instruction

1/4 VGA-LC monitor with dimensions of 100 x 77mm and 320 x 240 pixels. Suitable for measuring and displaying analog and digital signals.
monitor

Date, time, product type, temperature, residual value, humidity or dehydrated substance value, minimum and maximum alarm values, analog bar graph display, pointer, measurement deviation width (including enhanced display of measurement deviation width, digital indication, maximum/minimum limit values, and soft key instructions).
Humidity measurement range

Zui low 0000-0100%, Zui large 0,0-100%, with 1-, 2-, or 3 decimal places.
Temperature measurement range

The smallest: 0-5 ℃; Maximum temperature: 0-120 ℃.
precision

Zui is 0.02% larger, meeting all material requirements for measurement.
filtering time

0-999 seconds
memory

User memory, suitable for storing parameters of 24 different products.
Data Recorder

It can store up to 10 years of historical record values, and the real-time clock is used to save measurement records.
analog output

Product humidity measurement values: 0/4-20/22mA or 20/22-0/4mA (load 750 Ω), 0/2-10/11V or 10/11-0/2V; product temperature measurement values: 0/4-20/22mA or 20/22-0/4mA (load 750 Ω), 0/2-10/11V or 10/11-0/2V.
Analog input

MA - and PT 100- Input
Digital Output

1. Relay output: The normally open and normally closed contacts of each of the smallest and largest alarm relays. Switching voltage: 125V AC 110V DC; Switching current: maximum 1.5A;
2. Transistor output: 2x electrical isolation, switch voltage:<28V DC, switch current:<50mA.
digital input

2x electrical isolation, control voltage: 8-36V DC, control current: 2-14mA.
interface

Standard RS232 and RS485
power supply

Power supply circuit 1:230V AC or 115V AC (50-60Hz), -15% to 10%; Power supply circuit 2 (backup): 24V DC or 24V AC (50-60Hz), ± 25%.

Online moisture analyzer rapid analysis system sensor technology data:

humidity sensor

FMS 400 K measurement surface PTFE
FMS 400 C measurement of surface ceramics
Protection level

IP67， Compliant with EN 60529.
connection

4-wire system
Cable

0.25~0.5mm; maximum length 1200 meters X 0.75mm
process temperature

-10 ℃~90 ℃ (special customized high temperature type: 180 ℃)
Storage temperature with cooling

-10 ~ 80℃
response time

1 second
power consumption

0.4 watts
Signal

RS485
Load Pressure

6Bar
Shell

Stainless steel 1.4307
weight

1,000g
explosion-proof

Suitable for regional type 20 and type 0 (EU explosion-proof certification)
Application areas of online moisture analyzer rapid analysis system:
Food and semi luxury goods: grains, provisions, 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, flakes, seasoning powder, milk powder, spices, nuts, etc;
Building materials: sand/gravel quartz powder, sand, bricks (raw materials), ceramics (raw materials), mortar, etc;
● Chemical and pharmaceutical industry: powder, particle, 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;
Other: woodworking shavings, sawdust, wood powder, carbide slag, coal, coke, coal powder, tobacco, tobacco leaves, casting sand, glass, ceramics, etc.

It is very suitable to install the humidity sensor on the spiral conveyor, because the measured material is continuously guided to the sensor by the spiral blades, and the material is relatively uniform. The humidity sensor must be installed under the screw conveyor.

Advantages of installing on a screw conveyor
Compared to other installation positions, the measurement effect is the best, the material flow state is relatively stable, and the measurement data is more representative;
2. It can monitor the temperature of the material while outputting the measured moisture value, and control the drying or humidification of the material;
3. The measurement is not affected by metal rotating blades, dust, or vibration, and has extremely high reliability;
4. The density of the tested material needs to remain relatively stable, with the lower part of the rotary feeder being 20-40. The best location for installation;
5. Rabbit maintenance design.

Application on belt conveyors
Designed for continuous humidity measurement on production lines. The prerequisite for accurately measuring the humidity of bulk materials is to choose the correct location to install the humidity sensor. It is necessary to ensure that the measured material fully contacts the sensor measurement surface and that the material thickness is as thick as possible.