Description
Near-infrared moisture measurement is a non-contact measurement. Compared with traditional methods, it has the advantages of being easy to use, not requiring contact with the product, and effectively improving testing efficiency. With near-infrared analysis, all manual steps of collecting, drying, and accurately weighing samples are eliminated. The measured real-time data can be fed directly into the plant’s control system for process control.
The QL-300HW online moisture meter can ignore material height or color and provide continuous, reliable readings. After a one-time calibration on the production line for your specific application, subsequent calibrations and maintenance are virtually unnecessary.
The QL-300HW online moisture meter can be installed in multiple locations, such as before and after the drying box and above the belt conveyor. It helps manufacturers identify problems and make immediate changes without stopping production, increasing productivity and reducing production losses.
Technical Parameters
| Model | QL-300HW |
| Applicable Products | Products with uniform moisture content and uninterrupted delivery |
| Probe Glass | Use high-bay quartz glass to avoid stains and moisture adhesion. |
| Measuring Range | 0-90% (Material water absorption saturation is the maximum measurement range. For example: paper can reach 50%; steel sintering is about 18%; pure metal powder cannot absorb water and cannot be measured) |
| Measurement Accuracy | 0＜Moisture content≤1%, Q≤±0.1%; 1%＜moisture content≤15%, Q≤±0.2%; 15%＜moisture content≤30%; Q≤±0.5%; (The corresponding measurement accuracy can only be achieved when the material composition is the same) |
| Resolution | 0.1%/0.01%/0.001% (optional) |
| Display Content | 5-digit digital tube, 4 buttons, 8 status lights (directly determine various status of the probe) |
| Spot Diameter | 50mm (varies with distance) |
| Measuring Speed | 0.125 seconds (after stabilization) |
| Detector | Add filter package to avoid external light interference |
| Calibration and Adjustment | Quick calibration; pre-calibration; no need for daily re-calibration |
| Signal Output | RS485, 4-20mA analog signal |
| Protocol | Free protocol/MODBUS-RTU (read and write, supports remote modification of parameters and calibration); three Rs485 channels in total |
| Number of Channels | 50 |
| Operating Temperature | -10℃～50℃ |
| Working Distance | 250mm～450mm |
| Working Power Supply | Waterproof power supply module: AC 90-220V 50/60hz global voltage adaptive; output DC 24V; |
| Dust and Vapor Proof (trace amount) | Standard sintered filter element dust cover (users prepare air source by themselves) |
| IP Rating | IP67 |
| Weight | Probe: 6kg; Host: 4kg; |
| Mounting Brackets | Customers need to customize it according to the conditions of the work site. The diameter of the installation round pipe is 25-32mm. |
Feature
- Non-contact measurement.
Measure the moisture content changes of the product in real time on the production line without pre-processing the product. Even products in enclosed spaces can be measured by penetrating colorless glass (light transmittance greater than 95%).
- Easy to use.
Install at the location where measurement is required. Take a sample near the test point and measure the moisture content using a laboratory standard method. Then compare the test data with the instrument data, adjust the translation amount and sensitivity parameters to complete the calibration. Online moisture analyzer starts to operate normally.
- Strong anti-interference ability.
The probe has the function of automatically compensating for temperature effects, and changes in ambient temperature will basically not affect the measurement accuracy.
The performance of the instrument is not affected by changes in ambient light, and there is no need to install a hood on the probe during use.
Equipped with a sintered filter element dust cover, which can eliminate interference from trace amounts of dust and water vapor after the air source is connected.
- The probe has a built-in MCU.
It adopts fully digital computing and has strong light signal processing capabilities, making it more capable of judging light-absorbing materials such as black.
It also adds visible light signal measurement, which effectively reduces the impact of color changes and improves the instrument’s adaptability to complex test sites.
- Diversified output and input interfaces；free protocol/MODBUS-RTU (read and write, supports remote modification of parameters and calibration).
Rs485 (three channels);
DC4-20MA (one channel);
IO input and output: 2 channels of input, input stop signal to stop Measurement; 2-way 24v output, alarm light can be installed.
- The quality is stable and reliable.
It adopts waterproof power supply module, aluminum alloy shell, IP67 grade, AC 90-220V 50/60hz global voltage self-adaptation.
The power supply of the probe is DC24V. The low-voltage power supply is safer and more stable, and can effectively reduce the failure rate.
The power supply of the light source is DC5V. When the power is turned on, the voltage slowly increases, and the light source is protected when turning on and off.
