NIR Moisture Analyzer Online Near Infrared Moisture Meter Online Moisture Sensor for Moisture Change Measurement
Description
Type:
Testing Machine
Accuracy Class:
High Accuracy
Accuracy:
/
Application:
Auto Testing
Customized Support:
OEM, ODM, OBM
Power:
---
Protection Class:
IP67
Voltage:
220 V
Warranty:
1 Year
Number Of Channels:
50
Working Distance:
250mm~450mm
Machine Weight:
4kg
Power Supply:
AC 90-220V 50/60hz
Highlight:
NIR moisture analyzer online sensor
,
near infrared moisture meter
,
lab moisture change measurement sensor
NIR Moisture Analyzer Online Near Infrared Moisture Meter Online Moisture Sensor for Moisture Change Measurement
Near-infrared Moisture Testing Principle:
The molecular structure of substances, such as oxygen-hydrogen bonds in water and carbon-hydrogen bonds in organic matter, absorbs near-infrared light of specific wavelengths. At a specific wavelength, the reflected near-infrared energy is inversely proportional to the number of molecules that absorb it. Moisture analyzers analyze changes in near-infrared energy at a specific wavelength based on the principle that near-infrared wavelengths are absorbed by water molecules.
Water molecules are not static: they vibrate when they encounter specific energy bands. The bonds between two hydrogen atoms and an oxygen atom in a water molecule can stretch, contract, or twist in other ways. External energy is required to induce these vibrations, and this energy needs to span a specific band of the entire electromagnetic spectrum.
At different parts of the spectrum, some absorption bands are very strong, while others are very weak. In the near-infrared region of the spectrum, this band is particularly strong for water molecules, and the instrument is also easier to implement in terms of emitting, filtering, and receiving this energy. Specific wavelengths of near-infrared light energy are used to provide the appropriate amount of energy to the moisture in the product being measured. Generally, the wavelengths used to measure moisture are kept in the range of 1 to 2.5 micrometers. The amount of energy absorbed at a specific wavelength depends on the number of water molecules encountered by the near-infrared energy beam and the absorption intensity at that specific wavelength. The number of water molecules encountered by the energy beam is directly proportional to the water content of the substance being measured. At the same time, because the moisture meter uses reflectance, the measured beam is also affected by the reflection and absorption characteristics of the substance being measured. Near-infrared moisture measurement technology is a non-destructive, non-contact, real-time moisture detection technology.
The online infrared moisture analyzer focuses a beam of near-infrared light of multiple wavelengths onto the surface of the object being measured. The beam of near-infrared light reflected from the surface is received and processed by an advanced infrared optical detection system. This advanced infrared optical detection system can process data rapidly. An embedded, high-performance miniature digital signal processing chip is used to process, store, and display the required data, with outstanding accuracy and stability.
Online infrared moisture analyzers use precision infrared filters mounted on a rotating wheel. This mounting allows pulses of reference and measurement light to alternately pass through the filter. The retained beams are then focused onto the sample being tested. First, the reference light is projected onto the sample, followed by the measurement light. These two sequential light pulses are reflected back to a detector, where they are sequentially converted into two electrical signals. The reference channel represents the expected amount of reflected energy. The measurement channel has a portion of its energy absorbed by water molecules, thus attenuating its energy. These two signals are combined to form a ratio. This ratio, compared to other ratios obtained from samples with different moisture contents, is directly proportional to the difference in moisture content between the two samples.
The signal strengths of the two channels are combined into the following equation: R / M x M1 / R1 = Ratio
Where R represents the reference channel of the product beam, M represents the measurement channel of the product beam, M1 represents the measurement channel of the compensation beam, and R1 represents the reference channel of the compensation beam.
If a drift condition occurs, such as a change in the intensity of light at the measurement wavelength, the values of M and M1 will be affected simultaneously and proportionally. For the ratio, the results are canceled out. However, if the amount of water in the sample changes, only the M value is affected, and the result shows a significant change in moisture content.
Instrument Features
1. Near-infrared non-contact testing: Real-time display of moisture content changes on the production line. No sample pretreatment is required. Samples in enclosed spaces can also be tested by penetrating colorless glass (transmittance greater than 95%), ensuring sample integrity and compliance with testing environment requirements.
2. Simple instrument operation: After installation at the required testing location, take a sample near the test point and perform laboratory standard method moisture testing. Calibration is completed by comparing the standard method test data with the instrument data and adjusting the translation and sensitivity parameters.
3. Strong anti-interference capability: The probe has an automatic temperature compensation function, so changes in ambient temperature have minimal impact on measurement accuracy. Instrument performance is unaffected by various ambient light variations, eliminating the need for a light shield. A standard sintered filter dust cover is included, and connecting to an air source eliminates interference from trace amounts of dust and moisture.
4. The probe has a built-in MCU, employing fully digital processing with strong optical signal processing capabilities. It has a higher ability to identify light-absorbing materials such as black materials and also adds visible light signal measurement, significantly reducing the impact of color changes and enhancing its adaptability to complex testing environments.
5. Diverse input/output interfaces: Free protocol/MODBUS-RTU (read/write, supports remote parameter modification and calibration); RS485 (three channels), DC4-20MA (one channel), IO input/output, two input channels (input stop signal to stop measurement), two 24V output channels, and an alarm light can be added.
6.Stable and reliable: Utilizes a waterproof power supply module, aluminum alloy casing, IP67 rating, AC 90-220V 50/60Hz global voltage adaptive. The probe is powered by DC24V, which is safer, more stable, and effectively reduces the failure rate. The lamp is powered by DC5V regulated, with a slow voltage rise when powered on and protection for the lamp when switching on and off.
NIR Moisture Analyzer Online Near Infrared Moisture Meter Online Moisture Sensor for Moisture Change Measurement
Technical Specification
Equipment Model
LR-300HW
Applicable Materials
Uniform moisture content and continuous material supply
Probe Glass
High-bay quartz glass is used to prevent stains and moisture from adhering.
Measuring range
0-90% (The maximum measurement range is when the material is saturated with water. For example, paper can reach 50%, sintered steel is around 18%, and pure metal powder cannot absorb water and therefore 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 LED display, 4 buttons, 8 status lights (for direct determination of probe communication and other statuses)
Spot Diameter
50mm(varies with distance)
Measurement Speed
0.125 seconds (after stabilization
Detector
Add filter packaging to avoid interference from external light
Calibration and Adjustment
Quick calibration and pre-calibration, no need for daily recalibration
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