Can the LWM-A12 measure the whiteness of powders?

Labtron LWS-A12 is fully capable of measuring the whiteness of a wide range of powders. It is designed to handle fine particulate samples and provides reliable and accurate readings under normal testing conditions. Specifically, powders with particle sizes approximately between 120 µm and 200 µm fall well within the operational capability of the instrument. However, samples that are exceptionally coarse—such as those resembling the size of rice grains or beans—may not yield accurate readings and are generally not recommended for whiteness measurement using this device.

Does the standard configuration of LWM-A12 include calibration material?

Yes, the standard package of the Whiteness Meter LWS-A12 includes calibration material. This material allows users to perform routine checks and adjustments to ensure measurement consistency and accuracy. You can use it to verify that your device is stable before conducting your whiteness measurements, even though a formal certificate is not provided.

Can whiteness meter LWM-A12 be integrated into production lines for inline measurement?

Yes, Labtron supplies advanced whiteness meter LWM-A12.These systems often feature conveyor integration or robotic positioning and provide real-time feedback for process control. Inline meters typically share core measurement principles with benchtop models but are ruggedized and designed for continuous operation. They include automated calibration routines, UV compensation, and centralized data logging to maintain quality without manual intervention—making them ideal for large-scale manufacturing.

How do user prepare powder or granule samples for whiteness testing?

Labtron supplies advanced whiteness meter LWM-A12. For powders, starch, sugar, or granules, compaction into a tablet or insertion into a powder sample holder is required before measurement. Ensure homogeneous particle size and consistent packing density to avoid air gaps and uneven surface reflection. Many instruments specify sample mass (e.g., ??5?g) and container dimensions to standardize readings. Thorough shaking and leveling of the powder improves repeatability, and cleaning the aperture after each measurement prevents residual interference

Whiteness Meter LWM-A12

Name: Whiteness Meter LWM-A12
Brand: Labtron
SKU: LWM-A12
Rating: 4.7 (629 reviews)

Whiteness meter LWM-A12 features a low zero drift of ≤ 0.1 %, which ensures precise and reliable measurements even during extended operation and repeated testing. The compact, advanced circuit design ensures the accuracy and stability of measurement data. It measures ISO (R457) whiteness and fluorescence whitening of the materials. Our whiteness meter is provided with light absorber to eliminate the influence of specular reflection of the sample.

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Sample (size) length	Diameter ≥30 mm, Thickness ≤ 40 mm
System	D/0 lighting geometrical viewing conditions, diffuser diameter (d) 150mm, testing hole diameter 30mm
Light source	D65 as illuminating source
Zero drift	≤ 0.1 %
Indication drift	≤ 0.1 %
Indication error	≤ 0.5 %
Repeatability error	≤ 0.1 %
Mirror reflection error	≤ 0.1 %
Dimension (LWH)	360 × 264 × 400 mm
Net weight	20 kg
Power supply	220 V ± 10 %, 50 Hz

Stimulated D65 illumination
D/0 Viewing Geometry
Brightness Value Determination
Opacity Measurement Capability
Transparency Determination Function

Whiteness Meter LWM-A12 quantifies a surface or powder’s whiteness by measuring blue-light reflectance. It plays a key role in ceramics, chemical material, printing inks and dyeing industries for ensuring uniform whiteness.

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Whiteness Meter LWM-A12 Catalog

Available Range :

Tensile Stiffness Tester TP-B10 : 38×70 mm Whiteness and chromaticity tester LWACT-A10 : Diameter ≥30 mm, Thickness ≤ 40 mm

Models of Paper Testing Instruments

Labtron Paper Testing Instruments requires air supply for automatic clamping, ensuring smooth and secure operation. These provide real-time pressure curve displays, allowing users to monitor pressure changes instantly. Their over-range reset function protects the sensor by automatically adjusting it in case of excessive readings. They measure ink absorption values, useful for quality control in printing processes. Our paper testing instruments measure WH Hunter whiteness, YI yellowness, and CIE whiteness for precise color and whiteness evaluations for various applications.

Electronic Tear Tester LET-A10

Measuring Range : 10 to 64000 mN
Power of Resolution : 0.1 mN
Test Accuracy : ± 1%
Tearing Force Arm : 104 ± 1 mm

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Coefficient Of Friction Tester LCOFT-A10

Force Measuring Range : 0 to 2 N (customizable)
Accuracy : 0.5 level
Sample Thickness : Up to 2 mm (customizable)
Coefficient Measurement Range : 0.001 to 0.999

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Pulp beating (refining) freeness tester TP-C10

Measurement range : 0 to 100° SR
Sealed testing speed : 100 ± 10 mm/s
Volume of distilled water : 1000 ± 5 ml
Draining time : 149 ± 1 s

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Paper and cardboard thickness meter TP-E21

Measuring range : 0 to 20 mm
Accuracy : 0.01 mm
Gauge : Analogue gauge display
Contact pressure (to create false weight) : 20 ± 0.5 kPa

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Softness tester TP-H10

Measurement range : 10 to 1000 mN
Division value : 1 mN
Accuracy : ±1%
Indicating error : ≤0.5

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Electronic bending stiffness tester TP-E10

Testing speed : 200° ± 20° / min
Test range : 1 to 10000 mN
Indicating Error : ± 1 %
Testing length : 5, 10, 15, 20, 25, 50 mm

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Crush tester TP-L10

Measurement range : 5 to 500 N, 50 to 3000 N
Resolution : 1 N
Accuracy : ± 1 %
Variability : ≤ 1 %

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Carton compression tester TP-I10

Measuring range : 0.1 to 10 kN
Indication error : < ± 1%
Platen Size : 500×500 mm (customized)
Operating stroke : 500 mm (customized)

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Whiteness Meter LWM-A12 FAQ's

Labtron LWS-A12 is fully capable of measuring the whiteness of a wide range of powders. It is designed to handle fine particulate samples and provides reliable and accurate readings under normal testing conditions. Specifically, powders with particle sizes approximately between 120 µm and 200 µm fall well within the operational capability of the instrument. However, samples that are exceptionally coarse—such as those resembling the size of rice grains or beans—may not yield accurate readings and are generally not recommended for whiteness measurement using this device.
Yes, the standard package of the Whiteness Meter LWS-A12 includes calibration material. This material allows users to perform routine checks and adjustments to ensure measurement consistency and accuracy. You can use it to verify that your device is stable before conducting your whiteness measurements, even though a formal certificate is not provided.
Yes, Labtron supplies advanced whiteness meter LWM-A12.These systems often feature conveyor integration or robotic positioning and provide real-time feedback for process control. Inline meters typically share core measurement principles with benchtop models but are ruggedized and designed for continuous operation. They include automated calibration routines, UV compensation, and centralized data logging to maintain quality without manual intervention—making them ideal for large-scale manufacturing.
Labtron supplies advanced whiteness meter LWM-A12. For powders, starch, sugar, or granules, compaction into a tablet or insertion into a powder sample holder is required before measurement. Ensure homogeneous particle size and consistent packing density to avoid air gaps and uneven surface reflection. Many instruments specify sample mass (e.g., ??5?g) and container dimensions to standardize readings. Thorough shaking and leveling of the powder improves repeatability, and cleaning the aperture after each measurement prevents residual interference