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Whiteness Meter LWM-A12

Whiteness Meter LWM-A12

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 (L*W*H) 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.

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.

Vertical Tensile Tester LVTT-C10

Vertical Tensile Tester LVTT-C10

  • Maximum Measuring Range : 1KN
  • Control Method : Full computer control mode, powerful software
  • Unit of Force : N, kN, gf, kgf, lbf, kP, tf(SI), tf (long)...
  • Unit of Length : Mm, cm, Inch, m, km, um..
Vertical Tensile Tester LVTT-D10

Vertical Tensile Tester LVTT-D10

  • Capacity (MAX) : 1KN (optional 10N~1KN force sensor)
  • Control Method : Full computer control mode, powerful software
  • Unit of Force : N, kN, gf, kgf, lbf, kP, tf(SI), tf (long)...
  • Unit of Length : Mm, cm, Inch, m, km, um..
Whiteness and chromaticity tester LWACT-A10

Whiteness and chromaticity tester LWACT-A10

  • Sample (size) length : Diameter ≥30 mm, Thickness ≤ 40 mm
  • Measurement mode : Diffuse reflection factor Rx, Ry, Rz, stimulus value Y10, X10, Z10, chromaticity coordinates x10, y10, z10; lightness L *, chroma a * b *, chroma C * ab, hue angle h * ab, dominant wavelength λd, excitement purity Pe, color difference ΔE * ab, lightness difference ΔL *, chroma difference ΔC * ab, hue difference ΔH * ab, Hunter system L , A, b
  • Stability : ≤ 0.1 within 30 min
  • Accuracy : Chromaticity co-ordinate 0.0001
Coefficient Of Friction Tester LCOFT-A10
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
Paper tearing tester TP-J20
Paper tearing tester TP-J20
  • Measuring range : 0 to 1000 mN
  • Resolution : 0.1 mN
  • Indication error : ± 1 %
  • Tearing arm : 104 ± 1 mm
Mullen Burst Tester LMBT-A12

Mullen Burst Tester LMBT-A12

  • Measuring Range : Standard: 50 to 1200 kPa (paper) Optional: 250 to 5600 kPa (paperboard)
  • Indicating Accuracy : Up to ± 0.5%
  • Resolution : 0.1 kPa
  • Clamping Force : 400 kPa to 1200 kPa (adjustable)
Vertical Tensile Tester LVTT-D13

Vertical Tensile Tester LVTT-D13

  • Capacity (MAX) : 5KN (10N, 20N, 50N, 100N, 200N, 500N, 1KN, 2KN, 5KN sensors available)
  • Control Method : Full computer control mode, powerful software
  • Unit of Force : N, kN, gf, kgf, lbf, kP, tf(SI), tf (long)...
  • Unit of Length : mm, cm, Inch, m, km, um..
Paper and cardboard thickness meter TP-E20

Paper and cardboard thickness meter TP-E20

  • Measuring range : 0 to 4 mm
  • Accuracy : 0.01 or 0.001 mm
  • Gauge : Analogue gauge display
  • Contact pressure (to create false weight) : 100 ± 10 kPa
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

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Labtron Equipment Ltd., Quatro House, Lyon Way, Camberley, Surrey GU16 7ER United Kingdom

Email: info@labtron.com Whatsapp: +44 73 4441 2688 Phone: +44 2080 043608

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