LS117 Optical Density Meter

Visible Light Transmittance + Optical Density

Visible light: 380nm-760nm (Full Weighted Spectrum)
Suitable for opalescent translucent materials and frosted matte materials such as zirconia, opalescent acrylic, etc.

Request A Quote Buy Now

Linshang LS117 densitometer is an instrument that can measure both optical density and light transmittance. The instrument adopt the diffuse transmission principle which is suitable for the optical density test of aluminized film, film, X-ray film, lens ink and other materials, as well as the light transmittance test of opalescent translucent materials and frosted matte materials, such as zirconia, opalescent acrylic and so on. The light source of the instrument complies with the CIE photopic luminosity function and can pass the inspection of Chinese national metrological institute.

advantage video

Related knowledge of optical density: optical density, abbreviated as OD. It is defined as the logarithm of the ratio of incident light to transmitted light, or the logarithm of the light transmittance reciprocal. The calculation formula is OD = log10 (incident light / transmitted light) or OD = log10 (1 / light transmittance). Generally, when testing materials with very low light transmittance, it is difficult to compare the differences between the materials using the light transmittance value. The data will be more intuitive after converting into optical density values.


Parameter Value
Light transmittance measurement accuracy ±1% (0%-50%); ±2% (50%-100%)
Light transmittance resolution 0.0005% (0%-10%); 0.005% (10% -100%)
Optical density measurement range 0.000OD-6.000OD
Optical density measurement accuracy ±0.02 (0-2.00OD); ±2% (2.00-6.00OD)
Optical density resolution 0.001 OD (0.00-2.00OD); 0.01 OD (2.00-4.00OD); 0.1 OD (4.00-6.00OD)
Aperture 2mm
Light Source 380nm-760nm, conforming toCIE photopic luminosity function
Weight About 576g (without battery)
Power supply 4*AAA alkaline dry battery
Display 240*160 dot-matrixes LCD
Dimension 148mm×76mm×26mm (L*W*H)
product appearance
product appearance

LS117 Optical Density Meter Characteristics

1. The optical density meter has wide measuring range. The optical density value can be measured to OD 6. The transmittance resolution is up to 0.005%.

2. During the test, the interface displays both the transmittance value and the optical density value of the material.

functions of the instrument
functions of the instrument

3. The LS117 portable densitometer uses a diffuse transmission light path design, which has the same effect of the integrating sphere. There are relevant instructions in "GB / T 11500-2008 / ISO 5-2: 2001". The regulation has stated that “Use opale glass method instead of integrating sphere method as the basis of ISO standard diffuse transmission density”.

4.The light source complies with the CIE photopic luminosity function to ensure that it passes the testing of the Chinese Metrology Institute.

5. The optical density meter has two measurement methods which is more flexible to use.

two measurement methods
two measurement methods

(1) Fixed measurement: It is more suitable for testing regular or smaller objects.

(2) Hand-held measurement: take the probe down for testing, which is more suitable for irregular and large-volume materials.

6. Suitable for testing optical density of aluminized film, film, X-ray film, lens ink and other materials. The optical density meter is suitable for testing the light transmittance of opalescent translucent materials, matte materials.

optical density value
optical density value
light transmittance test
light transmittance test

Qualification and Standard

1. The LS117 Optical Density Meter conform to the following standard “JJF1225-2009 Calibration Specification for Transmittance Meter of Automobile”, “JJG920-2017 Diffuse Transmission Visual Densitometers”

2.  Calibration report

calibration certificate
calibration certificate

Operation Video

Packaging List

No. Description Quantity Unit
1 LS117 Optical Density Meter 1 pcs
2 AAA battery 4 pcs
3 User Manual 1 pcs
4 Certificate / warranty card 1 pcs
5 Aluminum box 1 pcs
6 Packing box dimension 34*25*14 cm(L*W*H) 1 pcs
package dimension
package dimension

After-Sales Service

  1. The meter has one-year warranty. If the instrument works abnormally, please send the whole instrument to our company for maintenance

  2. Provide users with spare parts and lifelong maintenance services

  3. Provide the users with the meter inspection service 

  4. Free technical support for long term

Manufacturer: Shenzhen Linshang Technology Co.,Ltd. Website:
Service hotline: 0755-86263411 Email:
For more information about the Light Transmittance Meter  selection, please click article below for details
Light Transmittance Meter Selection and FAQ


  1. 1. The difference between LS117 and LS116

    LS116 is suitable for measuring the light transmittance of transparent and regular materials. The diameter of the tested material must be greater than 10mm;

    LS117 is mainly suitable for measuring the light transmittance of opalescent, frosted fog, diffuse transmission materials and low-transmittance materials (at the same time it can measure the optical density value).The diameter of the measured material should be greater than 2mm.

  2. 2. What is the maximum sample thickness that LS117 light transmittance meter can measure?

    The LS117 light transmittance meter (optical density meter) use a point light source. Generally speaking, the smaller the tested material thickness, the more accurate the test result. It is not recommended to measure materials with a thickness that more than 2mm.

  3. 3. How to calibrate LS117 and how often does it need to be calibrated?

    The LS117 light transmittance meter (optical density meter) has a real-time dynamic self-calibration function and does not require other tools such as standard films to assist in calibration. Without placing any material under test, as long as the instrument passes self-calibration and displays 100%, the light transmittance test can be performed. The instrument accuracy is also guaranteed to meet the factory standards. 

Recommended products

● 1mm test aperture
● Test UV 365nm, IR 940nm, VL 380-760nm transmission
● Suitable for testing transparent and homogeneous materials, such as insulating glass, PMMA and PC material,etc.
● Three light sources share a test hole
● Light source: 380-760nm visible light, conforms to CIE photopic luminosity function
● High accuracy : better than ± 1% (colorless and homogeneous transparent materials)
● High or low transmittance materials is measurable (0.001% - 99.8%)