1. What is the difference between 940nm and 1400nm instruments?

The two bands of 940nm and 1400nm are relatively representative bands. Most of the absorption films (heat-absorbing films) have better infrared blocking effect at 940nm, while the magnetron sputtering reflection film has better blocking effect at 1400nm such as metal film and ceramic nano film. Please choose the right instrument for your own film category.

2. What is the difference between a metal film and an endothermic film?

The metal film is produced by a magnetron sputtering process. A large amount of metal elements are added and the has a good reflection ability to the infrared film. It is insulated by the principle of reflecting infrared rays. The absorption film is added with an infrared absorber during production and the infrared is absorbed by the film. It is insulated by the absorption principle and secondary heat radiation will be generated after the heat absorption is saturated.

3. Can 940nm instrument measure metal film? Can the 1400nm instrument measure endothermic films? When the same film is tested by both 940nm and 1400nm, what is the difference in infrared rejection rate?

Each film tested by both 940nm and 1400nm instruments will have infrared blocking rate data. Due to different production processes, the thermal insulation data of some films at 940nm will be larger than the thermal insulation data of 1400nm. Some films will have larger thermal insulation data at 1400nm. E.g: Vickers V70 has an official infrared rejection rate of 98%. The measurement data tested by 1400nm instrument is about 98%, while the measurement data tested by 940nm instrument is only about 88%. The 3M Jingrui 70 has an official infrared rejection rate of 98%. The measurement data tested by 940nm instrument is about 99%, while the measurement data tested by 1400nm instrument is only about 87%. There are too many types of films and the data differences between 940nm and 1400nm are also very different. Some films may not differ much and some films differ by 30-40%, so we can\'t tell you the exact value.

4. Why are 1400nm instruments so much more expensive than 940nm instruments?

It\'s all about the cost of raw materials. The cost of a 1400nm light source and receiver is much higher.

5. Can the window film transmission meter measure the insulation rate?

Our instrument measures the infrared rejection rate. The higher the infrared rejection rate, the higher the thermal insulation rate. Because visible light also has a small amount of heat, in the strict sense, the heat insulation rate needs to integrate visible light, infrared and ultraviolet heat insulation data. Ultraviolet heat is very small and visible light is beneficial. Therefore, infrared is the main source of heat, so the infrared rejection rate is basically equivalent to the thermal insulation rate.

6. What is the difference between LS300 and LS301?

The LS300 measures the real-time temperature (degrees Celsius) and the temperature difference. The LS301 has an additional function to measure the infrared rejection rate of 940nm than the LS300. At the same time, the LS301 also measures the real-time temperature value.

7. What is the difference between the new and old LS101?

The parameters of the new and old models are basically the same, both of which can measure three parameters of heat insulation, UV rejection and light transmission. The old model can only be used when plugged in. It is a digital tube display. The new model is an LCD display. It uses 4 AA batteries and has a USB interface on the instrument. It can be directly powered by a power bank or 5V charging head. The light source of the old LS101 is a point light source, which is only suitable for films and thin glass; the new LS101 uses a parallel light path design and thick glass can also be tested.

Window Film Transmission Meter Selection and FAQ

From:Linshang Time:2019/11/28 14:02:00 Browse:1430

I. Linshang Window Film Transmission Meter Selection Table and Price List

1. Portable Three-band Window Film Transmission Meter

Model	Appearance	Features
LS160		Same point: 1. Pocket type, smallest size, one-hand grip 2. 0.8mm slot, can only measure film 3. Size: 93mm * 25mm * 52mm 4. 365nm UV rejection rate, 530nm transmittance Difference: 1. LS160 measures 940nm infrared rejection rate 2. LS160A measures 1400nm infrared rejection rate 3. LS160 recommends measuring endothermic film
LS160A
LS162		Same point: 1. 8mm slot, can measure film, stick-film glass, automobile side shield 2. Size: 120mm * 25mm * 75mm 3. 365nm UV rejection rate, full wavelength transmittance Difference: 1. LS162 measures 940nm infrared rejection rate 2. LS162A measures 1400nm infrared rejection rate 3. LS162 recommends measuring endothermic film (glass) 4. LS162A is recommended to measure metal film (glass)
LS162A
LS163		Same point: 1. 6mm slot, can measure film, stick-film glass, automobile side windshield 2. Size: 146mm * 73mm * 24mm 3. 365nm UV rejection rate, full wavelength transmittance 4．Rotatable interface, three display modes are available Difference: 1. LS163 measures 940nm infrared rejection rate 2. LS163A measures 1400nm infrared rejection rate 3. LS163 recommends measuring endothermic film (glass) 4. LS163A is recommended to measure metal film (glass)
LS163A

2. Desktop and split window film meter

Model	Appearance	Features
LS101		1.20mm slot, for testing films, automobile side glass, etc. 2.Light source: 365nm, 380-760nm, 940nm 3.Two AA batteries and 5V power supply 4.Comes with backlight and bracket for convenient reading
LS182		1. 47mm slot, for testing films, glass 2. Size: 216mm * 134mm * 29mm 3. 365nm UV rejection rate, 380nm-760nm light transmittance 4. Can switch 940nm, 1400nm, full-band infrared rejection rate and SHGC
LS110A		Same point: 1. Split-type design, can measure car front shield, curtain wall glass 2. Size: 130mm * 70mm * 84mm 3. 365nm UV rejection rate, 380nm-760nm light transmittance 4. Rechargeable lithium battery Difference: 1. LS110A measures 940nm infrared rejection rate 2. LS110H measures 1400nm infrared rejection rate 3. LS110A recommends measuring endothermic film (glass) 4. LS110H is recommended to measure metal film (glass)
LS110H

3. Demonstration Window Film Transmission Meter

Model	Appearance	Features
LS300		1. Demonstration and comparison of glass insulation performance 2.Real-time temperature and temperature difference
LS301		1. Demonstration and comparison of glass insulation performance 2. Real-time temperature and infrared rejection rate
LS122		1.Test ultraviolet radiation intensity 2.IR rejection rate of the tested material 3.Spectral response curve: 1000-1700nm
LS123		1.Test ultraviolet radiation intensity 2.UV rejection rate of the tested material 3.Spectral response curve: 260-400nm
FS2150		1.Heat insulation performance demonstration 2.UV blocking performance demonstration 3.Infrared reflection performance 4.150W infrared light
FS3150		1.Heat insulation performance demonstration 2.UV blocking performance demonstration 3.Infrared reflection performance 4.150W infrared light 5. Adjustable infrared light intensity

II. Product Details of Linshang Window Film Transmission Meter

1. Pocket Window Film Transmission Meter

● Notch width 0.8mm, point light source design, only test film
● Ultra-small size design
● Ultraviolet light: 365nm, visible light: 530nm
● Infrared: 940nm (LS160); 1400nm (LS160A)

Model: LS160/LS160A

2. Portable Window Film Transmission Meter

● 8mm wide slot, point light source design
● Suitable for testing films, laminated glass and automobile side glass
● Ultraviolet light: 365nm, visible light: 380-760nm (in line with CIE photopic luminosity function)
● Infrared: 940nm (LS162); 1400nm (LS162A)

Model: LS162/LS162A

3. Window Tint Meter

● 6mm wide slot, parallel light path design, display interface can be rotated in 360 °
● Suitable for testing films, laminated glass and automobile side glass
● Visible light transmittance / full transmittance / transmittance + rejection rate, three display modes can be switched
● Ultraviolet light: 365nm, visible light: 380-760nm (in line with CIE photopic luminosity function)
● Infrared: 940nm (LS163); 1400nm (LS163A)

Model: LS163/LS163A

4. Classic Three-Band Window Tint Meter （2nd)

● 20mm wide slot, parallel light path design
● Suitable for testing films, laminated glass and automobile side glass
● Adopt large-screen LCD, support 4 AA batteries and 5V power supply
● Ultraviolet: 365nm, visible light: 380-760nm (in line with CIE photopic luminosity function), infrared: 940nm

Model: LS101

6. Split Window Film Transmission Meter

● Adopt wireless split type and parallel light path design
● Suitable for measuring all kinds of installed glass, such as automobile front shield, curtain wall glass, etc.
● Built-in rechargeable lithium battery and magnet for easy going out testing
● Ultraviolet light: 365nm, visible light: 550nm
● Infrared: 940nm (LS110A); 1400nm (LS110H)

Model: LS110A/LS110H

6. LS182 Versatile Six-band Window Film Transmission Meter

● Notch width 47mm, parallel light path design, large LCD display
● It is suitable for testing the heat insulation, UV rejection and light transmission performance of various films and glass in the store.
● Ultraviolet light: 365nm, visible light: 550nm
● Infrared: 940nm, 1400nm and full band can be switched
● Test SHGC solar total transmittance (solar heat gain coefficient)

Model: LS182

8. Solar Film Temperature Meter

● The instrument can compare the thermal insulation performance of two glasses by the temperature difference.
● Using 150W genuine Philips infrared light source and imported temperature probe
● LS300 can display the real-time temperature in the space below the instrument and the temperature difference.
● LS301 can display real-time temperature in the space below the instrument and infrared rejection rate of glass

Model: LS300/LS301

9. Infrared and UV Power Meter

● LS122 spectral response range: 1000-1700nm
● LS123 spectral response range: 260-400nm
● LS122 is used to test the real-time infrared radiation intensity and infrared rejction rate of materials
● LS123 is used to test the real-time infrared radiation intensity and UV rejection rate of materials

Model: LS122/LS123

11. Glass and Film Sales Kits

● Used to demonstrate the transmission performance and the infrared rays reflection performance of glass
● Suitable for demonstration of insulation glass with better reflective insulation performance
● Note: Only test the intensity of infrared radiation reflected by the heat-insulating material, not the reflectance of the material

Model: FS2150

III. FAQ about Linshang Window Film Transmission Meter

1. What is the difference between 940nm and 1400nm instruments?

The two bands of 940nm and 1400nm are relatively representative bands. Most of the absorption films (heat-absorbing films) have better infrared blocking effect at 940nm, while the magnetron sputtering reflection film has better blocking effect at 1400nm such as metal film and ceramic nano film. Please choose the right instrument for your own film category.
2. What is the difference between a metal film and an endothermic film?

The metal film is produced by a magnetron sputtering process. A large amount of metal elements are added and the has a good reflection ability to the infrared film. It is insulated by the principle of reflecting infrared rays.

The absorption film is added with an infrared absorber during production and the infrared is absorbed by the film. It is insulated by the absorption principle and secondary heat radiation will be generated after the heat absorption is saturated.
3. Can 940nm instrument measure metal film? Can the 1400nm instrument measure endothermic films? When the same film is tested by both 940nm and 1400nm, what is the difference in infrared rejection rate?

Each film tested by both 940nm and 1400nm instruments will have infrared blocking rate data. Due to different production processes, the thermal insulation data of some films at 940nm will be larger than the thermal insulation data of 1400nm. Some films will have larger thermal insulation data at 1400nm.

E.g: Vickers V70 has an official infrared rejection rate of 98%. The measurement data tested by 1400nm instrument is about 98%, while the measurement data tested by 940nm instrument is only about 88%.

The 3M Jingrui 70 has an official infrared rejection rate of 98%. The measurement data tested by 940nm instrument is about 99%, while the measurement data tested by 1400nm instrument is only about 87%.

There are too many types of films and the data differences between 940nm and 1400nm are also very different. Some films may not differ much and some films differ by 30-40%, so we can't tell you the exact value.
4. Why are 1400nm instruments so much more expensive than 940nm instruments?

It's all about the cost of raw materials. The cost of a 1400nm light source and receiver is much higher.
5. Can the window film transmission meter measure the insulation rate?

Our instrument measures the infrared rejection rate. The higher the infrared rejection rate, the higher the thermal insulation rate. Because visible light also has a small amount of heat, in the strict sense, the heat insulation rate needs to integrate visible light, infrared and ultraviolet heat insulation data. Ultraviolet heat is very small and visible light is beneficial. Therefore, infrared is the main source of heat, so the infrared rejection rate is basically equivalent to the thermal insulation rate.
6. What is the difference between LS300 and LS301?

The LS300 measures the real-time temperature (degrees Celsius) and the temperature difference. The LS301 has an additional function to measure the infrared rejection rate of 940nm than the LS300. At the same time, the LS301 also measures the real-time temperature value.
7. What is the difference between the new and old LS101?

The parameters of the new and old models are basically the same, both of which can measure three parameters of heat insulation, UV rejection and light transmission.

The old model can only be used when plugged in. It is a digital tube display. The new model is an LCD display. It uses 4 AA batteries and has a USB interface on the instrument. It can be directly powered by a power bank or 5V charging head.

The light source of the old LS101 is a point light source, which is only suitable for films and thin glass; the new LS101 uses a parallel light path design and thick glass can also be tested.

Tags: Solar film transmission meter