LS128 UV Energy Meter

Special for UV LED (365, 385, 395, 405nm, etc.)
UV intensity measuring range of 40000 mW/cm²
Record UV intensity, energy, temperature and curing time together
Provide PC software

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LS128 is a professional UV energy meter for testing UV LED light sources and has various excellent achievements:

  1. The first UV energy meter for UV LED light source testing.

  2. The first wide-range UV energy meter with a range of 40W/cm².

  3. The first UV energy meter for a wide spectrum (340nm-420nm).

  4. The first UV energy meter that measures temperature and power at the same time and can display process curves.

Its spectral response range is 340nm-420nm and it can test various wavelengths of 365nm, 375nm, 385nm, 395nm, 405nm and other UV LED light source.


Parameter LS128 UV Energy Meter
Application Light intensity, energy and temperature measurement of UV LED light sources
Spectral range 340nm - 420nm, calibrated at 395nm UV LED light sources
Irradiance measuring range 0 - 40000 mW/cm²
Irradiance resolution 1 mW/cm²
Energy measuring range 0 - 999999 mJ/cm²
Energy Measuring accuracy
(H is the standard value)
H>=5mW/cm²:±10%H, ±5% (typical)
Temperature measuring range -55°C -125°C
Sampling speed 2048 times/second
Irradiance data storage interval 32 times/second
Temperature data storage interval 2 times/second
Recording period 32 min
Power supply 2 AAA alkaline dry batteries
Display 240*160 Dot matrix LCD
Test Hole Diameter Φ10mm
Dimension Diameter 120mm * Thickness 13mm
Weight 327g
LS128 UV energy meter
LS128 UV energy meter


Two measurement modes available

There are two measurement modes. One is Manual mode which needs to start up or end of measurement manually. Another is automatic modes that can automatic switch-on or end of measurement when the energy intensity emitted by the light source is above or below the trigger threshold that can be set

Four interfaces help you record the data of UV light source

There are four interfaces to help you know better about UV light source you tested: In maximum values interface, you can acquire cumulative energy value, maxiumum power value and maximum temperature value. Measurement time can be recorded in RT interface. In temperature and power curve interface, you can know the temperature change and energy intensity variation of the light source. Four interfaces can be switched freely

Wide spectral response range

With wide spectral response range, the UV power puck can test UV LED light source with any peak in the range of 340nm-420nm

Powerful PC software

The LS128 UV Energy Meter can be connected to PC software, which allows you to generate reports and print out test results, as well as to export test data

Temperature measurement possible

The high-precision and fast-response temperature detector is used to measure the actual temperature in the curing machine

High temperature resistant

High temperature resistant design with built-in heat insulation sheet, it can run in the environment of 100 degrees Celsius for a long time. Click for more: Use Time of Linshang UV Energy Meter at Different High Temperature

More detail information

High-speed data acquisition of 2048 times/sec, more accurate measurement

Built-in timer can accurately record the UV curing time

The stored data will not lost when the power is turned off

Qualifications and Standards

LS128 UV energy meter patent certificate
LS128 UV energy meter patent certificate


UV Energy Meter operation

UV Energy Meter software operation

How to calibrate the UV curing process


No Description Quantity Unit
1 LS128 UV Energy Meter 1 pcs
2 USB cable 1 pcs
3 AAA battery 2 pcs
4 Antistatic gloves 1 pcs
5 Cross head screw-driver 1 pcs
6 User manual 1 pcs
7 Calibration Report 1 pcs
8 Certificate/Warranty card 1 pcs
9 Plastic box dimension 25*21*7cm (L*W*H) 1 pcs
LS128 UV energy meter package
LS128 UV energy meter package


  1. 1. The difference between LS120 and LS128 UV energy meters

    LS120 UV energy meter is mainly used to detect 365nm UV high pressure mercury lamp, while LS128 UV energy meter is mainly used to detect 365nm, 385nm, 395nm and 405nm UV LED light sources.

  2. 2. The difference between LS128 and LS131 UV energy meters

    Both LS128 and LS131 are UV energy meters used to detect 365nm, 385nm, 395nm and 405nm UV LED light sources. They can measure the power value (irradiation intensity) of the UV lamp, the energy value and display the power curve; in addition, LS128 can also measure the temperature in the curing machine, and display temperature curve, but LS131 does not have this function.

  3. 3. Whether a traceable calibration certificate is included?

    LS120 and LS130 are professional UV energy meters used to detect 365nm high-pressure mercury lamps, which can be ensured to pass the inspection of the Metrology Institute and obtain a calibration certificate (approved by CNAS and ilac-MRA). The cost of the calibration certificate is about US$200 ; LS128 and LS131 are UV energy meters that are professionally used to detect UV LED light sources. There is no unified inspection standard for LED light sources, each light source and UV energy meter manufacturer has their own calibration standards. We can provide the factory calibration reports for these two UV LED energy meters, but no calibration certificates can be provided.

    LS130 and LS131 have certified to CE.

  4. 4. How to calibrate UV energy meter, how often do I need to calibrate and how much does it cost?

    To calibrate the UV energy meter, please send the instrument back to the manufacturer. Generally, it is recommended to calibrate it once a year. If the storage environment is good and the frequency of use is not high, the calibration period can also be extended according to user needs. The first calibration is free, and the cost of each subsequent calibration is US $32.



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