LS120 UV Energy Meter

For high pressure mercury lamp and halogen lamps
Spectral response range: 315nm-400nm, λp = 365nm
Record UV intensity, energy, temperature, test duration together
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LS120 UV energy meter can not only measure energy, power, temperature and measuring time at the same time but also display the energy and power curves, export data and print test report. It has created many firsts in the UV energy meter industry:

  • The first UV energy meter that can display the temperature curve

  • The first UV energy meter can measure real-time temperature and power

  • The first UV energy meter with a built-in timer that accurately records the curing time

  • The first UV energy meter that can print a test report via a USB connection to a computer

If you want to know how this UV puck test high pressure mercury lamp, you can watch the video below:



LS120 UV energy meter is widely used in UV exposure, UV adhesive curing, UV ink curing, UV digital printing, optical communication, UV 3D printing and other fields. It is suitable for energy measurement of high pressure mercury lamps, halogen lamps, gallium lamps, iron lamps, xenon lamps and other light sources.

UV printing

UV printing

UV curing

UV curing

UV 3D printing

UV 3D printing

UV exposure

UV exposure


Parameter LS120 UV Energy Meter
Application Light intensity, energy and temperaturemeasurement of high pressure mercury lamp
Spectral range 315nm - 400nm, λp = 365nm
Power measuring range 0 - 2000 mW/cm²
Power resolution 0.1 mW/cm²
Energy measuring range 0 - 999999mJ/cm²
Measuring accuracy(H is the standard value) H<5mW/cm²: ±0.5mW/cm²
H>=5mW/cm²: ±10%H, ±5% (typical)
Temperature measuring range -55°C - +125°C
Sampling speed 2048 times/second
Power 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 Dot matrix LCD
Test Hole Diameter Φ10mm
Dimension Diameter 120mm * thickness 13mm
Weight 327g


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

Powerful PC software

The LS120 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

High-accuracy and fast-response temperature detector, truly dynamic measurement of the actual temperature in the curing machine

High temperature resistant

Built-in heat shield, high temperature resistant design. The UV energy meter can run in the environment of 100 degrees Celsius for a long time. For details on the high-temperature resistance experiments of the Linshang UV energy meter, you can click the article below to check: Use Time of Linshang UV Energy Meter at Different High Temperature

More detail information

±10% high accuracy makes powerful meter

Accurately record the curing time

2048 times/sec high-speed data acquisition

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

Qualifications and Standards

LS120 UV energy meter conforms to the following standard:

JJG 879-2015 Verification Regulation of Ultraviolet Radiometers

Operation and Software

Operation video

Software operation


No. Description Quantity Unit
1 LS120 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 Certificate/Warranty card 1 pcs
8 Plastic box dimension 25*21*7cm (L*W*H) 1 pcs
9 Calibration Report 1 pcs
LS120 UV integrator package
LS120 UV integrator 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 LS120 and LS130 UV energy meters

    Both LS120 and LS130 are UV energy meters used to detect 365nm high pressure mercury lamps. They can measure the power value (irradiation intensity) of the UV lamp, the energy value and display the power curve; in addition, LS120 can also measure the temperature in the curing machine, and display temperature curve, but LS130 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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