Linshang LS137 UV Energy Meter for UV Adhesive Curing and Bonding Malaysia

Linshang LS137 UV Energy Meter for UV Adhesive Curing and Bonding Malaysia

UV-curable adhesives are widely used in electronics, optical components, medical-device manufacturing, glass bonding and precision industrial assembly.

One major advantage of UV adhesive is fast curing. However, a fast process also means that UV exposure must be controlled properly.

If the adhesive receives insufficient UV energy, the bond may appear cured on the outside while failing to achieve the expected performance.

The Linshang LS137 UV Energy Meter is designed for UV LED light sources and provides measurement of UV energy, UV irradiance and temperature, making it useful for monitoring UV LED adhesive-curing processes.

Why UV Energy Matters in Adhesive Curing

UV-curable adhesives depend on ultraviolet radiation to initiate the curing reaction.

Successful curing can depend on several variables:

UV wavelength

UV irradiance

Accumulated UV energy

Exposure duration

Distance from the UV source

Adhesive thickness

Adhesive formulation

Substrate material

UV transmission through the substrate

Process temperature

Changing one of these variables may affect the final bond.

For this reason, simply specifying that the lamp should be switched on for a certain number of seconds may not provide complete process information.

Common Problems with UV Adhesive Curing

Insufficient or inconsistent UV curing can potentially contribute to:

Weak bonding

Adhesive remaining tacky

Incomplete curing

Poor edge curing

Variable bond strength

Components separating after assembly

Longer-than-expected curing time

Inconsistent production results

Increased rejection rates

When these problems appear, manufacturers often investigate the adhesive first.

But the UV curing conditions should also be verified.

What Does the Linshang LS137 Measure?

The Linshang LS137 can measure important UV LED curing parameters including:

UV Energy

UV Irradiance

Peak UV Irradiance

Measurement Duration

Temperature

Maximum Temperature

This allows engineers to evaluate both the strength of the UV radiation and the accumulated exposure during the curing cycle.

Designed for UV LED Sources

The LS137 has a spectral response range of approximately:

340–420 nm

It is calibrated using a:

395 nm UV LED source

This makes the LS137 particularly relevant to modern industrial UV LED curing systems.

Common UV LED wavelengths used in industrial applications can include:

365 nm

385 nm

395 nm

405 nm

The actual UV wavelength should always be confirmed before selecting a measurement instrument.

UV Intensity vs UV Energy in Bonding

For UV adhesive curing, it is important to understand the difference between intensity and energy.

UV Intensity

UV intensity indicates the strength of UV radiation reaching the detector at a particular moment.

UV Energy

UV energy represents the accumulated UV exposure over the measurement period.

Both parameters can affect the curing process.

For example, two production stations may have similar peak UV intensity but different exposure times.

The station with the shorter exposure may deliver less total UV energy.

This can potentially result in different curing performance.

Example: Electronics Assembly

Consider an electronics manufacturer using UV adhesive to secure small components.

The production process has been qualified using a 395 nm UV LED curing system.

During normal production, the company records acceptable UV exposure using the LS137.

Several months later, QA begins reporting inconsistent bonding.

The production team can compare current LS137 readings against the original baseline.

If UV intensity or accumulated energy has decreased, possible causes may include:

UV LED degradation

Dirty optical surfaces

Incorrect curing distance

Cooling problems

Power-supply issues

Changed exposure time

This gives technicians a logical starting point.

Example: Glass Bonding

UV adhesive is also commonly used where UV radiation passes through a transparent material before reaching the adhesive.

In this situation, curing performance can be influenced by:

Glass thickness

Optical transmission

Surface coating

Distance

UV wavelength

Adhesive layer thickness

Therefore, knowing the UV output from the curing source can provide useful process-control information.

For demanding applications, engineers should evaluate UV conditions at a measurement position that represents the actual process as closely as possible.

Distance from the UV LED Source

UV intensity reaching the product can change when the distance between the UV LED source and the bonding area changes.

This may happen because of:

Different component heights

Fixture changes

Machine adjustment

Maintenance

Different product models

If one product is positioned closer to the UV source than another, the curing conditions may not be identical.

Measurement can help engineers evaluate these differences.

Exposure Time Is Critical

In manual curing applications, an operator may hold the UV LED source over the adhesive for a specified period.

For example:

5 seconds

But exposure time alone does not guarantee identical UV energy.

If the UV source output changes, the same five-second exposure may deliver a different dose.

A more controlled process considers both:

UV output + exposure time

rather than time alone.

High-Intensity UV LED Applications

Modern industrial UV LED curing equipment can generate high irradiance.

The LS137 supports UV irradiance measurement up to:

40,000 mW/cm²

This makes it suitable for measuring high-intensity UV LED curing sources within its specified operating conditions.

Establish a Known-Good Bonding Baseline

One of the most useful ways to apply a UV energy meter is to establish a baseline during successful production.

When bond quality meets requirements, record:

UV wavelength

Peak UV irradiance

Accumulated UV energy

Exposure duration

Maximum temperature

UV power setting

Curing distance

Adhesive type

Adhesive thickness

Substrate

Production result

These values provide a reference for future troubleshooting.

Don't Wait Until Bonds Start Failing

UV measurement can be incorporated into preventive process checks.

Depending on the application, measurements can be performed:

At machine setup

At the start of production

Periodically during production

After UV LED maintenance

After replacing a UV module

After changing fixtures

After changing curing distance

When changing production speed

When bonding quality changes

The appropriate frequency depends on the production process and quality requirements.

Comparing Multiple UV Curing Stations

A factory may operate several UV curing stations that appear identical.

For example:

Station A: 80% power

Station B: 80% power

Station C: 80% power

This does not necessarily prove that all three stations are delivering identical UV exposure.

Actual output may vary because of:

LED condition

Operating hours

Cooling

Optical cleanliness

Distance

Equipment tolerances

Measurement provides a better basis for comparison.

Using LS137 for Process Qualification

When introducing a new UV adhesive process, manufacturers can test different curing parameters.

For example:

Test 1: Lower UV energy

Test 2: Medium UV energy

Test 3: Higher UV energy

The resulting bond quality can then be evaluated.

Once acceptable parameters are identified, the corresponding UV measurements can become part of the production reference.

This is much more useful than relying only on a machine power percentage.

Troubleshooting UV Adhesive Failure

A practical troubleshooting sequence is:

1. Identify the bonding defect

Determine whether the problem involves incomplete cure, weak adhesion or inconsistent bonding.

2. Check production parameters

Confirm exposure time, UV power, distance and fixture position.

3. Measure UV output

Record UV intensity and accumulated energy.

4. Compare with baseline

Check whether UV conditions have changed.

5. Investigate other variables

If UV readings remain normal, examine the adhesive, substrate, dispensing process and component preparation.

This reduces unnecessary trial-and-error adjustments.

LS137 or LS136?

The correct Linshang UV energy meter depends on the light source.

For a modern UV LED curing system, consider:

Linshang LS137

For a traditional high-pressure mercury UV curing lamp, consider:

Linshang LS136

Always identify the UV source before purchasing the meter.

Who Can Use the Linshang LS137?

Potential users include:

Electronics manufacturers

Optical manufacturers

Precision assembly companies

UV adhesive users

Printing companies

Coating manufacturers

QA/QC departments

Production engineers

Maintenance technicians

UV equipment suppliers

The LS137 is particularly useful where consistent UV LED exposure is an important part of production quality.

Looking for a UV Energy Meter for Adhesive Curing in Malaysia?

MTM Precision supplies industrial testing and measurement instruments for Malaysian manufacturing, engineering, maintenance and quality-control applications.

If you are using UV adhesive and need to select an appropriate UV energy meter, provide us with:

UV wavelength

UV source type

UV curing equipment model

Adhesive application

Expected UV intensity

Exposure method

We can assist you in determining whether the Linshang LS137 UV Energy Meter is suitable for your application.

Contact MTM Precision

MTM Precision Sdn. Bhd.

Showroom & Service Centre

No. 29-1 & 29-2, Jalan Bandar 18,