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UV curing meters

Radiometers and spectroradiometers for UV curing intensity and dose measurements.

A critical quality feature of UV curing processes is the control of the UV dose within the wavelength range required of the particular photoinitiators ..........

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A critical quality feature of UV curing processes is the control of the UV dose within the wavelength range required of the particular photoinitiators used. Dose is measured in J/cm² and is the product of UV intensity and time of exposure (W/cm² x seconds). UV intensity, also referred to as irradiance, is measured by UV radiometers in W/cm². Therefore, suitable UV radiometers permit the correct setting of irradiance levels and irradiation times as well as enabling periodic adjustments to compensate for the aging effects of the UV lamps and UV LEDs.

 

UV radiometers suitable for UV curing must meet important requirements:

* Flat design for measurements near the reference plane

* Sufficient measuring range for the very high irradiance in the UV curing processes

* UV radiation resistance for long-term stability

* Temperature resistance during the measurement

* Safe handling to protect the user from hazardous UV radiation

* Traceable calibrations

 

UV radiometers are available in two different technologies:

* Broadband UV radiometers are most suited for consistency measurements of the UV irradiance within a defined spectral range. They are inexpensive and very easy to use.

* UV spectroradiometers are used when different UV lamps or photoinitiators are in use. They are ideal for process development and manufacturing preparation.



UV radiometers for measuring the irradiance (mW / cm²) and dose (J / cm²) of mercury vapor lamps and UV LEDs.

UV & Blue Light Curing radiometers
Model Image Spectral function Wavelength range / nm Entrance optic Typ. Range Minimum SNR=50 100ms integration Typ. Range Maximum Remark

X1-1-RCH-116-4

Lichtmesstechnik X1 LED λ's: 365, 375, 385, 395, 405 & 430 nm 350 - 450 Diffuser 9 mm Ø 1 mW/cm² 40 W/cm² UV radiometer for routine measurements of high power UV LEDs. Multiple calibrations at LED wavelengths. Rigid light guide provides 25cm sensor to handle distance for operator safety.

X1-1-RCH-108

Lichtmesstechnik X1 Narrowband UV-A 365 nm peak Diffuser 9 mm Ø 0.02 mW/cm² 40 W/cm² UV radiometer for routine measurements of UV-A narrow band (365nm) high power UV lamps. Rigid light guide provides 25cm sensor to handle distance for operator safety.

RCH-xxx Series

RCH1 RCH0 UV-A, UV-B and Blue light 250 - 485 Diffuser 9 mm Ø < 1 mW/cm² 40 W/cm² Range of UV curing irradiance detectors for use with all common types of discharge lamps and UV LEDs covering UV-A, blue light and UV-B spectral ranges. E.g. for use with X1-1 handheld meter.

Spectroradiometers for UV curing applications
Model Image Entrance Optic Wavelength range /nm Optical Bandwidth Spectral responsivity min. Spectral Responsivity Max. Remark
BTS256-UV-1 BTS256 UV Series s2 Diffuser 9 mm Ø on 25cm rigid guide 225 - 525 2.8 nm 0.01 W/ (m2 nm) 1000 W/ (m2 nm) Ultra-thin sensor (8mm) with 25cm rigid guide connection to spectroradiometer. Typical measurement times: 360 nm LED with 50 mW/cm² - 100 ms 460 nm LED with 50 mW/cm² - 45 ms
BTS256-UV-2 BTS256 UV Series s2 Integrated Diffuser 10 mm Ø 200 - 525 2.8 nm 0.01 W / (m2 nm) > 1000 W / (m2 nm) Integrated sensor permits use on conveyor systems. 12mm device thickness. Typical measurement times: 360 nm LED with 50 mW/cm² - 65 ms 460 nm LED with 50 mW/cm² - 35 ms