Measuring UV intensity
An ultravoilet light is divided into three bands i.e. UVA, UVB, UVC.
- UVA : It is a long wave UV transparent wavelength, 315 nm to 400 nm UV transparent. It causes skin tan, skin elasticity and collagen fibers.
- Uses: Curing Lamps in the Curing Industries.
- UVB : It is a medium wave UV with erythema effect, wavelength 280 nm to 320 nm. It promotes Vitamin D formation in body, but exposure for long time is not recommended.
- Uses : In Health care Physiotherapy Lamps
- UVC : It is a short wave with bacterial effect wavelength, 200 nm to 280 nm. It is very harmful, and its long term exposure causes skin Cancer.
- Uses: In Hospitals Germicidal Lamps
There are three fundamental parameters for UV measurement. These are wavelength, energy density and irradiance.
- Wavelength: To measure the wavelength we require a Spectroradiometer (they can measure individual peaks) or Spectrometer.
- Irradiance: Intensity is the output energy of UV source. The amount of UV falling on a surface is called irradiance. A cm2 is the area which is used to track the UV from all angles and is determined by direct measurements. It is measured in Watt/cm2 or mW/cm2 .
- UV Energy Density:It is exposure of UV light with time factor. That is 1 watt for 1 sec equal 1 joule. It is measured in Joules/cm2 or mJ/cm2 .
Now it is very important to understand your UV measuring instrument. It will help you and the customers to better understand the readings.
What factors cause
- Potential confusion
- Measurement Errors
Some factors which influence Irradiance Measurements are:
- Cosine error
UVB or UVA light sources irradiation intensity can be detected by the UV lamp intensity meter. Multi-probe UV measurement device that can be equipped with probes: No matter you want to test the UVA,UVB or UVC band. You can select a suitable probe.
ITC India is offering the following services for Calibration
- Calibration of UV intensity Meter
- Calibration of UV sensor
- Validation of UV chamber
- Calibration of UV bulbs