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UV A and UV B Sensitive Dosimeter Badge
Plaque dosimètre sensible aux UV A et UV B allows for iterative data collection and hypothesis testing regarding the efficacy of sunscreens and UV-blocking textiles.
Se colore en rose instantanément au soleil. Enables field-based data acquisition in high-exposure environments, reinforcing practical observation and evidentiary analysis skills.
₹1,230.00
Quick Answer: The UV A and UV B Sensitive Dosimeter Badge is a UV dosimeter badge that changes colour when exposed to ultraviolet A and B radiation, giving a visual indication of UV exposure. It is used in science and health lessons to investigate sunlight, shade, sunscreen and the link between UV and skin damage.
Making Invisible Radiation Visible
Ultraviolet radiation is invisible, so a badge that changes colour under UV turns it into something students can observe and compare. The listing names the badge as sensitive to UV-A and UV-B, the two bands of solar ultraviolet that reach the ground. UV-A has the longer wavelengths, about 315 to 400 nm, penetrates deeper into the skin and contributes to skin ageing; UV-B, about 280 to 315 nm, is the main cause of sunburn. Shorter-wavelength UV-C is absorbed high in the atmosphere and does not reach the surface.
UV-sensitive badges and cards usually rely on a photochromic or UV-reactive coating that darkens or changes colour as UV strikes it. Some types return to their original colour out of the sun and can be reused, while others change permanently to record a total dose. The listing does not say which type this badge is, how quickly it responds, its size or whether a comparison scale is printed on it, and its product image is not currently available, so confirm these at enquiry. Either way it is an indicator for teaching, not a calibrated measuring instrument.
Simple investigations work well with a set of badges: compare readings in sun and shade, at different times of day or on cloudy and clear days; cover part of a badge with a clear plastic film smeared with sunscreens of different protection factors; or place badges behind window glass, sunglasses and fabric to see what blocks UV. Linking the results to the Skin Cancer Model makes the health message concrete.
Investigations and Lessons
- Comparing UV exposure in sun and shade and at different times of day
- Testing how well sunscreens, fabrics, sunglasses and glass block UV
- Health lessons on sunburn, skin ageing and skin cancer prevention
- Physics lessons on the electromagnetic spectrum and the ozone layer
Specifications
| Item | Badge that changes colour on exposure to ultraviolet radiation |
| Sensitivity named in the title | UV-A and UV-B |
| Use | Qualitative indication of UV exposure for teaching |
| Topics | Solar radiation, sun protection, sunscreen testing |
| Response type (reversible or cumulative), size and scale | Confirm at enquiry |
Care & Handling
- Keep the UV dosimeter badges in an opaque envelope or box until use, so they are not exposed before an experiment starts.
- Handle badges by their edges and keep sunscreen off the sensitive surface itself; apply it to a clear film laid over the badge instead.
- Never look directly at the sun while taking readings, and record colours promptly, as some UV-sensitive materials begin to fade back once out of sunlight.
Why Choose LabEquip
Science teachers and school health educators buy UV-sensitive badges in class sets so every group can run its own sun-safety investigation. LabEquip lists them with its biology lab products; to confirm the response type and quantities, use the contact page.
Frequently Asked Questions
What is the difference between UV-A and UV-B?
UV-A has longer wavelengths, penetrates deeper into the skin and contributes to skin ageing and some skin cancers. UV-B has shorter wavelengths, carries more energy and is the main cause of sunburn. Both reach the ground in sunlight.
Why does UV-C not need to be detected?
Almost all UV-C from the sun is absorbed by oxygen and ozone high in the atmosphere, so it does not reach the ground. It matters mainly near artificial sources such as germicidal lamps.
Does the badge measure the UV Index?
No. A colour-change badge gives a visual, qualitative indication of UV exposure for teaching. The UV Index is calculated from measurements made with calibrated instruments and is published in weather forecasts.
How can the badge be used to test sunscreen?
Lay a clear plastic film over part of the badge and spread a thin layer of sunscreen on the film. After exposure to sunlight, compare the colour under the sunscreen with the uncovered part.
Can UV reach us on cloudy days or through windows?
Yes. Much UV passes through light cloud, and ordinary window glass blocks most UV-B but lets through a good deal of UV-A. Badges placed in these conditions let students test this for themselves.
Why does UV exposure matter for health?
UV damages the DNA in skin cells, causing sunburn in the short term and raising the risk of skin cancer and premature skin ageing over the years. It can also harm the eyes, which is why sunglasses and shade matter.
Last Updated: September 2026
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