Erythema Test Units

Measuring the sensitivity of patients' skin to ultraviolet (UV) radiation before they embark on a course of UV treatment for their skin disease can make the treatment more effective. This measurement, or PHOTOTEST, involves measuring small areas of skin to increasing doses of UV radiation and noting the smallest dose (called the minimal erythema dose or MED) that results in a slight redness of the test site 24 hours after exposure.

The DURHAM Erythema Tester (Hybec Code H606)
The DURHAM Phototesting plate has been designed by Newcastle upon Tyne Regional Medical Physics Department to make Phototesting a simple, quick & reproducible exercise that can be carried out with the minimum of training. It can be used with either Broadband or Narrowband UVB lamps. Just a single exposure results in a series of ten doses of UV, each dose increasing by 26% over the previous dose covering an 8-fold dose range