Apogee SU-100 Руководство пользователя - Страница 4

Просмотреть онлайн или скачать pdf Руководство пользователя для Аксессуары Apogee SU-100. Apogee SU-100 16 страниц. Ultraviolet sensor

INTRODUCTION

Ultraviolet (UV) radiation constitutes a portion of the electromagnetic spectrum from 100 to 400 nm, and is further

subdivided into three wavelength ranges: UV-A (315 to 400 nm), UV-B (280 to 315 nm) and UV-C (100 to 280 nm). Much of the

UV-B and all of the UV-C wavelengths from the sun are absorbed by the Earth's atmosphere. There are also many artificial UV

light sources available that output a select wavelength range or offer a broadband UV radiation source.

Most UV sensors designed for sunlight measurements are sensitive to UV radiation in the UV-A and UV-B ranges. Apogee

Instruments SU-100 UV sensors detect UV radiation from 250 to 400 nm and are calibrated in photon flux units of micromoles

per square meter per second (µmol m

). The output can also be expressed in energy flux units of watts per square meter

-2

-1

(W m

-2

, equal to Joules per second per square meter).

Typical applications of UV sensors include incoming UV radiation measurement in outdoor environments (not recommended

for continuous outdoor deployment) or in laboratory use with artificial light sources (e.g., germicidal lamps).

Apogee Instruments SU-100 UV sensors consist of a photodiode and signal processing circuitry mounted in an anodized

aluminum housing, and a cable to connect the sensor to a measurement device. Sensors are potted solid with no internal air

space, and are designed for UV radiation measurement in indoor or outdoor environments. The SU-100 outputs an analog

voltage that is directly proportional to UV radiation incident on a planar surface (does not have to be horizontal), where the

radiation emanates from all angles of a hemisphere.