ELDONET Dosimeter

Three-channel dosimeter for continuous monitoring of solar and artificial radiation:
- UV-B (280 - 315 nm)
- UV-A (315 - 400 nm)
- PAR (400 - 700 nm)

Temperature internally controlled (30°C) to prevent spectral shifts due to temperature changes
Dynamic range 2^12
External temperature measurement
Level gauge for exact horizontal alignment
Depth gauge in aquatic instruments
Ulbricht integrating sphere for direct and diffuse radiation
Custom-made hemispherical quartz dome
Sensitive UV and VIS photodiodes
High precision integrated circuits with low voltage offset and temperature compensation
Superior linearity and long-term stability of calibration
Low cosine error

Resolution
- < 0.1 W/m^2 (PAR)
- < 0.01 W/m^2 (UV-A)
- < 0.0005 W/m^2 (UV-B)
12 Bit A/D conversion and digital output (RS232) for automatic computer measurements, compatible with any computer with serial port
115/230 VAC or 12 VDC power; backup power supply optional
Rugged, fully weatherproof instrument case
Terrestrial or underwater measurements
Size 250 x 200 x 185 mm (length x width x height), 3150 g without cables
Cable 15 m (45 feet); radio transmission of the RS232 signals optional
Temperature range -40 to 70°C
Frequent measurements (ca. 60 per minute) and integration over 1-min intervals
Ease-of-use software (WINDOSE) for WINDOWS and WINDOWS 95 for online measurements and graphical and numerical display

Automatic data recording in ASCII files
Software to calculate hourly, daily, monthly and annual doses
High accuracy due to spectroradiometric calibration with PTB traceable quartz halogen calibrated lamps

Applications

The ELDONET represents a major advancement in solar radiation measurement. The versatile, low cost three-channel dosimeter makes it an ideal instrument for short-term and long-term measurement of solar and artificial radiation with high precision
The ELDONET instruments are currently being installed in a dosimeter network funded by the European Commission including terrestrial, aquatic and high altitude stations