Measurement of solar ultraviolet radiation and from artificial sources with wavelengths above 320 nm to 400 nm.
Plant, marine, climatological ozone or other biological impact studies that require continuous field measurements over long periods of time.
Correction of spectroradiometric measurement errors cause by the variations of irradiance during the scan.
Measurements for media and research organizations that provide public information about the effects of UV radiation.


digital (UV signal and sensor temperature).

Data acquisition:

dedicated computerized data logger with liquid crystal display, keypad, serial communication port and parallel printer port; accommodates 2 detectors simultaneously; optional analog output.

Dose period:

selectable from 1 minute to 1 hour.

Internal memory:

stores up to six months of 1 hour dose integrals and sensor temperature from two detectors in a nonvolatile memory.

Power source:

universal 90-250 VAC, 50-60 Hz or 12 VDC.

Data integrity:

nonvolatile memory; internal rechargeable power backup for the recording circuitry; automatic temperature compensation corrects data if ambient temperature exceeds specifications or AC power is lost.


compatible with any computer and modem equipped with an RS232 serial port; menu organized remote setup and data retrieval; user selectable baud rate from 300 to 9600 bps.

Spectral range:

320-400 nm, non-weighted

Measurement range:

0 to 10 mW/cm2

Angular response:

within 5% from ideal cosine for incident angles

Response time:

1 second (0.1 second on demand)


>1 (Radiation Amplification Factor calculated for 30 deg solar zenith angle and 0.27 cm ozone column)

Operating temperature:

-40 to +50 degC ambient

Operating environment:

outdoors or underwater (max. depth 15 feet or 5 meters)


2 lbs (0.9 kg) without cable


5.5" H x 5.9" Diam. (14 x 15 cm)


Hermetic connector at detector end; 50 ft standard length, up to 200 ft. can be ordered; approx. weight 0.1 lbs per ft


3 leveling legs locked in a quick release base; circular level mounted on the detector

Analog Detector.

UV Signal Output: 0-2.5V, 0.250[V/(mW/cm2)], 0.5mA max

Sensor Temperature output:

0-1V, 1V=25°C, sensitivity 20mV/°C, 0.5mA max

Power Requirements:

5.5-25V/5mA max for signal circuit. 11-15V/1A max for temperature stabilization

Recorder of Model 501

Temperature range:

0 to +50C

Operating environment:

indoors, no water condensation

• UVA model 501 radiometer Meters_Model-501-UVA-.pdf


app114.pdf UV and Ozone Measurements provide Meteorological Data (34Kb)
Ultraviolet radiation as applied to photoclimatherapy at the Dead Sea (114K) A.I. Kudish, PhD, D. Abels, MD, and M. Harari, MD - International Journal of Dermatology 2003, 42, 359-365
Inter-comparison of the solar UVB, UVA and global radiation clearness and UV indices for Beer Sheva and Neve Zohar (Dead Sea), Isreal (259K) A.I Kudish, V. Lyubansky, E.G. Evseev, A. Ianetz - Energy 30 (2005) 1623-1641
The Measurement and Analysis of Normal Incidence Solar UVB Radiation and Its Application to the Photoclimatherapy Protocol for Psoriasis at the Dead Sea, Israel Avraham I. Kudish, Marco Harari and Efim G. Evseev - Photochemistry and Photobiology, 2011, 87: 215–222
The analysis of ultraviolet radiation in the Dead Sea basin, Isreal (126K) A.I. Kudish, E. Evseev, A.P. Kushelesky - International Journal of Climatology, Vol.17 1697-1704 (1997)
Statistical relationships between solar UVB and UVA radiation and global radiation measurements at two sites in Isreal (165K) A.I. Kudish, E. Evseev - International Journal of Climatology, Int. J. Climatol. 20: 759-770 (2000)
Statistical analysis and inter-comparison of the solar UVB, UVA and global radiation for Beer Sheva and Neve Zohar (Dead Sea), Isreal (256K) A.I Kudish, V. Lyubansky, E.G. Evseev, A. Ianetz - Theor. Appl. Climatol. 80, 1-15 (2005)
app118.pdf Interfacing the 501 Biometer to a Campbell data logger (37Kb)
UV-Biometer - A Broad Band Instrument Complementing Ozone Measurement With Ground Based UV ExposurePresented at Quadrennial Ozone Symposium Charlottesville, Virginia, USA June (1992) Daniel Berger, Marian Morys
Calibration of The Broad Band Radiometer(describes 501 Radiometer calibration) Daniel Berger, Marian Morys
The Accurate Measurement of Biological Effective Ultraviolet Radiation. (135K) Paper was presented at the International Symposium on High Latitude Optics, Tromso, Norway, July 1993 Marian Morys, Daniel Berger
A Variable Sky-View Platform for the Measurement of Ultraviolet Radiation using the Model 501-UVA Radiometer. From Journal of Atmospheric and Oceanic Technology Vol. 20.
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