The UVA meter model 501 is a meteorological grade instrument that measures UVA radiation outdoors and underwater (5m max depth). This permanent outdoor UVA measurements system is used in weather stations and metrological observatories world wide.

World Class manufacturing practices and NIST traceable calibrations ensure a high degree of reproducibility and comparability from unit to unit.

> An analog model is available with a voltage output which is proportional to the measured UV irradiance. In addition all 501 Radiometers have a controlled internal temperature that ensure a higher level of accuracy as compared to other units.

> Find out how to submit your ultraviolet data to the World Ozone / Ultraviolet Radiation Data Centre

Digital System:

• 501 UVA Detector
• 50' cable
• Power supply for recorder
• Level, circular/bubble
• Recorder
• Internally controlled temperature

Service and Warranty:

Solar Light provides free telephone technical support for the life of our products. We also provide a 1 year Standard Warranty on all of our products covering parts and labor.
> Extended Warranty Plans are also available.

Applications:

• Measurement of ultraviolet radiation from sunlight 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.

Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) maintains a network of Solar Light dataloggers providing UV-index data for major cities and Antarctica. http://www.arpansa.gov.au/uvindex/requests/uvrequest.htm

Internet Data Link Capability:

The Internet Data Link software available with the 501 UVA posts the data recorded by the 501 UVA to a web site allowing the data to be accessed anywhere is the world in real time. 60 day free trial version available!  

> Click here for more information

Configuration:

The model 501 UVA is a complete plug-and-play system including the detector for outdoor use, computerized controller/data logger, and connecting cables. It is easy to install and use. 

Specifications:

Spectral range: 320-400 nm, close to Erythema Action Spectrum

Measurement range: 0 to 10 mW/cm

Angular response: within 5% from ideal cosine for incident angles

Response time: 1 second (0.1 second on demand)

Temperature correction: 1% per °C

RAF: >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)

Weight: 2 lbs (0.9 kg) without cable

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

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

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

> Recorder of Model 501

Temperature range: 0 to +50C

Operating environment: indoors, no water condensation

Features:

> Output: 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.

> 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.

> Communication: 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.

> Power source:  universal 90-250 VAC, 50-60 Hz or 12 VDC.