J-Series UV Meter (top image)

The J-Series UV intensity Meter is a photovoltaic device for measuring the intensity of UV light sources. This unit is ideal for monitoring germicidal lamp irradiance, measuring Q.C. inspection lamps, and producing accurate and repeatable measurements for critical experiments. All J-Series Meters are certified to be within UVP’s published standards and traceable to the National Bureau of Standards.

The Model J-225 measures the intensity of shortwave UV light sources. The sensor is sensitive within a range from 220 to 280nm with a maximum sensitivity at 254nm.
Long wave intensity readings are made with the J-221. The long wave sensor is sensitive from 300 to 400nm with a peak sensitivity at 365nm. The J-221 is specified for many government applications and complies with government standards MIL-I-6868D and NSN-6635-488-5451.
Each unit features plug-in type sensors and two scales for low and high intensity readings. For remote readings, a 4ft (1.22m) extension cord connects the sensor to the meter. To ensure accurate measurements, an IR filter is included for measuring lamps which produce infrared radiation. Also, a reduction screen can be used to attenuate the UV for very high intensity lamp measurements.
Designed for ease of use operation, the J-Series UV Meter provides a reliable method for monitoring UV light source efficiency.

UVX Radiometer (bottom image)

Maximum operating efficiencies of UV systems rely on proper knowledge of the lamp intensities. Gradual degradation of UV intensity is very difficult to detect and measurement of lamp irradiance is the most effective way to monitor the useful life of any UV light source.
The UVX hand held radiometer is a state of the art measuring device ideal for obtaining accurate and repeatable UV irradiance measurements. The unit features three interchangeable probes sensitive in the 254nm, 365nm and 302nm regions of the ultraviolet spectrum. All sensor calibration are traceable to National Bureau Standards to ensure precise readings.
The UVX continuously monitors its own power and indicates low voltage conditions. The unit also includes automatic self-test circuitry, read/hold switch, measurement range from 0.1 to 19,999 microwatts/cm, 31/2 digit LCD readout, ±5% accuracy, ±1% linearity, and 120 hour battery life. Range changes are made with a three position range switch. Also the sensors feature 3 foot (915mm) electrically shielded cables and are designed to minimise errors due to temperature and humidity effects.
Optional accessories include a tube guide for use with UV tube light sources, chart recorder output, and a 10:1 attenuator for measuring UV irradiance levels higher than 19.99 milliwatts/cm .
Built to withstand day-to-day use in laboratory and production environments, the UVX Radiometer is a complete UV measuring system ready to use and easy to operate.

See also UV Protective Eyewear






J-225 UV Intensity Meter - shortwave.






J-221 UV Intensity Meter - longwave.






UVX-25 Radiometer with 254nm sensor.






UVX-25 Radiometer with 300nm sensor.






UVX-25 Radiometer with 365nm sensor.





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