J-221 analog UV (blacklight) light meter
J-221 meter measures the intensity of longwave UV (365nm).
The sensor is sensitive from 300 to 400nm with a peak sensitivity at 365nm.
Meter features two scales for low and high intensity readings.
For remote readings, a four foot (1.2m) cord connects the sensor to the meter.
An infrared Filmter assures accurate readings when measuring light sources producing infrared radiation.
The 5X attenuation screen can be used for very high intensity lamp measurements.