ECC Model 820-kVp/mAs X-ray Meter
The Model 820 kVp/mAs X-ray meter measures kVp from 45-125kVp or 40-115kVp (820L). The 820 can measure 0mA - 2A(2000mA).
This instrument also measures exposure time and using it is as easy as turning it on and placing it in the x-ray beam.
