This is a new old stock Wisconsin KVP Test Cassette for X-Ray units. There is an optimum peak tube potential for each x-ray study. If the kvp settings are in error, important details may be missed by the x-ray.The kvp can be simply and accurately measure with this device as described in the instruction manual. Retail price on these is over $1400. Please feel free to email me if you have any questions,Thanks.
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