Quality Control System Designed to provide quality assurance and control over x-ray film Process. Protects patients from unnecessary x-ray exposure. Monitors processor performance. Strips Replacement: sold optional Features Tells you when to change your chemicals Protects patients from unnecessary x-ray exposure Indicates the optimum point of replacing chemicals Indicates the condition of the user's chemistry Helps in identifying "over temperature" problems Helps in determine whether the film is under or over exposed Helps in determine whether x-ray problems are processor based or the problem lies within the x-ray film it self Ensures the continuous high quality of x-rays Monitors processor performance Used By Dental Practitioners in Dental Offices, Schools educational programs and practicing Pediatric X-Ray Dental Work & students experience training .