Developing technology capable of onsite medical diagnostics is crucial for health-care delivery in clinical and emergency settings. To perform on-site diagnostics, health-care practitioners need compact, inexpensive, and user-friendly equipment. Alentic Microscience has developed a system that uses small volumes of blood for cell counting and serum tests, occurring at the site of blood extraction. This system makes single molecular layers of reagents on the sensor surface, which when exposed to light allow the system to provide valuable diagnostics about the sample.