Our incubators keep selling themselves. We often hear from customers who want a Percival incubator after using older models that still work as well as the first day they were plugged in. Doctoral students, impressed with the accurate, reliable performance of our incubators in their university labs, many times become customers when they start their own labs and want the most value for their investment. Known for their precise control of lighting, temperature and humidity, Percival incubators can last for decades with very little maintenance.