Description

An egg candler is a tool used to illuminate the inside of an egg, allowing you to check embryo development, fertility, and shell quality—without breaking the shell. A bright light source (often LED) is placed against the blunt end of the egg. The shell becomes semi-transparent, allowing you to see inside: Embryo movement Blood vessels Air cell size Cracks or defects in the shell Purpose What to Look For Fertility By Day 5–7: Look for blood vessels and embryo shadows Embryo Development Watch movement and growth progress Air Cell Monitoring Air cell enlarges as egg loses moisture—important for hatchability Cracks/Defects Detect hairline cracks, double yolks, or rots Egg Grading (non-incubation) Quality control before sale or consumption