Your best results will be using a broody hen. If you are getting eggs locally she should hatch out most of them but know that pea eggs do not travel well so be gentle with them. Shipped eggs are notorious for dislodging internally and a 10% hatch rate will be pretty good if you get any to develop. Large breeders who incubate are happy with a 45% hatch rate which is why the more successful ones will start the eggs under broody hens and pull the eggs after two weeks or let the hens set them until pip.
The thing about incubating pea eggs that is the most troubling is the right humidity setting. Those settings are going to vary from location to location. The temperature is more forgiving, we use 99.6 to 100.2, timing the number of days will tell you if you are using the right temperature. Peas should hatch in the 26 to 28 day range.
Back to humidity, we use 45% to 50% and 60% to 65% in the hatcher. The way you know the right setting for your location is by weighing the eggs before setting and again during the process aiming for a total weight loss of 15% by the time they are due to hatch. We like to set incubators and hatchers in the basement where the humidity and temperature are going to be more steady.
If you are going to only be setting a few eggs one time just use a broody hen and save yourself the headaches.
