SentroTech ST-1500°C Muffle Furnace: This furnace has a large chamber (242 x 242 x 260 mm) and can reach a maximum temperature of 1500°C. It also has a PID controller with 30-segment programmable temperature control.
Changzhou Lab 1500°C Muffle Furnace: This furnace is smaller than the SentroTech furnace, but it is still capable of reaching 1500°C. It has a PID controller with 10-segment programmable temperature control.
Hunan Chengyi M1522 Muffle Furnace: This furnace is a good option for those on a budget. It has a maximum temperature of 1350°C and a PID controller with 30-segment programmable temperature control.