Watlow designed and manufactured the first swaged cartridge heater and revolutionized the heating element industry.

With premium materials and tight manufacturing controls, Watlow's cartridge heaters (insertion heaters) provide superior heat transfer, uniform temperatures, resistance to oxidation and corrosion and long life even at high temperatures. Customers benefit from Watlow's custom designs, on-time delivery, quality and technical assistance.

Cartridge / Insertion heaters have a wide range of process applications including their primary use for platen heating.

Product		Material	Maximum Operating Temperatures		Maximum Watt Densities
			°F	°C	W/in2	W/cm2
	FIREROD Cartridge Heaters	Incoloy®	1400	760	400	62
		Stainless steel	1000	538	400	62
	High Temperature FIREROD	Incoloy®	1800	982	100	15.5
	Metric FIREROD Cartridge Heaters	Incoloy®	1400	760	330	50
	MULTICELL Insertion Heaters	Alloy	2050	1120	30	4.6