The firebrick corners are fitted together with L-shaped notches for extra strength. This type of joint lasts longer than the butted joint and the "picture frame" mitered joint found on competitive brands.

The Type-K thermocouple, which reads the firing chamber temperature, is protected in a high-nickel stainless steel sheath for long life. A heavy steel base supports the reversible brick bottom. No extra stand is needed. Use the switch on the front panel to turn off power to the controller when the kiln is not in use.

Both sides of the lid and top rim of sidewall firebricks are hardened and sealed with a refractory coating to protect the ware from dust. The firing chamber, including the lid and bottom, is made of 3” thick firebricks, 20% thicker than standard 2 1/2” bricks.

The Caldera XL has dual mechanical relays for extra reliability. They turn on power to the elements. Two relays last longer than the single relay of competitive kilns because of the reduced amperage going through each relay.

Heating elements are made from the finest high-temperature wire available. Paragon uses heat-dissipating element connectors refined and proven over many years in our kilns. The stainless steel case and lid band include case tighteners for easy maintenance.

The Caldera XL switchbox is coated with a durable high temperature, water-base finish.  The Caldera XL is proudly made in America to exacting standards.

The Sentry Xpress controller fires in either Ramp-Hold or Cone-Fire mode. Control both heating and cooling with simple 3-key operation. The Caldera includes a safety on/off toggle switch.

Features of the Sentry Xpress 3-key Controller for Ceramic Kilns

Specifications