Paragon PMT21 Furnace W21"xD21"XH13" Sentry Digital 12 key
IMPORTANT NOTES ON ORDERING:
These are shipped directly from Paragon. Lead time is 4-6 weeks.
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To find out the shipping you can contact us via email. Please send your shipping address, which oven and the best way to contact you. We will get the quote from Paragon and get back to you. Or you can call us at 507-720-6063 and we will get a quote for you.
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Machine shops save time with a furnace at their disposal in their own shop. You will no longer send a die out for heat treating, wait for its return and then send it out again for additional heat treating.
The door swings open with one-handed operation. The PMT-21 furnace is insulated with refractory firebrick. The elements are mounted in dropped, recessed grooves machined into the firebrick. Paragon invented this type of groove in 1952. This groove protects the element for long life and low maintenance. Elements are simple to replace because theyre exposed rather than embedded. You can thread new elements into place following clear instructions in the manual.
The firing chamber is protected by a steel case painted in high temperature blue. A built-in stand lifts the firing chamber safely off your worktable, so no extra stand is needed. The door is mounted with a heavy-duty hinge for smooth opening. A micro-switch shuts off the power to the elements when the door is opened. We use high temperature wire in the switch box for long life. A heat shield, mounted between the switch box and furnace, helps keep the switch box components cool even during extended operation. To further dissipate heat, the switch box is extra large and generously louvered. Each furnace comes with a cord and plug for immediate installation and a one year warranty.
Your furnace includes a wiring diagram, programming instructions, and heat treating manual. The manual gives you basic heat treating instructions for D2, 440C, ATS 34 and 154 CM. The manual is written in plain English for the beginner.
Optional Gas Injection Flow Meter
During heat treating, scale forms on the surface of the steel. One way to eliminate most scaling is to wrap the steel in stainless steel foil. An easier way is to install the gas injection flow meter on your furnace. It is available as either an add-on kit, or you can order the furnace with the meter installed.
The meter regulates the flow of an inert gas, such as argon, inside the furnace. The gas displaces the oxygen to prevent most scaling.
Sentry Digital 12-key Non-Ceramic Control Type
Paragon digital kilns are powered by either the 12-key Sentry micro processor or the smaller 3-key Sentry Xpress. These micro processors are the result of intensive effort between Paragon Industries, L.P. and Orton Ceramic Foundation. The controllers add convenience and accuracy to your firings.
Owning a Sentry is like hiring an assistant to watch your kiln. Nevertheless, please remember that you should monitor the kiln occasionally during firing, especially near the expected shut-off. (We do not warrant against over-fires.)
Sentry 12-Key 2.0
Most Paragon ceramic kilns use the Sentry 12-key. Some of its exciting features:
The Sentry 2.0 can be installed on all existing Paragon 12-key digital kilns. It uses the same size faceplate as the earlier DTC 100 - 1000 series. Upgrade a switch-operated kiln with the wall-mount version.
The thermocouple senses temperature inside the kiln. The standard thermocouple on most Paragon kilns equipped with the Sentry 2.0 is the ¼ Type-K. It is hermetically sealed in a metal sheath for long life. It replaces the earlier 1/8 thermocouple.
Though a precision instrument, the thermocouple wears with use, resulting in a gradual shift in temperature readout. (This wear occurs mostly above 2000°F.) If you fire pottery, consider the deluxe Type-S, noted for its extreme longevity.
Ramp-Hold Custom Programming
Ramp-Hold allows you to infinitely adjust each part of the firing cycle. Vary the firing to obtain different effects from the same glaze.
Ramp-Hold programs are made of segments. Each segment has a temperature, firing rate, and, if desired, a temperature hold.
The Auxiliary Output is available on most Paragon TnF kilns. The AOP is a relay-powered electrical receptacle mounted to the kiln. You can plug an Orton KilnVent into the AOP to control when the vent operates during firing.
Three Zone Firing
Standard TnF kilns are single zone; 3 zone is optional on 10- and 12-sided TnF kilns. Three zone is now faster and more accurate than on previous 3 zone controllers because of the Sentrys time-temperature algorithm. This eliminates the temperature lag adjustment.