Heat treating furnace

We've been red-hot for nearly a century.

Since 1921, Sentry has been a leader in the heat treating industry. And while other steel tool furnace manufacturers have come and gone, Sentry remains as America's oldest maker of steel heat-treating furnaces. That doesn't happen by accident; it happens because we build top quality products and deliver them with the service our customers demand. Headquartered in Foxboro, MA (near Boston), we've been a fixture on the Northeast's industrial landscape since our founding. See the Sentry Video on this page, to learn a bit more about who we are and how we can help you.


Our broad product line includes the right furnace for you.

Sentry offers a variety of heat treating furnaces, quench systems, pot & tube furnaces, industrial furnaces, tempering & annealing furnaces, hardening furnaces and high-temperature furnaces, as well as heat treating containers and related accessories. 

Look to us for innovations like VakPak65.

In addition to a wide array of accessories specifically designed for use with Sentry furnaces, we also offer VakPak65, our patented heat-treating protective sheath (formerly known worldwide as Sen/Pak). Get all the details here.

Let Sentry solve your heat-treating challenges.

With nearly 100 years of experience, we've seen just about everything when it comes to industrial heat-treating. Bring us your challenges and let the Sentry team help solve them, today.

America’s oldest steel heat treating furnace maker.