Condar FlueGard Thermometer for Double-Wall Stovepipe, 4" Probe (3-39) — Porcelain Enamel Case, Color-Zoned Dial

Condar FlueGard™ Thermometer gives fast, accurate center-of-flue temperature readings for double-wall stovepipe up to 8" diameter.

Designed and built in the USA, the FlueGard™ (3-39) pairs a rugged porcelain-enamel case with Condar’s three-layer probe to deliver reliable readings at a glance. The bright yellow, orange, and red zones printed on the black dial make it simple to monitor flue temperature visually, while the long-lasting probe construction—high-temp steel core, copper cladding and chrome plating—ensures responsive and corrosion-resistant performance in demanding chimney and stovepipe environments.

How does this thermometer measure accurately inside a double-wall flue?

The FlueGard™ uses a 4-inch, three-layer probe engineered for fast thermal transfer and long life. The pure-copper cladding conducts heat quickly to the steel core sensor, and the chrome plating resists scale and corrosion that can degrade accuracy over time.

• 4-inch stem engineered for center-of-flue placement up to 8" diameter.
• Three-layer probe: high-temp steel core, copper cladding, chrome plating.
• Dial displays Fahrenheit and Celsius with color-coded zones for immediate interpretation.

What temperature range and readings can I expect?

The dial reads up to 1700°F (925°C), giving a wide range for wood, pellet, and other solid-fuel appliances. The colored zones (yellow, orange, red) printed on the black case highlight safe, operating, and high-temperature ranges so you can act quickly based on visual cues.

• Maximum reading: 1700°F (925°C).
• Clear yellow, orange, and red zones on a high-contrast black background.
• Both Fahrenheit and Celsius scales on the same dial for flexible use.

How does it install and fit different flue diameters?

Installation is straightforward: drill a 1/4" access hole into the outer wall and insert the 4-inch stem so the sensor reaches the flue center. Condar supplies a magnet and eyelet for secure mounting and easy repositioning when needed.

• Requires a 1/4" hole for stem entry.
• Mounts with included magnet and eyelet for quick, tool-assisted placement.
• Engineered to measure accurately in fluepipes up to 8" diameter.

Why is the porcelain enamel case and probe construction important?

The porcelain enamel finish protects the dial and housing from chips, heat discoloration, and harsh conditions, keeping markings legible for years. Combined with Condar’s layered probe, the overall build prioritizes longevity and consistent thermal response in outdoor and high-heat flue installations.

• Genuine porcelain enamel resists wear and maintains contrast on the dial.
• Rugged steel case for added mechanical protection.
• Packed with corrosion-resistant chrome plating to extend probe life.

Who is this for: The Condar FlueGard™ Thermometer (3-39) is for stove installers, HVAC technicians, woodstove owners, and anyone who needs dependable center-of-flue temperature monitoring for double-wall pipe up to 8" diameter. If you value American-made engineering, visible zone markings for quick decisions, and a probe built to withstand high temperatures and corrosive flue environments, this gauge is designed for you.