how accurate is the thermometer? I've used one of these types before in my breville and it gave the wrong temperature of the inside of the oven.

The only way to make sure a thermometer is accurate is to calibrate it. This is done by boiling water and using the thermometer to test the water. If the thing reads 121 degrees, it is accurate. If not, then it needs to be calibrated...that is, the dial needs to be rotated in relation to the dial so it reads 212 degrees. From what I see, most dial type oven thermometers are no longer manufactered with a small nut on the back to allow calibration. Find an old one at a yeard sale and you might be able to.

The description says this thermometer is over 6" tall. That sounds rather large, can anyone confirm?

The 6 inch measurement is for the display card it is attached to. This is typical for Amazon descriptions for items of this kind. As stated in other answers, the thermometer itself is 3.5 inches tall

I'm looking at the picture...why is 0c almost lined up with 30f, shouldn't it be 32f, which it has a perfect mark for?

I received two of the refrigerator thermometers on 3/12/22 and 32F is lined up precisely with 0C. Evidently it's been fixed.

Is there Mercury in this thermometer?

No. It has a steel spring inside.

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🌟 Keep it cool, keep it safe—instant precision for the savvy pro!

BUILT TO LAST - Durable stainless steel body with shatterproof lens withstands busy commercial kitchens.
CERTIFIED FOOD SAFETY - NSF certification guarantees compliance with strict food safety standards for peace of mind.
EFFORTLESS MONITORING - Mechanical dial display offers instant, battery-free temperature checks—no downtime, no fuss.
PRECISION YOU CAN TRUST - Accurate temperature readings within ±0.5% ensure your food stays perfectly safe.
VERSATILE COMPATIBILITY - Ideal for refrigerators, freezers, coolers, and mini-fridges—one tool for all your cooling needs.

The Rubbermaid Commercial FGR80DC thermometer delivers instant, battery-free temperature readings from -20°F to 80°F with ±0.5% accuracy. Crafted from durable stainless steel with a shatterproof lens, it’s NSF certified for safe use in all refrigeration and cooling appliances, making it an essential tool for professional food safety management.

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Manufacturer	Rubbermaid Commercial Products
Part number	FGR80DC
Item Weight	45.4 g
Product Dimensions	5.08 x 11.43 x 15.56 cm; 45.36 g
Is Discontinued By Manufacturer	No
Size	1 Pack
Color	Silver
Style	Refrigerator/Freezer/Cooler Thermometer
Material	stainless steel
Item Thickness	1 Inches
Power source type	Battery Powered
Number Of Pieces	1
Temperature Range	-20/80 華氏
Measurement Accuracy	+/-0.5%
Display Style	Dial
Specification met	NSF
Special Features	Waterproof
Included Components	1 x Thermometer
Batteries Included	No
Batteries Required?	No
Item Dimensions LxWxH	5.1 x 11.4 x 15.6 cm

(2.0 inches (5.1 cm), Refrigerator/Freezer - Rubbermaid Commercial Refrigerator/Freezer Thermometer, Stainless Steel, FGR80DC

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