How accurate are bimetal thermometers?

Bimetal thermometers use two strips of different metals to convert temperature into mechanical displacement. As purely mechanical devices, they display only the current temperature on their dial. They can be accurate to about 1% full span.

What is a bimetal thermometer?

The bimetallic strip constitutes one of the most trouble-free and durable thermometers. It is simply two strips of different metals bonded together and held at one end. When heated, the two strips expand at different rates, resulting in a bending effect that is used to measure…

How do you calibrate a bimetal thermometer?

Bimetallic stemmed thermometers are calibrated using the ice-point method. Calibrate on a regular basis and after using the thermometer with very hot or very cold foods, or after dropping or jarring it. In a clean styrofoam cup, make an ice water slush by filling the cup halfway with ice cubes and the rest with water.

What temperature should a bimetallic stemmed or digital thermometer be?

Bimetallic thermometer calibration Make sure the stem does not touch the bottom or sides of the glass. Let it sit until the dial stops moving. If the thermometer is accurate, it should measure 0 ° C or 32 ° F.

What is the range of bimetallic thermometer?

Bimetallic thermometers are widely used in industry. Their typical range is from 40–800 (°F). They are often used for two-position temperature control in residential and industrial thermostats.

Where are bimetal thermometers used?

The bimetallic strip consists of two different metals having different coefficients of thermal expansion. Bimetallic thermometers are used in residential devices like air conditioners, ovens, and industrial devices like heaters, hot wires, refineries, etc.

When should a bimetal stemmed or digital thermometer be calibrated?

Thermometers should be calibrated: before use; if dropped; when going from one temperature range to another; and after a long storage time.

How long should you wait for a bimetallic stemmed thermometer?

Insert the thermometer stem or probe into the thickest part of the food, wait 15 seconds or until the reading is steady then take another reading in a different spot.