KNOWLEDGE SECTION

Temperature measurements

Bimetallic dial thermometer being calibrated in an ice-water slurry

What Is the Purpose of Calibrating a Bimetallic Thermometer?

Learn why bimetallic thermometer calibration matters for accurate readings, HACCP records, food safety checks, and field adjustment.

Digital room thermometer measuring indoor air temperature

How Accurate Are Digital Room Thermometers?

Learn what affects digital room thermometer accuracy, how to read accuracy ratings, and where to place sensors for representative room readings.

Bimetallic dial thermometer being checked in an ice-water bath

When to Calibrate a Bimetallic Thermometer

Learn when to calibrate a bimetallic thermometer, including first use, impact, severe temperature exposure, routine checks, and erratic readings.

Bimetallic dial thermometer calibration in an ice bath

How to Restore Accuracy in a Bimetallic Thermometer

Learn how to calibrate a bimetallic thermometer using ice-point or boiling-point references, and when replacement is the better option.

Digital thermometer probe positioned in an ice-water bath

How to Calibrate a Digital Thermometer

Learn how to calibrate a digital thermometer using ice-point and boiling-water checks, with probe placement, adjustment, and troubleshooting tips.

Digital thermometer probe measuring temperature for an electronic display

How Digital Thermometers Measure Temperature

Learn how digital thermometers work by converting sensor resistance or voltage into digital temperature readings through ADCs, calibration, and display logic.

Bimetallic dial thermometer used for temperature measurement

How Accurate Is a Bimetallic Thermometer?

Learn how bimetallic thermometer accuracy is defined, how ASME B40.3 grades apply, and how insertion depth, stress, and calibration affect readings.

Digital thermometer probe and display used for temperature measurement

How Accurate Are Digital Thermometers?

Learn how digital thermometer accuracy is specified, including full-scale vs reading-based tolerance, probe effects, RTDs, calibration, and readability.

Dial bimetallic thermometer with sensing stem and pointer

How a Bimetallic Thermometer Works

Learn how bonded metals with different thermal expansion bend into coil motion, move a pointer, and provide local temperature indication.

Thermowell installed in a pipe for temperature sensor protection

How a Thermowell Works in Temperature Measurement

Learn how a thermowell protects temperature sensors, contains process pressure, conducts heat, and supports maintenance without opening the process.

Temperature sensor installed inside a thermowell in process piping

What Is a Thermowell and How Does It Protect Temperature Sensors?

Learn how a thermowell protects temperature sensors, isolates the process, and affects pressure, flow, vibration, corrosion, and response time.

Technician calibrating a temperature transmitter with a process calibrator

Temperature Transmitter Calibration: RTD and Thermocouple Procedures

Learn how to calibrate temperature transmitters with RTD and thermocouple inputs, including sensor validation, test points, error checks, and loop restoration.