Thermometer Calibration Services

Thermometers provide high-precision temperature measurements that are essential in numerous applications. Common uses include determining whether equipment operates at a safe temperature in manufacturing settings and providing researchers with data needed for testing materials in medical or agricultural contexts. The calibration of thermometers to ensure the accuracy of measurements is essential for this reason.

Garber Metrology is an ISO 9001:2015 registered company and holds ISO/IEC 17025:2017 and ANSI/NCSL Z540-1-1994 accreditations.

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Expert Calibration for a Range of Thermometers

We calibrate thermometers from top brands, such as Fluke, Defelsko and Thermco, ensuring your critical instruments provide accurate and repeatable measurements. If your application requires it, we provide a NIST-certified thermometer calibration, demonstrating the results and confirming that the device meets the required standards.

We use highly accurate reference thermometers to determine whether your instrument provides the proper readings. We also record data about the thermometer calibration as it was sent to us and when we sent it back.

Several thermometer types are used regularly in laboratory settings, each with particular calibration requirements. Here is how to calibrate a thermometer based on its type:

Liquid-in-Glass Thermometer Calibration

For thermometers with mercury or alcohol, our experts implement these steps during calibration:

1. We immerse the thermometer in a stable, known temperature, like a liquid calibration bath or a dry-block calibrator, to ensure accurate readings.
2. Our technician compares both readings.
3. If there is a difference, we create a correction table that shows the necessary offsets at various temperatures since physical adjustment is impossible.

Infrared Thermometer Calibration

Calibrating these thermometers is slightly different because they do not directly touch the object being measured. Our process involves the following:

1. Using cavities with well-known emissivity values (blackbodies), we take temperature measurements with the thermometer and a radiometrically calibrated calibrator.
2. We compare the reading on the infrared thermometer to the known temperature of the black body calibrator.
3. We account for factors like the distance from the target and the field of view. If discrepancies exist, we either perform an electronic adjustment, if the thermometer supports it, or create a correction table.

Digital Thermometer Calibration

Like liquid-in-glass thermometers, we calibrate these devices using a liquid calibration bath or a dry-block calibrator. The main difference is that this calibration focuses on electronic precision. Below is how it works:

1. We place the digital thermometer’s probe in a dry-block calibrator or a precision liquid bath, alongside a highly accurate reference thermometer.
2. Our technicians check the readings at various temperature points to verify the thermometer is accurate across its entire measurement range.
3. If the readings are off, we adjust the digital thermometer electronically using its built-in calibration functions to bring it back into specification.