Volume Calibration

Volume Calibration ; In laboratory analysis, chemical processes, and medical testing, the accuracy of liquid volumes is the most critical factor determining the reliability of results. At Rezonans Calibration, we provide volume calibration services in compliance with TS EN ISO/IEC 17025 standards for all your volumetric equipment, ranging from microliter levels to high-capacity containers.

Even the smallest volumetric deviations in your liquid transfer equipment can directly impact experimental results and production quality. Our expert team minimizes these risks using high-precision scales in controlled laboratory conditions.

What is Volume Calibration and Why is it Essential?

Volume calibration is the process of calculating the amount of liquid contained or delivered by a device (pipettes, burettes, etc.) based on the mass of pure water with a known density (Gravimetric Method).

The benefits of regular volume calibration for your business include:

Analytical Reliability: Ensures laboratory results are repeatable and precise.
Cost Control: Prevents waste by ensuring expensive chemicals and samples are used in exact volumes.
Legal and Standard Compliance: Meets the requirements of quality standards such as ISO 15189 (Medical Laboratories) and ISO 17025.
Device Longevity: Regular maintenance and calibration extend the life of mechanical devices, especially automated pipettes.

Volumetric Equipment We Service

Our Rezonans Calibration laboratory provides services for all glass and plastic-based volumetric measures as well as automated devices:

Device Group	Equipment Calibrated
Automated Pipettes	Single-channel, Multi-channel, and Fixed-volume Pipettes
Glass Laboratory Ware	Graduated Cylinders, Volumetric Flasks, Pipettes, and Burettes
Dispensers and Dilutors	Automated Liquid Distribution Systems
Pycnometers	Density Measurement Containers
Industrial Containers	Standard Measuring Cans and Sample Containers

Precision Measurement Process via Gravimetric Method

Volume calibration requires precise monitoring of variables such as ambient temperature and water density. Our process follows these steps:

Temperature and Humidity Control: Calibration is performed in stabilized climate conditions to prevent evaporation errors.
Gravimetric Measurement: In accordance with the ISO 8655 standard, the mass of pure water is measured using 5 or 6-digit precision analytical balances.
Density and Air Buoyancy Correction: Measured mass values are converted to actual volume using water temperature, air pressure, and density tables.
Certification: An accredited certificate is prepared, including volumetric deviation (systematic error) and standard deviation (random error) values.

Why Choose Rezonans Calibration?

High-Precision Infrastructure: An equipment fleet that ensures the lowest measurement uncertainty, even at micro-volumes.
ISO 8655 Compliance: Internationally recognized methodology for automated pipette calibration.
Experienced Staff: A technical team specializing in chemistry and metrology.
Fast Turnaround: A rapid certification process to ensure your laboratory workflows are not interrupted.

Frequently Asked Questions

How often should pipette calibration be performed?

Depending on the frequency of use, it is generally recommended every 6 to 12 months. For multi-channel pipettes and devices used with corrosive liquids, a 6-month interval reduces risks.

What type of water is used in volume calibration?

The density of the water must be known exactly. Therefore, Type 3 or Type 1 pure water in accordance with the TS EN ISO 3696 standard is strictly used in measurements.

Do pipette tips affect calibration?

Yes. Especially for automated pipettes, the quality and compatibility of the tips used directly affect volumetric accuracy. Performing calibration with the tips routinely used in your laboratory yields the most accurate results.

Why is calibration important for glassware?

When glassware is exposed to heat (e.g., during sterilization in an autoclave), it can expand, leading to permanent deviations in the marked volume lines. This can only be detected through calibration.

Do you also perform pipette maintenance?

Before calibration, we perform leak tests and, if necessary, conduct basic maintenance such as piston lubrication to improve the device’s performance.