Drift monitors test the stability of the XRF instrument over time. They provide a simple way to test the set-up's repeatability on a short-term and long-term basis. Accurate calibration of a product's series of elements is tedious and costly.
The monitor composition is chosen to match the particular material under test closely. Using a stable monitor means the calibration procedure must be carried out only at long intervals. The monitors have been formulated to have appropriate count rates when analyzing the different ores and products. They contain little flux and have good long-term stability. Most monitor types have been in use for many years. They are polished flat so that they can be mounted precisely and are easily cleaned.
The XRF Scientific drift monitor Ausmon was developed based on many years of experience creating stable, repeatable beads. It is available for all standard analysis requirements.