During calibration data loggers are compared to a reference meter that has been calibrated in a UKAS (United Kingdom Accreditation Service) approved laboratory. The certificate lists the value recorded by the reference meter (the points at which the data logger was tested), the value recorded by the data logger and the error between the two readings. In addition to the reading information, calibration certificates also list the test method and the details of the equipment used to provide traceability back to national standards.

Calibration certificates do not have a period of validity; they are simply a statement of what the unit was reading when it was tested. That said, unless the application is particularly critical or demanding, most people get their loggers calibrated annually.

Even if you don't purchase calibration certificates, we guarantee that our loggers will meet the accuracy figures specified on our datasheets at the point of purchase.

Calibration Points

For CO2 loggers, our calibration points are:

• 0 to 2,000ppm units: 500, 1000 and 1,500ppm
• 0 to 5,000ppm units: 500, 2,500 and 4,000ppm