Bellingham + Stanley offers a range of Quartz Control Plates (QCP) for the verification and calibration of polarimeters. QCP are manufactured to the highest standards and can optionally be supplied with a calibration certificate that demonstrates PTB traceability. When used with an ADP polarimeter manufactured by Bellingham + Stanley, a thermal block (mechanical contact with the outside temperature sensor) can be used for additional accuracy. We recommend sending the QCP to our UKAS laboratory at regular, user-defined intervals for inspection and re-certification. If you need help or advice, please contact Bellingham + Stanley or a recognized sales representative.