backPossible calibrations:
| Measurand | Symbol | Unit | Energy range | Radiation qualities acc. to |
| Air kerma | Ka | Gy | 10 kV - 300 kV Cs-137, Co-60 | ISO 4037, IEC 61267 |
| Absorbed dose to water | Dw | Gy | 10 kV - 300 kV | DIN 6809-4 |
| Air kerma-lenght product | PKL | Gy m | 40 kV - 150 kV | IEC 61267 |
| Air kerma-area product | PKA | Gy m2 | 40 kV - 150 kV | IEC 61267 |
| Practical peak voltage | Û | V | 20 kV - 150 kV | IEC 61267 |
Download complete list of radiation qualities available for calibrations.
Catalogue of unfiltered x-ray spectra up to 50kV
PTB information on ICRU90 changes to calibrations in air kerma
Directions for clients:
Inquiries concerning calibrations
Clients address their inquiry (for example via the e-mail address 
CaliGray(at)ptb.de) to the contact person listed on the right-hand side of this page. The inquiry must include the order form for calibrations. In response information will be provided on the time and estimated costs of the calibration and who should be contacted for further steps.
Procedure after acceptance of the calibration order
Once the order has been placed the customer will receive a confirmation and he should send the equipment to the person in charge at PTB, where the equipment will be calibrated in compliance with the specifications of the order. After calibration, the dosemeter will be returned to the customer together with a calibration certificate which states the calibration factor and its uncertainty as well as the reference and calibration conditions.
Calibration costsFees and charges