6 inch Transparent Photo Evidence Scales
To ensure the accuracy of our forensic scales, Sirchie inspects, measures and verifies them using three standard rulers that are calibrated annually by Precision Measurements Corporation. Click here to see the Certificate of Calibration. This verification follows standards set forth by the National Institute of Standards and Technology. You can review the document Dimensional Review of Scales for Forensic Photography, https://www.nist.gov/publications/dimensional-review-scales-forensic-photography.