A-M Systems and Hans Rudolph recommend an annual re-calibration of your syringe to ensure calibration accuracy.
For a A-M Systems syringe please call 1-800-426-1306.
The customer service phone number is also printed on the side of your syringe for reference.
For a Hans Rudolph syringe please call 1-800-456-6695.
The Hans Rudolph customer service phone number is also printed on a label near the base of the syringe.
Medical Graphics Corporation
350 Oak Grove Parkway
St. Paul, MN 55127 U.S.A.