DSI offers both repair and calibration for Validyne Transducer.  The Validyne Transducer is manufactured by Validyne Engineering.  They also offer both repair and calibration for the Validyne Transducer.  

It is faster and less expensive to contact Validyne Engineering directly.  Go to Validyne Support RMA and fill out their Return Material Authorization form.  Validyne can provide information on costs and instructions on how to return the product.

To have a Validyne Transducer repaired or calibrated by DSI, simply contact DSI support at support@datasci.com.