The Siemens 7ME3960-0DM10 is a pipe damping film for the SITRANS FS220 ultrasonic flowmeter family. It is the accessory that goes between the transducer and the pipe wall on B1, B2, B3, C1 and C2 transducers — the legacy part number CC129-1A-1 cross-references directly. This is a mechanical consumable, not an electronic module. The film ensures acoustic coupling and dampens pipe vibration that would otherwise introduce noise into the flow signal. If you're rebuilding a SITRANS FS220 installation or replacing worn coupling material, this is the factory-specified part.
Compliance note — not RoHS
One thing that will trip up a BOM review: this product is not RoHS-compliant. If your line or end customer requires RoHS conformity (EU directive 2011/65/EU), this part will not pass. REACH Article 33 candidate-list information is available on request — the ledger flags it as Reach Information without listing specific SVHCs, so verify against your local REACH obligations before committing the order.