Oxygen Sensor OxyGuard Ocean D.O. Probe Back Catalog number: 450536 Availability: In the manufacturer's stock Price on request - + Recommended 439016 Pressure Sensor max. depth 3.000metres (or to be Price on request 438110 Mechanical Flow Meter Price on request 443591 Visibility Disc acc. to Secchi, 3m steel rope, ma Price on request