Visibility Disc acc. to Secchi, 3m steel rope, ma Back Catalog number: 443590 Manufacturer: HYDRO-BIOS Availability: In the manufacturer's stock Price on request - + Recommended 439016 Pressure Sensor max. depth 3.000metres (or to be Price on request 450536 Oxygen Sensor OxyGuard Ocean D.O. Probe Price on request 438116-IN Electronic Flow Meter for MultiNet Price on request