Oxygen Sensor OxyGuard Ocean D.O. Probe Back Catalog number: 450536 Availability: In the manufacturer's stock Price on request - + Recommended 443591 Visibility Disc acc. to Secchi, 3m steel rope, ma Price on request 439013 Conductivity Sensor type SST, max. depth 6.000met Price on request 438150 Plastic Net Bucket with snap-in bolt Price on request