Rod Held Current Meter RHCM Back Catalog number: 445515 Manufacturer: HYDRO-BIOS Availability: In the manufacturer's stock Price on request - + Recommended 450536 Oxygen Sensor OxyGuard Ocean D.O. Probe Price on request 439015 Analog Channel incl. calibration for AMT oxygen an Price on request 443590 Visibility Disc acc. to Secchi, 3m steel rope, ma Price on request