YSI PRO Series 20i - Dissolved Oxygen Meter (Integral Cable Kit) geotech geopump Four gas calibration mix

Four gas calibration mix

a separate circuit overrides the IR signal and makes the light and tone intermittent

These ISE (ion-selective electrode) sensors thread directly into your instrument's field cable — no tools required

Calibration Gas & Regulators

The Honeywell MultiRAE is a portable

YSI PRO Series 20i - Dissolved Oxygen Meter (Integral Cable Kit) geotech geopump Four gas calibration mixThe YSI Pro20i is a dissolved oxygen and temperature meter with an integral (non detachable) field cable a direct replacement for the discontinued Model 55 and 550A. Every configuration ships complete: handheld, cable, and DO sensor included, so there's nothing else to add. Choose a Polarographic DO sensor for long sensor life, or a Galvanic DO sensor for immediate sampling with no warm up. IP 67 waterproof, 1 meter drop tested, and EPA approved for