The Oakton WD5340542 DO 2000 Polarographic Dissolved Oxygen Controller, 1/4-DIN, 80 to 250V gives fast, reliable results with minimal flow rates and short polarization times. Polarographic - also referred to as amperometric - DO systems are commonly used in biological processes due to the compatibility of the probe materials.

The controller has four relays with time delay capabilities: two set point relays, one wash relay, and one alarm relay. Dual-scalable 4 to 20 mA outputs for DO and temperature provide data for control or recording. Menu-driven setup program with three-level password protection provides easy and secure programming. UV-protected LCD with back lighting allows installation in wet environments and visibility in low light environments.