The polarographic dissolved oxygen analyzer (hereinafter referred to as the instrument) is an online water quality monitoring instrument with a microprocessor. Widely used in industrial water, domestic water and sewage treatment, as well as animal husbandry. Continuous monitoring and control of oxygen content in aqueous solutions. The instrument adopts LCD liquid crystal display screen; Intelligent Chinese menu operation; Equipped with current or voltage output, freely adjustable measurement range, high and low limit alarm prompts, and two sets of relay control switches, with adjustable hysteresis range; Automatic or manual temperature compensation, electrode automatic calibration.

The oxygen electrode uses platinum (Pt) as the cathode, Ag/AgCl as the anode, 0.1M potassium chloride (KCl) as the electrolyte, and a silicone rubber permeable membrane as the breathable membrane; When measuring, a polarization voltage of 0.68V is applied between the anode and cathode. Oxygen is consumed at the cathode through the permeable membrane, and the amount of oxygen passing through the membrane is proportional to the concentration of dissolved oxygen in water. The maximum diffusion current between the electrodes is proportional to the concentration of dissolved oxygen in water. The instrument detects this current and converts it into oxygen concentration through calculation. At the same time, the thermistor detects the temperature of the solution and compensates for the temperature of oxygen concentration.

Intelligence: Using a single-chip microprocessor to complete dissolved oxygen value measurement, temperature measurement, and compensation;

Human computer dialogue: The menu operation is simple, and users can operate it by following the prompts on the screen;

Multi parameter display on the same screen: simultaneously display dissolved oxygen value, temperature value, and working status;

Software setting output mode: The software selects 0-10mA or 4-20mA output;

The measurement range and alarm upper and lower limits can be freely set;

Alarm prompt for upper and lower limit exceeding limits;

Two sets of relay control, with adjustable hysteresis control range;

Self setting password and service guide: Users can set or modify their own password to prevent unauthorized personnel from entering and causing misoperation;

Provide technical support and after-sales service contact methods for users;

Chinese and English menus are optional;

Capable of installing independent storage cards with data recording, storage, and export functions.