Orbisphere3650 portable dissolved oxygen analyzer

Orbisphere 3650Portable dissolved oxygen analyzerSuitable for analyzing dissolved oxygen content in pure water，It is a sturdy and durable stainless steel design that can measure the dissolved oxygen in cold wort, and can withstand harsh conditionsUsed in an environment that is resistant to CIP high-temperature cleaning and can withstand pressures up to 100 bar; Convincing accuracy and response time, quickly reflecting changes in dissolved oxygen during the process. Durable and waterproof, 3-digit LCD display with background lighting. Measurement range: 1ppb-80ppb, it can measure both the dissolved oxygen of beer in large cans and bottled beer.

The dissolved oxygen meter is an instrument designed to measure the oxygen content in water based on the principle of electrochemistry, which states that oxidation-reduction reactions occur on two different metal electrodes in an oxygen-containing electrolyte solution. The resulting diffusion current is related to the oxygen concentration in the solution. Some instruments also use the principle of polarography in voltammetry, which applies voltage to the working electrode in a solution and generates a polarographic graph showing a certain relationship between the current and the concentration of the substance being measured in the solution.

The dissolved oxygen meter protects the epoxy sensor by reducing the residual signal to a negligible level, so there is no need for dedicated zero point calibration. Oxygen sensor calibration is very simple and fast, just expose it to air and press the CAL key three times. The calibration key can be electronically locked to prevent accidental operation. This oxygen sensor technology also has a short response time, which is crucial for conducting multi parameter analysis. When the analyzer performs a single analysis, this oxygen sensor technology becomes particularly important, such as for ppb level oxygen concentration analysis, where the oxygen probe may have been exposed to air before. The oxygen probe is equipped with a stainless steel wire mouth protective cap, which can tightly seal the membrane, improve stability, and greatly extend the working period of the probe.

Explanation of Dissolved Oxygen Meter Testing Principle:

In industrial production or scientific research, if it is necessary to measure the concentration of dissolved oxygen in water or solution, the Clark method is often used. Due to its ability to directly convert the measured parameters into electrical signals, sensitive testing response, and ease of continuous online analysis, this method is widely used. Due to the different anode materials and electrolytes selected, the Clark method is further divided into electrochemical polarography and Gavin thin film current method.

The cathode for determining dissolved oxygen in water by polarography is a gold or platinum electrode, and the anode is a silver electrode (Ag/AgCl reference electrode). The electrolyte is KCl solution, and the DC power supply voltage is 0.65-0.85V. When the anode material is changed to lead and the electrolyte is changed to KOH solution, it is the Galvanic method. Compared with the polarographic method, the Gavin method has a faster oxidation reaction of anodic lead, resulting in faster test readings and no need for polarization. It is commonly used for general laboratory analysis and should be maintained frequently during use. The polarographic method requires polarization before use, but does not require frequent maintenance, making it particularly suitable for online analysis of continuous processes.

Orbisphere 3650Portable dissolved oxygen analyzerThe spare parts are as follows: