Water Quality Meter IP68 by Boqu Instrument

Accurate, Portable, Easy-to-Use COD sensor

Measuring Principle Of Our Cod Sensor:The BOQU Digital Online COD Sensor is based on the absorption of ultraviolet light by organic matter, and uses the 254 nm spectral absorption coefficient SAC254 to reflect the important measurement parameters of soluble organic matter content in water, and can be converted into COD value under certain conditions. Our cod sensor allows for continuous monitoring without the need for any reagents.

Application Of Cod Probe:1)Continuous monitoring of organic matter load in the sewage treatment process2)0n-line real-time monitoring of  influent and outflow water of the wastewater treatment3)Application:surface water, industrial discharge water, and fishery discharge water etc

Accurate Online Nitrate Nitrogen Measurement

• The theory used in the BOQU Digital Online COD Sensor is based on UV-Vis spectrophotometry, specifically using the 254 nm spectral absorption coefficient (SAC254). Here’s how it works:

  1. UV Absorption of Organic Matter

  At a wavelength of 254 nm, many organic compounds, particularly those containing aromatic structures (like proteins and some organic acids), absorb ultraviolet light. This absorption is related to the concentration of organic matter in the water.

  2. Spectral Absorption Coefficient (SAC254)

  The SAC254 represents how much UV light at 254 nm is absorbed by the water sample. It is a key indicator of the presence of dissolved organic matter (DOM). The more organic matter in the water, the higher the absorbance at this wavelength.

  3. Conversion to COD Values

  Since COD is a measure of the oxygen demand needed to oxidize organic materials, under certain conditions, the SAC254 value can be empirically correlated to the COD value. This correlation is based on the fact that the amount of organic matter that absorbs UV light is proportional to the amount of oxygen required to oxidize it.

  • No Reagents: Unlike traditional COD methods, this technique doesn’t require chemical reagents (like potassium dichromate). Instead, it relies on the direct absorption of UV light, allowing continuous, reagent-free monitoring.

  • Real-Time Monitoring: Since the sensor continuously measures UV absorption, it can provide real-time data on water quality without interruptions for manual sampling or chemical processing.

  Key Advantages of This Theory:

  • Continuous Monitoring: Allows for real-time, uninterrupted monitoring.
  • No Chemical Waste: Since no reagents are used, there's no chemical waste.
  • Rapid Response: The method provides immediate feedback, which is critical for process control in industries or environmental monitoring.

  This makes the UV absorption method at 254 nm a highly effective and efficient approach for estimating COD values, particularly for soluble organic matter in water.

Material Introduction

Online nitrate nitrogen sensor is constructed using high-quality and durable materials to ensure long-lasting and reliable performance. The product features a sleek and sturdy design, with a sensor input connector and data storage capabilities for calibration and measurement data. With its durable construction and precision engineering, Conductivity SENSOR is an essential tool for continuous monitoring of ph levels in various industries, such as environmental protection, pharmaceutical, foodstuff, running water, and many more. Boqu Instrument Co., Ltd., a leading manufacturer, is dedicated to using advanced technologies to solve environmental problems, ensuring high-quality and reliable performance for its products.