Working principle of ammonia nitrogen water quality online analyzer

2025-08-06

The working principle of the Ammonia nitrogen water quality online analyzer is mainly based on the chemical reaction between ammonia nitrogen and specific reagents, indirectly calculating the concentration of ammonia nitrogen by measuring the color change or potential value change of the reaction product. Here are several common working principles: 1、 Colorimetric method Colorimetric method is the most common detection principle, and its specific steps are as follows: Chemical reaction: In alkaline medium, ammonia nitrogen (in the form of free ammonia or ammonium ions) in water samples reacts with salicylates and hypochlorite ions to form blue compounds (salicylic acid spectrophotometric method), or reacts with Nessler's reagent to form yellow brown complexes (Nessler's reagent spectrophotometric method). Absorbance measurement: By measuring the absorbance at a specific wavelength (such as 697nm or 420nm), the concentration of ammonia nitrogen in water can be indirectly calculated. The absorbance is directly proportional to the ammonia nitrogen content, and the concentration of ammonia nitrogen can be calculated through a pre established calibration curve. 2、 Electrode method The electrode method uses a specific composite electrode to directly measure the ammonia nitrogen content in wa...

What are the maintenance points for digital pH sensors

2025-08-06

1. Regular cleaning Method: Dip a soft cloth or cotton swab in water or specialized cleaning agent, gently wipe the electrode part, and avoid scratching the electrode with hard objects. Attention: Clean the electrodes promptly after measurement to prevent measurement errors caused by the attachment of pollutants (such as algae and oil stains); After cleaning, dry it with filter paper to avoid cross contamination. 2. Calibration management Frequency: Based on the usage scenario, it is recommended to calibrate once a week to once a month; High precision demand scenarios (such as laboratories) require a shorter calibration cycle. Method: Use standard buffer solutions (such as pH 4.01, pH 7.00, pH 10.01) for two-point calibration to ensure sensor response speed and stability. Temperature compensation: before calibration, adjust the temperature compensation setting of the sensor to make it consistent with the temperature of the solution to be measured (the pH value of the standard buffer solution is different at different temperatures). 3. Storage and usage environment Storage: When not in use for a long time, soak the electrode in a 3mol/L KCl solution to avoid drying and electrode aging; The storage environment should be dry, ventilated, and kept away from high temperatures, high humidity, and ...

The core function of the Online Monitoring Instrument for Oil Fume Concentration

2025-08-06

1、 Core monitoring function Multi parameter real-time monitoring Oil fume concentration: Using the principle of laser scattering (such as particle aggregation light scattering method), the oil fume particles are irradiated with laser and the scattered light intensity is measured to establish a linear relationship between concentration and light intensity, achieving high-precision measurement (usually with an error of ≤± 10%). Particle concentration: Simultaneously monitor fine particulate matter such as PM2.5 and PM10 to assess the impact of air quality on health. Non methane total hydrocarbons (NMHC): Monitor volatile organic compounds (VOCs) emissions for scenarios such as grilling and frying to prevent photochemical smog pollution. Auxiliary parameters: Integrated sensors for temperature, humidity, flue gas pressure, flow rate, etc. provide environmental background data and assist in pollution tracing. Equipment status monitoring Real time monitoring of the operating status (start stop, power, faults, etc.) of the oil fume purifier and fan through current transformers or Hall sensors to ensure the normal operation of the purification equipment. 2、 Intelligent warning and alarm function Real time warning for exceeding standards When the concentration of oil fumes, particulate m...

Working principle of CEMS system

2025-08-06

The working principle of CEMS (Continuous Emission Monitoring System) is based on physical and chemical sensor technology, as well as data acquisition and transmission technology. Through sampling, preprocessing, analysis, data acquisition and transmission, it achieves continuous monitoring of flue gas emissions. The following is a detailed introduction to its working principle: 1、 Sampling and preprocessing Sampling: The CEMS system extracts flue gas samples from the flue through sampling probes. Sampling probes are usually equipped with ceramic or stainless steel filters to filter out dust in flue gas, preventing it from entering subsequent equipment and causing blockage and damage. Preprocessing: The extracted flue gas samples need to undergo pretreatment, including heating, transportation, filtration, and condensation steps. Heating and conveying are used to prevent condensation of water vapor in flue gas and avoid interference with subsequent analysis; Filtering is to further remove particulate matter from the flue gas; Condensation is used to lower the temperature of the flue gas for subsequent analysis. 2、 Gas analysis The preprocessed flue gas sample is sent to a gas analyzer for various component analyses, such as SO ₂, NOx, O ₂, etc. Gas analyzers use various technologies, including b...

Key points for selecting flow meters

2025-08-06

Measurement requirements: Select the appropriate type of flowmeter based on measurement accuracy requirements. Fluid characteristics: Consider the influence of fluid viscosity, density, temperature, pressure, and other characteristics on measurement results. For example, high viscosity fluids may not be suitable for using turbine flow meters or electromagnetic flow meters; Fluids containing solid particles may clog certain types of flow meters. Installation conditions: Select the appropriate type and installation method of flowmeter according to the installation environment. For example, in situations where non-contact measurement is required, ultrasonic flow meters can be chosen; In situations where space is limited, compact flow meters can be chosen. Economic factors: Considering the cost and maintenance expenses of the flowmeter while meeting measurement needs. The prices of different types and brands of flow meters vary greatly, and it is necessary to choose according to actual needs....

Technical characteristics of nuclear radiation monitoring equipment

2025-08-06

The nuclear radiation monitoring equipment presents significant characteristics in technology, such as high precision, high sensitivity, multi parameter monitoring, automated control, data storage and analysis, advanced sensor applications, and intelligence and networking. The specific analysis is as follows: 1. High precision and sensitivity: Nuclear radiation monitoring equipment can accurately measure the concentration and decay rate of radioactive substances, achieving precise monitoring of nuclear radiation. Its high sensitivity enables it to capture tiny radioactive material leaks and issue timely warnings. For example, advanced semiconductor detectors such as silicon detectors and germanium detectors can provide higher resolution at lower radiation intensities, enabling accurate measurement of low-dose radiation. 2. Multi parameter monitoring: Nuclear radiation monitoring equipment can simultaneously monitor multiple parameters, such as radiation dose, radiation type, radiation intensity, etc., in order to have a more comprehensive understanding of the occurrence of nuclear radiation. This multi parameter monitoring capability helps improve the accuracy and reliability of monitoring. 3. Automated control: Nuclear radiation monitoring equipment has the characteristics of automated control, ...

The core advantages of infrared gas leak detector

2025-08-06

The core advantages of infrared gas leak detectors are reflected in five aspects: non-contact remote detection, high-sensitivity visual positioning, efficient safety inspection, anti-interference adaptation to complex working conditions, quantitative leakage and preventive maintenance. The specific analysis is as follows: 1、Non contact and long-distance detection capability Infrared gas leak detectors can detect leaks from tens to hundreds of meters away, without the need to be close to high-pressure, high-temperature, or toxic gas areas (such as high-altitude pipelines and chemical plant reactors). For example, the Hanwei R10 handheld detector can detect distances up to 20 meters, and the T-800 airborne system can achieve large-scale rapid screening through unmanned aerial vehicles, avoiding direct contact with hazardous environments and significantly improving safety. 2、High sensitivity and visual positioning The device can detect trace leaks at PPB level (one billionth) or PPM level (one millionth), and visually display the gas plume morphology and diffusion direction through thermal imaging. For example, the LUFT300 VOC gas infrared leak detector uses a type II superlattice cooling detector, which can locate small VOC leakage points in real time; The Fujirui infrared leak detector uses a 320...

【Elite dialogue】Visiting and exchanging ideas between teachers and students from the leading class of environmental industry at Tianjin University

2025-08-08

On April 21st, alumni of Tianjin University's Environmental Industry Leading Class visited Jiangsu Lanchuang Intelligent Technology Co., Ltd. (hereinafter referred to as "Lanchuang Intelligent") under the leadership of Professor Li Ling, and conducted discussions and exchanges. Huang Hongjuan, Chairman of Lanchuang Intelligent, Zhao Zhenyu, Assistant Chairman, Ding Jiajing, Marketing Director of East China Operations Center, and Zhu Ling, Regional Sales Manager, warmly welcomed the visiting teachers and students. Elite dialogue Chairman Huang Hongjuan warmly welcomed the arrival of the leading class of environmental industry teachers and students from Tianjin University. She led everyone to visit the Blue Creation Intelligent Exhibition Hall, production workshop and other places, introducing the development process, service mode and future industrial planning of Blue Creation Intelligent. Collaborative development The alumni of the Tian Da Environmental Industry Leading Class this time are all leaders in the environmental governance industry. During the discussion, everyone exchanged and discussed the construction of environmental governance platforms, environmental governance needs, and other aspects. Through communica...