The ion selection electrode method was used to measure the ammonia nitrogen concentration. The ammonia nitrogen ion selection electrode directly detected the ammonium root ions in the water environment to determine the concentration of ammonia nitrogen. The pH electrode was used as the reference electrode to obtain better stability. Because the measurement results of the sensor are easily interfered with by potassium ions, potassium ion compensation is required when the concentration of potassium ions in the water is high.

The ion selection electrode method is used to measure the ammonia nitrogen concentration. The ammonia nitrogen ion selection electrode directly detects the ammonium root ions in the water environment to determine the concentration of ammonia nitrogen. The pH electrode is used as the reference electrode to obtain better stability. The ammonia nitrogen sensor consists of ammonium ion selection electrode, pH electrode and temperature electrode to form an integrated sensor, which can correct and compensate for the measured value of ammonia nitrogen with each other, and realize multi-parameter measurement at the same time.

PISE-900 sensor can flexibly select one or two ion selective electrodes, and the default standard pH and temperature electrodes can monitor 4 parameters simultaneously. The optional parameters of ion selective electrode include ammonia nitrogen (NH4N), nitrate nitrogen (NO 3 N), potassium ion (K+), chloride (CL-) and fluoride (F-). Different parameter combinations can also achieve mutual compensation, making the measurement data more accurate.

Model:PPH-500 | PPH-500E | POP-500 | POP-500E Measuring Range: 0-14pH | 0-14pH | ±2000mV | ±2000mv

PPH-500F series industrial pH models can be matched with different types according to different application scenarios, including: sewage, conventional models used in conventional industrial scenarios, salt-free bridge models for dirty and messy environments, and tetrafluorosalt bridges with ion traps for high salt, high heavy metal ions, and high ammonia ion scenarios; at the same time, according to different water quality conditions, different sensitive membranes can also be matched, including high temperature type, low temperature type, acid and alkali resistant type, hydrofluoric acid resistant type, low impedance type, etc.

Model:PEC-500 | PEC-500E | PEC-500F Measuring Range: 10-5000us/cm(k=1.0) | K=0.01：0.055-20μs/cmK=0.1：0.5-200μs/cmK=1.0：1.0-2000us/cm | K=0.01：0.05-20μs/cmK=0.05：0.05-100μs/cmK=0.1：0.1-200us/cm

Model:PPH-500B | POP-500B | PEC-500B Measurement Parameters: pH, Temperature | ORP | Conductivity, Temperature

Probest TOC online automatic water quality monitor strictly follows the national standard of "Determination of Water Quality, Total Organic Carbon, Combustion Oxidation-Non-Dispersive Infrared Absorption Method" (HJ 501-2009). The product integrates high-precision detection, automated operation and intelligent management, which can effectively meet the monitoring needs of the whole chain from pollution source supervision to process control, and is a reliable choice to promote water environment management towards digitalization and refinement.

Chromate method. Under certain conditions, add potassium dichromate and sulfuric acid mixture to react in the digestion tank, so that organic reductants in the water sample are oxidized, Cr6 + is reduced to Cr3 + in the reaction, causing the color change of the mixed solution. Detect the color change of the mixed sample by photoelectric colorimeter, and finally convert it into the oxygen content required for redox reaction, that is, the chemical oxygen demand of the tested water sample.

Salicylic acid optical colorimetry. The sample and the developer are fully mixed under the action of air and a chemical reaction occurs, and the concentration value of ammonia nitrogen is finally calculated according to the color change of the developer.

Ammonium molybdate spectrophotometry. The aqueous sample is digested with potassium persulfate, and all the phosphorus contained in it is converted into orthophosphate. In an acidic medium, orthophosphate forms a colored complex with a developer and reducing agent. Its absorbance is measured at a specific wavelength, which is proportional to the concentration of total phosphorus.

Alkaline potassium persulfate digestion ultraviolet spectrophotometry. In the presence of potassium persulfate, the nitrogenous compounds in the water sample are oxidized into nitrate ions after full oxidation and digestion, and then the absorbance measured by ultraviolet spectrophotometry is used to calculate the total nitrogen content.

Acid potassium permanganate oxidation titration method. Potassium permanganate oxidizes the organic pollutants in the sample, and then adds the measured sodium oxalate solution to reduce the remaining potassium permanganate, and then uses potassium permanganate solution to drop back the excess sodium oxalate, judges the titration endpoint by the change of photometrology, and finally the instrument automatically calculates the permanganate index value.

Dichromate method. Under certain conditions, the mixture of potassium dichromate and sulfuric acid is added and reacted in the digestion tank to oxidize the organic reducing substances in the water sample, and Cr6+ is reduced to Cr3+ in the reaction, causing the color change of the mixture. The change in the color of the mixed sample is detected by a photocolorimeter, and finally converted into the content of oxygen required for the redox reaction, which is the chemical oxygen demand of the measured water sample.

Salicylic acid optical colorimetry. The sample and the developer are fully mixed under the action of air and a chemical reaction occurs, and the concentration value of ammonia nitrogen is finally calculated according to the color change of the developer.

Ammonium molybdate spectrophotometry. The aqueous sample is digested with potassium persulfate, and all the phosphorus contained in it is converted into orthophosphate. In an acidic medium, orthophosphate forms a colored complex with a developer and reducing agent. Its absorbance is measured at a specific wavelength, which is proportional to the concentration of total phosphorus.

PWQ-1000 pipe network water quality monitoring system is a product with small size, light weight and convenient field installation developed for online monitoring of drinking water quality. This product integrates water quality analysis sensor, data acquisition and processing unit, internal water flow pipeline unit, and can continuously measure temperature, pH, turbidity and disinfectant index parameters. The system can be externally extended to access any brand of standard MODBUS RS485 output meters, such as flow, pressure, chromaticity and other parameters.

PWQ-2000 pipe network water quality monitoring system is a system integrating pipe network water quality monitoring sensors, data processing units, and internal water flow pipeline units. It can continuously measure temperature, pH, turbidity, disinfectant indicators, and expand water quality parameters such as conductance and ORP.

PWQ-3000 multi-parameter water quality monitoring system is a comprehensive online monitoring system composed of modern automatic control technology, special analysis software and communication network with reagent water quality sensor and wireless data transmission system as the core. The system is mainly composed of a monitoring cabinet, a water quality online monitoring sensor unit, a data acquisition and transmission unit, a control unit, a pipeline integration unit, a power supply unit (optional solar power supply system) and a water collection unit.

PWM4000 integrated water quality nitrogen and phosphorus monitoring system is designed for sewage treatment processes, enabling real-time monitoring of key water quality parameters such as orthophosphate, nitrate nitrogen, and ammonia nitrogen. The system adopts a highly integrated design, with fast and accurate measurements, meeting the process needs of aeration control, biological treatment, and chemical phosphorus removal in sewage treatment. By providing real-time data, it helps optimize treatment processes, improve sewage treatment efficiency, reduce operating costs, and ensure effluent quality meets standards. It is suitable for sewage treatment plants, industrial wastewater treatment, and environmental monitoring, and is an important tool for achieving precise water quality control.

PMA5000 outdoor small water quality automatic monitoring system consists of water collection unit, pretreatment and distribution unit, control unit, analysis unit, data acquisition and transmission unit, auxiliary unit, etc.

PMA8000 outdoor small water quality automatic monitoring system consists of water collection unit, pretreatment and distribution unit, control unit, analysis unit, data acquisition and transmission unit, auxiliary unit, etc.

The standard station solution for automatic monitoring of surface water quality is a comprehensive monitoring system that integrates modern sensing technology, automatic control technology, data acquisition and transmission technology, and Internet of Things technology. It aims to realize continuous, real-time, and automated monitoring and monitoring of key water quality parameters of surface water bodies such as rivers, lakes, and reservoirs. The solution strictly follows relevant national technical specifications (such as the National Technical Specification for Automatic Surface Water Monitoring), builds standardized monitoring stations, and provides scientific, accurate and timely water quality information and changing trends for environmental management departments.

MUC-200 multi-parameter transmitter can be equipped with optional sensors to monitor multiple different parameters at the same time, including temperature/pH/ORP/conductivity/dissolved oxygen/turbidity/sludge concentration/chlorophyll/blue-green algae/UVCOD/UVNO3/ionic ammonia nitrogen/transparency/residual chlorine and other parameters. The transmitter software interface parameter display is adaptive, the operation interface menu is simple to set, and the user is convenient to operate; the sensor is plug-and-play; the electrode installation and replacement are quick and convenient; a variety of data transmission methods are optional, and it has data storage and export functions.

PB-030-AY mini water quality monitoring buoy is a mini buoy specially designed for the aquaculture industry. It can monitor water quality in various modes such as all-weather, continuous and fixed-point, and transmit data to the server in real time. Users can query, store, export and other functions of data through the platform software.

MUC-200 multi-parameter transmitter can realize simultaneous online monitoring of multiple different parameters through optional sensors, including temperature/pH/ORP/conductivity/dissolved oxygen/turbidity/sludge concentration/chlorophyll/blue-green algae/UVCOD/UVNO3/ionic ammonia nitrogen/transparency/residual chlorine and other parameters. It is widely used in water quality monitoring in sewage plants, waterworks, water stations, surface water, industry and other fields.

UNI-20 transmitter has strong universality, and existing digital sensors and analog sensors of Probes Company can be freely connected with it. Measurable parameters include pH, DO, ORP, conductivity, turbidity, SS, chlorophyll, blue-green algae, residual chlorine, UVCOD, ammonia-nitrogen, nitrate-nitrogen, transparency and other parameters. At the same time, UNI-20 can also choose single channel or dual channel configuration according to requirements. A transmitter can connect up to two sensors at the same time, reducing the cost and installation space of the transmitter.

UNI-30 universal transmitter measures parameters including pH, DO, ORP, conductivity, turbidity, SS, UVCOD, UVNO3, chlorophyll, blue-green algae, ammonia nitrogen, residual chlorine, transparency, chromaticity and other parameters, and realizes plug-and-play sensor use. The transmitter adopts a 3.5-inch color LCD screen, with simple menu settings on the operation interface, convenient operation for users, and functions such as data storage, historical data viewing and export.

CL-201 is an accurate, cost-effective and low-maintenance instrument for measuring residual chlorine/total residual chlorine/reactive oxygen species in the disinfection process and monitoring of residual chlorine/total residual chlorine concentration in drinking water pipe networks using DPD colorimetric method.

The PDCL-400 residual chlorine/chlorine dioxide sensor adopts the advanced constant voltage principle to measure residual chlorine/chlorine dioxide in water. This method uses a stable potential potential applied between the polarized electrode and the reference electrode, and different components under this potential generate different current intensities. The meter calculates the concentration of the measured component through the acquisition and analysis of the current signal.

PDCL-500M residual chlorine/chlorine dioxide online analyzer uses photopolymer membrane and silicon crystal semiconductor as conduction elements, built-in chlorine and temperature probe, and injects and packages microelectronic components through MEMS technology. As the concentration of free chlorine or chlorine dioxide in the water sample changes, the sensor generates different current intensities, which are processed by voltage regulators and signal amplifiers, and converted into standard MODBUS RS485 signals.

PDCL-600 membrane residual chlorine/total residual chlorine/chlorine dioxide electrode is a composite digital electrode using membrane ampere method, the detection part adopts special permeable membrane technology, which has the characteristics of anti-chemical (mainly surfactant) interference, reducing pH dependence, etc., the sensor is not limited by water quality conditions, and can be used in tap water, swimming pools, medical wastewater, sewage treatment, industrial wastewater and other environments, the sensor has fast response speed, stable working performance, low cost and low maintenance, providing users with reliable and accurate data.

PDCL-700 membrane residual chlorine is independently developed based on the technical route of laminated three-electrode method and combined with domestic water quality conditions. The electrode adopts optimized membrane process and sensing structure, and has good anti-surfactant interference ability. It has low pH dependence and is suitable for a variety of water environments, including tap water, agricultural drinking water, secondary water supply and other fields. The sensor responds quickly and the data output is stable, which not only ensures the accuracy and reliability of measurement, but also is more economical and convenient to maintain, which can meet the needs of continuous and accurate monitoring in different scenarios.

The PMI800 portable analyzer, when used with Probes 'own portable electrodes, can measure a variety of parameters such as pH, ORP, conductivity (salinity &TDS conversion), dissolved oxygen, turbidity, suspended matter, chlorophyll, blue-green algae, etc. It can automatically identify the electrode type connected; support single channel and dual channel configurations. It has the advantages of comfortable operation, convenient test and wide application.

PM3008 is a multi-wavelength portable colorimeter, factory preset with multiple measurement curves, to meet the measurement applications of CODcr, ammonia nitrogen, total phosphorus, total nitrogen, residual chlorine, chlorine dioxide, total chlorine, total chlorine, etc., and users can also expand the measurement of other parameters through self-built curves.

The PGZ-800 portable nephelometer works by emitting a beam of light into the sample, and then its built-in detector measures the intensity of the scattered light in the sample due to turbidity, which is at a 90° angle to the incident light. Since the scattered light intensity is directly proportional to the turbidity concentration in the water sample, the turbidity content in the sample can be measured more accurately.

PLM-800 waterproof multi-parameter measurement and control terminal is a micro-power, multi-functional, and system solution suitable for measurement and control in manhole environment that integrates data acquisition, data communication and monitoring. It adopts an integrated modular design that effectively integrates RTU wireless transmission terminal and disposable lithium sub-battery. It can optionally have built-in radar level, and can support pH, conductivity, dissolved oxygen, ammonia nitrogen, COD, turbidity, SS, liquid level, flow, and up to 6 MODBUS485 sensors to meet the needs of water quality and water level monitoring in manholes and other complex situations.

PADV-60 ultrasonic Doppler flowmeter is a flow meter made by using the Doppler effect principle. The measurement point is in front of the probe, which does not damage the flow field, and has the advantages of high measurement accuracy, wide range, and fast response speed. The internal integration of pressure sensor and temperature sensor integrates the measurement of flow rate, liquid level, temperature and flow. It is suitable for flow rate and flow measurement of open channels, rivers, drainage pipe networks and various full and non-full pipes.

The low-power data acquisition terminal (RTU) adopts a low-power design, and its dormant power consumption is less than 50uA@DC12V, which is especially suitable for cases that require battery power or solar power, which can greatly reduce the capacity of the battery and save costs. The data transmission mode is GPRS, 4G full Netcom, and NB-10T, which are suitable for collecting various instrument output signals and realizing remote transmission.

PRM-102 radar liquid level meter adopts 24GHz radar pulse, pulse propagates in space at light speed, after encountering the surface of the measured medium, part of its energy is reflected back. The time interval between transmitting pulse and receiving pulse is proportional to the distance from receiving pulse antenna to the surface of the measured medium. This radar level gauge has the advantages of small measurement blind zone, almost unaffected by corrosion, foam, and interference from changes in water vapor, temperature and pressure in the atmosphere.

The working principle of ultrasonic level gauge is that the transducer (probe) emits a high-frequency ultrasonic pulse that is reflected back when it encounters the surface of the measured medium, and is partially received by a transducer and converted into an electrical signal. The ultrasonic pulse propagates at the speed of sound waves, and the time interval from transmission to reception of the ultrasonic pulse is directly proportional to the distance on the surface of the transducer.

The electromagnetic flowmeter works based on Faraday's law of electromagnetic induction and is used to measure the volumetric flow rate of conductive liquids. The EFM30 electromagnetic converter core adopts a high-speed central processing unit, which has a very fast calculation speed. The sensor adopts non-uniform magnetic field technology and special magnetic circuit structure, which has a stable and reliable magnetic field and reliable measurement performance.

The ultrasonic flowmeter/ultrasonic calorimeter uses the principle of low voltage and multi-pulse time difference, and adopts the high-precision and ultra-stable double-balanced signal differential transmission and differential reception patented digital detection technology to measure the transmission time of sound waves in the downstream and counterflow directions, and calculates the flow rate according to the time difference. It has the characteristics of good stability, small zero drift, high measurement accuracy, wide range ratio, and strong anti-interference.

The Pt series diffusion silicon pressure transmitter is a new generation of pressure transmitter produced by using imported chips, after careful structural design, signal processing and assembly, and testing in accordance with national standards and enterprise standards. The basic principle is to use the piezoresistive effect and micromachining technology of semiconductors, use lithography, diffusion and other semiconductor processes to make a Wheatstone bridge, form a sensitive diaphragm, when under the action of external force, produce microstrain, resistivity changes, so that the resistance of the bridge arm changes (one pair becomes bigger and one pair becomes smaller) and then excites the voltage signal output, through computer temperature compensation, laser resistance regulation, signal amplification and other processing methods and strict assembly testing, calibration and other processes, to produce a pressure transmitter with standard output signal.

PT10M immersive level transmitter selects imported high-precision and high-stability diffusion silicon pressure-sensitive chips, and converts the liquid level signal of the measured liquid into a 4-20mA DC standard signal through a high-reliability amplification circuit. High-quality sensors, exquisite packaging technology, and perfect assembly processes ensure the excellent quality and performance of this product. This product is divided into two structures: integrated and split. The product can resist the erosion of a variety of corrosive liquids and can meet the needs of customers to the greatest extent.