Water Quality Analysis

At Sanwa Technologies, we pride ourselves on being at the forefront of advanced manufacturing solutions.

LFS-2002

Water quality analyzer based on spectrophotometry

With the modular design, LFS-2002 water quality analyzer based on ultraviolet-visible spectrophotometry is able to change monitoring parameter as required. Easy to operate, it can test many parameters at the same time. The instrument has been widely applied to monitor water body such as surface water, underground water, sea water, potable water source, pollution source, industrial wastewater and domestic wastewater.

Accurately measure the water sample after pretreatment and pour it into reaction detection unit, add specific chemical reagent such as oxidant, reducing agent, buffer solution, masking agent and color developing agent based on parameter test requirement, conduct condition control (such as temperature, pressure pH, illumination, etc.) over reaction system, conduct absorbance detection after the color development system is very stable, and then calculate the concentration of relevant parameter from the working curve of absorbance A.

Complete quality control measure to ensure reliability of monitoring result
It can give an alarm in case of reagent shortage, abnormal information or instrument failure and store and upload the alarm information to center management platform;
It can record process log including instrument state and instrument process and store and upload the record to center management platform;
The dual-line sample injection is adopted to make available quality control and assurance measures including parallel sample test, standard sample check (including zero check and span check) and spiked recovery determination.
Easy and safe to use and maintain
Periodically automatic cleaning and automatic calibration function;
Automatic switching function of measuring range to adapt to the concentration change of water sample;
Insulation resistance not lower than 20M Ohm between power lead and shell.
Data transmission meets the national
The instrument can meet the remote reverse control function and realize two-way data transmission and working condition output;
The instrument communication protocol can meet HJ/T 212 requirement and the monitoring data output adopts
0-SV, 4~20mA or RS485/232.

LFEC-2006

Water quality analyzer based on ion selective electrode method

LFEC-2006 water quality analyzer based on ion selective electrode method can monitor ammonia nitrogen, fluoride, chloride and other parameters, which has been widely applied to the monitoring on water body such as surface water, underground water, sea water, potable water source, pollution source, industrial wastewater and domestic wastewater. The water sample is taken and added to the detection tank, then the regulating solution is added and mixed well. The system measures the potential difference between the working electrode and the reference electrode (the potential difference will vary with the activity of the tested ion in solution (conforming to Nernst equation), and calculates the concentration of the tested substance in the water sample according to the standard curve.

Stable performance, high testing accuracy The electrode is of imported customized development, featured by strong selectivity and high sensitivity; The dynamic curve method is adopted to ensure the reliability of testing result.
Good quality control measure to ensure reliability of monitoring result It can give an alarm in case of reagent shortage, abnormal information or instrument failure and store and upload the alarm information to center management platform; It can record process log including instrument state and instrument process and store and upload the record to center management platform; The dual-line sample injection is adopted to make available quality control and assurance measures including parallel sample test, standard sample check and determination of spike-and-recovery rate.
Easy and safe to use and maintain Periodically automatic cleaning and automatic calibration function; Automatic switching function of measuring range to adapt to the concentration change of water sample; Insulation resistance not lower than 20MS between power lead and shell.
Data transmission meets national standard The instrument can meet the remote reverse control function and realize two-way data transmission and working condition output; The instrument communication protocol can meet HJ/T 212 requirement and the monitoring data output adopts 0~5V, 4~20mA or RS485/232.

LFEC-2006

Water quality analyzer based on anodic stripping voltammetry

LFEC-2006 water quality analyzer based on anodic stripping voltammetry can monitor the heavy metal including cadmium, lead, copper, zinc, mercury, arsenic and antimony and other parameters, which has been widely applied to the monitoring on water body such as surface water, underground water, sea water, potable water source, pollution source, industrial wastewater and domestic wastewater. Gather the tested heavy metal ions through their electrolysis on working electrode, then start scanning from negative potential to positive potential to enable that the substance gathered on electrode can dissolve out, record iis anodic peak, conduct qualitative analysis based on dissolution potential and determine the content of the tested substance based on peak current.

LFWGC-2012

Water quality analyzer based on gas chromatography

LFWGC-2012 water quality analyzer based on gas chromatography adopts the purge-and-trap, solid phase microextraction (SPME) and other pretreatments and is provided with multiple detectors including ECD, FID and FPD for automatic qualitative and quantitative analysis of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs). Its linear range is wide and its detection limit can meet water quality standard requirement.

VOCs test principle: Continuously blow VOCs out of water sample with purge gas (nitrogen or helium, carry the VOCs into trap with carrier gas, utilize the adsorbing material in the trap to complete absorption and purging, blow dry the trap, and rapidly increase the trap temperature to enable that the VOCs in the trap can dissolve out through thermal decomposition and enter the gas chromatograph detection unit with carrier gas for analysis and detection.

SVOCs test principles: Conduct the continuous extraction of SVOCs in water sample by means of solid phase microextraction and make it absorb on extract. After completion of extraction, drain water from the extract, blow dry the extract, and rapidly increase the extract temperature to enable that the SVOCs in the extract can dissolve out through thermal decomposition and enter the gas chromatograph detection unit with carrier gas for analysis and detection.

Highly parameter extensibility and low maintenance
It has the remote reverse control function and can realize two-way data transmission and working condition output;
The instrument process parameter such as temperature rise period and thermal decomposition and analysis time can be easily set as required;
The detection unit adopts modular design. It is compatible with various general detectors, and can select different detectors according to the property and sensitivity of the component to be tested, and can ensure the detection limit of instrument.
Multiple monitoring parameters, rapid analysis speed and high reliability
The qualitative components in one sampling can exceed 20 types;
The instrument is equipped with automatic calibration module to ensure the accuracy of test result.
High sensitivity and good repeatability
The special purge pipe is designed to distribute purge gas evenly and increase the contact area between purge gas and sample so as to improve the purging efficiency of instrument;
The gas circuit is controlled by the combination of pressure maintaining valve and stable-flow valve to ensure the stability of purge gas, carrier gas and make-up gas to the maximum extent.
Good quality control means
It can automatically give an alarm in case of abnormal chromatographic peak;
It can give an alarm in case of reagent shortage, abnormal information or instrument failure;
It can record column temperature, heating time, instrument parameter, instrument process, etc.;
It adopts the double pipeline sampling and has quality control measures including automatic check and automatic calibration of standard sample.

LFAF-2016

Water quality analyzer based on atomic fluorescence spectrometry

With its specific aerodynamic reaction, the instrument first reduces the tested element in sample solution into volatile covalent gaseous hydride (or atomic steam) with potassium borohydride or sodium borohydride and then introduces it into atomizer by means of carrier gas for atomization in argon- hydrogen flame and formation of ground state atom. After absorbing the energy of light source, the ground state atom will change to excited state. The excited state atom will release its absorbed energy in form of fluorescence during deactivation. The intensity of the fluorescence signal keeps a linear relation with the content of the tested element in sample. Therefore, the content of tested element in sample can be determined by measuring fluorescence intensity. The method is featured by high sensitivity, low detection limit, broad linear range and strong anti-interference ability and can be used for detection of more than ten heavy metal elements.

Simultaneous detection and simultaneous result output of multiple channels; With the specific coded hollow cathode lamp, the instrument can automatically identify element and monitor the service life of the hollow cathode lamp;
The shielded quartz furnace low-temperature atomizer is adopted to reduce fluorescence quenching and vapour phase interference and improve atomization efficiency;
The instrument is provided with start-up diagnostics, automatic diagnosis and automatic fault alarm functions;
The high-precision digital pressure monitoring system can automatically and accurately control gas flow; the new gas saving device is adopted to effectively save the consumption of argon.

LFIC-2012

water quality analyzer based on ion chromatography

LFIC-2012 water quality analyzer based on ion chromatography can monitor routine cation and anion, metal ion, heavy metal ion and other parameters. With the efficient separation technology, sensitive detection technology and good selectivity, it is an ion chromatography available for on-line monitoring. Ion chromatography is an ion exchange chromatography, which is one kind of high performance liquid chromatography. It is a method to determine the ionized state substance with positive or negative charge ionized in water solution by means of chromatographic separation. It is an ion chromatography available for on-line monitoring, combining the on-line monitoring mean and the ion chromatography.

There are two operating modes for option: surface water and pollution source;
It has multiple working modes including manual mode, continuous mode and periodic mode, and it can set monitoring frequency as required;
It can give an alarm in case of reagent shortage, abnormal information or instrument failure and store and upload the alarm information to center management platform;
It can record process log including instrument state and instrument process and store and upload the record to center management platform;
It adopts double pipeline sampling, with quality control and assurance measures such as parallel sample testing, specimen verification and spiked recovery determination.
The program of working process can be modified which is easy to learn and operate.
It has periodically automatic cleaning and automatic calibration functions;
It can automatically clean and reset after power up in case of accidental power failure;
Its insulation resistance between power lead and shell is not lower than 20MS;
The instrument supply voltage is required to be AC (220+22)V, (500.5)Hz;
The instrument can meet the remote reverse control function and realize two-way data transmission and working condition output;
The instrument communication protocol meets the requirement of HJ/T 212.

LFTOX-2010

water quality analyzer based on luminescent bacteria method

According to ISO11348 and GB/15441, the instrument adopts vibrio fischeri, vibrio qinghaiensis or photobacterium phosphoreum as tested object to obtain the integrated toxicity data of water based on strain response to water body. The product includes two monitoring modes, portable and online, and can be used with conventional physical and chemical instruments. In case of water pollution, it can judge the pollution level of water body comprehensively, accurately and rapidly. LFTOX-2010 water quality analyzer is an integrated toxicity monitoring system of water based on biosensing technology, and its detection is based on the luminous intensity change of luminous bacteria in metabolism. The luminous bacteria is a nonpathogenic bacteria which has luminous power and fixed luminous intensity under normal condition. When the luminous bacteria is in the toxic water environment, their luminous power will be restricted. Based on the intensity change of luminous bacteria, it is allowed to rapidly and accurately determine the integrated toxicity of water.

Screening of excellent strains with stable luminescence and high luminescence intensity;
High sensitivity and fast response of the strain, responding to more than 5000 kinds of organic and inorganic poisons such as heavy metals and pesticides;
Advanced lyophilization technology and frozen strain activity recovery technology and other preparation processes to ensure the activity of the strain after recovery;
The strain can be used directly after activation without pre-culture;
The strains can be stored for 6 months below -20°C and have a shelf life of 7-10 days after resuscitation.

LFBOD5-2015 BOD

Water quality analyzer

The water quality analyzer is applicable to the surface water of pH 6~8, domestic wastewater unpolluted by industrial wastewater, and effluent from sewage treatment plant but not applicable to industrial wastewater, water containing abundant disinfectant, and strongly acidic or alkaline water (the microorganism for treatment of industrial wastewater can be used for specific wastewater treatment only after long-term habituated culture and this is specific and needs long-term artificial preparation). The BODs means the dissolved oxygen consumed by some oxidizable substances in water due to microbial decomposition after water sample is cultured for 5 days at 201°C, especially in the biochemical process of organic substance. Measurement principle of BOD, by differential-pressure method: store a volume of water sample in closed container and retain a given volume of air above the water sample in bottle. During the aerobic biochemical reaction of microorganism in cultivation process, the microorganism will consume the dissolved oxygen in water sample and release CO, and the oxygen contained in the air in bottle will continuously supplement to reach a new balance. There is CO, adsorbent in upper part of the bottle to absorb the released CO. Therefore, a negative pressure is formed in the closed system. The pressure difference is caused by oxygen and directly proportional to the volume of the consumed oxygen, so BOD, can be obtained by measuring the pressure change in closed system.

The measurement of BOD in water by means of mercury-free differential pressure sensing method (breathing method) is safe and reliable, avoiding the occurrence of mercurial poisoning;
It is available for measurement of 14 samples and has long maintenance period reduce maintenance amount;
It can directly indicate BOD, concentration, without conversion;
Constant-temperature cultivation to ensure sufficient and uniform reaction and accurate data; It is allowed to check the data of current and historical tests;
The data recording frequency can be set for convenience of checking graph change;
It can automatically analyze and draw the determination data curve of water sample;
7" color LCD, touch operation, convenient and efficient; With the microprocessor control system, the instrument can automatically complete measurement process in
Absence of specific person and shut down automatically after completion of the measurement; The storage space is large enough to store 20 years of historical data; the external sd card is also available;
The instrument data can be conveniently, efficiently and directly transmitted to computer via USB/infrared interface;
There is convenient and efficient us software upgrading plan, which can obtain more functions without affecting tested data.

LFFColi-2016

Fecal coliform water quality analyzer

The instrument adopts the microbiological detection technology of enzyme substrate for on-line hygienic index detection of water, which can quickly detect fecal coliform in water to meet the actual requirement of environmental protection department and pollution discharge enterprise. It is applicable to drinking water, source water, surface water, underground water, tap water, medical water, etc. Adopt the photoelectric detection technology of immobilized enzyme substrate, inoculate the diluted coliform sample into chromogenic media at a certain culture temperature, and test the different concentration of optical density within different time. In the meantime, inoculate the same coliform sample into MPN tube to determine the number of the coliform of different dilutions and calculate the characteristic time. Based on the linear relation between the logarithm of the obtained number of coliforms and the characteristic time, obtain the linear equation, inoculate the unknown concentration of sample into chromogenic media, and calculate the characteristic time as above, and find out the number of fecal coliforms on standard curve based on time.

Optional measuring modes including off-line manual, off-line automatic and on-line automatic;
Available alarm functions in case of temperature, instrument failure, reagent shortage, etc.;
Multiple independent constant-temperature culture and detection systems to ensure sampling at relatively high frequency;
Built-in turbidity correction function;
Automatic pipeline disinfection and cleaning function to ensure that the sampling pipeline is sterile as possible and the measured result is more accurate and reliable;
It is simply operated for unattended on-line continuous monitoring and remote uploading of test result;
It can use the portable calibration module (according to national standard method) for field correction based on the characteristics of actual water sample.

LFDCS-B2016

Portable Algae Analyzer

LFWCS-2008 water quality analyzer can monitor pH, dissolved oxygen, turbidity, temperature, suspended solid, conductivity, ORP, Chlorophyll a, algal density and other parameters. With automatic calibration, automatic temperature compensation and automatic probe cleaning functions, the instrument has been widely applied to the monitoring of water body including surface water, underground water, sea water, drinking water source, pollution source, industrial wastewater, domestic wastewater, etc. Based on the differences in fluorescent spectra of different types of algae, excitation light sources at 470 mm, 525 nm, and 610 nm are used. By detecting the algal fluorescence signal at 680 mm, online measurements of chlorophyll-a concentration and cell density of blue-green algae, green algae, and diatoms can be achieved.

Large-capacity UPS;
Low-power embedded system, large-capacity memory;
Multiple water taking modes (pontoon, buoy, trestle, stratified intake, etc.);
Adopt the pretreatment technology including tertiary sedimentation, ultrasonic wave homogenization or laminated filtration based on site water sample;
The control part adopts PLC which can be programmed flexibly based on site condition to realize the control over water intake, water distribution and pretreatment units;
The liquid waste treatment system can be provided to cancel the manual collection, transfer and treatment of liquid water;
The system is provided with 6 circuits of R$232/485 which can be extensible at the same time and use system software to collect data, fault, state information of instrument;
The system is open to integrate more than 100 domestic and foreign communication protocols and for extension programming of new protocol;
The system has the one-point multiple transmission function to ensure that the data of different platforms is from the same source so as to reduce overlapping investment.

LFWCS-2008

Routine five-parameter water quality analyzer

Provide the automatic cleaning device connection point of electrode and set its output by programming;
Make available the electrode aging, film contamination, rupture or breakage diagnosis functions;
The instrument insulation resistance between power lead and shell is not lower than 20MS;
The monitoring data output adopts 4~20mA or RS485/232;
The turbidity electrode is provided with automatic cleaning brush to eliminate the effect on measurement due to bubble or dirt;
The conductivity sensor with four-electrode technology is featured by wide measuring range, no polarization and strong anti-interference ability;
The operating interface is simple, neat and humanized, and the polarization calibration method is simple.

Pretreatment unit

This product is an integral part of automatic water quality monitoring system, mainly used for pretreatment of water sample when the determination may be affected by rainstorm, great silt or many suspended solids. It can ensure the representativeness of water sample after pretreatment. Adopt the pretreatment technology including ultrasonic wave homogenization, static setting, vacuum filtration and centrifugal separation for pretreatment of water sample so as to reduce the effect of turbidity on determination when ensuring the representativeness of water sample.

It can shatter large particles and conduct automatic homogenization to ensure the representativeness and evenness of water sample;
The system can realize intelligent switching of multiple pretreatment modes based on preset turbidity threshold;
Optional filtration diameter of 0.45 um~63 um;
It has automatic cleaning, automatic back washing and automatic pressurized cleaning functions to reduce manual maintenance;
It can clean deep hole, thin slot and filter screen.

LHQCM-2014

Quality control sampling module

In an on-line water quality monitoring system, it is a module which can automatically prepare test sample for monitoring data reliability and accuracy check of water quality monitoring instrument. It can also be used for parallel sample testing, adding standard recovery testing and password dynamic adding standard testing.

Adding standard error: ‡ 2%
Test relative error: 3%
Adding standard constant volume error: + 2%
Adding standard repeatability: ≤ 1%

LFSC-2007

Data acquisition and transmission instrument

This product is mainly used for real-time monitoring and data collection of field monitoring equipment in environmental monitoring system, which is a main way to collect original monitoring data.

2G memory to store historical data for 5 years above;
Support the multiple transmission from one point and the export of historical data;
Support multiple communication modes including GPRS/CDMA/ADSL/LAN/PSTN;
Built-in standby battery to support continuous operation for 8h above in case of power failure;
One built-in RS485 and one Ethernet surge protection device;
The equipment is provided with GPRS and Ethernet communication modes which can be switched freely on man-machine interface.

LHMCT-2018

Intelligent control terminal

LHMCT-2018 intelligent control terminal has multiple sample modes available for outdoor space, mixed sampling with equal proportion, synchronous backup sampling (parallel sample), and remote sampling to effectively solve the problem such as lack of representativeness of the sample taken or retained on site. It can realize the automatic storage of water sample with routine five-parameter water quality analyzer and various flow measuring devices. The instrument can be applied to sampling for routine and traceability check of surface water, arrangement of enterprise drain outlets and sewage discharge flow monitoring, etc.

It has multiple sampling modes including mixed sampling with equal proportion, synchronous backup sampling (parallel sample), remote sampling and trigger sampling;
It is arranged simply and at low cost to cover the insufficient spatial and temporal distribution problem of existing monitoring network;
IP55 protection class to meet outdoor operating requirement;
It can automatically empty and clean to ensure the representativeness of sample;
It adopts the accurate digital temperature control to meet the outdoor low-temperature operating requirement in winter;
The sample can be retained when sampling to meet the backup check and multi-party testing requirements;
It can realize remote control and mobile control over sample retaining, state inquiry, parameter setting, system maintenance and sample bottle locking;
It can be connected with external flowmeter and routine five-parameter instrument and relate to sampling based on instrument data;
The collected data can be transmitted to center platform via 5G wireless network;
The sample box/bottle shall be sealed and tamper-proof and can be connected with system pipeline in form of quick plug. The bottle can ensure air permeability in case of sample injection and sealing performance when transportation;
The electronic access control is provided and the mobile phone is connected with sampling terminal that the electric control lock can be opened for maintenance or sampling only after the mobile APP passes validation; The video surveillance is provided to monitor the water intaking points in ordinary times, and the sampling terminal position when the proximity sensor gives an alarm or the sampling terminal is in door opening state. When the proximity sensor gives an alarm or the cabinet door is open, the camera will capture image or record video.

IBOT500

Multi-functional sampling bottle

This product can be applied to the sample collection of surface water, industrial wastewater, domestic wastewater, underground water and drinking water.

It can monitor the opening/closing of bottle cover and record opening/closing time and frequency in a realtime manner and can give an alarm in case of valve control failure such as injection valve blocking or switch valve time-out;
It can perceive the sampling bottle depth in water and the conductivity of water body in a real-time manner and can trigger sampling based on the change in water level and conductivity;
It can monitor the sampling and the ambient temperature data during sample delivery and record the position of outdoor sampling points and the moving track of sample during delivery;
It has battery voltage real-time monitoring and remaining capacity alarm functions;
It has local and remote wireless connection modes under which the switch valve and parameter can be set, the sampling bottle state and sample information can be acquired and reported to center platform in a real time manner.

ISAM100

Portable intelligent sampling terminal

This product can be applied to routine sampling of surface water, sampling for arrangement of pollutant discharge monitoring points, sampling for pollution traceability check points, sampling for arrangement of enterprise discharge points, sewage discharge monitoring and other scenarios.

It has multiple sampling modes including timing, time equal proportion, liquid level equal proportion, and remote control;
It is arranged simply and at low cost to cover the insufficient spatial and temporal distribution problem of existing monitoring network;
The sampling terminal can be connected to rain gauge, water level gauge and other monitoring instruments and trigger sampling based on threshold;
It can save sampling record and fault log and upload the record and log to center platform;
It has automatic emptying function;
The sampling bottle can be controlled remotely to prevent the collected water sample being emptied automatically;
It has the mobile APP function to complete sampling, replacement of empty bottle, sample information report, sampling mode setting, single-point control and other operations.

LFLY-DW2004

Water quality automatic sampler

The instrument is based on the all-day unattended concept to be featured by automatic cleaning and emptying functions, less maintenance and multi-parameter data access and transmission. It can realize equal time sampling, equal proportion sampling, equal time and equal proportion sampling, use-defined sampling and instantaneous and mixed sampling of water.

Low temperature storage function;
Automatic sealing function;
Access control function;
Alarm function in case of water sample shortage;
Support at least 24 sampling bottles;
Built-in battery to ensure at least 8h of continuous operation after power failure.

LHWTE-2014

Waste liquor treatment equipment

This product is mainly applied to the waste liquor treatment in automatic water quality monitoring station and laboratory to avoid the occurrence of secondary environmental pollution.

Avoid the occurrence of secondary pollution;
High treatment efficiency of wastewater pollutant;
Simple process, long service life, low investment cost, convenience operation, low operating cost, and stable treatment effect;
Automatic alarm function in case of low waste liquor treatment efficiency, high liquid level or pipeline blocking;
Waste liquor treatment capacity ≥ 10 L/h.

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