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Shanghai Yidian Scientific Instrument Co., Ltd.

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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelSJG-705
Price RangeUSD 7,000 – 14,000
Display7-inch color TFT touchscreen (Chinese UI)
Communication InterfacesRS-232 OR RS-485 OR Ethernet (user-selectable)
Measurement ModesContinuous & programmable interval logging
Data StorageInternal non-volatile memory supporting >100,000 records
OptionalAutomated cleaning module for sensors and flow cell
Parameters SupportedpH, ORP, Conductivity/TDS, Dissolved Oxygen (DO), Turbidity (NTU), Temperature
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Product OriginDomestic (China)
ModelDGB-402F
Instrument TypePortable
Measurement PrincipleDPD Spectrophotometry
Measured ParametersResidual Chlorine, Total Chlorine
Range0–3.00 mg/L (Residual & Total Chlorine)
Accuracy±3% or ±0.02 mg/L
Repeatability≤1.0%
Resolution0.001 mg/L (Concentration), 0.001 ABS (Absorbance)
LOD≤0.02 mg/L
Wavelength515 nm
Calibration1–3 Point Calibration
Data Storage200 Sets Each for Residual and Total Chlorine
Cuvette Size25 mm Round Cell
Operating Temperature5–35 °C
Relative Humidity≤85% RH
Power SupplyRechargeable Lithium Battery
Dimensions (L×W×H)230 × 85 × 50 mm
Weight~0.5 kg
IP RatingIP65
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BrandLeici
OriginShanghai, China
Manufacturer TypeManufacturer
Country of OriginChina
ModelDZS-708T
Instrument TypeLaboratory Water Quality Analyzer
Measurable ParameterspH, Conductivity, Ion Concentration (Na⁺, K⁺, NH₄⁺, Cl⁻, F⁻, etc.), Dissolved Oxygen (DO), ORP, TDS, Salinity, Resistivity, Ash Content (White Sugar & HFCS), Temperature
Accuracy ClasspH/pX: 0.001-grade
Conductivity0.5-grade
Measurement RangespH (-2.000–20.000)
ResolutionpH/ pX: 0.001
mV0.01
Conductivity0.001 μS/cm (auto-ranging)
DO0.01 mg/L
Temp0.1 °C
Key ComplianceGLP-compliant data management, FDA 21 CFR Part 11-ready audit trail (via software configuration), GMP-aligned user permission hierarchy and operation logging
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional ClassificationDomestic (China)
ModelJPSJ-606T
Price RangeUSD 700–1,400
Instrument TypeLaboratory Benchtop
Measurement PrinciplePolarographic Electrochemical Probe
Dissolved Oxygen Range (Electronic Unit)0.00–99.99 mg/L
Accuracy±0.10 mg/L (0.00–50.00 mg/L)
Instrument Accuracy±0.30 mg/L (≤20.00 mg/L)
Repeatability±2.0%
Response Time≤45 s (90% response at 20.0 °C)
Temperature CompensationAutomatic
Atmospheric Pressure CompensationManual or Auto (kPa, mbar, Torr, atm)
Salinity CompensationManual
Saturation Range0.0–600.0 %
Temperature Range−10.0–135.0 °C
Temperature Accuracy±0.3 °C (0.0–60.0 °C)
Data Storage Capacity1,000 datasets
ConnectivityRS-232, USB, optional LIMS integration
ComplianceGLP, GMP-ready audit trail support
IP RatingIP54
Power SupplyAC 100–240 V → DC 24 V adapter
Dimensions & Weight220 × 195 × 68 mm, 0.95 kg
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BrandLeici
OriginShanghai, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Country of OriginChina
ModelDZB-718L-G
Instrument TypePortable / Handheld Water Quality Analyzer
Measured ParameterspH / pX, Ion Concentration, mV, Conductivity, Resistivity, TDS, Salinity, Ash Content, Dissolved Oxygen (DO), DO Saturation, Temperature
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BrandLeiCi
ModelTP-585
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Instrument TypeOnline Analyzer
Measured ParameterTotal Phosphorus (TP)
Measurement Range0–50 mg/L
Accuracy±10% of reading (as per actual water sample comparison)
Repeatability≤±10%
Minimum Measurement Cycle40 min (adjustable from 5–120 min)
Digestion TimeConfigurable
Sampling Interval20–9999 min, with on-the-hour measurement option
Calibration Frequency1–99 days, user-definable start time
Maintenance Interval~30 min per month
Analog Output1 × 4–20 mA (optional 2-channel)
Communication InterfaceRS232 or RS485
Digital I/O1–6 relay outputs (220 VAC / 2 A)
Operating Environment+5 to +28 °C, ≤99% RH (non-condensing)
MTBF≥720 h
Dimensions (W×D×H)1430 × 500 × 403 mm
Display & ControlTouchscreen interface with local command input
Data RetentionNon-volatile memory preserves configuration and logs during power loss
Auto-RecoveryFull system reset and residual reagent purge upon power restoration or fault recovery
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BrandLeichi
OriginShanghai, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Product CategoryDomestic
ModelDZS-708TP Automated Electrochemical Water Quality Analyzer
Instrument TypeLaboratory Water Quality Analyzer
Measurable ParameterspH, Conductivity, Dissolved Oxygen (DO), Ion Concentration (pX), ORP, TDS, Salinity, Resistivity, Ash Content (White Sugar & HFCS), Temperature
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BrandLeici
OriginShanghai, China
Manufacturer TypeOEM Manufacturer
Country of OriginChina
ModelSJG-702
PriceUSD 14,000 (FOB Shanghai)
Measurement PrinciplespH & Conductivity & TDS — Electrode-based
CalibrationBuilt-in Standard Curves + Manual Calibration Support
ComplianceCE, RoHS
Sensor TypesPH-2-173 (pH), DJS-2-141 (Conductivity), TGF-2-005 (Turbidity), DCS4.2MA2/DCS4MA5 (Free Chlorine), DCP4.0MA2/DCP4.0MA5 (Total Chlorine), DCD4.2MA2/DCD4.2MA5 (Chlorine Dioxide)
DisplayColor TFT Touchscreen
Power SupplyAC 220 V ±10%, 50 Hz (Optional Solar DC Input)
CommunicationRS-232 / RS-485 Serial Interface, Optional Wireless GPRS/4G Module
Operating Environment0–40 °C, ≤90% RH
Dimensions (W×D×H)730 × 520 × 330 mm
Weight20 kg
Auto-cleaningIntegrated Brush + Bubble-removal Cell + Drain Control for Turbidity Sensor
Measurement ModesContinuous, Intermittent Cycle, Timed, and Manual
AlarmProgrammable Upper/Lower Limits with Relay Output
Data LoggingInternal Storage + Remote Upload to Central SCADA or Cloud Platform
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Product CategoryDomestic (China-Made)
ModelDGB-403F
Instrument TypePortable
Measurement PrincipleDPD Colorimetric Spectrophotometry (515 nm & 420 nm LED Sources)
Measured ParametersResidual Chlorine (LR/HR), Total Chlorine (LR/HR), Chlorine Dioxide (LR/HR), Monochloramine (LR/HR), Chlorite, Chlorate, Hydrogen Peroxide
Residual Chlorine HR Range0.20–12.0 mg/L
Accuracy (Residual Cl₂ HR)±0.1 mg/L or ±5%
Repeatability (Residual Cl₂ HR)≤1%
Resolution (Residual Cl₂ HR)0.1 mg/L
LOD (Residual Cl₂ HR)≤0.2 mg/L
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BrandLeici
OriginShanghai, China
Manufacturer TypeManufacturer
Country of OriginChina
ModelJPBJ-609L
Instrument TypePortable
Measurement PrincipleElectrochemical Clark-type Polarographic Probe
Measurement Range(0.00–50.00) mg/L
Accuracy±0.10 mg/L (0.00–50.00 mg/L)
Resolution0.01 mg/L
Response Time≤45 s (90% response at 20 °C)
Temperature CompensationAutomatic/Manual (−10.0 to 135.0 °C)
Atmospheric Pressure CompensationManual (kPa, mbar, Torr, atm)
Salinity CompensationManual
IP RatingIP65
BatteryRechargeable Li-ion
Dimensions90 × 255 × 40 mm
Weight0.5 kg
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BrandLei-Mag
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Instrument TypeLaboratory Water Quality Analyzer
ModelDZS-708L
Measurement ParameterspH, ORP, mV, pX, Ion Concentration, Conductivity, Resistivity, TDS, Salinity, Ash Content, Dissolved Oxygen (DO) Concentration, DO Saturation, Temperature
Display7-inch HD color capacitive touchscreen
IP RatingIP54
Channels4 independent measurement channels
Supported ModulespH Module, pX Module, EC-T (2-electrode conductivity), EC-F (4-electrode conductivity), DO-F (fluorescence-based DO), DO-P (polarographic DO)
ComplianceGLP, GMP-ready audit trail, ASTM D1125, ISO 7888, ISO 5814, USP <643>, EN 27888
Data Storage1000 measurement records per parameter, 100 calibration sets, 1000 verification logs
InterfacesRS-232, USB-A, USB-B (PC connection), optional barcode scanner support
Operating Environment0–40 °C, ≤85% RH
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BrandLeiCi
OriginShanghai, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Product CategoryDomestic
ModelDGB-480
Instrument TypePortable / Handheld Water Quality Analyzer
Detection ParametersTurbidity, Color, Transmittance, Ozone, Nitrite Nitrogen, Urea, Hexavalent Chromium, Manganese, Total Nitrogen, Nitrate Nitrogen, Nitrate, Formaldehyde, Water Hardness, Zinc, Nitrite, Free Chlorine, Total Chlorine, Chlorine Dioxide, Permanganate Index, Low-Concentration COD<sub>Cr</sub>, High-Concentration COD<sub>Cr</sub>, Cadmium, Ammonia Nitrogen, Ammonium Ion, Total Phosphorus, Total Phosphate, Nickel, Ferrous Ion, Iron, Sulfite
Wavelengths365 nm, 420 nm, 470 nm, 515 nm, 540 nm, 620 nm, 650 nm, 850 nm
Measurement ModesConcentration (mg/L), Absorbance (Abs), Transmittance (%)
ComplianceISO 7027 (turbidity), GLP data traceability
Data Storage2000 records
Power SupplyRechargeable Li-ion battery (DC 5 V input, AC 100–240 V adapter)
Dimensions105 × 241 × 90 mm
Weight0.6 kg
IP RatingIP65
DisplayColor LCD touchscreen
Sample VesselsΦ16 mm cuvettes or Φ25 mm vials
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BrandLeichi
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional ClassificationDomestic (China)
ModelDWG-8025A
Price RangeUSD 2,800 – 7,000 (FOB Shanghai)
Instrument CategorySodium Ion Analyzer
Instrument TypeOnline Continuous Monitoring System
Measurement Range0.1–1000 µg/L Na⁺
Resolution0.1 µg/L (≤10 µg/L), 1 µg/L (>10 µg/L)
Temperature Range−10.0 to +120.0 °C
Temperature Resolution0.1 °C
Accuracy (Sodium)±10% of reading ±0.1 µg/L
Accuracy (Temperature)±0.5 °C (0.0–60.0 °C), ±1.0 °C (other)
Repeatability≤5% of reading
Drift Stability±10% of reading / 24 h (system), ±3% of reading / 24 h (electronic unit)
Enclosure RatingIP65
Power SupplyAC 220 V ±10%, 50 Hz ±1%
OutputIsolated 4–20 mA DC (configurable span), RS-232 or RS-485 (user-selectable)
OptionalIntegrated pH auto-adjustment module
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BrandLeichi
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelDO-30
Instrument TypePortable
Measurement PrincipleElectrochemical (Clark-type Polarographic Sensor)
Dissolved Oxygen Range0.0–20.0 mg/L
Resolution0.1 mg/L
Accuracy±0.3 mg/L
Repeatability≤0.2 mg/L
Temperature Range0.0–60.0 °C
Temp. Resolution0.1 °C
Temp. Accuracy±0.3 °C
Auto Temperature CompensationYes (0–50.0 °C)
IP RatingIP67
Power4 × AAA batteries
Battery Life>200 h
Dimensions40 × 30 × 188 mm
Weight~0.15 kg
Enclosure MaterialABS
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BrandLeiCi
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Region CategoryDomestic (China)
ModelBOD-573
Price RangeUSD 1,400 – 7,200
Instrument TypeLaboratory BOD Analyzer
Measurement PrincipleDifferential Pressure Method
Measurement Range0–4000 mg/L
AccuracyCompliant with HJ 505–2009 and ISO 5815-1:2019 for BOD₅ determination (validated using glucose-glutamic acid standard solution, BOD₅ = 180–230 mg/L)
Sample CapacityUp to 6 samples per run
Incubation DurationProgrammable from 1 to 30 days
Data Retention10 years of BOD₅ result records
Cultivation Vessel Volume580 mL
Temperature Control20 ± 1 °C
Power SupplyAC 110–220 V, 50/60 Hz
Rated Power10 W
Dimensions (W × D × H)272 × 185 × 75 mm
Net Weight2.4 kg
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BrandLeici
OriginShanghai, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Product TypeBenchtop Ion Analyzer
Ion Measurement Range1.00 × 10⁻⁹ to 9.99 × 10⁹ (selectable units: mol/L, mmol/L, g/L, mg/L, µg/L, ppm)
Detection LimitEquivalent to measurement range
Response Time≤5 s
Accuracy Class0.001
Temperature Range−10.0 to 135.0 °C (14.0 to 275.0 °F)
mV Range−2000.00 to +2000.00 mV
pH/pX Range−2.000 to 20.000
pH/pX Resolution0.001
mV Resolution0.01 mV
Temperature Resolution0.1 °C/°F
Input PowerAC 100–240 V → DC 24 V
Dimensions220 × 195 × 68 mm
Weight0.95 kg
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BrandLeici
OriginShanghai, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Regional ClassificationDomestic (China)
ModelDWG-8003
Price RangeUSD 7,000–14,000
Instrument CategoryFluoride Ion Analyzer
Instrument TypeOnline Continuous Monitoring System
Measurement Range0.05–1900 mg/L
Response Time (90%)≤5 min
Resolution0.01 mg/L
Accuracy±10% of reading
Repeatability≤3% RSD
Stability±10% over 4 h
Power SupplyAC 220 V ±10%, 50 Hz ±1%
Dimensions (W×D×H)600 × 450 × 160 mm
Weight50 kg
OutputIsolated 4–20 mA DC (configurable span)
Temperature ControlIntegrated Peltier-based thermostatic module
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[BrandLeiCi
OriginShanghai, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Product CategoryPortable/HANDHELD Water Quality Analyzer
Measurement ParameterspH, Conductivity, Resistivity, TDS, Salinity, Dissolved Oxygen (DO), Temperature
Accuracy ClasspH/pX: 0.001-grade
Conductivity/Resistivity/TDS/Salinity0.5-grade
DO±0.30 mg/L (≤20.00 mg/L), ±10.0% (>20.00 mg/L)
Temperature±0.3 °C (0–60 °C), ±1.0 °C (other ranges)
DisplayHigh-resolution color LCD touchscreen with bilingual (English/Chinese) UI
Protection RatingIP65
Power SupplyRechargeable lithium-ion battery
AC adapter input100–240 V AC, output: 5 V DC
Dimensions & Weight90 × 255 × 40 mm, 0.5 kg]
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BrandLeici
OriginShanghai, China
Manufacturer TypeManufacturer
Country of OriginChina
ModelDZB-715
Instrument TypePortable/Handheld Water Quality Analyzer
Measured ParametersWater Temperature, pH/ORP, Conductivity/Salinity, Dissolved Oxygen, Depth
Display3.5" TFT Color Touchscreen
IP RatingIP67
BatteryRechargeable Lithium-ion
Standard Cable Length10 m (customizable up to 100 m)
Data Storage5000 measurement sets
GPSOptional
GPRS TransmissionOptional
InterfaceUSB, RS485
CalibrationSingle-point or multi-point, GLP-compliant
Operating DepthUp to 10 m
Dimensions230 × 90 × 55 mm
Weight0.33 kg
AccuracypH ±0.10 pH
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BrandLeici
OriginShanghai, China
Manufacturer TypeManufacturer
Product OriginDomestic (China)
ModelDZB-712F
Instrument TypePortable / Handheld Water Quality Analyzer
Measured ParameterspH, Conductivity, Dissolved Oxygen (DO)
IP RatingIP65
DisplayHigh-resolution color LCD touchscreen
PowerRechargeable lithium battery (DC5V input via AC adapter)
Dimensions90 × 258 × 42 mm
Weight0.5 kg
Data Storage1000 datasets per parameter group
ComplianceGLP-compliant data logging with audit trail support
ConnectivityUSB port for PC/LIMS integration
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BrandLeici
OriginShanghai, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Region of ManufactureDomestic (China)
ModelDWS-296
Instrument TypeBenchtop Laboratory Analyzer
Measurement PrincipleGas-Sensing Ion-Selective Electrode (ISE) Method
Measurement Range0.05–1000 mg/L NH₃–N
Accuracy±1% of reading
Detection Limit0.05 mg/L
Analysis Time5–10 minutes per sample
Throughput1 sample per run
DisplayLCD with Chinese GUI
Data Storage200 measurement records
Calibration2-point calibration supported
ConnectivityUSB interface for PC communication via proprietary software
Temperature ControlIntegrated thermostatic system (0.0–40.0 °C)
Measured ParameterspN (–log[NH₃]), mV, NH₃–N concentration (mg/L), temperature (°C)
Electronic Unit ErrorpN ±0.01 pN ±1 digit
Stability≤±0.01 pN / 3 h
Power SupplyControl unit: 9 V DC, 500 mA (center-positive)
Measurement unitAC 220 V ±10%, 50 Hz ±1 Hz
Dimensions & WeightControl unit: 300 × 220 × 80 mm, 1 kg
Measurement unit370 × 380 × 510 mm, 13 kg
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional ClassificationDomestic (China)
ModelPXSJ-270F
Price RangeUSD 150–750 (est.)
Instrument CategoryMulti-Ion Analyzer
Form FactorBenchtop
pX Measurement Range(−2.00 to 20.00) pX
pX Accuracy±0.01 pX
Temperature Range(−5.0 to 110.0) °C / (23.0 to 230.0) °F
pH Range(−2.00 to 20.00) pH
pH Accuracy±0.01 pH
mV Range(−2000.0 to +2000.0) mV
mV Resolution0.1 mV
Ion Concentration Unitsmol/L, mmol/L, g/L, mg/L, μg/L
Data Storage Capacity500 datasets
ConnectivityRS-232, USB
IP RatingIP54
ComplianceGLP-compliant data logging with audit trail support
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BrandLeici
OriginShanghai, China
Manufacturer TypeManufacturer
Product CategoryDomestic
ModelSJG-791B
Instrument TypeOnline Analyzer
Measurement PrincipleElectrochemical Amperometric Sensor Method
Measured ParametersResidual Chlorine / Total Chlorine / Chlorine Dioxide / Ozone (selectable single parameter)
Measurement Range0.005–2.000 mg/L (standard range)
Accuracy±1% FS (for residual chlorine with DCS4H-M0c electrode)
Resolution0.001 mg/L
Output SignalIsolated 4–20 mA DC (max. load 600 Ω)
Digital InterfaceRS-485
Temperature CompensationAutomatic (5–40 °C sample range)
Enclosure RatingIP65
Power SupplyAC 220 V ±10%, 50 Hz
InstallationWall-mounted console with flow-through sensor housing
Sensor Cable Length5 m (standard)
Sample Flow Rate0.3–0.5 L/min
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BrandLeici
OriginShanghai, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Product CategoryDomestic
ModelCOD-583
PricingUSD 12,300 (FOB Shanghai)
Measurement PrinciplePotassium Permanganate Oxidation with ORP Endpoint Detection
Instrument TypeOnline Continuous Analyzer
Repeatability≤ ±5% RSD
Accuracy±10% of reading (as per GB/T 11892–1989)
Power Failure RecoveryYes
Remote ConnectivityEthernet & Modbus TCP
Calibration VerificationAutomated Zero & Span Check
Fluidic ArchitectureSequential Injection with Multi-Position Rotary Valve
Tubing MaterialFEP (fluorinated ethylene propylene), ID ≥ 1.0 mm
Diagnostic CapabilityEmbedded Self-Diagnostic Routine
Maintenance Interval≥ 30 days under standard operation
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