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Shanghai Yidian Scientific Instrument Co., Ltd.

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BrandLeichi
OriginShanghai, China
Manufacturer TypeManufacturer
Country of OriginChina
ModelDGB-421
Measurement Range0–50 PCU (Platinum-Cobalt Units)
Accuracy±5% or ±1 PCU
Repeatability≤3.0%
Protection RatingIP65
Power Supply4×AA batteries or USB 5V DC
Dimensions100 × 220 × 80 mm
Weight0.8 kg
DisplayHigh-resolution LCD
CalibrationZero and full-scale calibration with Pt-Co standard solutions
Data Storage200 sets
ComplianceGB/T 5750.4–2023 (Standard Methods for Examination of Drinking Water – Color)
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BrandLeichi
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Origin CategoryDomestic (China)
ModelWZS-186
Price RangeUSD 700–1,400
Form FactorBenchtop / Laboratory
Measurement Range0.000–2000 NTU
Resolution0.001 NTU
Operating Temperature5–35 °C
Accuracy±6%
Light SourceInfrared LED
ComplianceISO 7027, HJ 1075-2019
Protection RatingIP54
Display7-inch color TFT touchscreen
Measurement PrinciplesNephelometric (90° scatter) and Ratio Scatter-Transmission
UnitsNTU, FNU, EBC
Calibration OptionsSingle-point or multi-point (20/200/500/1000/2000 NTU), zero adjustment, factory reset
Data ManagementOnboard storage, USB export, RS-232 printer interface
Software InterfacePC communication via dedicated software
GLP SupportAudit trail, timestamped records, user login (if enabled), data traceability
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional OriginDomestic (China)
ModelWZB-176E
Product TypePortable
Measurement Range(0.00–9.99) NTU, (10.00–99.9) NTU, (100.0–999) NTU, (1000–2000) NTU
Resolution0.01 NTU / 0.1 NTU / 1 NTU
Operating Temperature5–35 °C
Accuracy±6%
Repeatability≤0.5%
Zero Drift±0.5% FS/30 min
Stability±0.5% FS/30 min
Calibration PointsUp to 6 points (2, 20, 200, 500, 1000, 2000 NTU)
Data Storage Capacity2000 records
Display4.3-inch color TFT touchscreen
Protection RatingIP65
Power SupplyRechargeable Li-ion battery
Dimensions & Weight90 × 250 × 90 mm, approx. 0.8 kg
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional CategoryDomestic (China)
ModelWZS-190S
Price RangeUSD 1,400–2,100
Instrument TypeBenchtop / Laboratory
Measurement Range0–4000 NTU (tungsten lamp), 0–2000 NTU (860 nm LED)
Resolution0.001 NTU (lowest range)
Accuracy±6% FS
Repeatability≤0.5%
Zero Drift±0.5% FS / 30 min
Stability±0.5% FS / 30 min
Light SourcesDual-source — Tungsten lamp (400–600 nm, compliant with US EPA Method 180.1 & HJ 1075-2019), 860 nm LED (compliant with ISO 7027 & HJ 1075-2019)
Calibration PointsUp to 8-point (tungsten), up to 7-point (LED)
Data Storage Capacity2000 turbidity measurements per light source + 2000 verification records + 500 system logs + 4000 operation logs
Environmental Operating Conditions5–35 °C, ≤85% RH
Power SupplyAC 100–240 V input, DC 20 V output
Dimensions & Weight300 × 200 × 88 mm, ~1.5 kg
Protection RatingIP54
Compliance StandardsJJG 880–2006, HJ 1075–2019, ISO 7027:2016, US EPA Method 180.1
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional OriginDomestic (China)
ModelWZB-175
Price RangeUSD 700–1,400
Product TypePortable
Measurement Range0–2000 NTU (auto-ranging across four sub-ranges)
Resolution0.01 / 0.1 / 1 NTU (auto-selected by range)
Operating Temperature5–40 °C
Relative Humidity≤85% RH
Accuracy±6% of reading
Repeatability≤0.5%
Zero Drift±0.5% FS / 30 min
Stability±0.5% FS / 30 min
Calibration PointsUp to 6 points (2, 20, 200, 500, 1000, 2000 NTU)
Data Storage Capacity2000 measurements
Display4.3-inch color TFT LCD touchscreen
Protection RatingIP65
InterfaceMicro-USB (PC communication), RS-232 (printer output)
Power SupplyRechargeable Li-ion battery (with AC adapter: Input AC 100–240 V, Output DC 5 V / 2 A)
Dimensions & Weight90 × 250 × 90 mm, approx. 0.8 kg
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BrandLeichi
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional CategoryDomestic (China)
ModelWZB-172
Price RangeUSD 0.15–750 (FOB)
Product TypePortable
Measurement Range0.00–500.0 NTU
Resolution0.01 NTU
Accuracy±6% FS
Light Source860 nm Infrared LED
ComplianceISO 7027 & HJ 1075-2019
Protection RatingIP65
Data Storage1000 records
Calibration PointsZero + up to 4 points (2, 20, 200, 500 NTU)
Display3.5-inch color LCD
PowerRechargeable Li-ion battery (DC5V/2A input via Micro-USB)
Dimensions90 × 250 × 90 mm
Weight~0.8 kg
Environmental Operating Conditions5–40 °C, ≤85% RH
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional ClassificationDomestic (China)
ModelWZB-172E
Product TypePortable
Measurement Range(0.00–9.99) NTU, (10.0–99.9) NTU, (100–500) NTU
Resolution0.01 NTU / 0.1 NTU / 1 NTU
Accuracy±6%
Repeatability≤0.5%
Zero Drift±0.5% FS/30 min
Stability±0.5% FS/30 min
Calibration PointsZero + up to 4 points (2, 20, 200, 500 NTU)
Data Storage Capacity1000 records
Display3.5-inch color LCD
Ingress ProtectionIP65
Operating Temperature5–40 °C
Relative Humidity≤85% RH
Power SupplyRechargeable Li-ion battery
Dimensions & Weight90 × 250 × 90 mm, approx. 0.8 kg
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Country of OriginChina
ModelDGB-421F
PriceUSD 560 (FOB Shanghai)
Measurement PrincipleAbsorbance-based photometric determination at 365 nm
UnitsPCU, Hazen, mg Pt·L⁻¹
Range0.0–99.9 and 100–500 PCU
Accuracy±3% or ±0.5 PCU
Repeatability≤1.5%
Light Source365 nm high-stability LED
Cuvette Pathlength25 mm
DisplayHigh-resolution color LCD
Data Storage200 measurement records with GLP-compliant metadata (user ID, sample ID, timestamp, calibration status)
InterfaceUSB 2.0 (PC data transfer), RS-232 (printer output)
PowerRechargeable Li-ion battery (5 V DC input
Dimensions100 × 245 × 88 mm
Weight0.5 kg
Ingress ProtectionIP65
ComplianceGB/T 5750.4–2023 (Standard Methods for Examination of Drinking Water – Color Determination), ISO 7887:2011, ASTM D1209, USP <631>
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BrandLeichi
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional ClassificationDomestic (China)
ModelWZS-182E
Form FactorBenchtop / Laboratory
Measurement Range(0.00–9.99) NTU, (10.0–99.9) NTU, (100–500) NTU
Resolution0.01 / 0.1 / 1 NTU
Accuracy±6%
Light SourceTungsten-Halogen Lamp
Measurement PrincipleNephelometric (90° scattered light) and Ratio (scattered + transmitted light) methods
ComplianceEPA Method 180.1, HJ 1075-2019
Display5.7-inch high-resolution color LCD
Protection RatingIP54
Calibration Standards IncludedLong-life turbidity standards at 20, 200, and 500 NTU
Data ManagementInternal storage with USB and RS-232 interfaces
Regulatory SupportGLP-compliant data traceability, audit trail capability, user-accessible calibration history
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BrandLeici
OriginShanghai, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Product TypeBenchtop Laboratory Turbidimeter
Measurement Range0.00–500 NTU
Resolution0.01 NTU (at low range), 0.1 NTU (mid range), 1 NTU (high range)
Operating Temperature5–35 °C
Accuracy±6% FS
Repeatability≤0.5%
Zero Drift±0.5% FS / 30 min
Stability±0.5% FS / 30 min
Calibration PointsUp to 5 points (2, 20, 50, 200, 500 NTU)
Data Storage Capacity1000 records
Display5.7-inch color LCD
Protection RatingIP54
Power SupplyDC24V adapter (AC100–240V input)
Dimensions & Weight189 × 282 × 84 mm, ~1.5 kg
ComplianceISO 7027, HJ 1075-2019
Measurement PrinciplesNephelometric (90° scatter) and Ratio (scatter + transmission) methods
Units SupportedNTU, FNU, EBC
ConnectivityRS-232 serial port, USB interface
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BrandLeici
OriginShanghai, China
Manufacturer TypeOriginal Equipment Manufacturer (OEM)
Regional ClassificationDomestic (PRC)
ModelWZT-701
Price RangeUSD 1,400 – 2,800
ConfigurationOnline Continuous Monitoring
Measurement Range0.00–500.0 NTU
Resolution0.01 NTU (≤10 NTU), 0.1 NTU (>10 NTU)
Accuracy±10% FS
Repeatability≤2%
Zero Drift±0.5% FS / 30 min, ±1% FS / 24 h
Span Drift±5% FS / 24 h
MTBF≥720 hours
Enclosure RatingIP65
Power SupplyAC 220 V ±10%, 50 Hz ±2%
Dimensions (W×H×D)160 × 160 × 110 mm
Weight5.0 kg
OutputIsolated 4–20 mA DC (user-configurable span/zero), RS-232 serial interface
CalibrationSingle-point or two-point standard calibration
Alarm FunctionsProgrammable high/low limit alerts with latching logic
Data RetentionNon-volatile memory for settings and calibration history
Environmental Operating Range0–40 °C, <90% RH non-condensing
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional ClassificationDomestic (China)
ModelWZS-180A
Price RangeUSD 1–720 (FOB)
Form FactorBenchtop / Laboratory
Measurement Ranges(0.00–20.00) NTU, (20.0–200.0) NTU, (200–1000) NTU
Resolution0.01 NTU (low range), 0.1 NTU (mid range), 1 NTU (high range)
Accuracy±8% FS
Repeatability≤1.0%
Zero Drift±1.0% FS / 30 min
Stability±0.5% FS / 30 min
Light Source860 nm Infrared LED, compliant with ISO 7027 and HJ 1075
Calibration OptionsZero-point correction + up to 3-point calibration (2, 20, 200 NTU)
DisplayMonochrome LCD
Power SupplyAC 220 V ±10%, 50 Hz ±1 Hz
IP RatingIP65
Dimensions (L×W×H)330 × 250 × 130 mm
Weight~2.5 kg
Standard AccessoriesCertified 400 NTU turbidity standard solution, calibrated turbidity vials
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional CategoryDomestic (China)
ModelWZS-188E
Form FactorBenchtop / Laboratory
Measurement Range(0.000–9.999) NTU, (10.00–99.99) NTU, (100.0–999.9) NTU, (1000–4000) NTU
Resolution0.001 / 0.01 / 0.1 / 1 NTU
Accuracy±6%
Light SourceTungsten-Halogen Lamp
ComplianceUS EPA Method 180.1, HJ 1075–2019
Measurement PrincipleNephelometric (90° scatter) and Scatter-Transmission dual-mode
IP RatingIP54
Display7-inch HD color capacitive touchscreen
Calibration OptionsSingle-point or multi-point
UnitsNTU, FNU, EBC
ModesStandard measurement, averaging mode (for dynamic suspension stabilization), auto-ranging
Data ManagementOnboard storage, recall, deletion, USB export, RS-232 printer output
Software InterfacePC communication via dedicated software (USB)
GLP SupportFull audit trail, timestamped records, user ID logging, calibration history retention
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BrandLeici
OriginShanghai, China
Manufacturer TypeDirect Manufacturer
Regional ClassificationDomestic (China)
ModelWZB-170
Product TypePortable
Measurement Range0.00–20.00 NTU, 20.0–200.0 NTU, 200–1000 NTU (auto-ranging)
Resolution0.01 / 0.1 / 1 NTU (auto-selected)
Operating Temperature5–35 °C
Accuracy±8 % FS
Repeatability≤1.0 %
Zero Drift±1.0 % FS / 30 min
Stability±0.5 % FS / 30 min
Light SourceInfrared LED (860 nm), compliant with ISO 7027 and HJ 1075
Calibration PointsZero + up to three standard points (2, 20, 200 NTU)
DisplayMonochrome LCD
Power Supply4 × AA batteries or DC 5 V adapter (AC 200–240 V input)
Dimensions100 × 220 × 80 mm
Weight~0.8 kg
Protection RatingIP65
Included AccessoriesStandard turbidity bottles, protective carrying case, 400 NTU calibration standard solution
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