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| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Instrument Type | Benchtop Laboratory Conductivity Meter |
| Measurement Parameters | Conductivity, TDS, Resistivity, Salinity, Temperature |
| Conductivity Range | 0.000 µS/cm to 3000 mS/cm |
| TDS Range | 0.000 mg/L to 1000 g/L |
| Resistivity Range | 5.00 Ω·cm to 100.0 MΩ·cm |
| Salinity Range | 0.00–8.00% (w/w) |
| Temperature Range | −5.0 to 130.0 °C |
| Accuracy | ±0.5% of full scale (FS) |
| Minimum Resolution | 0.001 µS/cm |
| Calibration | Up to 5-point conductivity calibration with auto-recognition of GB-standard reference solutions (4 preloaded) |
| Compensation Modes | Automatic temperature compensation (ATC), pure water conductivity correction, seawater salinity compensation |
| Connectivity | RS232/USB interface for PC and USB flash drive |
| Data Management | 1000 stored measurement records per parameter type |
| Software Compatibility | Leici LabSuite™ PC software (optional) for data export, statistical analysis, report generation, and 21 CFR Part 11–compliant electronic signatures |
| Brand | SANXIN |
|---|---|
| Origin | Shanghai, China |
| Instrument Type | Portable |
| Parameter Types | pH, ORP, Conductivity, TDS, Salinity, Resistivity, Dissolved Oxygen, Temperature |
| pH Range | −2.00 to 19.999 |
| pH Resolution | 0.1 / 0.01 |
| pH Accuracy | ±0.01 |
| Conductivity Range | 0–200 mS/cm (5 segments) |
| Conductivity Accuracy | ±1.0% FS |
| DO Range | 0–40.00 mg/L, 0–199.9% saturation |
| DO Accuracy | ±0.10% FS |
| Temperature Compensation | Automatic (0–100 °C for pH |
| Calibration | Auto-recognition of 13 pH buffers (US, NIST, Chinese series) |
| Data Storage | 100–400 sets |
| Power | 2 × AA batteries (1.5 V), >100 h life |
| Dimensions (meter) | 65 × 120 × 31 mm |
| Weight (meter) | 180 g |
| Ingress Protection | IP57 |
| Certifications | ISO 9001:2000, CE, CMC |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Instrument Type | Benchtop Conductivity Meter |
| Measurement Principle | Two-electrode AC conductivity measurement with frequency auto-switching |
| Conductivity Range | 0.000 µS/cm to 200.0 mS/cm |
| TDS Range | 0.000 mg/L to 100.0 g/L |
| Temperature Range | −5.0 °C to 110.0 °C |
| Display | 6-inch high-resolution LCD |
| Protection Rating | IP54 |
| Calibration | Single-point calibration with auto-recognition of four standard solutions (146.5 µS/cm, 1408 µS/cm, 12.85 mS/cm, 111.3 mS/cm) |
| Temperature Compensation | Automatic and manual modes |
| Data Storage | 50 measurement sets with recall and deletion |
| Compliance | JB/T 9366–2017, GB/T 11007–2008, JJG 376–2007, HJ 1396–2024 |
| Brand | DELEITE |
|---|---|
| Origin | Shanghai, China |
| Model | APT300 |
| Instrument Type | General-Purpose Potentiometric Titrator |
| Measurement Range | 0 to ±1999 mV, 0 to 14.00 pH |
| Accuracy | 0.1% F.S. (mV), ±0.01 pH |
| Control Precision | ±0.03 pH, ±3 mV |
| Input Impedance | >10¹² Ω |
| Operating Temperature | 5–40 °C |
| Relative Humidity | <85% RH |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Power Consumption | 20 W |
| Weight | 6 kg |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Instrument Type | Benchtop |
| Parameter Types | Multi-parameter (pH, mV, Temperature) |
| Measurement Range | (−2.00 to 20.00) pH |
| Resolution | 0.01 pH (selectable to 0.1 pH) |
| Accuracy | ±0.01 pH |
| Temperature Compensation | Automatic and Manual |
| Calibration Points | 1–5-point pH calibration |
| Buffer Recognition | Auto-identification of GB, DIN, and NIST standard buffer sets |
| Data Storage Capacity | 500 measurement records |
| Compliance | GLP-compliant data management |
| Connectivity | RS-232 (for serial printers), USB (for PC communication) |
| Protection Rating | IP54 |
| Standard Accessories | Tri-combination pH electrode, electrode stand, dust cover, calibration buffer solutions |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | i-301 |
| Portability | Portable |
| Intended Use | Laboratory |
| Conductivity Range | 0.000 µS/cm to 200 mS/cm |
| TDS Range | 0–100 g/L |
| Resistivity Range | 0–10 MΩ·cm |
| Salinity Range | 0–80 ppt |
| Temperature Range | −5 to 55 °C |
| Accuracy | ±0.5% FS (conductivity), ±0.1 °C (temperature) |
| Minimum Resolution | 0.01 µS/cm (conductivity), 0.1 °C (temperature) |
| Display | 7-inch color TFT capacitive touchscreen |
| Calibration | Auto-identification of standard solutions |
| cell constant options | 0.01, 0.1, and 1.0 cm⁻¹ |
| Compliance | IP54 ingress protection |
| Brand | SANXIN |
|---|---|
| Origin | Shanghai, China |
| Model | PHB-3 |
| Instrument Type | Pen-style pH Meter |
| Measurement Range | 0.0–14.0 pH |
| Resolution | 0.1 pH |
| Accuracy | ±0.01 pH |
| Calibration | Single-point (pH 7.00) |
| Temperature Compensation | None |
| Power Supply | Two AAA batteries (1.5 V × 2) |
| Dimensions | 176 × 25 × 39 mm |
| Weight | 95 g |
| IP Rating | IP57 |
| Calibration Solution Compatibility | USA-standard pH buffers (e.g., pH 4.01, 7.00, 10.01) |
| Brand | WTW |
|---|---|
| Origin | Germany |
| Model | Cond 3310 |
| Portability | Portable |
| Application | Laboratory & Field Use |
| Conductivity Range | 0.0 – 1000 mS/cm |
| TDS Range | 0 – 1999 mg/L, 0 – 199.9 g/L |
| Resistivity Range | 0.00 – 20 MΩ·cm |
| Salinity Range | 0.0 – 70.0 (IOT-based) |
| Temperature Range | –5.0 – 105.0 °C |
| Accuracy | ±0.5% of reading |
| Minimum Resolution | 0.001 µS/cm |
| Calibration | 1–5 point, auto-buffer recognition (DIN/NIST), electrode constant adjustment range: 0.090–25.000 cm⁻¹ |
| Data Storage | 200 manual + 5000 interval-logged entries |
| IP Rating | IP66/IP67 |
| Auto-Temperature Compensation (ATC) | Yes |
| Display | Backlit graphical LCD |
| Power | Up to 1000 h battery life (non-backlit), 100 h (backlit continuous) |
| USB Interface | Waterproof, PC data transfer compliant |
| Brand | OHAUS |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Regional Classification | Domestic (China) |
| Model | ST400 |
| Instrument Type | Portable (not benchtop — correction based on product description) |
| Parameter Types | pH and Temperature |
| Measurement Accuracy | ±0.01 pH |
| Measurement Range | −2.00 to 16.00 pH |
| Resolution | 0.01 pH |
| Calibration Solutions | China-specific buffer set (pH 4.01, 7.00, 10.01 at 25 °C) |
| IP Rating | IP67 (instrument and electrode) |
| Battery | Rechargeable Li-ion, up to 40 h continuous operation, ≥300 charge cycles |
| Data Storage | 1000 measurement records |
| Interface | Micro-USB for data export |
| Display | Backlit LCD with graphical user interface |
| Key | Brand: Leici |
|---|---|
| Origin | Shanghai, China |
| Model | DDSJ-308F |
| Form Factor | Benchtop |
| Application Environment | Laboratory |
| Conductivity Range | 0.000 μS/cm to 1000 mS/cm |
| TDS Range | 0.000 mg/L to 1000 g/L |
| Resistivity Range | 5.00 Ω·cm to 100.0 MΩ·cm |
| Salinity Range | 0.00–8.00 % |
| Temperature Range | −10.0–135.0 °C (14.0–275.0 °F) |
| Accuracy | ±0.80 % of Full Scale |
| Minimum Resolution | 0.001 μS/cm (auto-ranging) |
| IP Rating | IP54 |
| Calibration | 1–3 point with auto-recognition of GB-standard KCl solutions |
| Compensation Modes | Non-compensated, Linear (α), Pure Water |
| Auto-Frequency Switching | Yes |
| Interfaces | RS-232, USB |
| Data Storage | 500 datasets per parameter type |
| GLP Compliance | Yes (audit trail, timestamp, operator ID support via software) |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Model | DJS-0.1VTG |
| Conductivity Range | (2–20,000) µS/cm |
| Temperature Range | (0–80) °C |
| Accuracy | ±1.0% FS |
| Minimum Resolution | 0.01 µS/cm |
| Cell Constant | 0.1 cm⁻¹ |
| Probe Material | Borosilicate Glass |
| Connector | 5-pin Aviation Plug |
| Dimensions | Φ12 × 120 mm |
| Application | Lab-based Low-Conductivity Aqueous Solutions |
| Calibration Compatibility | 84 µS/cm and 146.5 µS/cm Standard Solutions |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Instrument Type | Portable |
| Parameter Types | Multi-parameter (pH, ORP, mV, Temperature) |
| pH Measurement Range | –2.00 to 20.00 pH |
| pH Resolution | 0.01 pH |
| pH Accuracy | ±0.02 pH |
| Calibration | Automatic recognition of GB, DIN, NIST, and other standard pH buffer solutions |
| Data Storage | 500 measurement records with GLP-compliant metadata |
| Environmental Rating | IP65 |
| Connectivity | RS232 printer port, USB interface for PC communication and firmware updates |
| Calibration Options | 1–5 point pH calibration, 1-point ORP calibration |
| Measurement Modes | Continuous, equilibrium-based, and programmable timed (interval or continuous timing) |
| User Management | Configurable user ID and sample ID fields |
| Display | Backlit LCD with graphical curve visualization |
| Brand | WTW |
|---|---|
| Origin | Germany |
| Model | Cond 3310 SET 1 |
| Measurement Parameters | Conductivity, Resistivity, TDS, Salinity, Temperature |
| Portability | Handheld (Pen-Style Form Factor) |
| Application Environment | Laboratory & Field |
| Conductivity Range | 0.0–1000 mS/cm |
| TDS Range | 0–1999 mg/L, 0–199.9 g/L |
| Resistivity Range | 0.00–20 MΩ·cm |
| Salinity Range | 0.0–70.0 ppt (based on IOT standard) |
| Temperature Range | –5.0 to 105.0 °C (±0.1 °C accuracy) |
| Accuracy | ±0.5% of reading |
| Brand | SANXIN |
|---|---|
| Origin | Shanghai, China |
| Model | LabSen873 |
| Instrument Type | Pen-Style Electrode |
| Parameter Type | Single-Parameter (pH) |
| Measurement Range | 1–13 pH |
| Resolution | 0.1 pH |
| Accuracy | ±0.1 pH |
| Calibration Buffers | pH 4.00, 7.00, 10.00 |
| Temperature Range | 0–80 °C |
| Body Material | Lead-Free Glass |
| Bulb Shape | Cylindrical |
| Reference System | Ag/AgCl |
| Junction Type | Dual-Liquid Junction with Movable Sleeve |
| Internal Reference Electrolyte | 3 M KCl (Gelled) |
| Salt Bridge Solution | 1 M LiCl |
| Soaking Solution | 3 M KCl |
| Dimensions | Φ12 × 130 mm |
| Connector | BNC |
| Cable | Φ3 mm × 1 m |
| Integrated Temperature Sensor | Yes (for Automatic Temperature Compensation) |
| Brand | SANXIN |
|---|---|
| Origin | Shanghai, China |
| Model | SX650 |
| Portability | Pen-type |
| Application | Laboratory & Field Use |
| Conductivity Range | 0–50.0 mS/cm |
| TDS Range | 0–35.0 g/L |
| Resistivity Range | 0–20.0 MΩ·cm |
| Salinity Range | 0–25.0 ppt |
| Temperature Range | 0–50.0 °C |
| Accuracy | ±1.0% FS (Conductivity), ±0.5 °C (Temperature) |
| Resolution | 0.1 µS/cm |
| Auto-Temperature Compensation | 0–50 °C (2.0%/°C) |
| Calibration | Single-point (1413 µS/cm) |
| Power | Two CR2032 batteries (≥100 h operation) |
| Dimensions | 148 × 29 × 14 mm |
| Weight | 38 g |
| IP Rating | IP57 |
| Certifications | ISO 9001:2000, CE |
| Brand | Hamilton |
|---|---|
| Origin | USA |
| Model | 243632 |
| Instrument Type | Portable |
| Parameter Type | Single-Parameter (pH) |
| Measurement Range | 0–14 pH |
| Resolution | 0.01 pH |
| Accuracy | ±0.02 pH |
| Calibration | Standard pH Buffer Solutions |
| Brand | Sanxin Peirui (SANXIN) |
|---|---|
| Origin | Shanghai, China |
| Instrument Type | Benchtop |
| Parameter Type | Single-parameter (pH/mV/°C) |
| pH Range | -2.000 to 19.999 pH |
| pH Resolution | 0.1 / 0.01 / 0.001 pH |
| mV Resolution | 0.1 mV |
| Temperature Resolution | 0.1 °C |
| pH Accuracy (Meter) | ±0.002 pH |
| (System w/ 2503-C electrode) | ±0.01 pH |
| mV Accuracy | ±0.03% FS |
| Temperature Accuracy | ±0.4 °C (5–60 °C), ±0.8 °C (other ranges) |
| Input Current | ≤1 × 10⁻¹² A |
| Input Impedance | ≥3 × 10¹² Ω |
| Stability | ±0.002 pH / 3 h |
| Temperature Compensation | Automatic or Manual, 0–100 °C |
| Buffer Recognition | 13 standard pH buffers (NIST, DIN, Chinese GB, and custom series) |
| Measurement Modes | Stable Read, Timed Read, Continuous Read |
| Special Modes | High-Purity Water pH, Ammoniated Pure Water pH, ORP (vs. SHE) |
| Data Storage | 600 records (ID, value, temperature, ATC/MTC status, date/time) |
| Interface | RS232 |
| Power | DC 9 V / 300 mA |
| Dimensions | 160 × 190 × 70 mm |
| Weight | 880 g |
| Environmental Rating | IP54 |
| Certifications | ISO 9001:2000, CE, CMC |
| Operating Conditions | 15–30 °C (for 0.001-class performance), ≤75% RH |
| Brand | SANXIN (Sanxin Peri) |
|---|---|
| Origin | Shanghai, China |
| Model | SX811 |
| Instrument Type | Portable |
| Parameter Type | Single-Parameter (pH/mV) |
| Measurement Range | −2.00 to 19.99 pH |
| Resolution | 0.01 pH |
| Accuracy | ±0.01 pH |
| Temperature Compensation Range | 0 to 100 °C (auto/manual) |
| mV Range | −1999 to +1999 mV |
| mV Resolution | 0.1 mV (±200 mV), 1 mV (elsewhere) |
| Input Impedance | ≥1×10¹² Ω |
| Input Current | ≤1×10⁻¹² A |
| Stability | ±0.01 pH/3 h |
| Calibration | 1–3 point auto-calibration with buffer recognition (USA/NIST/CH series), custom buffer support |
| Enclosure Rating | IP57 |
| Power | Rechargeable battery or USB 5 V DC adapter |
| Data Storage | Manual & timed auto-storage |
| Default Buffers | CH-series (pH 4.00, 7.00, 10.01) |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Model | ZDJ-4B |
| Instrument Type | General-purpose Potentiometric Titrator |
| Application Scope | Universal |
| Measurement Range | (0.00–14.00) pH |
| Meter Accuracy | ±0.2% of full scale |
| Meter Resolution | 0.01 pH |
| Titration Accuracy | ±0.3 mV ±1 digit over 3 h |
| Titration Resolution | 1/20,000 for 10 mL burette |
| Brand | Sartorius |
|---|---|
| Origin | Germany |
| Model | LH-723080 |
| Instrument Type | Universal Potentiometric Titrator |
| Application Scope | General-purpose |
| Dispensing Range | 0.1–5 mL |
| Meter Accuracy | ±0.1% FS |
| Meter Resolution | 0.001 mL |
| Titration Accuracy | ≤±0.2% |
| Titration Resolution | 0.001 mL |
| Dispenser Type | Bottle-Top |
| Volume Range | 0–10 mL |
| Chemical Resistance | High (PTFE, FEP, PEEK, borosilicate glass) |
| Sterilization | Autoclavable liquid path (121°C, 20 min) |
| Brand | WTW |
|---|---|
| Origin | Germany |
| Model | SenTix 940 |
| Instrument Type | Portable |
| Parameter Types | Multi-parameter |
| pH Accuracy | ±0.004 |
| pH Range | 0.000–14.000 |
| Calibration Buffers | pH 4.01, 7.00, 10.01 |
| Temperature Range | 0–80 °C |
| Electrolyte | Polymer Gel (KCl-free) |
| Reference Junction | Fiber Junction (NTC integrated) |
| Housing Material | PPE/PS Composite |
| Shaft Length | 120 mm |
| Cable Length | 1.5 m (standard), 3 m (optional) |
| Connector | 4-pin IDS (Intelligent Digital Sensor) |
| Input Impedance | >1 GΩ at 25 °C |
| Response Time (t₉₀) | <15 s (in buffer) |
| Storage Requirement | Wet cap with pH 4 or 7 buffer |
| Brand | SANXIN |
|---|---|
| Origin | Shanghai, China |
| Model | SX711 |
| Instrument Type | Portable (not benchtop — corrected per product reality) |
| Parameter Type | Single-parameter (pH/mV) |
| pH Range | –2.00 to 19.99 pH |
| pH Resolution | 0.1 / 0.01 pH |
| pH Accuracy | ±0.01 pH |
| mV Range | ±1999 mV |
| mV Resolution | 1 mV |
| mV Accuracy | ±0.1% FS |
| Temperature Range | –10 to 110 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.5 °C |
| Input Impedance | ≥1 × 10¹² Ω |
| Input Current | ≤2 × 10⁻¹² A |
| Stability | ±0.01 pH / 3 h |
| Auto-Temperature Compensation (ATC) | 0 to 100 °C |
| Calibration Buffers | Auto-recognized (13 standard buffers across Chinese, NIST, and European series) |
| Memory Capacity | 200 data sets (ID, pH/mV value, unit, temperature) |
| Power | Two AA batteries (1.5 V × 2) |
| Dimensions (meter) | 65 × 120 × 31 mm |
| Weight (meter) | 180 g |
| IP Rating | IP57 |
| Certifications | ISO 9001:2000, CE, CMC |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | L-311 |
| Portability | Portable |
| Intended Use | Laboratory |
| Conductivity Range | 0.000 µS/cm to 200 mS/cm |
| TDS Range | 0 to 100 g/L |
| Resistivity Range | 0 to 10 MΩ·cm |
| Salinity Range | 0 to 80 ppt |
| Temperature Range | −5 to 55 °C |
| Accuracy | ±0.5% FS (conductivity), ±0.1 °C (temperature) |
| Minimum Resolution | 0.01 µS/cm (conductivity), 0.1 °C (temperature) |
| Display | 7-inch color TFT capacitive touchscreen |
| Compliance | IP54 |
| Calibration | Auto-recognition of 8 standard solutions (including ISO and GB standards), single-point or multi-point calibration supported |
| Electrode Constant Options | 0.01, 0.1, 1.0 cm⁻¹ (1.0 cm⁻¹ electrode supplied) |
| Data Management | Statistical analysis (min/max/avg/stdev), storage ≥1000 data points, print-ready output, audit-trail-capable logging, firmware upgradability, power-failure recovery, factory reset |
| Temperature Compensation | Automatic (linear & non-linear NIST/ISO models) and manual modes |
| Language Support | English & Chinese UI |
| Environmental Rating | IP54 |
| Brand | testo |
|---|---|
| Origin | Germany |
| Model | 0563 2062 |
| Instrument Type | Pen-style pH Meter |
| Parameter Types | pH + Temperature (NTC) |
| pH Range | 0–14 pH |
| pH Resolution | 0.01 pH |
| pH Accuracy | ±0.02 pH |
| Temperature Range | 0–+60 °C (short-term up to +80 °C for ≤5 min) |
| Temperature Accuracy | ±0.4 °C |
| Temperature Resolution | 0.1 °C |
| Calibration | 1-, 2-, or 3-point with NIST-traceable buffer solutions |
| Electrode Type | Integrated gel-filled pH electrode with annular transparent reference junction |
| Probe Diameter | 11 mm |
| Probe Sleeve Length | 35 mm |
| IP Rating | IP68 |
| Display | 2-line LCD |
| Power | 1 × CR2032 battery (≈80 h operation) |
| Weight | 115 g (with TopSafe protective sleeve), 65 g (without) |
| Dimensions | 197 × 33 × 20 mm (L×W×H, with probe & sleeve) |
| Housing Material | ABS |
| Operating Temperature | 0–+60 °C |
| Storage Temperature | −20–+70 °C |
| Compliance | CE 2014/30/EU |
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