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| Brand | ERUN |
|---|---|
| Origin | Shaanxi, China |
| Manufacturer Type | Authorized Distributor |
| Country of Manufacture | China |
| Model | ERUN-SP5-D4 |
| Instrument Type | Portable |
| Detection Method | Spectrophotometric (ISO 6703-1 compliant) |
| Measurement Range | 0.01–0.50 mg/L CN⁻ |
| LOD | 0.005 mg/L |
| Accuracy | ±5% FS |
| Repeatability | ≤3% RSD |
| Optical Stability | ΔA < 0.002 in 20 min |
| Display | Backlit LCD |
| Data Storage | 20 calibration curves + 199 timestamped results (YYYY-MM-DD HH:MM:SS, Absorbance, Transmittance, Concentration) |
| Power Supply | 4 × AA batteries |
| Enclosure | IP65-rated ABS housing |
| Dimensions | 80 × 230 × 55 mm |
| Weight | 500 g |
| Operating Temperature | 5–40 °C |
| Relative Humidity | ≤85% RH (non-condensing) |
| Compliance | GB 5749-2022, GB 3838-2002, ISO 6703-1:2018 |
| Brand | ERUN |
|---|---|
| Origin | Shaanxi, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic |
| Model | ERUN-ST7-D4 |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principle | Spectrophotometric Method (ISO 6439, APHA 4500-CN⁻ F/G) |
| Wavelength Selection | Automatic, Dual-Beam Optical System |
| Wavelength Repeatability | ±0.2 nm |
| Photometric Range | 0–3.0 A |
| Light Intensity Control | 16-step Adjustable LED Source |
| Calibration Modes | Linear & Multi-Point Nonlinear (Piecewise) |
| Data Storage Capacity | 100,000 Records with Timestamp, Sample ID, Operator ID, and Calibration Log |
| Data Recovery | Built-in Backup/Restore for Calibration Curves & Measurement History |
| Auto-Reset Function | Factory Reset with Audit-Trail Preserved |
| Power Supply | AC 220 V ±10%, 50 Hz ±1% |
| Operating Environment | 10–35 °C, RH ≤85% (non-condensing), Vibration- and EMI-Shielded Lab |
| Measurement Range | 0.01–0.50 mg/L CN⁻ |
| Accuracy | ±5% of Full Scale |
| Repeatability (RSD) | ≤2% |
| Baseline Drift | <0.002 A/30 min |
| Compliance | Designed to support ISO/IEC 17025 workflows, GLP-compliant data integrity per FDA 21 CFR Part 11 (audit trail enabled) |
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