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| Brand | Beifen Sanpu |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Manufacturer |
| Country of Origin | Domestic (China) |
| Model | CY-1A |
| Power Supply | DC 9 V |
| Measurement Range | 0–2.5 mg/L |
| Resolution | 0.01 mg/L |
| Repeatability | ≤2% |
| Accuracy | ±5% FS ±1 digit |
| Light Source | Stable LED with auto-control circuit (20-year lifetime) |
| Display | LCD digital display |
| Calibration | Built-in 5-point auto-calibration curve with non-linear correction and data smoothing |
| Data Retention | Non-volatile memory with power-loss protection |
| Battery | Rechargeable lithium battery (2 h charge → 4 h continuous operation) |
| Compliance | GB/T 5750.11–2006 “Standard Methods for Examination of Drinking Water – Disinfectants and Disinfection By-products” |
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