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| Brand | AP Buck |
|---|---|
| Origin | USA |
| Manufacturer | AP Buck, Inc. |
| Type | Volumetric Flow Calibrator |
| Model | mini-BUCK M-1 |
| Flow Range | 0.1–300 mL/min |
| Accuracy | ±0.5% of reading |
| Operating Temperature | 0–40 °C |
| Power | Rechargeable 4.8 V NiCd battery (8 h continuous operation) |
| Dimensions | 14 × 15 × 6 cm |
| Weight | 0.9 kg |
| Compliance | NIST-traceable calibration certificate included |
| Display | Backlit LED LCD, sunlight-readable |
| Control | Microprocessor-based, one-button operation |
| Pressure Operation | Measures flow under both positive and negative pressure |
| Latitude/Altitude Independence | No correction required at any elevation or geographic latitude |
| Application | Primary calibration standard for rotameters, sampling pumps, lab flow devices, and volumetric/pressure-driven flow sources |
| Brand | Beifen Sanpu |
|---|---|
| Model | ZM-102B |
| Type | Volumetric Flowmeter |
| Measurement Principle | Soap Film Displacement (Gravimetric-Volumetric Timing) |
| Flow Range | 1–1000 mL/min |
| Accuracy | ±1% of reading |
| Repeatability | <0.5% |
| Volume Resolution | 0.1 mL |
| Time Resolution | 0.01 s (displayed as 0.1 s) |
| Temperature & Pressure Compensation | Built-in sensor-based correction |
| Power | Rechargeable 4.8 V / 700 mAh Li-ion battery (standby >24 h) |
| Dimensions | 90 × 150 × 280 mm |
| Weight | 1.3 kg |
| Compliance | JJG 586–2006 “Verification Regulation for Soap Film Flowmeters” |
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