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| Brand | Met One |
|---|---|
| Origin | USA |
| Model | BT-610 |
| Flow Rate | 1.0 cfm (28.3 L/min) |
| Flow Accuracy | ±5% |
| Timing Accuracy | ±10% |
| Repeatability | ±5% |
| Size Channel Resolution | 0.3–10.0 µm (6 calibrated channels at 0.3, 0.5, 1.0, 2.0, 5.0, 10.0 µm) |
| User-Selectable Sizing | 0.3–2.0 µm in 0.1 µm increments |
| Concentration Range | 0–3,000,000 particles/ft³ (0–105,900 particles/m³) |
| Measurement Accuracy | ±10% (per ISO 21501-4 calibration aerosol) |
| Data Storage Capacity | >8,000 sample events |
| Power | Internal 14.8 V Li-ion battery (8 h continuous / 24 h intermittent) |
| Communication Interfaces | RS-232, RS-485, USB, SD card slot |
| Analog Output | 0–5 VDC |
| Environmental Operating Range | 0–40 °C, 10–90% RH (non-condensing) |
| Dimensions (H×W×D) | 22.2 × 17.1 × 21.5 cm (3.67 kg) |
| Compliance | ISO 21501-4, ISO 14644-1, 21 CFR Part 11, CE, ISO 9001 |
| Brand | MET ONE |
|---|---|
| Origin | USA |
| Model | GT-324 |
| Instrument Type | Handheld |
| Flow Rate | 2.83 L/min |
| Flow Accuracy | ±5% |
| Timing Accuracy | ±0.0 s |
| Repeatability | ±5% |
| Size Distribution Accuracy | ±10% |
| Indication Accuracy | ±10% |
| Particle Size Channels | 0.3, 0.5, 0.7, 1.0, 2.5, 5.0, 10.0 µm (selectable 4-channel configuration) |
| Concentration Range | 0–3,000,000 particles/ft³ (0–105,900 particles/L) |
| Data Storage Capacity | 2,200 samples |
| Operating Temperature | 0–50 °C |
| Battery Life | 11 h (Li-ion, 7.2 V) |
| Charging Time | 2.5 h |
| Light Source | 780 nm laser diode, 90 mW |
| Display | 16×2 character LCD |
| Interface | Rotary encoder + membrane keypad |
| Communication | USB |
| Compliance | ISO 21501-4, FDA 21 CFR Part 11 (user access control) |
| Brand | Met One Instruments (USA) |
|---|---|
| Origin | USA |
| Model | MetOne 804 |
| Instrument Type | Handheld |
| Flow Rate | 0.1 cfm (2.83 L/min) |
| Flow Accuracy | ±5% |
| Timing Accuracy | ±0 s |
| Repeatability | ±5% |
| Size Distribution Error | ±10% |
| Indication Error | ±10% |
| Particle Size Channels | 0.3, 0.5, 0.7, 1.0, 2.5, 5.0, 10.0 µm (user-selectable, 4 active simultaneously) |
| Concentration Limit | 1,000,000 particles/ft³ (105,900 particles/L) |
| Light Source | 780 nm laser diode, 30 mW |
| Power Supply | 7.2 V Li-ion rechargeable battery (30 h intermittent / 8 h continuous) |
| Dimensions | 9.5 × 17.2 × 5.1 cm (W × H × D) |
| Weight | 0.60 kg |
| Operating Temperature | 0–50 °C |
| Storage Temperature | −20–60 °C |
| Data Storage | 2,500 records |
| Display | 2-line × 16-character LCD |
| Interface | USB 2.0 |
| Compliance | ASTM F50, ISO 21501-4, ISO 14644-1, CE, JIS B 9921 |
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