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| Brand | TSI |
|---|---|
| Origin | USA |
| Model | 8530 |
| Aerosol Concentration Range | 0.001–400 mg/m³ |
| Sensor Type | 90° Light Scattering |
| Flow Rate | 1.4–3.0 L/min (factory-set at 3.0 L/min) |
| Resolution | ±0.1% of reading or 0.001 mg/m³ (whichever is greater) |
| Zero Stability | ±0.002 mg/m³ over 24 h (10-s time constant) |
| Particle Size Range | 0.1–10 µm |
| Temperature Coefficient | +0.001 mg/m³/°C |
| Operating Temperature | 0–50 °C |
| Storage Temperature | −20–60 °C |
| Operating Humidity | 0–95% RH (non-condensing) |
| Time Constant | User-selectable, 1–60 s |
| Data Memory | 5 MB (>60,000 data points |
| Display | 3.5-inch VGA color touchscreen |
| Dimensions (H×W×D) | 12.5 × 12.1 × 31.6 cm |
| Weight | 1.3 kg (1.5 kg with battery) |
| Power | 115–240 VAC |
| Communication | USB |
| Compliance | EN 61326-1:2006 (EMC immunity & emissions) |
| Brand | Casella |
|---|---|
| Origin | United Kingdom |
| Model | CEL-712 |
| Measurement Principle | Forward Light Scattering (880 nm Infrared) |
| Safety Rating | Intrinsically Safe (ATEX/IECEx Certified) |
| Measurement Range | 0.001 mg/m³ to 250 g/m³ |
| Resolution | 0.001 mg/m³ |
| Operating Temperature | 0–55 °C (non-condensing) |
| Zero Drift Stability | <2 µg/m³/°C |
| Data Storage Capacity | 86,000 data points |
| Sampling Interval | Adjustable from 1 second to 60 minutes |
| Display | TFT color LCD with real-time trend graphing |
| Power Supply | 3 × AA NiCd rechargeable or alkaline batteries (13 h typical operation) |
| Weight | 0.6 kg (including batteries) |
| Dimensions | 172 × 72 × 33 mm |
| Analog Output | 0–2.5 V DC |
| Communication Interface | Mini-B USB |
| Compliance | Meets ISO 7706:2022 (ambient aerosol monitoring), EN 481 (inhalable fraction), EN 13205 (PM₁₀ and PM₂.₅ sampling conventions), ATEX Directive 2014/34/EU (Category 2G, Zone 1) |
| Brand | Casella |
|---|---|
| Origin | United Kingdom |
| Model | GUARDIAN2 |
| Dust Detection Sensitivity | 1 µg/m³ |
| Zero Stability | ±2 µg/m³ |
| Particle Size Selectors | TSP, PM₁₀, PM₂.₅ |
| Noise Accuracy | IEC 61672-1 Class 1 |
| Noise Metrics | L<sub>Aeq</sub>, L<sub>Amax</sub>, L<sub>A10%</sub>, L<sub>A90%</sub> |
| Noise Range | 20–140 dB RMS |
| Included Acoustic Calibrator | CEL-120/1 |
| Vibration Sensor | Triaxial Geophone |
| Vibration Frequency Range | 2–250 Hz |
| Vibration Resolution | 0.01 mm/s |
| Wind Speed Range | 0–60 m/s |
| Wind Speed Accuracy | ±2% |
| Wind Speed Resolution | 0.01 m/s |
| Wind Direction Range | 0–359° |
| Wind Direction Accuracy | ±3% |
| Wind Direction Resolution | 0.1° |
| VOC Range | 0–6000 ppm |
| VOC Resolution | 0.1 ppm |
| Enclosure Rating | IP65 |
| Operating Humidity | 5–100% RH |
| Data Storage | Internal Flash Memory |
| Communication | GPRS |
| Power Supply | 220–240 VAC or Hybrid Solar/Wind |
| Mounting | Wall or Pole (50 mm diameter) |
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