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| Brand | Geotech (UK) |
|---|---|
| Origin | USA |
| Model | G100/G110/G150 |
| Instrument Type | Portable |
| Detection Target | Multi-component (CO₂, optional O₂) |
| CO₂ Range | 0–20% (G100), 0–100% (G110), 0–10,000 ppm (G150) |
| O₂ Range (optional) | 0–100% |
| CO₂ Accuracy | ±1% FS |
| O₂ Accuracy | ±1.0% FS |
| Resolution | 0.1 ppm (for G150) |
| Repeatability | ±1% |
| Response Time (T90) | ≤20 s (CO₂), ≤60 s (O₂) |
| Zero Drift | <5% FS/yr |
| Span Drift | <1% FS/yr |
| Linearity Error | <2% FS |
| Operating Temperature | 0–50 °C |
| Relative Humidity | 0–95% RH (non-condensing) |
| Pressure Range | 800–1200 mbar |
| Display | 128×64 pixel backlit LCD |
| Data Storage | 1,000 readings + 270 event logs (with optional software) |
| Battery | Rechargeable Li-ion, 12 h typical life (8 h with pump active) |
| Weight | 495 g |
| Dimensions | 165 × 100 × 155 mm |
| Enclosure Material | ABS |
| IP Rating | IP40 |
| Flow Rate | 100 mL/min |
| Measurement Principle | Dual-wavelength non-dispersive infrared (NDIR) for CO₂ |
| Calibration | Factory-calibrated at 20 °C, 1000 mbar |
| Brand | ONUEE |
|---|---|
| Origin | Germany |
| Model | FTC320 |
| Detection Principle | Thermal Conductivity Detection (TCD) |
| Measurement Type | Single-component gas analysis |
| Repeatability | <1% of full-scale range |
| Response Time (T90) | <1 s at 60 L/h |
| Zero Drift | <2% of full-scale range per week |
| Span Drift | <1% of full-scale range |
| Operating Temperature | −20 °C to +50 °C |
| Pressure Rating | 20 bar (absolute) |
| Power Supply | 18–36 V DC / 700 mA |
| Weight | 350 g |
| Dimensions (W×H×D) | 64×40×75 mm |
| Communication Interface | RS232 (TTL-level) |
| Analog Outputs | 2× 0–10 V |
| Enclosure | Unhoused OEM module, IP00, no EMI shielding |
| Compliance | Designed for non-hazardous areas only |
| Software Support | SetApp 2.0 for configuration, calibration and diagnostics |
| Field Calibration | Supported via RS232 |
| Optional Features | Flow measurement, flow monitoring, multi-gas monitoring, corrosion-resistant coating, condensation/dust protection, temperature sensing, external interference compensation |
| Brand | ONUEE |
|---|---|
| Origin | Germany |
| Model | SWH3A |
| Instrument Type | Portable |
| Target Gas | Single-component |
| Minimum Range | 0–20 ppm |
| Repeatability | ±1% F.S. |
| Response Time | T90 < 4 s (at 60 L/h) |
| Zero/Full-Scale Drift | ±2% F.S. |
| Operating Temperature | 0–45 °C |
| Power Supply | 5 V DC |
| Power Consumption | 8 W (single-layer), 15 W (dual-layer) |
| Output Interfaces | RS-232, RS-485, USB, 0–1 V analog, 0(4)–20 mA |
| ADC Resolution | 16-bit |
| Temperature & Pressure Compensation | Integrated automatic compensation |
| Dimensions | 160–290 × 100 × 70–115 mm |
| Compliance | Designed for ASTM D6245, ISO 16000-23, and EN 14625-compliant ambient air monitoring systems |
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