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| Brand | GOW-MAC |
|---|---|
| Origin | USA |
| Model | GM 902 |
| Detector Options | Electrochemical, Catalytic Bead, NDIR, TCD, PID |
| Measurement Units | ppm, mg/m³, vol%, %LEL, pphm, ppb, mg/L |
| Sampling Method | Integrated diaphragm pump with hydrophobic particulate filter and moisture trap |
| Environmental Rating | Suitable for high-humidity ambient air sampling |
| Brand | GOW-MAC |
|---|---|
| Origin | USA |
| Model | 21070 |
| Detection Principle | Thermal Conductivity Differential Sensing |
| Calibration Traceability | NIST-Traceable Standards |
| Power Supply | 115 V / 230 V AC, 50/60 Hz, 4 W |
| Battery | Rechargeable NiMH, 3.6 V, 1650 mAh |
| Continuous Operation | ~15 hours |
| Charge Time | <60 min to 95% capacity |
| Operating Temperature | 21 °C ± 11 °C (70 °F ± 20 °F) |
| Dimensions | 13.34 × 8.26 × 4.60 cm (L × W × H) |
| Weight | 0.48 kg (instrument only), 0.28 kg (charger) |
| Display | Adjustable-brightness LED bar graph with peak-hold function |
| Pump Type | Diaphragm |
| Sensitivity Range | Low (×1) and High (×100) selectable |
| Response Time Constant & Averaging | User-adjustable |
| Zero Drift Compensation | Manual |
| Audio Alarm | Adjustable threshold and volume |
| Data Retention | Flash memory for user settings |
| Compliance | Designed for industrial leak screening per ASTM E2921 and ISO 10648-2 (qualitative detection) |
| Brand | GOW-MAC |
|---|---|
| Origin | USA |
| Model | 20600 |
| Detection Principle | Thermal Conductivity Detection (TCD) |
| Detector Type | Sealed-reference-cell TCD with four filament elements (rhenium-tungsten, tungsten, nickel) |
| Response Time | <10 s |
| Power Supply | Rechargeable battery or AC adapter |
| Calibration | Dual-range, user-configurable for specific binary gas pairs |
| Sensitivity | Calibratable to 0.5% O₂ in air |
| Display | Integrated LCD showing direct % concentration reading |
| Sample Handling | Integrated diaphragm pump |
| Compliance | Designed for field-deployable industrial process monitoring and leak verification per ASTM D1946 and ISO 8573-5 guidelines |
| Operating Environment | Portable, ruggedized housing for ambient industrial site use |
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