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| Brand | MesaLabs |
|---|---|
| Origin | USA |
| Model | Defender 520 |
| Flow Principle | Positive Displacement (Dry Piston) |
| Flow Range | L: 5–500 mL/min |
| M | 50–5,000 mL/min |
| H | 300–30,000 mL/min |
| Volume Accuracy | ±1.0% of reading |
| Temperature Measurement | ±0.8 °C (typ.), ±1.3 °C (max) |
| Pressure Measurement | ±3.5 mmHg (typ.), ±7.0 mmHg (max) |
| Units | mL/min, L/min, cc/min, cf/min |
| Interface | RS-232 |
| Compliance | ISO/IEC 17025 accredited calibration, NIST-traceable, NVLAP Lab Code 200661-0 |
| Software | DryCal Pro v5.x (real-time data logging, audit trail, CSV export) |
| Application Scope | Industrial hygiene, occupational health, ambient air monitoring, personal sampling pump calibration |
| Brand | SKC |
|---|---|
| Origin | USA |
| Model | Chek-mate 375 Series |
| Flow Ranges | 5.0–30.0 L/min (High), 0.50–5.0 L/min (Medium), 20–500 mL/min (Low) |
| Accuracy | ±1% of reading within specified ranges, ±2.5% outside |
| Operating Temperature | 0–40 °C |
| Pressure Range | 700–1090 mbar |
| Altitude Limit | up to 3050 m |
| Power | 9 V alkaline battery (≈30 h operation, auto-shutdown after 15 min idle) |
| Weight | ~232–236 g |
| Brand | MesaLabs |
|---|---|
| Origin | USA |
| Model | FlexCal |
| Flow Range | 5 mL/min to 50 L/min |
| Accuracy | ±0.5% of reading |
| Temperature Sensor | Integrated |
| Pressure Sensor | Integrated |
| Flow Units | sL/min, smL/min, scf/min, scc/m, mL/min, L/min, cc/min, cf/min |
| Temp Units | °C, °F |
| Pressure Units | mmHg, PSI, kPa |
| Measurement Interval | 1–15 sec |
| Gas Compatibility | Non-corrosive, non-condensing gases (<70% RH) |
| Flow Mode | Compressed air or vacuum |
| Readout Modes | Single-cycle, continuous, or pulse-averaged (1–100 readings) |
| Power | 6 V rechargeable sealed lead-acid battery (3 h w/ backlight, 8 h w/o) |
| Environmental Operating Range | 0–70 °C, non-condensing |
| Max Absolute Pressure | 15 PSI |
| Display | Backlit LCD graphic display |
| Data Interface | USB port with 1 m cable |
| Enclosure | Pelican™ protective case |
| Compliance | ISO/IEC 17025 traceable calibration |
| Warranty | 1 year (instrument), 6 months (battery) |
| Brand | MesaLabs |
|---|---|
| Origin | USA |
| Model | Defender 510 |
| Flow Range | L: 5–500 mL/min, M: 50–5,000 mL/min, H: 300–30,000 mL/min |
| Volume Flow Accuracy | ±1% of reading |
| Volume Units | mL/min, L/min, cc/min, cf/min |
| Calibration | NIST-traceable, ISO/IEC 17025 accredited (NVLAP Lab Code 200661-0) |
| Interface | RS-232 |
| Software | DryCal Pro |
| Compliance | OSHA Technical Manual referenced method for personal sampling pump calibration |
| Brand | MesaLabs |
|---|---|
| Origin | USA |
| Model | Defender 530+ |
| Flow Principle | Dry Piston Volumetric Displacement |
| Calibration Traceability | NIST-traceable, ISO/IEC 17025 accredited (NVLAP Lab Code 200661-0) |
| Flow Ranges | L: 5–500 mL/min |
| M | 50–5,000 mL/min |
| H | 300–30,000 mL/min |
| Volumetric Accuracy | ±0.75% of reading |
| Standardized Flow Accuracy | ±1.0% of reading |
| Temperature Accuracy | ±0.8 °C (typical), ±1.3 °C (max) |
| Pressure Accuracy | ±3.5 mmHg (typical), ±7.0 mmHg (max) |
| Units | mL/min, L/min, cc/min, cf/min (volumetric) |
| Interface | RS-232 |
| Compliance | OSHA Technical Manual reference, GLP/GMP-ready audit trail support via DryCal Pro software |
| Brand | TSI |
|---|---|
| Origin | USA |
| Model | 4146 |
| Flow Range | 0.01–20 L/min |
| Accuracy | ±2% of reading or ±0.05 STD L/min (whichever is greater) |
| Response Time | 4 ms |
| Dimensions | 127 mm × 50 mm × 32 mm |
| Weight | 0.8 kg |
| Power Supply | 7.5 VDC ±1.5 V, peak current 300 mA |
| Warm-up Time | 1 min |
| Temperature Compensation | Yes |
| Pressure Correction | Yes |
| NIST-Traceable Calibration Certificate | Included |
| NIOSH-Approved Primary Reference Standard | Yes |
| Brand | TSI |
|---|---|
| Origin | USA |
| Model | 4046 |
| Flow Range | 2.5–300 L/min |
| Accuracy | ±2% of reading or ±0.05 STD L/min (whichever is greater) |
| Display | Real-time volumetric flow (temperature- and pressure-compensated) |
| Response Time | 4 ms |
| Dimensions | 183 × 64 × 53 mm |
| Weight | 0.5 kg |
| Power | 7.5 VDC ±1.5 V, peak current 300 mA |
| Warm-up Time | 1 min |
| Calibration | NIST-traceable certificate included |
| Compliance | NIOSH-approved primary calibration reference instrument |
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