Gas Flowmeters
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| Brand | SevenStar |
|---|---|
| Origin | Beijing, China |
| Model | D07-19CM |
| Flow Type | Thermal Mass Flow Measurement |
| Gas Calibration Medium | Nitrogen (N₂) |
| Standard Conditions | 0 °C (273.15 K), 101325 Pa |
| Full-Scale Range (N₂) | 5 SCCM to 20 SLM |
| Control Range | 2–100% F.S. |
| Accuracy | ±1% F.S. (≤10 SLM), ±2% F.S. (>10 SLM) |
| Linearity | ±0.5% F.S. (≤10 SLM), ±2% F.S. (>10 SLM) |
| Repeatability | ±0.2% F.S. |
| Response Time | ≤1.5 s |
| Zero Temp. Coefficient | ≤±0.05% F.S./°C |
| Span Temp. Coefficient | ≤±0.1% F.S./°C |
| Operating Temperature | 5–45 °C |
| Maximum Working Pressure Drop | <0.02 MPa |
| Burst Pressure Rating | 10 MPa |
| Helium Leak Rate | ≤1×10⁻⁹ SCCS |
| Sealing Materials | Fluoroelastomer (FKM), Polytetrafluoroethylene (PTFE), Chloroprene Rubber (CR) |
| Process Connections | VCR 1/4″, φ4 mm / φ6 mm hose, Swagelok 1/8″ / 1/4″, or φ3 mm / φ6 mm tubing |
| Electrical Interface | DB15 male connector |
| EMC Compliance | CE certified |
| Weight | 1 kg |
| Brand | SevenStar |
|---|---|
| Origin | Beijing, China |
| Model | D07-7B |
| Type | Thermal Mass Flow Controller |
| Flow Ranges | 5–10,000 sccm (selectable per unit) |
| Accuracy | ±1.5% FS |
| Repeatability | ±0.2% FS |
| Linearity | ±1.0% FS |
| Response Time (Electrical) | ≤10 s |
| Response Time (Gas) | ≤4 s |
| Operating Temperature | 5–45 °C |
| Maximum Working Pressure | 3 MPa |
| Pressure Drop Range | 0.1–0.5 MPa |
| Seal Materials | Viton (FKM), Neoprene |
| Input/Output Signal | 0–5 V DC (Input Impedance >100 kΩ |
| Power Supply | +15 V / 50 mA, −15 V / 200 mA |
| Electrical Interface | D-Sub 15-pin Female |
| Leak Rate | ≤1×10⁻⁸ atm·cm³/s He (≤1×10⁻⁹ Pa·m³/s He) |
| Standard Fittings | Dual Ferrule (Φ3/Φ6/Φ8 mm, 1/8″/1/4″), VCR 1/4″, φ4×1 & φ6×1 Flexible Tube Ports |
| Weight | 1.1 kg |
| Brand | SevenStar |
|---|---|
| Origin | Beijing, China |
| Model | D07-7C |
| Flow Range (N₂) | 5 SCCM to 10 SLM |
| Control Range | 2–100% F.S. |
| Valve Type | Solenoid-Controlled Proportional Valve (Normally Closed) |
| Accuracy | ±1.5% F.S. |
| Linearity | ±1% F.S. |
| Repeatability | ±0.2% F.S. |
| Electrical Response Time | 10 s |
| Gas Response Time | ≤4 s |
| Operating Temperature | 5–45 °C |
| Operating Pressure Drop | 0.1–0.5 MPa |
| Burst Pressure Rating | 3 MPa |
| Helium Leak Rate | ≤1×10⁻⁸ atm·cm³/s |
| Sealing Materials | Fluoroelastomer (FKM), Chloroprene Rubber (CR) |
| Electrical Connector | DB15 Female |
| Tube Fitting Options | VCR 1/4″, φ4 mm & φ6 mm hose, Swagelok 1/4″, φ3 mm & φ6 mm |
| EMC Compliance | CE |
| Weight | 1.1 kg |
| Brand | SevenStar |
|---|---|
| Origin | Beijing, China |
| Model | D07-7CM |
| Flow Principle | Thermal Mass Flow Measurement (Constant Temperature Anemometry) |
| Gas Medium | N₂-calibrated (standardized at 0 °C, 101.325 kPa) |
| Full-Scale Range | 5 SCCM – 10 SLM (N₂) |
| Control Range | 2–100 % F.S. |
| Accuracy | ±1.5 % F.S. |
| Linearity | ±1 % F.S. |
| Repeatability | ±0.2 % F.S. |
| Response Time | ≤10 s |
| Operating Temperature | 5–45 °C |
| Maximum Pressure Drop | <0.01 MPa |
| Burst Pressure | 3 MPa |
| Helium Leak Rate | ≤1×10⁻⁸ atm·cm³/s |
| Sealing Material | Fluoroelastomer (FKM) or Neoprene |
| Power Supply | +15 V/50 mA, −15 V/50 mA |
| Analog Output | 0–5.00 V DC |
| Electrical Connector | DB15 female |
| Process Connections | VCR 1/4″, Swagelok 1/4″, or φ3/φ4/φ6 stainless steel tubing |
| EMC Compliance | CE certified |
| Weight | 0.92 kg |
| Construction | Tubular bypass design with integrated thermal sensor |
| Brand | SevenStar |
|---|---|
| Origin | Beijing, China |
| Model | D08-1F |
| Power Supply | ±15 V DC / 400 mA, +5.00 V DC / 5 mA |
| Input Voltage Range | 85–260 V AC |
| Max. Power Consumption | 15 W |
| Analog Input Signals | 0–+5 V (voltage), 4–20 mA (current, optional 0–10 mA) |
| Analog Output Signals | 0–+5 V (flow detection), ±15 V (valve control) |
| Display Channels | 1-channel MFC/MFM interface |
| Weight | 1 kg |
| Compliance | CE-certified |
| Type | Volumetric flow display instrument for gas mass flow controllers and meters |
| Brand | SevenStar |
|---|---|
| Origin | Beijing, China |
| Model | D08-8C |
| Type | Volumetric Flow Totalizer |
| Power Supply | 85–265 VAC, 50/60 Hz, 12 W |
| Output Voltages | +15 V @ 200 mA, −15 V @ 400 mA |
| Max. Accumulated Flow | 999999 L or m³ |
| Accumulation Accuracy | < ±0.3% FS |
| Input/Output Signals | 0–+5 V analog (flow detection, setpoint, valve control) |
| Display | Dual digital LCD (instantaneous & cumulative flow) |
| Control Channels | 1-channel MFM/MFC interface |
| Weight | 0.5 kg |
| Enclosure Grounding | Dedicated chassis ground terminal |
| Compliance | CE-marked |
| Origin | Japan |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | MP-W5P |
| Price Range | USD 6,800–13,600 |
| Product Type | Differential Pressure-Based Flowmeter |
| Flow Range | 0.050–5.00 L/min |
| Accuracy | ±5% of set flow or ±5 mL/min (whichever is greater) |
| Cumulative Flow Capacity | 0.0–9999.9 L |
| Timer Range | 0.00–999.59 h:min |
| Power Options | AC adapter (100 V), 6× AA alkaline batteries, or rechargeable Ni-MH battery (NI-W5) |
| Pump Type | Diaphragm |
| Housing Material | Polycarbonate (PC) |
| Operating Environment | 0–40 °C, 10–90% RH (non-condensing) |
| Dimensions | 95 × 56 × 95 mm (W×D×H, excluding protrusions) |
| Weight | 0.45 kg |
| Origin | Japan |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | OFD-1 |
| Price Range | USD 4,200 – 7,000 (est.) |
| Flowmeter Type | Differential Pressure |
| Flow Range | 90–1300 L/min |
| Accuracy | ±3% of measured flow |
| Flow Calculation Method | Differential Pressure (Orifice Plate) |
| Temperature & Barometric Compensation | Integrated sensors with automatic real-time correction |
| Orifice Plate Recognition | Auto-detect (2 standard plates included) |
| Communication Interface | USB (dedicated protocol for HV-R series automatic calibration) |
| Operating Environment | 0–40 °C, 10–90% RH (non-condensing) |
| Dimensions | 105(W) × 225(D) × 180(H) mm |
| Weight | Approx. 2.0 kg |
| Power Supply | 4 × AA alkaline batteries |
| Accessories | 2 orifice plates, 4 × AA batteries |
| 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 |
| Origin | USA |
|---|---|
| Manufacturer Type | Distributor |
| Origin Category | Imported |
| Model | ADP |
| Pricing | Upon Request |
| Velocity Range | ±10 m/s |
| Velocity Resolution | 0.1 cm/s |
| Velocity Accuracy | ±1% of measured velocity or ±0.5 cm/s (whichever is greater) |
| Maximum Ensembles | 100 cells per profile |
| Operating Frequencies | 250 kHz, 500 kHz, 1000 kHz, 1500 kHz, 3000 kHz |
| Max Profiling Range | 3–180 m (frequency-dependent) |
| Power Supply | 12–24 V DC |
| Continuous Power Consumption | 2.0–2.5 W |
| Sleep Mode Power | <1 mW |
| Internal Memory Options | 128 MB / 512 MB / 1024 MB |
| Compass & Tilt Sensor Resolution | 0.1° (heading, pitch, roll) |
| Compass Accuracy | ±2° (heading), ±1° (pitch/roll) |
| Pressure Sensor Options | Strain-gauge (±0.1% FS) or Resonant quartz (±0.01% FS) |
| Transducer Configurations | 3-beam vertical, 2-beam side-looking, 4-beam Janus, 4-beam with vertical beam |
| Software Suite | RiverSurveyor, CurrentSurveyor, CurrentMonitor, ViewADP, SonWave |
| External Sensor Interfaces | CTD (Sea-Bird MicroCAT), Turbidity (D&A OBS), Pressure (Paroscientific quartz) |
| Brand | SonTek |
|---|---|
| Origin | USA |
| Model | ADV |
| Frequency Options | 5 MHz / 10 MHz / 16 MHz |
| Sampling Volume | 0.09–2.0 cm³ |
| Sampling Rate | 0.1–50 Hz |
| Measurement Distance from Transducer | 5–18 cm |
| Velocity Resolution | 0.01 cm/s |
| Velocity Accuracy | ±1% of measured value or ±0.25 cm/s (whichever is greater) |
| Max Operating Depth | 60 m (10/16 MHz), 250 m (5 MHz Delrin), 2000 m (5 MHz Stainless Steel) |
| Power Supply | 12–24 V DC |
| Power Consumption | 2.5–4 W (active), <1 mW (sleep) |
| Probe Configurations | 3D-top-view, 3D-side-view, 3D-upward-view, 2D-side-view |
| Interface | Waterproof connector, splash-proof signal processor |
| Calibration | Factory-performed, stable long-term calibration |
| Compliance | Designed for ASTM D5766, ISO 748, and USGS/USACE hydrodynamic measurement protocols |
| Brand | SonTek |
|---|---|
| Origin | USA |
| Model | Argonaut-SL |
| Product Type | Acoustic Doppler Velocity Profiler |
| Measurement Principle | Broadband Acoustic Doppler Current Profiling (ADCP) with Vertical-Beam Water Level Sensing |
| Velocity Range | ±6 m/s |
| Velocity Resolution | 0.1 cm/s |
| Velocity Accuracy | ±1% of measured velocity or ±0.5 cm/s |
| Water Level Range (SL3000/SL1500/SL500) | 0.1–5 m / 0.15–10 m / 0.2–18 m |
| Water Level Accuracy | ±0.3 cm (depth < 3 m) or ±0.1% (depth ≥ 3 m) |
| Beam Angle (Horizontal/Vertical) | 1.4° / 1.4°, 1.4° / 2.9°, 1.4° / 3.8° |
| Side Lobe Suppression | >60 dB |
| Power Input | 7–15 V DC |
| Power Consumption | 0.5–1.0 W |
| Operating Temperature | –5°C to +60°C |
| Pressure Rating | Up to 30 m water depth |
| Communication | RS-232, SDI-12, optional RS-422 (up to 1500 m), Modbus, 4–20 mA / 0–5 V analog output |
| Memory | 4 MB (≥200,000 samples) |
| Integrated Temperature Sensor | ±0.1°C accuracy, 0.01°C resolution |
| Brand | SonTek |
|---|---|
| Origin | USA |
| Model | Argonaut-SW |
| Measurement Principle | Acoustic Doppler Velocimetry (ADV) with Three-Beam Configuration |
| Velocity Range | ±5 m/s |
| Velocity Accuracy | ±1% of measured value or ±0.5 cm/s |
| Velocity Resolution | 0.1 cm/s |
| Depth Range | 0.2–5.0 m |
| Water Level Accuracy | ±0.1% of measured level or ±0.3 cm |
| Minimum Measurable Depth | 0.2 m total depth (0.1 m above transducer) |
| Operating Temperature | −5°C to +60°C |
| Pressure Rating | 25 m submersion |
| Power Input | 5–15 VDC |
| Power Consumption | 500–700 mW |
| Communication Protocols | RS-232, SDI-12 |
| Onboard Memory | 4 MB (≥50,000 samples) |
| Dimensions | 24.5 × 10.0 × 6.3 cm |
| Weight | 1.2 kg (air), 0.15 kg (water buoyant) |
| Integrated Temperature Sensor | ±0.5°C accuracy, ±0.1°C resolution |
| Flow Calculation | Real-time based on user-defined channel geometry |
| Brand | SonTek |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Pricing | Available Upon Request |
| Measurement Principle | Acoustic Doppler Velocimetry (ADV) |
| Form Factor | Handheld |
| Display | Backlit LCD |
| Memory | 4 MB (up to 64 flow files, 160,000 velocity readings) |
| Probe | 2D point measurement probe with 2 m flexible cable |
| Minimum Measurable Depth | 2 cm |
| Minimum Measurable Velocity | 0.001 m/s |
| Maximum Measurable Velocity | 4.5 m/s |
| Velocity Resolution | 0.1 cm/s |
| Velocity Accuracy | ±1% of measured value |
| Temperature Sensor | Integrated, resolution ±0.1 °C |
| Operating Temperature | −20 °C to +50 °C |
| Storage Temperature | −20 °C to +50 °C |
| Power Supply | 8 × AA batteries (alkaline, NiMH, or NiCd) |
| Battery Life | Up to 25 hours (alkaline) |
| Weight | 1.8 kg |
| Probe Width | 13 cm |
| Water Resistance | IP68 (submersible to 1 m) |
| Communication | RS-232 |
| Remote Sampling Location | 10 cm upstream of transducer |
| Flow Calculation Engine | USGS/ISO-compliant real-time discharge computation |
| Calibration | Factory-calibrated in controlled flume environments per ISO 748 and ASTM D3858 standards |
| Software | FlowTracker PC software for data download, QA/QC, report generation, and compliance documentation |
| Brand | SonTek |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Imported |
| Model | FlowTracker2 |
| Price Range | USD 13,500 – 40,500 (est.) |
| Technology | Acoustic Doppler Velocimetry (ADV) |
| Measurement Type | Point Velocity and Discharge |
| Key Performance | Low-velocity & shallow-water capability |
| Minimum Measurable Depth | 0.02 m |
| Velocity Range | 0.001–4.0 m/s |
| Resolution | 0.0001 m/s |
| Accuracy | ±1% of measured velocity or ±0.0025 m/s (whichever is greater) |
| Operating Temperature (Probe) | −20 °C to +50 °C |
| Operating Temperature (Display Unit) | −20 °C to +60 °C |
| Storage Temperature | −30 °C to +70 °C |
| Power Supply | 8 × AA batteries (alkaline, NiMH, or NiCd) |
| Weight | 1.55 kg |
| Display IP Rating | IP67 (1 m submersion for 30 min) |
| Integrated Sensors | Tilt, orientation, GPS, Bluetooth 4.0 |
| Memory | Non-volatile internal storage |
| Compliance | ISO 748, USGS TWRI 3-A17, ASTM D3858, SmartQC™ real-time quality assurance |
| Brand | SonTek |
|---|---|
| Origin | USA |
| Model | FlowTracker2 |
| Technology | Acoustic Doppler Velocimetry |
| Probe Configurations | 2-beam or 3-beam |
| Output Data Format | CSV |
| Temperature Compensation | Yes |
| Velocity Components | U, V, W (X, Y, Z) |
| Real-time Visualization | Yes |
| Compliance | Designed for ASTM D5118, ISO 748, and GLP-aligned data acquisition workflows |
| Software | FlowTracker2 PC Software (Windows), Firmware-upgradable |
| Power | USB-powered or external 12 V DC |
| Brand | Xylem |
|---|---|
| Origin | USA |
| Model | IQ |
| Measurement Principle | Pulse-Coherent Acoustic Doppler Velocimetry (PC-ADVP) |
| Beam Configuration | 5-beam (4 oblique + 1 vertical) |
| Minimum Measurable Depth | 8 cm |
| Communication Interfaces | Modbus RTU, SDI-12, RS-232 |
| Power Consumption | <1.5 W (typical operational average) |
| Water Level Sensing | Integrated absolute pressure transducer + vertical acoustic beam |
| Channel Geometry Input | Supported via SonTek IQ Software (v3.0+) |
| Compliance | ASTM D5388-22 (Standard Practice for Acoustic Doppler Velocity Measurements in Open Channels), ISO 748:2022 (Liquid flow measurement in open channels — Velocity-area method) |
| Brand | SonTek |
|---|---|
| Origin | USA |
| Model | RiverSurveyor |
| Flow Velocity Range | ±10 m/s |
| Resolution | 0.1 cm/s |
| Accuracy | ±1% of measured velocity or ±0.5 cm/s (whichever is greater) |
| Cells | Up to 100 depth cells |
| Operating Temperature | −5°C to 40°C |
| Storage Temperature | −10°C to 50°C |
| Power Supply | 12–24 V DC |
| Power Consumption (operational) | 2.0–2.5 W |
| Battery Capacity (2× alkaline, 5°C) | 1200 Wh (20–25 h continuous operation) |
| Transducer | 10 cm diameter, triple-beam, titanium housing with epoxy-coated elements |
| Integrated Sensors | Compass, tilt, temperature |
| Interface | Wet-mateable digital signal processor, DGPS-ready, RS-232 serial |
| Cables | 3 m 14-conductor high-frequency power/data cable, 2 m RS-232 cable |
| Software | RiverSurveyor v6.x for Windows (includes audit-trail logging, GLP-compliant data export, and FDA 21 CFR Part 11–ready configuration options) |
| Brand | SonTek |
|---|---|
| Origin | USA |
| Model | RiverSurveyor S5/M9 |
| Velocity Range | ±20 m/s |
| Depth Range | 0.2–15 m (S5), 0.2–80 m (M9) |
| Velocity Resolution | 0.001 m/s |
| Velocity Accuracy | ±0.25% of measured value ± 0.002 m/s |
| Cell Size | 0.02–0.5 m (S5), 0.02–4 m (M9) |
| Number of Cells | up to 128 |
| Transducer Configuration | S5 — five transducers (four 3.0 MHz at 25° tilt, one 1.0 MHz vertical) |
| Depth Accuracy | ±1% |
| Temperature Sensor Accuracy | ±0.1 °C, Resolution: 0.01 °C |
| Compass/Tilt Accuracy | Heading ±2°, Roll/Pitch ±1° |
| Internal Memory | 8 GB |
| Operating Voltage | 12–18 V DC |
| Battery Life | 8 h (standard), 4 h (with RTK GPS) |
| Max Output Rate | 2 Hz |
| Internal Sampling Rate | up to 70 Hz |
| Wireless Options | Bluetooth (60 m smartphone / 200 m laptop), Spread-Spectrum Radio (2000 m) |
| GPS Accuracy | GGA/VTG — 1 m |
| Operating Temperature | –5 to 45 °C |
| Storage Temperature | –10 to 70 °C |
| S5 Dimensions | Ø6.1 cm (top), Ø12.7 cm (bottom), H25.4 cm |
| Weight | 1.1 kg (air), –0.3 kg (water) |
| M9 Dimensions | Ø12.8 cm, H25.2 cm |
| Weight | 2.3 kg (air), –0.6 kg (water) |
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | S5/M9 |
| Pricing | Available Upon Request |
| Operating Temperature | -5°C to 45°C |
| Storage Temperature | -10°C to 70°C |
| Power Supply | 12–18 V DC, rechargeable battery (8 h runtime |
| Memory | 8 GB non-volatile internal storage |
| Max Output Rate | 2 Hz |
| Internal Sampling Rate | up to 70 Hz |
| Velocity Range | ±20 m/s |
| Velocity Accuracy | ±0.25% of measured value |
| Minimum Measurement Distance | 0.06 m |
| Max Depth Range | 80 m (M9) |
| Depth Resolution | 0.01 m |
| Temperature Sensor Resolution | 0.01°C |
| Temperature Accuracy | ±0.1°C |
| Compass/Tilt Range | 360° heading, ±2° heading accuracy, ±1° roll/pitch accuracy |
| RTK GPS Accuracy | 0.03 m horizontal |
| VTG/GGA GPS Accuracy | sub-meter |
| Bluetooth Range | 60 m (mobile), 200 m (laptop) |
| Spread-Spectrum Radio Range | 2000 m |
| Transducer Configurations | Multi-frequency, auto-adaptive cell size, frequency, and sampling mode |
| Brand | SonTek |
|---|---|
| Origin | USA |
| Model | RS5® |
| Measurement Principle | Acoustic Doppler Velocimetry |
| Product Type | River ADCP System |
| Compliance | ASTM D5389, ISO 748, USGS TWRI 3-A12, EPA Method 160.1 |
| Data Output Formats | Excel (.xlsx), MATLAB (.mat), KML/KMZ (Google Earth), CSV |
| Software Platform | RSQ v5.x with SmartPulse+ Processing Engine |
| Deployment Options | Boat-mounted, Cable-suspended, rQPOD Remote-Controlled Floating Platform |
| Beam Configuration | 4-beam Janus, optional 3-beam switching for bank interference mitigation |
| Velocity Range | ±15 m/s (user-configurable), Resolution: 1 mm/s |
| Cell Size | 0.1–2.0 m (adjustable) |
| Maximum Profiling Depth | 50 m (dependent on frequency & water conditions) |
| Operating Frequency | 1500 kHz (standard), optional 600/300 kHz for deeper profiling |
| Brand | Starwood |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | OEM Manufacturer |
| Product Origin | Domestic (China) |
| Model | MBQ Series |
| Pricing | Available Upon Request |
| Full-Scale Range | 10 SCCM to 3,000 SLPM |
| Accuracy | ±0.6% of reading or ±0.1% of full scale (whichever is greater) |
| Repeatability | ±0.1% of full scale |
| Response Time | <10 ms |
| Operating Temperature | –10°C to +60°C |
| Maximum Working Pressure | 320 PSIA (22 barA) |
| Battery Life | 18 hours |
| Gas Selection | 98+ NIST-traceable preloaded gases |
| Custom Gas Mixtures | Up to 5 components |
| Display & Control | Backlit LCD with integrated touchpad |
| Output Options | Integrated dual flow accumulators and alarm outputs (optional) |
| Certifications | NIST-traceable calibration certificate included |
| Brand | TSI |
|---|---|
| Origin | USA |
| Model | 5000 Series |
| Flow Principle | Thermal (Constant Temperature Anemometry) |
| Sensor Element | Platinum-coated Thin-film Sensor |
| Accuracy | ±2% or ±1.5% of reading (selectable) |
| Response Time | 4 ms (bidirectional) |
| Pressure Drop | Low, <100 Pa at full scale |
| Turndown Ratio | 1000:1 |
| Display | 2.8-inch color touchscreen |
| Gas Calibration Options | User-selectable for up to 6 gases |
| Simultaneous Parameters | Mass flow, absolute pressure, temperature, volumetric flow, differential pressure, relative humidity (optional) |
| Data Logging | Optional internal memory or PC-based via USB |
| Software | FLO-Sight PC software (standard) |
| Compliance | NIST-traceable calibration certificate included |
| Environmental Compensation | Temperature & pressure compensation standard |
| Connectivity | USB-C for power, data transfer, and firmware updates |
| Mechanical Interface | Adjustable tube fittings (multiple sizes available) |
| 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 |
| 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 | 4146 / 4046 |
| Calibration Level | Primary (NIOSH-Recognized) |
| Flow Measurement Principle | Critical Orifice (Restriction-Type) |
| Accuracy | ±2% of reading |
| Certifications | NIST-traceable calibration certificate included |
| Power Source | Rechargeable battery |
| Portability | Handheld, lightweight design for field use |
| Compliance | Recognized as a Primary Reference Instrument by NIOSH for personal sampling pump calibration |
| Brand | XiuiLab |
|---|---|
| Origin | Shanghai, China |
| Model | XUZM-101B / XUZM-106B |
| Flow Range Options | 0.1–100 mL/min, 1–1000 mL/min, 2 mL/min–2 L/min, 5 mL/min–5 L/min, 6 mL/min–6 L/min, 30 mL/min–30 L/min, 5 L/min–50 L/min |
| Accuracy | ΔQ < ±1% of reading |
| Repeatability | < 0.5% RSD |
| Minimum Flow Resolution | 0.1 mL/min |
| Timing Resolution | 0.01 s (displayed as 0.1 s) |
| Power Supply | Rechargeable 4.8 V / 700 mAh battery or external 9 V DC adapter |
| Battery Cycle Life | >500 charges |
| Standby Time | >24 h |
| Brand | Xylem |
|---|---|
| Origin | USA |
| Model | FlowTracker ADV |
| Velocity Range | 0.001–4.5 m/s |
| Resolution | 0.0001 m/s |
| Accuracy | ±1% of measured velocity or ±0.0025 m/s (whichever is greater) |
| Operating Temperature | −20 °C to 50 °C |
| Storage Temperature | −20 °C to 50 °C |
| Power | 8 × AA batteries (alkaline, NiMH, or NiCd) |
| Weight | 1.8 kg |
| Probe Width | 13 cm |
| Display Waterproof Rating | IP67 (1 m submersion for 30 min) |
| Memory | Non-volatile |
| Data Files | Up to 20 survey files with water level, rated discharge, timestamps, and user annotations |
| Built-in Temperature Sensor | ±0.1 °C resolution |
| Communication | RS-232 interface |
| Compliance | ISO 748, ISO 10721, USGS TWRI 3-A17, ASTM D5941 |
| Brand | Xylem |
|---|---|
| Origin | USA |
| Model | RiverSurveyor S5/M9 |
| Velocity Measurement Range | ±20 m/s |
| Velocity Resolution | 0.001 m/s |
| Velocity Accuracy | ±0.25% of measured velocity or ±0.002 m/s (whichever is greater) |
| Depth Measurement Range (S5) | 0.2–15 m |
| Depth Measurement Range (M9) | 0.2–80 m |
| Depth Resolution | 0.001 m |
| Depth Accuracy | ±1% of measured depth |
| Cell Size Range | 0.02–4 m |
| Number of Cells | up to 128 |
| Transducer Configuration | S5 — five transducers (four 3.0 MHz at 25° tilt, one 1.0 MHz vertical) |
| Temperature Sensor Accuracy | ±0.1 °C |
| Compass/Tilt Accuracy | Heading ±2°, Roll/Pitch ±1° |
| Memory | 8 GB non-volatile |
| Operating Voltage | 12–18 V DC |
| Battery Life | 8 h (4 h with RTK GPS enabled) |
| Max Output Rate | 2 Hz |
| Internal Sampling Rate | up to 70 Hz |
| Communication | RS232, Bluetooth (60 m to smartphone / 200 m to laptop), spread-spectrum radio (2000 m) |
| GPS Accuracy | sub-meter (GGA/VTG), RTK GPS accuracy: 0.03 m |
| Operating Temperature | –5 °C to +45 °C |
| Storage Temperature | –10 °C to +70 °C |
| S5 Dimensions | Ø6.1 cm (top diameter), Ø12.7 cm (bottom diameter), 25.4 cm height |
| S5 Weight | 1.1 kg (air), –0.3 kg (buoyant in water) |
| M9 Dimensions | Ø12.8 cm, 25.2 cm height |
| M9 Weight | 2.3 kg (air), –0.6 kg (buoyant in water) |
| Brand | YSI |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Category | Imported Instrument |
| Model | FlowTracker2 |
| Price Range | USD 13,500–40,500 (est.) |
| Technology | Acoustic Doppler Velocimetry (ADV) |
| Velocity Range | 0.001–4.0 m/s |
| Resolution | 0.0001 m/s |
| Accuracy | ±1% of measured velocity or ±0.0025 m/s (whichever is greater) |
| Minimum Measurement Depth | 0.02 m |
| Operating Temperature (Probe) | –20 °C to 50 °C |
| Operating Temperature (Display Unit) | –20 °C to 60 °C |
| Storage Temperature | –30 °C to 70 °C |
| Power Supply | 8 × AA batteries (alkaline/NiMH/NiCd), 8–12 V DC |
| Weight | 1.55 kg |
| Display IP Rating | IP67 (1 m submersion for 30 min) |
| Integrated Sensors | Tilt & orientation sensor, GPS receiver, Bluetooth 4.2 LE |
| Display | Color TFT touchscreen, graphical UI |
| Probe–Handle Interchangeability | Yes |
| Data Output | CSV, Excel-compatible, time-series and profile plots |
| Compliance | ISO 748, ISO 10721, USGS TWRI 3-A17, ASTM D5389 |