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| Brand | YSI |
|---|---|
| Origin | USA |
| Model | 4010-1W |
| DO Measurement Range | 0–60 mg/L |
| DO Accuracy | ≤ ±0.2 mg/L |
| DO Repeatability | ≤ ±0.1 mg/L |
| Response Time (90%) | ≤ 30 s |
| Operating Temperature | 0–50 °C |
| Power Supply | AC 100–240 V (wide-range input) |
| Resolution | 0.01 mg/L |
| DO Measurement Principle | Clark-type electrochemical polarographic sensor with integrated stirring |
| Compliance | ASTM D888, ISO 5814, USP <781>, EPA 450/4-85-001, HJ/T 99–2003, GB 11913–89, GB 7488–87 |
| Brand | testo |
|---|---|
| Origin | Germany |
| Model | 0560 4053 |
| Instrument Type | Hot-wire anemometer |
| Resolution | 0.1 m/s |
| Velocity Range | 0–5 m/s (–20 to 0 °C), 0–10 m/s (0 to +50 °C) |
| Volumetric Flow Range | 0–99,990 m³/h |
| Accuracy | ±(0.1 m/s + 5 % of reading) for 0–2 m/s |
| Operating Ambient Temperature | –20 to +50 °C |
| Probe Protection | Rotating protective cap for sensor safeguard during standby |
| Brand | Jilin University & Little Swan |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | GDYS-601SB |
| Quotation | Upon Request |
| Operating Temperature | 0 °C to 40 °C |
| Power Supply | 9 V DC (rechargeable Li-ion battery included) |
| Response Time | 1 s |
| Photometric Stability | ±0.005 Abs/h |
| Optical Wavelengths | 520 nm and 538 nm |
| Absorbance Range | 0.000–2.000 Abs |
| Light Source | High-brightness LED (rated lifetime >100,000 h) |
| Measurement Chamber | Integrated cylindrical sealed cuvette |
| Calibration | Factory-preloaded calibration curves for all target analytes |
| Brand | Hangzhou Aihua |
|---|---|
| Origin | Zhejiang, China |
| Model | AWA4000 |
| Instrument Type | Online Noise Monitoring System |
| Frequency Range | 20 Hz – 12.5 kHz |
| Measurement Range | 25 dB(A) – 140 dB(A) |
| Self-Noise | ≤20 dB(A) |
| Accuracy Class | Compliant with GB/T 3785.1–2023 / IEC 61672-1:2013 Class 1 |
| Measurement Duration | Manual or Automatic (0.1 s – 24 h) |
| Brand | YSI |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Category | Imported Instrument |
| Model | Pro20+ with Integrated Stirring BOD Probe |
| Price Range | USD 1,950–2,030 (est.) |
| Unit Weight | ~0.3 kg (probe body only) |
| Operating Temperature | 0–50 °C |
| Power Supply | Host-powered via cable interface |
| Repeatability | ≤ ±0.1 mg/L DO |
| Response Time | ≤ 30 s (to 90% of final value) |
| DO Range | 0–50 mg/L |
| Atmospheric Pressure Compensation | Built-in barometer (375–825 mmHg) |
| Conductivity Range | 0–200 mS/cm |
| TDS Range | 0–100 g/L (user-selectable conversion factor: 0.3–1.00 |
| Salinity Range | 0–70 ppt (manual or automatic compensation) |
| Temperature Range | −5 to 70 °C |
| DO Resolution | 0.01/0.1 mg/L |
| Pressure Resolution | 0.1 mmHg |
| Conductivity Resolution | 0.001–0.1 mS/cm |
| TDS Resolution | 4-digit display |
| Salinity Resolution | 0.01 ppt |
| Temperature Resolution | 0.1 °C |
| DO Accuracy | ±2% of reading (0–200%), ±6% of reading (200–500%) |
| Pressure Accuracy | ±3 mmHg |
| Conductivity Accuracy | ±0.5% of reading or ±0.001 mS/cm |
| Salinity Accuracy | ±1% of reading or ±0.1 ppt |
| Temperature Accuracy | ±0.2 °C |
| IP Rating | IP67 |
| Drop Test | Certified for 1-meter drop resistance |
| Enclosure Material | Rugged polycarbonate housing with stainless-steel probe guard |
| Connector Type | MIL-spec waterproof quick-disconnect (rated for >300,000 flex cycles) |
| Data Storage | 50 measurement sets |
| Battery Life | ≥400 hours on two AA alkaline cells |
| Certifications | RoHS, CE, WEEE, IP67 |
| Brand | Hangzhou Aihua |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | AWA3000 |
| Instrument Type | Online Noise Monitoring System |
| Frequency Range | 20 Hz – 12.5 kHz |
| Measurement Range | 30 – 130 dB |
| Self-Noise Level | ≤20 dB(A) |
| Accuracy | ±0.5 dB |
| Measurement Duration | Configurable from 1 second to 24-hour continuous logging |
| Brand | Hangzhou Aihua |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | AWA5688 |
| Instrument Type | Handheld Noise Measurement Instrument |
| Frequency Range | 20 Hz – 12.5 kHz |
| Measurement Range | 25 dB(A) – 130 dB(A) |
| Self-Noise | ≤20 dB(A) |
| Accuracy Class | Class 1 per GB/T 3785.1–2010 |
| Measurement Duration Options | Manual trigger or automatic intervals (10 s, 1 min, etc.) |
| Microphone System | 1/2″ pre-polarized condenser microphone (Φ12.7 mm) with AWA14602 preamplifier |
| Reference Sensitivity | −40 dB re 1 V/Pa |
| Linear Dynamic Range | 105 dB (A-weighted) |
| A/D Resolution | 24-bit |
| Sampling Rate | 32 kHz |
| Simultaneous Weightings | A/C/Z frequency + F/S/I time weightings |
| Detector | True RMS digital detection |
| Compliance Standards | GB/T 3785.1–2010 Class 1, IEC 61672–1:2013 Class 1, GB/T 3241–2010 Class 2, IEC 61260–1:2014 Class 2 |
| Display | 2.6″ color TFT LCD, 240 × 320 pixels, auto/manual backlight (46-level adjustment) |
| Brand | testo |
|---|---|
| Origin | Germany |
| Model | 0560 1410 |
| Instrument Type | Vane Anemometer |
| Resolution | 0.1 m/s |
| Measurement Range | 0.4–30 m/s |
| Accuracy | ±(0.2 m/s + 2 % of reading) (0.4–20 m/s) |
| Operating Temperature | −20 to +50 °C |
| Temperature Measurement Range | −20 to +60 °C |
| Temperature Accuracy | ±0.5 °C |
| Temperature Resolution | 0.1 °C |
| Impeller Diameter | 30 mm |
| Weight | 117.8 g |
| Dimensions | 154 × 43 × 21 mm |
| Battery | 3 × AAA rechargeable |
| Battery Life | up to 130 h |
| Enclosure Material | High-strength plastic |
| Connectivity | Bluetooth 4.0 |
| Compatible OS | iOS 11.0+, Android 6.0+ |
| Brand | Jilin University & Little Swan |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | GDYS-302S |
| Weight | 1.7 kg |
| Operating Temperature | 5–40 °C |
| Power Supply | AC 220 V ± 22 V, 50 Hz ± 1 Hz |
| Repeatability | ±5% |
| Accuracy (Measurement Error) | ±5% |
| Light Source | High-brightness LED |
| Wavelengths | 430 nm, 538 nm |
| Absorbance Range | 0.000–2.000 Abs |
| Absorbance Stability | ≤0.005 Abs/h |
| Detector | Integrated Photodiode Sensor |
| Sample Cell | Cylindrical Glass Cuvette, 16 mm Inner Diameter |
| Display | 4.7-inch TFT LCD with Chinese UI |
| Data Interface | USB + RS-232 (COM) |
| Battery | Rechargeable Li-ion, 7.4 V / 900 mAh |
| Power Consumption | 5 W |
| Brand | Hangzhou Aihua |
|---|---|
| Origin | Zhejiang, China |
| Model | AWA5636-1 |
| Instrument Type | Class 2 Sound Level Meter |
| Frequency Range | 20 Hz – 12.5 kHz |
| Measurement Range | 40 dB(A) – 130 dB(A) |
| Self-Noise | <33 dB(A) |
| Compliance | GB/T 3785.1–2010 / IEC 61672-1:2013 Class 2 |
| Display | 128×64 dot-matrix OLED |
| Power Supply | 4 × AAA alkaline batteries (≥12 h operation) |
| Operating Temperature | −10 °C to +50 °C |
| Output Interfaces | AC/DC/PWM output |
| Measurement Parameters | L<sub>p</sub>, L<sub>max</sub>, L<sub>eq,T</sub>, L<sub>min</sub>, SEL, E, T<sub>m</sub> |
| Brand | Hangzhou Aihua |
|---|---|
| Origin | Zhejiang, China |
| Model | AWA6292 |
| Frequency Range | 10 Hz–20 kHz |
| Measurement Range | 20 dB(A)–143 dB(A) |
| Self-Noise | ≤22 dB(A) |
| Accuracy Class | Class 1 (IEC 61672-1:2013) |
| Measurement Durations | 10 s, 1 min, 5 min, 24 h continuous |
| Display | 4.3″ capacitive touchscreen |
| Storage | 16 GB internal + microSD expansion up to 64 GB |
| Connectivity | 4G LTE, Wi-Fi 802.11 b/g/n, Bluetooth 5.0, USB-C, RS-232 serial |
| Protection Rating | IP65 (instrument body, excluding microphone) |
| Battery | 10,000 mAh Li-ion, 20 W fast charging (2 h → 24 h operation) |
| Operating Temperature | −20 °C to +60 °C |
| Dimensions | 288 × 95 × 40 mm |
| Weight | 500 g |
| Brand | testo |
|---|---|
| Origin | Germany |
| Model | 460 |
| Weight | ~150 g |
| Operating Temperature | 0–50 °C |
| Power Supply | 3 V (CR2032 battery) |
| Repeatability | ±0.05 % |
| Response Time | ≤0.5 s |
| Measurement Accuracy | ±0.05 % of reading |
| Measurement Range (Optical) | 100–29,999 rpm |
| Resolution | 0.1 rpm (100–999.9 rpm), 1 rpm (1000–29,999 rpm) |
| Measurement Distance | 10–40 cm |
| Units | rpm or rps |
| Hold Function | Yes |
| Backlit Display | Yes |
| Included Accessories | Reflective tape, protective cap, wrist strap, CR2032 battery, calibration certificate |
| Brand | Jilin University & Little Swan |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | GDYS-501SC |
| Power Supply | 9 V DC (alkaline or rechargeable battery) |
| Operating Temperature | 0 °C to 40 °C |
| Optical Wavelengths | 520 nm and 538 nm |
| Photometric Range | 0.000–2.000 Abs |
| Photometric Stability | ±0.005 Abs/h |
| Measurement Principle | Fixed-wavelength colorimetry with integrated optical path |
| Sample Vessel | Cylindrical sealed cuvette (direct measurement post-reaction) |
| Preloaded Calibration Curves | Yes, factory-calibrated for target analytes |
| Reagent Format | Dry-powder or liquid-stabilized prepackaged reagents |
| Compliance | Designed to support ASTM D1292 (pH), ASTM D3867 (nitrite-N), ASTM D1688 (ammonia-N), ISO 5815-1 (dissolved oxygen), and GB/T 5750.5–2023 (Chinese national standards for drinking water quality) |
| Brand | Jilin University & Little Swan |
|---|---|
| Model | GDYS-104SI |
| Origin | Shanghai, China |
| Instrument Type | Benchtop Photometric Analyzer for Bromate (BrO₃⁻) |
| Measurement Principle | LED-based Absorption Spectrophotometry at 528 nm |
| Detection Limit | 0.004 mg/L |
| Range | 0.000–0.040 mg/L |
| Accuracy | ±0.002 mg/L |
| Repeatability | ±0.002 mg/L |
| Response Time | <20 min per sample |
| Operating Temperature | 5–40 °C |
| Power Supply | AC 220 V ±22 V, 50 Hz ±1 Hz |
| Dimensions | 470 × 280 × 180 mm |
| Weight | 3.8 kg |
| Sample Throughput | Up to 8 samples per batch with integrated pre-concentration and filtration |
| Optical Path | Extended-path cuvette design for enhanced sensitivity |
| Data Interfaces | USB 2.0 and RS-232 |
| Compliance | Designed for routine QC in bottled water production per GB 8537–2018 and aligned with ISO 10523:2022 (water quality — determination of pH) and AOAC Official Method 2015.01 (bromate in drinking water) |
| Brand | JiDa Little Swan |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | GDYS-501M |
| Unit Weight | 1.7 kg |
| Operating Temperature | 5–40 °C |
| Power Supply | AC 220 V ± 22 V, 50 Hz ± 1 Hz |
| Repeatability | ±5% |
| Measurement Accuracy | ±5% |
| Optical Range | 0.000–2.000 Abs |
| Wavelength Options | 380 / 430 / 470 / 520 / 538 / 595 / 630 nm (configurable per parameter selection) |
| Light Source | High-brightness LED (rated lifetime >100,000 h) |
| Detector | Integrated photodiode sensor |
| Sample Cell | 16-mm-diameter cylindrical glass cuvette and 5-cm rectangular glass cuvette |
| Display | 4.7-inch LCD with Chinese interface |
| Data Interface | USB + RS-232 (COM) |
| Battery | Built-in rechargeable Li-ion, 7.4 V / 900 mAh |
| Power Consumption | 5 W |
| Stability | ≤0.005 Abs/h |
| Brand | SANXIN Peri |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic Instrument |
| Model | WS200 |
| Quotation | Upon Request |
| Net Weight | ~500 g (portable) |
| Operating Temperature | 0–80 °C (fluoride measurement) |
| Power Supply | 4 × 1.5 V AA batteries or optional external DC adapter |
| Repeatability | pH ≤ ±0.01 pH |
| Response Time | ≤5 s |
| Accuracy | pH ±0.01 pH |
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