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| Brand | Vientiane Environment |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | OEM/ODM Producer |
| Country of Origin | China |
| Model | WX-QJ2 |
| Price | USD 450 (FOB) |
| Measurement Range | ±90° (X- and Y-axis) |
| Accuracy Options | ±0.001° / ±0.005° / ±0.01° |
| Operating Voltage | 3.7–4.2 V DC |
| Typical Current Draw | <120 mA @ 3.7 V |
| Operating Temperature | −40 °C to +85 °C |
| Operating Humidity | ≤95% RH (non-condensing) |
| Communication Protocols | 2G/4G GPRS, NB-IoT, LoRaWAN |
| Sampling Rate | Configurable from 1 Hz to 50 Hz (high-frequency mode) or 0.00014 Hz to 1 sample/hour (low-frequency mode, interval 1–7200 s) |
| Data Upload Modes | Scheduled transmission + event-triggered upload (e.g., tilt threshold exceedance) |
| Remote Configuration Support | Yes |
| Brand | Vientiane Environment |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | OEM/ODM Producer |
| Country of Origin | China |
| Model | WX-YL4 |
| Price | USD 420 (FOB) |
| Measurement Principle | 24 GHz Continuous-Wave Doppler Radar |
| Output Resolution | 0.1 mm |
| Rainfall Range | 0–200 mm/h |
| Accuracy | ±5% (at wind speed < 5 m/s) |
| Particle Size Detection Range | 0.5–5.0 mm |
| Sampling Interval | 1 s |
| Communication Interfaces | RS-485, RS-232 |
| Protocol | Modbus RTU |
| Power Supply | 12–24 VDC |
| Power Consumption | < 2 W |
| Operating Temperature | −30 °C to +70 °C |
| Operating Humidity | 0–100% RH (non-condensing) |
| Dimensions | Ø82 × 195 mm |
| Housing Material | Anodized Aluminum Alloy + ABS |
| Weight | 0.65 kg (with mounting bracket), 0.38 kg (sensor only) |
| Brand | Vientiane Environment |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Manufacturer |
| Country of Origin | Domestic (China) |
| Model | WX-LDS2 |
| Price | USD 425 (approx.) |
| Measurement Principle | Doppler Effect |
| Frequency Band | 24 GHz |
| Transmit Power | ≤20 dBm (10 mW nominal) |
| Beam Angle | 22° × 8° |
| Speed Range | 1–240 km/h |
| Resolution | 0.1 km/h |
| Accuracy | ±1 km/h |
| Detection Direction | Positive = approaching, Negative = receding |
| Maximum Detection Distance | ≥200 m |
| Angle Compensation | Automatic vertical compensation |
| Charging Voltage Limit | 12.6 V |
| Battery Capacity | 3600 mAh |
| Operating Time | ≥10 hours |
| Housing Material | ABS resin |
| Weight | 504 g |
| Operation Mode | Handheld or tripod-mounted |
| User Interface | Dual-language (English/Chinese) |
| Data Storage | Local history logging with export capability |
| Print Function | Thermal printer support (auto/manual print of up to 3 most recent overspeed events) |
| Overspeed Configuration | Configurable threshold, real-time overspeed ratio [(v − vₗᵢₘ)/vₗᵢₘ], max speed capture, and timestamped event logging |
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