KDF1200 Portable Doppler Flow Meter
1.Introduction
The ultrasonic Portable Doppler Flow Meter is based on the Doppler effect. The probe sends a beam of ultrasonic waves obliquely upward (or forward). The ultrasonic waves propagate in the fluid. The fluid may contain impurities such as bubbles or particles (it can be considered that the impurities in the fluid have the same speed as the water flow). When the ultrasonic waves come into contact with the impurities in the fluid, the reflected ultrasonic waves will produce a Doppler frequency shift Δf. The Doppler frequency shift Δf is proportional to the flow velocity. The flow velocity of the fluid can be measured by measuring the Doppler frequency shift Δf.
The portable ultrasonic Doppler flow meter is a convenient metering device developed based on field application experience. It follows the principle of simplicity and convenience in assembly, testing, data collation, etc., aiming to provide users with a good experience. The product integrates the corresponding cross-sectional area calculation formula based on various channel types in nature. The instantaneous flow rate can be calculated by the velocity area method, and the cumulative flow rate is calculated based on the cumulative time selected by the user.
2.Feature
- Powered by 2 3.6V rechargeable 18650 lithium batteries
- Low power design, single continuous power supply up to 8 hours, can be used with power bank
- Local cache up to 1 million records, with historical data export function
- USB to Type-C data cable as standard
- Removable and extendable bracket
- 5-inch LCD screen with backlight
- Built-in button battery, automatic RTC clock calibration
- The host can simultaneously mount 2 ultrasonic Doppler flowmeters for comparison testing
- Power display, the main interface can display the power supply power and sensor supply voltage
- Multiple channel types are available, including circular, elliptical, rectangular, trapezoidal, irregular channels
3.Dimension
| Parameter | Specification |
|---|---|
| Power Supply | 3.6V lithium battery power supply range: 3~5VDC; External sensor voltage adjustment range: 10~24VDC; Battery capacity: 3.6V/5200mAH; Total power consumption: 600mAH (can work continuously for 8 hours at 25℃ ambient temperature); |
| Measuring Performance | Flow rate range: 0.03m/s～5m/s; Pressure water depth range: 0.02～10m; Flow rate accuracy: ±(V*1%+0.01)m/s (calibration accuracy of hydrological calibration center); Flow rate accuracy: ±1%～±3% (measurement accuracy varies due to the on-site working environment); Flow rate resolution: 1mm/s; Water depth accuracy: ±3cm; Water depth resolution: 3mm; Temperature resolution: 0.01℃; Instantaneous flow range: 1L/s～720000000m³/h; Instantaneous flow resolution: 0.001 m³/s; Cumulative flow range: 0.1L～34560000000m³; Cumulative flow resolution: 0.001L; Data type: water level, flow rate, temperature, instantaneous flow, cumulative flow; Channel type: circular, rectangular, trapezoidal, irregular channel; |
| Physical Properties | Velocity meter material: POM+(ABS+PC); Handheld device material: ABS; Standard material: 304 stainless steel, standard pole length 2.5 meters (0.5 m * 5); Cable material: PU; Cable length: 4-core (single core 0.21㎡) shielded cable with air guide tube, factory default 10 meters, Wire diameter 8mm; Weight: 8.52kg±0.1kg; Handheld device protection level: IP65; Velocity meter protection level: IP68; |
| Work Environment | Working temperature: -5～60℃ (non-freezing state); Storage temperature: -25～80℃; |
