Doppler Flow Meter

KH.DPL Doppler Flow Meter for Rivers Channels Reservoirs Pipelines Water Level Flow Measurement

Product Introduction

The KH.DPL Doppler Flow Meter measures flow velocity using the ultrasonic Doppler principle and water level via ultrasonic time difference or static pressure methods. Flow is calculated by configuring the cross-sectional area. The device applies the Doppler effect: frequency differences between transmitted and received signals determine flow velocity, while ultrasonic timing indicates liquid level. Static pressure measurement and temperature compensation improve accuracy for special conditions.

Key Features

Long Life: Waterproof, anti-corrosion, robust construction; IP68 probe suitable for long-term underwater use.
Easy Maintenance: No consumable parts; purely physical measurement requiring no calibration.
High Accuracy: Flow velocity error as low as 1 mm/s; ultrasonic level accuracy 1 mm (within 2 m); unaffected by chemical reagents or liquid viscosity.

Application Scenarios

Rivers, open channels, reservoirs, pipelines
Online monitoring of flow velocity, water level, temperature, instantaneous flow, and accumulated flow
Environmental monitoring and water resource management

Technical Specifications

Parameter	Specification
Flow Rate Range	0~10 m/s, bidirectional
Flow Rate Resolution	0.001 m/s
Flow Rate Accuracy	≤5 m/s: 0.001 m/s; >5 m/s: 0.02 m/s or 0.3% of actual peak velocity (larger value)
Ultrasonic Level Measuring Range	6.5 m
Ultrasonic Liquid Level Accuracy	0.001 m
Ultrasonic Level Resolution	0.0005 m
Static Pressure Level Range	0~10 m
Static Pressure Level Accuracy	±0.1% FS
Static Pressure Level Resolution	0.001 m
Temperature Range	-20~60℃
Sensor Size	165 × 50 × 29.5 mm
Transmitter Size	231 × 185 × 119 mm
Protection Grade	IP68
Power Supply	DC 12V / 24V
Power Consumption	<70 mA during measurement; <25 mA in sleep mode
Communication Interface	RS485, Modbus
Working Temperature	-20~60℃
Lightning / Surge / EMI Protection	Supported