TDS-1000P Open Channel Flow Meter (Portable)

1、 Equipment composition

2、 Equipment principle

portable(handheld)The Doppler ultrasonic open channel flowmeter utilizes the Doppler effect of sound waves propagating in a fluid to measure the velocity of the fluid by measuring the Doppler frequency shift of sound waves scattered by moving particles in the fluid. Combined with a built-in pressure type water level gauge, the flow rate of the liquid can be measured using the velocity area method.

The memory space of the upper computer is as high as16M, can be stored10More than 10000 data points, built-in high-performance lithium battery, capable of continuous operation on a single charge12Over an hour, equipped with a LCD display screen, it can display real-time data such as flow rate, water level, and flow rate.

Average flow velocity measurement:The measurement of flow velocity is obtained by emitting and receiving ultrasonic wave signals through an ultrasonic probe (transducer) and performing corresponding calculation and processing1The transmission frequency isf1The ultrasonic signal is emitted from underwater at a certain angle towards the water surface. When it encounters suspended particles or bubbles in the water, the frequency shifts andf2The frequency is reflected back to the transducer2This is what Doppler will do,f2andf1The difference is the Doppler frequency differencefdLet the fluid flow rate bevThe ultrasonic velocity iscDoppler frequency shiftfdProportional to fluid velocityvThere will be a large number of impurity particles and bubbles in the water, and each reflected particle corresponds to a Doppler frequency shiftfdBy conversion, the flow velocity can be obtained, and the average flow velocity of these large particles is also the average flow velocity of the fluid.

IIIScope of application

Water intake from lakes, reservoirs, and rivers Urban drainage network, rainwater network

agricultural irrigation sewage discharge

Water supply and diversion channels Pollutant discharge from breeding farms and factories

IIIEquipment installation

5、 Characteristics

1Can measure the flow rate of non full pipes (round pipes, egg shaped pipes, or other irregular pipes);

2Measurable channel (circular channel, rectangular channel, or other irregular channel) flow rate;

3It can measure the natural flow of rivers and streams;

4Can measure the flow rate of sewage discharge channels or pipelines (sewers);

5Can provide instantaneous flow values and cumulative flow values;

6The instrument is equipped with a built-in data storage device;

7Sensors can work for a long time in harsh environments and sewage quality;

8Optional SMS orGPRSWireless module enables remote telemetry.

6、 Technical parameters

• Flow rate:

Range: 21mm/s～6000mm/s.

Accuracy: ± for measuring flow velocity1%.

Resolution:1mm/s.

• Temperature:

Range: 0℃～60℃。

Resolution:0.2℃。

• Water level:

Range: 0～10m.

Resolution:1 mm.

Accuracy: ± for measuring water level0.5%.

• Traffic:

Accuracy: ± for measuring flow rate2%.

• Power supply:

Built in rechargeable lithium battery.

• Output interface:

standardRS232TheRS485.

• Data storage capacity:

each1Collect one record per minute, which can be stored for more than6Monthly data.

• Operating temperature:

0℃～60℃ water temperature.

• Shell material:

PCorPVCplastic

• Shell protection level:

IP68.

• Reliability:

MTBF≥25000h.

• Measuring rod length:

4Rice6Rice.