Sewage flowmeter
The fluid measuring instruments used by our company have the characteristics of high precision, high reliability, and long service life. To ensure product quality, our company conducts meticulous research and control at every stage of the product structure, material selection, process formulation, production assembly, and factory delivery, and is equipped with a complete flow calibration and detection system. To meet the needs of the measurement site,

Sewage flow meterThe measurement principle is Faraday's law of electromagnetic induction, and the main components of the sensor are: measuring tube, electrode, excitation coil, iron core, and magnetic yoke housing.Sewage flow meterMainly used to measure the volumetric flow rate of conductive liquids and slurries in closed pipelines. Including highly corrosive liquids such as acids, alkalis, salts, etc.Sewage flow meterWidely used in industries such as petroleum, chemical, metallurgical, textile, food, pharmaceutical, papermaking, as well as environmental protection, municipal management, water conservancy construction, etc.

Integrated intelligent flowmeter
The sensing voltage signal of the sensor is linearly related to the average flow rate, therefore the measurement accuracy is high. The integrated intelligent electromagnetic flowmeter measures the unobstructed flow inside the pipeline, so there is no additional pressure loss; There are no movable parts inside the measuring pipeline, so the sensor has an extremely long lifespan. The integrated intelligent electromagnetic flowmeter requires a shorter straight pipe section, with a length of 5 times the diameter of the pipeline, as the induced voltage signal is formed in the entire space filled with magnetic field and is the average value on the pipeline surface. The sensor part only has the inner lining and electrodes in contact with the measured liquid. As long as the electrode and inner lining materials are selected reasonably, they can be corrosion-resistant and wear-resistant.

Sewage flow meterProduct features:
1. Measurement is not affected by changes in fluid density, viscosity, temperature, pressure, and conductivity;
2. There are no obstructing flow components or pressure loss inside the measuring tube, and the requirements for straight pipe sections are relatively low;
3. Series nominal diameter DN6~DN3000. There are multiple options for sensor lining and electrode materials;
4Sewage flow meterThe converter adopts a novel excitation method, with low power consumption, stable zero point, and high accuracy. The flow range can reach 1500:1;
5. The converter can be integrated or separated from the sensor;
6. The converter adopts a 16 bit high-performance microprocessor, 2x16 LCD display, convenient parameter setting, and reliable programming;
7. For a bidirectional measurement system, it is equipped with three integrators: forward total, reverse total, and difference total; Can display. Zhuang, reverse flow, and have multiple outputs: current, pulse, digital communication HART；
8. The converter adopts surface mount technology (SMT) and has self checking and self diagnostic functions;
1. Nominal diameter (mm): Pipeline PTFE lining: DN10～DN1200； Pipeline type rubber lining: DN40～DN1200；
2. Flow direction: positive, negative, net flow;
3. Range ratio: 150:1;
4Sewage flow meterRepetitive error: ± 0.1% of the measured value;
5. Accuracy level: Pipeline type: 0.5 level, 1.0 level;
6. Temperature of the tested medium: ordinary rubber lining: -20 to+60 ℃; High temperature rubber lining: -20 to+90 ℃; PTFE lining: -30 to+100 ℃; High temperature PTFE lining: - 20～＋180℃；
7Sewage flow meterRated working pressure: DN6－DN80：≤1.6MPa； DN100－DN250：≤1.0MPa； DN300－DN1200：≤0.6MPa；
8. Flow velocity range: 0.1-15m/s;
9. Conductivity range: The conductivity of the measured fluid is ≥ 5 μ s/cm;
10. Current output: 0-10mA: 0-1.5k Ω; 4～20mA：0～750 kΩ；
11. Digital frequency output: The upper limit of the output frequency can be set within 1-5000Hz with a transistor collector open circuit bidirectional output with photoelectric isolation. When the external power supply is ≤ 35V conducting, the maximum collector current is 250mA;
12. Power supply: AC220V, DC24V or 3.6V battery;
13. Requirement for straight pipe length: upstream ≥ 5DN, downstream ≥ 2DN;
14. Connection method: The flowmeter and piping are connected by flanges, and the flange connection size should comply with the provisions of GB11988;
15. Explosion proof grade: mdIIBT4；
16. Protection level: IP65， Specially customized up to IP68;
17. Environmental temperature: - 25～＋60℃；
18. Relative temperature: 5% to 95%;
19. Total power consumption: less than 20W;

Sewage flow meterHow to choose correctly:
The selection of instruments is a very important task in instrument applications. Relevant data shows that 2/3 of instrument failures in practical applications are caused by incorrect selection or installation of instruments. Please pay special attention.
◆ Collect data
1. Composition of the tested fluid
2. Maximum and minimum flow rates
3. Maximum work pressure
4. Maximum and minimum temperatures
The tested fluid must have a certain degree of conductivity, with a conductivity>5 μ S/CM
The maximum and minimum flow rates must comply with the numbers in the following table

Caliber mm	Flow range m3/h	Caliber mm	Flow range m3/h
φ15	0.0636~6.36	φ450	57.23～5722.65
φ20	0.11～11.30	φ500	70.65～7065.00
φ25	0.18～17.66	φ600	101.74～10173.6
φ40	0.45～45.22	φ700	138.47～13847.4
φ50	0.71～70.65	φ800	180.86～18086.4
φ65	1.19～119.4	φ900	228.91～22890.6
φ80	1.81～180.86	φ1000	406.94～40694.4
φ100	2.83～282.60	φ1200	553.90～55389.6
φ150	6.36～635.85	φ1600	723.46～72345.6
φ200	11.3～1130.4	φ1800	915.62～91562.4
φ250	17.66～176.25.	φ2000	1130.4～113040.00
φ300	25.43～2543.40	φ2200	1367.78～136778.4
φ350	34.62～3461.85	φ2400	1627.78～162777.6
φ400	45.22～4521.6	φ2600	1910.38～191037.6

The actual maximum working pressure must be less than the rated working pressure of the flowmeter.
The maximum and minimum operating temperatures must comply with the temperature requirements specified by the flowmeter.
Determine if there is negative pressure present.
You can choose the corresponding electromagnetic flowmeter based on the flow rate in the table above. If the inner diameter of the selected electromagnetic flowmeter does not match the inner diameter of the current process pipeline, it should be shrunk or expanded.
If the pipeline undergoes shrinkage, consideration should be given to whether the pressure loss caused by shrinkage will affect the process flow.
From the perspective of product price, smaller caliber electromagnetic flow meters can be chosen to relatively reduce investment.
When measuring clean water, the economic flow rate is 1.5-3m/s. When measuring solutions that are prone to crystallization, the flow rate should be appropriately increased to 3-4m/s to achieve self-cleaning and prevent adhesion and sedimentation; When measuring abrasive fluids such as slurry, the flow rate should be appropriately reduced to 1.0-2m/s to reduce wear on the lining and electrode. Actual applications rarely exceed 7m/s, and exceeding 10m/s is even rarer.
Correct wiring
① The excitation cable can use YZ medium-sized rubber sheathed cable, which has the same length as the signal cable
② Signal cables and other power cables must be strictly separated and cannot be laid in the same pipe, parallel, or twisted together. They should be separately threaded in steel pipes.
③ The signal cable and excitation cable should be kept as short as possible, and excess cables should not be coiled together. The excess cables should be cut off and re welded. When the cables enter the sensor electrical interface, they should be made U-shaped at the port to prevent rainwater from penetrating into the sensor.
④Sewage flow meterThe connection between the excitation cable and the converter is completed with dedicated wiring, and the converter and external connection are integrated into the electromagnetic flowmeter.

12、 Selection of installation environment:
In order to ensure stable operation of the transmitter, the following requirements should be noted when selecting the installation environment:
1. Try to avoid ferromagnetic objects and specific equipment with strong electromagnetic fields (such as large motors, transformers, etc.) to prevent the magnetic field from affecting the working magnetic field and flow information of the sensor.
2. It should be installed in a dry and ventilated place as much as possible, and should not be installed in damp or water prone areas.
3. Avoid direct sunlight and rain as much as possible, and avoid environments with temperatures above 45 ℃ and relative humidity above 95.9%.
4. Choose a place that is easy to maintain and has convenient activities.
5. The flowmeter should be installed at the rear end of the water pump and must not be installed on the suction side; The valve should be installed on the downstream side of the flowmeter.