Product Details

1、 Overview of the use of potassium hydroxide remote transmission electromagnetic flowmeter

Potassium hydroxide remote transmission electromagnetic flowmeter is widely used. Large caliber instruments are commonly used in water supply and drainage engineering. Small and medium-sized ports are often used for measuring difficult to measure solid-liquid two-phase fluids or high demand situations, such as measuring pulp and black liquor in the paper industry, slurry in the non-ferrous metallurgy industry, coal slurry in coal preparation plants, strong corrosive liquids in the chemical industry, and controlling and monitoring cooling water in blast furnace tuyere in the steel industry. They are also used for flow measurement and control of hydraulic coal delivery in long interval pipelines. High voltage electromagnetic flowmeter and slurry flowmeter are the first choice for measuring slurry in oil fields, coal preparation plants and other occasions; Small caliber and small caliber are commonly used in hygienic applications such as the pharmaceutical industry, food industry, and biotechnology. The sanitary flowmeter is specially developed by Jiangsu Jinhu Kexin Instrument Co., Ltd. for the pharmaceutical industry, food industry, biotechnology and other industries with hygiene requirements.

2、 Accuracy grade and function of potassium hydroxide remote transmission electromagnetic flowmeter

There are significant differences in the functions of general-purpose potassium hydroxide remote electromagnetic flow meters in the market, with some having high accuracy and multiple functions, while others have low accuracy and simple functions. The fundamental difference between high-precision instruments is (± 0.5% to ± 1%) R, while the difference between low precision instruments is (± 1.5% to ± 2.5%), with a price difference of 1-2 times between the two. Therefore, in situations where measurement accuracy is not very high (such as non-commercial accounting that only aims for control and requires high reliability and excellent repeatability), it is not cost-effective to use high-precision instruments. Some models of instruments claim to have higher accuracy, with a fundamental error of only (± 0.2%~± 0.3%) R. However, there are strict devices that require a reduction in reference conditions, such as temperature ranging from 20 to 22 ℃, and the length of the front and rear straight pipe sections must be distinguished to be greater than 10D or 3D (5D or 2D in general). It is even proposed that the flow sensor should be integrated with the front and rear straight pipes for real flow calibration during flow specification installation to reduce the impact of poor clamping. Therefore, when comparing multiple models, do not simply focus on high targets, but rather read the manufacturer's samples or imitations for comprehensive analysis. The fundamental error of full flow non full tube EMF is (± 1.5%~± 2%) FS. The fundamental error of the piercing type instrument itself (i.e. the detection head) is generally ± 2% R~± 4% FS. Considering that the point flow velocity (or radial flow velocity) represents the uniform flow velocity on the surface, the influence of velocity dispersion coefficient changes caused by fluid quality changes can bring about a 2%~5% transition and smooth area measurement errors, and the overall measurement accuracy is lower. If used for large diameter and long water pipelines, due to superior velocity dispersion (with a sufficiently long front straight pipe section), the electromagnetic flow detection head is calibrated individually in the "calibration tank", and the fluid change is not limited. There is no significant change in velocity dispersion coefficient, and the fundamental error can be close to or slightly greater than ± 2% R.

The functions of flow meters in the market also vary greatly, with only one-way flow being measured

Output imitation signal to drive the rear instrument panel; Multi functional instruments include measuring bidirectional flow, range switching, and upper and lower limit flow

Quantity alarm, air traffic control and power cut-off alarm, small signal removal, flow display and total accumulation, active

Check and self diagnose faults, communicate with the upper computer, and configure activities. Serial digital communication of some models of instruments

Multiple communication interfaces and dedicated chips (ASICs) can be selected for functions to connect with HART negotiation systems, PR0 BuS

Modbus, CONFIG, FF fieldbus, etc.

Lithium battery powered split type integrated plug-in type