Are there any integrated products for Pitot tube flowmeters? Does a split type necessarily require a calculator?
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This unit uses E+H's Pitot tube flowmeter. Upon arrival, it is found that it is divided into a measuring device, a three-valve group (or a five-valve group), a differential pressure transmitter, a pressure transmitter, a temperature transmitter (the last two are used for temperature and pressure compensation) and a calculator. Now we internally feel that it is too complicated. Can it be integrated like a vortex street? Only one pipe section is enough? The existing E+H calculator has been discontinued. Some of us are considering using only its measuring devices, differential pressure transmitters, pressure transmitters, temperature transmitters (or temperature thermal resistors, not transmitters), and purchasing domestically produced ones. Is this okay?
Pitot tube flowmeters are available in integrated products, but generally speaking, the choice between split type and integrated type depends on the specific application scenario and measurement requirements. The case where a split type requires a calculator is not necessarily required in all scenarios, and it also depends on the specific situation. If you feel that the components of E+H's Pitot tube flowmeter are too complex, you may consider purchasing other brands or models of Pitot tube flowmeters, or using other types of flowmeters such as vortex flowmeters. However, it should be noted that different brands or models of flow meters may have different measurement ranges, accuracy and other characteristics, and the selection needs to be based on the actual situation and needs. If you are replacing a calculator or other components, you should also pay attention to whether the new components are compatible with the original Pitot tube flowmeter to ensure the accuracy of the measurement results. .
Bata flow meters are based on the principle of differential pressure and are primary sensors that measure differential pressure values.； The flow rate is calculated through the differential pressure. The integrator is a secondary transmitter and is used to calculate the flow rate.
Can be replaced with domestic flow totalizer
The Pitot tube flowmeter is a differential pressure flowmeter, which is compensated by other auxiliary instruments to achieve flow volume calculation. There are also a variety of flow meters to choose from for each working condition (technical and economic comparison). At present, domestic flowmeter manufacturers also have many types of flowmeters, and their accuracy can also meet the requirements of custody transfer. Corresponding alternatives can be selected.
. 1. In theory, each meter (component) in the split flow measurement system can be replaced with any product as long as the functions and signals match each other (in practice, the installation form, etc. must be considered)； 2. If temperature and pressure compensation is required for flow measurement, there must be a calculation unit. As for the specific form of this computing unit, it includes but is not limited to calculator ； 3. Pitot tube flowmeters are available in one type. But if you're considering replacing your flow meter, you don't have to limit yourself to the Pitot tube. ； 4. The system composition in the title picture and the drawing method of measuring components are according to the domestic * It should usually be a flute-shaped tube (Annubar). There may be differences in the domestic and foreign names or translation processes (Pitot tube, flute-shaped tube, and "bar" type flowmeters are flowmeters with the same principle, but there are certain differences in specifics). You need to pay attention when changing the flowmeter selection. .
The original model has been discontinued, and new models are now available as replacements. It is recommended to consult your local sales engineer.
Can it be used together with imported measuring sensors and differential pressure transmitters?
Very professional. I would like to ask about item 2, what do you mean by calculation unit? Do you mean that programming formula calculations in DCS or PLC are also considered calculation units, but there is no calculator? Among them, the third one is that our Pitot tubes are all used to measure the wind system, such as the fan outlet and the burner inlet. I haven't thought of anything better yet.
Yes. The calculation unit is not limited to form. Compared with the error between the theoretical value of the measuring system and the actual working conditions, the difference between the results obtained by using the pneumatic multiplier and the large computer can be considered to be small. ； If DCS and PLC do not purchase special software packages, the performance or effect of self-programmed compensation units will vary greatly. When capacity is insufficient or conditions are limited, one of the more reliable methods is to use the flow computer (calculator) supplied by the manufacturer. ； In situations such as fan outlet and burner inlet, flow measurement often does not require "accurate" measurement, as long as it is "reliable" in process operations, so Pitot tubes are a common choice.
Yes, both Rosemount and ABB have multi-parameter transmitters. Temperature and pressure can be integrated together and output a compensated 4~20mA signal to the system side.