What is the difference between measuring the pressure difference before and after the dust collector, using two pressure transducers on each side, and using just one pressure difference transmitter?

When measuring the pressure difference before and after the dust collector, there are several differences between using two pressure transmitters to perform subtraction and using a single pressure difference transmitter: 1. System complexity: The approach that involves using two pressure transmitters at each end for subtraction results in a relatively complex system, as it is necessary to process the signals from both transmitters and subtract them from each other in order to obtain the pressure difference； On the other hand, the approach of using a differential pressure transmitter directly results in a simpler system, as only one transmitter is needed to measure the differential pressure. 2. Accuracy: The approach of using a pressure differential transmitter directly results in more accurate measurement of the pressure differential signal ； On the other hand, the approach of using two pressure transmitters and subtracting their readings may result in reduced accuracy of the measurement results due to the accumulation of errors in those two transmitters. 3. Maintenance costs: The setup involving two pressure transmitters requires an additional transmitter, resulting in relatively high maintenance costs ； The approach that uses a differential pressure transmitter results in relatively lower costs and maintenance requirements. 4. Failure rate: The approach of subtracting the readings of the two pressure transmitters involves the risk of failure in either transmitter; if either one fails, the measurement results of the entire system can be affected ； The approach that uses a differential pressure transmitter has a relatively low failure rate. In summary, directly using a differential pressure transmitter to measure the pressure difference before and after the dust collector offers advantages in terms of accuracy, maintenance costs, and failure rate. However, in practical applications, an appropriate measurement method should be selected based on actual requirements and the reliability demands of the equipment. .

If only the pressure difference matters, there is no difference. The former, however, allows one to see the pressure at one end

In terms of achieving the desired results, there is basically no significant difference, but the costs and methods of operation vary. Cost: One differential pressure transmitter with dual capillaries costs around 5k; two pressure transmitters cost 8k–9k. Adding in cables, mounting hardware, installation materials, and labor costs, the latter amount is basically twice that of the former.

That’s right; foreigners consider it standard practice to use a pressure transducer at each end, along with a differential pressure transmitter to measure the pressure difference between those ends. We say that the second transducer can be obtained by subtracting the values from the pressure transducers at the two ends, which means one component is unnecessary in this approach

There’s no such thing as right or wrong here; it depends on the circumstances. If such problems occur frequently in production, or if there may be blockages at the sensor’s sampling port, or if safety experts believe that a different protective layer is needed, or if field operators feel that using both pressure and pressure difference parameters makes it easier to detect issues, then that is also an option. For example: when it’s getting cold, should one wear thermal clothing plus a sweater, or just thermal clothing? Doesn’t it depend on the temperature and an individual’s constitution?