For the testing of the measurement process of pressure sensors and flow meters in the metrology institute, leak detectors and flow testers can be used for relevant detection and measurement.

Here are some suggestions and guidelines:
Leak detector: A leak detector is an instrument used to detect the leakage of seals and systems. When testing and measuring pressure sensors, a leak detector can be used to check whether there is any leakage in the sensor and connecting components. By connecting the leak detector to the sensor and related pipelines, leakage tests can be conducted and the leakage rate recorded. Based on the test results, it can be determined whether the sealing performance of the sensor meets the requirements.
2. Flow tester: A flow tester is an instrument used to measure the flow rate of fluids. In the measurement process of the flowmeter, a flow tester can be used to verify the accuracy and precision of the flowmeter. By connecting the flow tester to the flowmeter and related pipelines, flow measurement can be carried out and compared with the readings of the flowmeter. Based on the test results, the performance and accuracy of the flowmeter can be evaluated.