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1. Upstream and downstream differentiation of ultrasonic flowmeter preamplifier
Ultrasonic flowmeter calculates flow rate by measuring the time difference between the propagation of sound waves in the forward and backward directions, and its upstream and downstream differentiation is crucial for measurement accuracy. 1. The core distinguishing criteria for the upstream and downstream differentiation of the ultrasonic flowmeter are mainly based on the relative relationship between the sound wave propagation path and the fluid direction: • Upstream sensor: installed in the direction of the fluid source, where the sound wave is first emitted • Downstream sensor: installed in the direction of the fluid direction, receiving the sound wave signal emitted upstream. 2 Specific differentiation method 2.1 Physical installation location identification - View sensor housing identification: Most products will indicate "UPTREAM" (upstream) or "DOWNTREAM" (downstream) - Cable connection identification: Upstream sensors are usually connected to interfaces marked with "UP" or "In" on the host. 2.2 Sound wave propagation time verification: Installation correctness can be verified by measuring the propagation time in two directions: - Forward propagation time: upstream → downstream
rate the fluid at the correct angle parallel to the flow direction Installation precautions - Ensure the requirements for the straight pipe section from the front 10D to the back 5D (D is the diameter of the wheel inspection pipe) - Avoid installing near flow disturbance components such as pumps, valves, elbows, etc. - Sensor and pipeline coupling should be good, without bubbles or gaps - Accurately locate according to the installation distance provided by the manufacturer. After installation, zero point calibration and flow verification should be carried out to ensure measurement accuracy. Incorrect upstream and downstream installation can lead to increased measurement errors or even inability to measure properly.
2. How much does it cost to replace the sensor of an ultrasonic flowmeter?
The cost of replacing the sensor of an ultrasonic flowmeter varies greatly depending on the model and brand, ranging from tens of yuan to tens of thousands of yuan, depending on your device specifications and application scenarios.
. 1. The price range of common sensors varies greatly according to market quotations. Ultrasonic sensors have a wide price range: - Household grade sensors (such as Puen P25-24SA): about 3 yuan/piece - Industrial basic type (such as twin crystal straight probe 2.5P14F20): about 160 yuan/piece - Standard industrial grade (such as Bonner/Turck brands): 900-1500 yuan/piece - High performance special models (such as EDM NRN40 series): up to 8000 yuan or more. 2 Key factors affecting price • Measurement principle: external clip on, plug-in, and pipe segment sensors. Price increases. • Signal type: analog output is 30% -50% more expensive than switch output. • Protection level: IP67 or above. Prot
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