Shulou(Shulou.com)06/02 Report--

Pressure gauge is a common measuring instrument, widely used in various production fields. The selection of pressure gauges shall be based on the requirements of use, on the premise of meeting the technical requirements of the process, comprehensive consideration shall be given to the principle of economy and practicality, and the accuracy grade, range, type and model shall be reasonably selected.

First, the digital pressure gauge accuracy level selection

General pressure gauge accuracy class: 1.0/0.4/0.2/0.1 optional

Precision digital pressure gauges, i.e. high precision digital pressure gauges, have an accuracy rating of 0.005

Second, the selection of digital pressure gauge range

When selecting a digital pressure gauge, it should be clear that the measured pressure is: negative pressure/composite, micro-pressure, conventional, ultra-high pressure, and the measured pressure is different, and the price will be different.

What needs to be noted here is:

When measuring stable pressure, the maximum working pressure shall not exceed 2/3 of the range. When measuring pulsating pressure, the maximum working pressure shall not exceed 1/2 of the range. When measuring high pressure, the maximum working pressure shall not exceed 3/5 of the range.

4. In order to ensure measurement accuracy, the minimum working pressure should not be less than 1/3 of the range. According to the above principle, after calculating a value according to the maximum pressure to be measured, select a value slightly larger than this value from the range series of pressure gauges as the selected range.

III. Measurement medium

Different types of pressure gauges should be selected for measuring different media and use environments

1. Water, gas, oil, liquid on stainless steel non-corrosive medium digital pressure gauge can meet

2. For special media, you can communicate with the manufacturer when purchasing, and realize it by selecting customized solutions such as different cores and different materials.

IV. Whether control or remote signal requirements are required

1. Digital pressure switch or pressure controller, digital electric contact pressure gauge, etc. can be selected when control protection requirements are required.

2. Remote transmission digital pressure gauge can be selected when there are remote transmission requirements, remote transmission signal has 4- 20mA or RS485.

3. Whether it is necessary to store data, if necessary, choose recording digital pressure gauge (recording digital pressure gauge can generally store 10 million data, connect to computer through USB, export data in real time).

4. Finally, it is necessary to clarify the power supply voltage, threaded interface, whether it needs explosion-proof, the dial size of the general digital pressure gauge does not affect the price, this can be purchased according to actual needs.

How to choose a reasonable price and matching conditions of the product is believed to be the first problem to be considered by each user, comprehensive above, choose a suitable digital pressure gauge, need to consider the pressure maximum overload, accuracy, measurement medium, range, thread, power supply (general intelligent digital pressure gauge for battery power supply).

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