Is a common gauge of measuring instruments, widely used in various areas of production. The pressure gauge should be selected according to requirements, while meeting the technical requirements should be in line with the principle of comprehensive practical conservation into account, so that a reasonable selection of accuracy class, measuring range, type and model. 
A selected level of precision digital pressure gauge
general level of accuracy for the pressure gauge: 1.0 / 0.4 / 0.2 / 0.1 optional
precision digital pressure gauge precision digital pressure gauge i.e. level of accuracy up to 0.005
Second, digital pressure gauge range selection
when selecting the specific number of the measured pressure gauge: negative / Composite, micro-pressure, a conventional, high pressure, various pressures measured, the price will be different.
It should be noted that:
- When measuring steady pressure, maximum working pressure should not exceed 2/3 of the range.
- When measuring fluctuating pressure, maximum working pressure should not exceed the range of 1/2
- When measuring pressure, the maximum working pressure should not exceed 3/5 scale
4. To ensure measurement accuracy, the minimum working pressure range of not less than 1/3. According to the above principles, in accordance with the maximum pressure calculating a measured value from the pressure gauge range selection slightly greater than the value of the series is the value of the selected range.
Third, the measurement medium
the measurement of different media and to choose different types of environment gauge
1. Water, gas, oil, liquid non-corrosive stainless steel media can meet digital gauge
2. For the special media can communicate better with the manufacturers in the purchase, is achieved by selecting a different core customized solutions, different shell materials and the like
Fourth, with the need for a remote control signal or claim
1. There can be selected digital pressure switch or pressure controller control protection requirements, digital electrical contacts and the like.
2. There remote optional remote digital pressure gauge on demand, remote signal has a 4-20mA or RS485.
3. The need to store data, such as the need to select the recording digital pressure gauge (typically record digital pressure gauge can store 10 million data, connected to the computer via USB, the data derived in real time).
4. Finally, it should clear the supply voltage, threaded connection, the need for explosion-proof, digital pressure gauge dial size is generally not affect the price, this can choose according to actual needs.
如何选择一款价格合理的又匹配工况的产品相信是每一位用户所首先要考虑到的问题，综合以上所述，选择一款合适的数字压力表，需要考虑的压力最大过载、精度、、测量介质、量程、螺纹、供电（一般的智能数字压力表为电池供电）。