1. The accuracy of the standard instrument required for pressure transmitter calibration is much higher than the standard instrument accuracy required for pressure gauges.
2. The pressure gauge only needs to verify the relationship between input and output, while the pressure transmitter may need to verify the relationship between the input and the communication data.
3. The standard digital pressure gauge has no output, while the pressure transmitter generally has the analog or digital outputs. There is also another digital pressure gauge UIY9 with 4~20mA output and RS485 communication with high precision.
4. The pressure gauge output is the scale indication. The pressure transmitter is a current or voltage output and must be connected to an ammeter display of the appropriate accuracy level.
The above description is not difficult to see that under the same working conditions, the pressure value measured by the 4-20 mA pressure transmitter UPB13 is more accurate, and the later function expansion is much higher than the pressure gauge.