How to distinguish between Fuji FKG pressure transmitter and FKC differential pressure transmitter?
Customers often ask, can the transmitter measure pressure and differential pressure? When you encounter someone who doesn't know how to do it, you can only default, and there is no way. The more you talk, the more he doesn't understand. Is there a convenient way? Yes, separate the Fuji FKG pressure transmitter from the FKC differential pressure transmitter, so that the data can be compared. Let's use the comparison method to distinguish the FKG pressure transmitter from the FKC differential pressure transmitter. Its respective principles and characteristics.
First, the principle of distinction
Principle of Fuji FKG pressure transmitter
The two pressures of the measured medium of the FKG pressure transmitter pass into the high and low pressure chambers. The pressure of the low pressure chamber adopts atmospheric pressure or vacuum, which acts on the isolation diaphragms on both sides of the delta element (ie the sensitive element), and passes through the isolation diaphragm. And the filling liquid in the element is sent to both sides of the measuring diaphragm. The pressure transmitter is composed of a measuring diaphragm and electrodes on both sides of the insulating sheet to form a capacitor. When the pressure on both sides is inconsistent, the measuring diaphragm will be displaced, and its displacement is proportional to the pressure difference, so the capacitances on both sides are not equal. Through the oscillation and demodulation links, it is converted into a signal proportional to the pressure.
Fuji FKC Differential Pressure Transmitter Principle
FKC differential pressure transmitter is a transmitter that measures the pressure difference between the two ends of the transmitter, and outputs standard signals (such as 4~20mA, 0~5V). Differential pressure transmitters are different from general pressure transmitters in that they have 2 pressure interfaces. Differential pressure transmitters are generally divided into positive pressure ends and negative pressure ends. Under normal circumstances, differential pressure transmitters have positive pressure The pressure at the end should be greater than the pressure in the negative pressure section to measure.
2. Characteristics distinction
Fuji FKG pressure transmitter features
1. The main features of the pressure transmitter are that it has strong anti-overload and impact resistance, and the overpressure can reach several times the range. Even directly hitting the measuring element with a hard object will not damage it, and it has no effect on the measurement accuracy;
2. High stability, better than 0.1% of full scale every year, this technical index has reached the level of intelligent pressure instrument; the temperature drift is small, because the intermediate liquid in the pressure measuring element is cancelled, so the sensor not only obtains high measurement accuracy , and is minimally affected by the temperature gradient;
3. The pressure transmitter has wide applicability, convenient installation and maintenance, and can be installed in any position.
Fuji FKC Differential Pressure Transmitter Features
1. Super measurement performance for pressure, differential pressure, liquid level, flow measurement
2. Digital accuracy: ±0.065%
3. Simulation accuracy: ±0.065%±0.1%F.S
4. Full performance: ±0.1F.S
5. Stability: 0.1% for 60 months
6. Range ratio: 100:1
7. Measurement rate: 0.2S
8. Miniaturized (5.2kg) all stainless steel flange, easy to install
9. The process connection is compatible with other products for optimal measurement
10. Smart transmitter using 16-bit computer
11. Standard 4-20mA, with digital signal based on HART protocol, remote control
12. Support upgrade to fieldbus and field control-based technology.
3. Summary
It can be seen from the comparison of the above data. The Fuji FKG transmitter mainly measures the pressure in the pipeline, and the Fuji FKC Transmitter mainly measures the positive pressure and negative pressure of the differential pressure.
