The P231 type submersible liquid level transmitter sensor adopts advanced microprocessingtechnology for fully automatic linear error and temperature compensation, ensuring the long-termreliability and quality of the product.The submersible probe is equipped with fully encapsulated anti-condensation technology, a safe and reliable double-sealing structure, full welding process and stainlesssteel housing, ensuring permanent air tighitness. The signal transmission module is equipped with atransient voltage protection circuit, ensuring normal operation in harsh surge voltage environments. Thecable uses specially designed vented cable, allowing the back pressure chamber of the pressure sensingdiaphragm to be well connected to the atmosphere, and the measurement is not affected by changes inextemal atmospheric pressure. The cable seal adopts a reinforced conical plug sealing process, ensuringa long service life even when subjected to significant mechanical loads during installation and long-term use.
It can be widely used for liquid level measurement in water plants, sewage treatment plants, urbanwater supply, high-rise water tanks, wells, geothermal wells, mines, industrial water tanks, oil tanks,hydrogeology, reservoirs, rivers, oceans and other occasions.
Digital intelligent chip,full-temperature linear temperature compensation;
The all-stainless steel laser-welded structure has strong anti-corrosion ability.
No mechanical rotating parts, no mechanical wear, no mechanical failure;
Strong stability, high sensitivity, and good long-term stability.
Simple installation, with multiple installation options.
from that point to the liquid surface, that is:
The static pressure at a certain point in the liquid level is proportional to the distance, that is:P=pxgxh
Where P is the pressure at the measurement point
g is the gravitational acceleration at the place of use.
h represents the height from the measurement point to the liquid surface.
For the determined medium and location to be measured, p and g are constants. Therefore, the change in
the position from the measurement point to the liquid level is only related to the pressure.
Performance parameters
Performance testing standards and benchmark conditions
Testing standard: In accordance with GB/T28474 and IEC60770; from the zero point of the range, the analog signal output is finely adjusted to the set value through the terminal base. This process complies with the verification procedure of pressure transmitters and can provide the corresponding technical standard certificates.
| Accuracy level | 0.1 grade, 0.2 grade, 0.5 grade |
| Environmental temperature affects | The total influence quantity within the range of -20 to 80C is 0.2% FS/10k. |
| Impact of power supply variation | When voltage varies within the range of 9 to 30V, its zero point and the variation of the range does not exceed ±0.005% of the upper limit of the range per volt. |
| Impact of load variation | The variation of zero point and range does not exceed ±0.05% of the upper limit of the range per KΩ. |
| Insulation resistance | ≥ 20 MΩ, 100 VDC under reference conditions |
| Response time | ≤10ms |
| Long-term stability | 0.25% F.S. per year |
| Impact resistance | 0.1% F.S., in compliance with IEC60068-2-27 standard |
| Installation location influence | Installation at any position, with a maximum accuracy error of no more than 400 Pa. |
| Range and zero point | The measurement range and zero point can be adjusted either by local measurement or by HART. Remote adjustment by hand controller. |
Electrical performance indicators
| Output | Two-wire (4~20) mA isolated DC signal superimposed with HART digital signal Signal output can be selected as linear or square root output, with a maximum output current of Not more than 22 mA. |
| Power supply | The commonly used working power supply is 24VDC. When there is no load, the transmitter can be in operation. Operates at 15VDC, with a maximum working power supply of 45VDC, and supports HART communication. (At this time, the power supply range is (18.5~45) VDC.) |
| Load range | The load capacity of a transmitter is related to its power supply. The load resistance RL The relationship with the power supply voltage Vs is as shown in Figure 1. |
| Safety protection | It has strong anti-static shock, surge current and overload protection functions. |
Regional ManagerManager Peng
Contact number86-18030837175
Regional ManagerManager Zeng
Contact number86-18520508508
Regional ManagerManager Jiang
Contact number86-13324545911
Regional ManagerManager Gao
Contact number86-13871508295
Regional ManagerManager Yuan
Contact number86-13711120640
