SWP-T20X series economical pressure transmitter Mechanical pressure
sensor
Summary
Swp-t20x series economical pressure transmitter adopts imported
ceramic piezoresistive sensor with international advanced level,
cooperates with high-precision electronic components, and is
assembled through strict process. The dry pressure measurement
technology without intermediate liquid is adopted, which gives full
play to the technical advantages of ceramic resistance sensor, so
that swp-t20x series pressure transmitter has excellent technical
performance. High stability and high measurement accuracy.
Swp-t20x series economical pressure transmitter has a variety of
models, ranges and process connection forms. It can be widely used
in many industrial fields such as petroleum, chemical industry,
electric power, metallurgy, pharmacy, food, etc. it can adapt to
various occasions and media of industrial measurement. It is an
ideal upgrading product of traditional pressure gauge and
traditional pressure transmitter, and an ideal pressure measuring
instrument in the field of industrial automation.
Main features
◆ high stability, better than 0.1% of full scale every year.
◆ small temperature excursion because the intermediate liquid in
the measuring element is eliminated, the sensor not only obtains
high measurement accuracy, but also is less affected by
temperature.
◆ good reliability large scale IC is adopted, with good circuit
reliability and strong anti-interference performance.
◆ wide applicability the product has a variety of models, process
connection forms and manufacturing materials, which can adapt to
various media in industrial measurement.
◆ easy installation and maintenance. The product has reasonable
structure, small volume and light weight. It can be installed
directly at any position.
Working principle
The instrument changes the temperature signal into electrical
signal through the temperature sensor, and then the preamplifier
amplifies and filters the electrical signal, which is sent to the
a/d conversion module of CPU for analog to digital conversion.
Finally, the CPU performs data processing, display and PWM output.
The principle block diagram is as follows:
The pressure of the measured medium directly acts on the ceramic
diaphragm of the sensor, causing the diaphragm to produce a small
displacement proportional to the medium pressure. Under normal
working conditions, the maximum displacement of the diaphragm is
not more than 0.025mm. After the electronic circuit detects this
displacement, it converts this displacement into a standard
industrial measurement signal corresponding to this pressure. In
case of overpressure, the diaphragm is directly attached to the
solid ceramic substrate. Since the gap between the diaphragm and
the substrate is only 0.1mm, the maximum displacement of the
diaphragm in case of overpressure can only be 0.1mm. Therefore, the
structure ensures that the diaphragm will not produce excessive
deformation. The sensor has good stability and high reliability.
Technical parameter
◆ accuracy level: 0.5
◆ return difference 0.1%fs
◆ temperature influence ± 0.1%/10 ℃
◆ working voltage DC 13V ~ 30V
◆ annual stability ± 0.2%
◆ signal output 4 ~ 20mA
◆ allowable overvoltage range 150%
◆ overall dimension 120 × sixty × 100 max
◆ maximum pressure range 200%
◆ allowable temperature medium -20 ~ 70 ℃ environment -20 ~ 80 ℃
| MODEL | CODE | INSTRUCTION |
| SWP-T20X | □ | □□ | □ | □ | □ | □ | □ | Economical pressure transmitter |
| Remote connection mode and material | R G | | | | | | | Outer thread G1/2(SS 1Gr18Ni9Ti)
Outer thread M20×1.5(SS 1Gr18Ni9Ti) |
| Seal material | 1F | | | | | | Fluororubber |
| Signal output mode | 2 | | | | | 4~20mA 2wire |
Enclosure type | A | | | | No field indication for aluminum shell, protection grade IP65 |
Accuracy class | 2 5 9 | | | 0.2
0.5
special requirements |
Measure range | Y | | Nonstandard range |
| Sensor type | R S | Ceramic piezoresistance
Diffused silicon |
| Type | Instruction |
Accuracy class | 0.5 |
Return difference | 0.1%FS |
| Temperature effect | ±0.1%/10℃ |
working voltage | DC13V~30V |
Annual stability | ±0.2% |
| signal output | 4~20mA |
Allowable overvoltage | Range 150% |
| size | 120×60×100max |
Maximum pressure | Range 200% |
Allowable temperature | Environment -20~70℃ environment -20~80℃ |
