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Capacitance Pressure Transducer

time£º2018-10-22 14:24    source£ºshelok pressure transmitter

 Capacitance Pressure Transducer


Capacitance Pressure Transmitter is the result of a combination of self-developed anti-jamming, high stability digital circuits and the introduction of foreign Single crystal resonant silicon sensor technology. Its performance much better than our domestic metal capacitive sensor technology transmitter, and main show in the field zero stability and long-term operation stability, and rapid response.




Single crystal resonant silicon sensor technology

Super performance, use to measure pressure, differential pressure and temperature..

Accuracy: ±0.075%~±0.1%F.S/±0.2%F.S

Stability: ≤0.2%

Standard 4¡«20mA,RS-485 communication interface

Support upgrade of basic scene control technique


Little temperature effect


Little static effect


Overload can reach 2 times





Compatible with 316LSS,noncorrosive liquids.   

Shipping and aviation industry.

Hydraulic pressure and pneumatic control system

Apply in Petroleum industry, chemical industry, electric power, metallurgy, hydrology etc process control.




Technical Data                                                                




Analog output: two –wire 4-20mADC


Digital output: two –wire 4-20mADC and superimposing variable digital signal accord with HART


Power supply


supply voltage 24VDC


Limit load


Max load resistor Rmax in loop decided by the supply voltage, see the below drawing. HART PROTOCOL require the load resistor not less than 250Ω,not more than 600Ω


Communication distance


Max. 1.5Km, multi-address communication can connect 15 smart transmitters Max.




4 digital display,5 digit LCD display, pointer type.




ExiaIICT5;explosion suppression type


Zero offset


Can positive transfer or negative transfer, but can not overstep the utmost value




ambient temperature -40-85¡æ(When choose LCD : -20-70¡æ)


Medium temperature




Static pressure and single side overpressure


3.45KPa(absolute pressure)¡«31.2MPa£¨gauge pressure£©


Relative humidity




Run-up time


less than 5 sec.


Capability change


Less than 0.16cm3


Damp adjust


0.20¡«25 second


Malfunction alarming


If occur malfunction, automatism diagnose function will output 3.9 or 21.0mA


Configuration protection


To avoid the datas are modified random, can utilize software or protect switch lock the record data






Performance Data                                                             


Reference condition


zero is the lower limit and not offset, temperature 25¡æ, Atmospheric pressure, 24VDC power,silicon oil , diaphragm 316L, data adjust range the same as the up and lower limit of the range.










Tem. influence




Static pressure influence


zero error  0.1URL/6.9Mpa; Zero error 0.1URL/1.7MPa


Vibration influence


withstand frequency 200Hz at any direction, arouse error ±0.05%URL


Power influence




Load influence


no load influence


Mounting position influence


about 250Pa zero offset, can be eliminate via calibration, no range influence.


RF interference influence


drift is ±0.1%span in the condition of 30-1000MHz frequency and the most field intensity 10V/m




Configuration parameter                                                       


Wetted material


Diaphragm: 316LSS, Hastelloy , Monel or Tantalum


Vent /drain valve:316LSS, Hastelloy , Monel or Tantalum


Flange and joint : steel coated with cadmiumed ,galvanized steel, 316L SS, Hastelloy


O-ring:  Fluorin rubber


Other material


Filled: silicon oil


Bolt: galvanized steel


Electric housing: low copper and aluminium alloy or SS316


Cover O-ring:  NBR


Coating: polyester epoxy resin


Pressure port


Flange connection: 1/4-18NPT


Joint pressure port£º1/2-14NPT


Electrical connection


Lead tube connection: M20X1.5¡¢1/2-14NPT




5kg£¨no include option parts£©

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