Capacitive Differential Pressure Transmitter

●Adopting microprocessor to improve its flexibility and functions.
●Have strong self-diagnostic capability.
●Wide ranges from 0~100Pa to 42MPa.
●Accuracy better than 0.1%FS or 0.2%FS, rangeability 15:1.
●Zero and span adjustment without mutual influence.
●Have prefect remote setting, local setting as well as adjustment function.
●2-wire system, Hart Protocol.
●Use digital compensation technology to compensate for temperature and system pressure error.
●Good stability, high accuracy, adjustable damping, strong unidirectional overload capacity.
●No mechanical transmission parts, little repair work, strong vibration resistance.
●All general parts, convenient maintenance.
●Optional of diaphragm material (contact medium), explosion-proof.
●Super performance and reliability.
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Product Details

Capacitive Differential Pressure Transmitter


Description of capacitive differential pressure transmitter

UIB3351 capacitive differential pressure transmitters are suitable for the measurement of flow, level and pressure (differential pressure, gauge pressure and absolute pressure), this product has strong adaptability and high reliability, and also has good anti-interference ability and zero stability. Its accuracy reaches 0.1%FS. 3351 can be made with HART Protocol communication, can be communicated with many hand-held communicator like HK- 375 & Rosemount 275 etc.

UIB3351 capacitive differential pressure transmitter is composed of pressure sensor and PCB. The pressure sensor includes sensing element, EEPROM and other parts; PCB includes micro processor, digital/analogue converter, digital communication and memory EEPROM etc, to complete the conversion from pressure signal to 4~20mA DC signal.

UIB3351 series intelligent pressure transmitter includes 8 types:

UIB3351DP differential pressure transmitter

UIB3351HDP high system differential pressure transmitter

UIB3351GP gauge pressure transmitter

UIB3351AP absolute pressure transmitter

UIB3351DP flow transmitter

UIB3351LT level transmitter

UIB3351GP remote pressure transmitter

UIB3351DP remote capacitive differential pressure transmitter

Features of capacitive differential pressure transmitter

●Adopting microprocessor to improve its flexibility and functions

●Have strong self-diagnostic capability

●Wide ranges from 0~100Pa to 42MPa

●Accuracy better than 0.1%FS or 0.2%FS, rangeability 15:1

●Zero and span adjustment without mutual influence

●Have prefect remote setting, local setting as well as adjustment function

●2-wire system, Hart Protocol

●Use digital compensation technology to compensate for temperature and system pressure error

●Good stability, high accuracy, adjustable damping, strong unidirectional overload capacity

●No mechanical transmission parts, little repair work, strong vibration resistance

●All general parts, convenient maintenance

●Optional of diaphragm material (contact medium), explosion-proof

●Super performance and reliability

Specifications of capacitive differential pressure transmitter

Applicationmeasurement of gas ,  liquid or steam
Pressure range0~0.1kPa...40MPa
Accuracy0.1%FS,0.2%FS
Output 2 - wire 4~20mA, and superimposes  conforms to HART Protocol
Rangeability15:1
Power supply12~45V DC, standard 24VDC


Load resistance

the max. allowed load resistance on circuit is determined by power supply;

for HART, 250Ω≤load resistance ≤ 1100Ω

Indicator0~100 linear meter or digital indicator
Stabilitynot exceed the basic error absolute value of the max. range within 12 months
Temperature effect<0.03%FS/10 for GP DP transmitter


System pressure effect

±0.25%FS/10MPa for DP type(can be revised in pipeline pressure);

±0.2%FS/32MPa for HP type,(can be revised in pipeline pressure)

Power supply effectNA
EMI / RFI interference effect20~1000MHz, output drift less than 0.01%FS if field intensity reach 30V/m
Influence of vibrationin arbitrary axis,0.05%FS/g @ 100HZ


Mounting position effect

max. 0.24kPa. When liquid membrane is mounted horizontally, zero drift at most 1.25kPa.

Zero drift can be modified and without any influence for range 

Influence of loadin the power supply range, no load effect


Temperature range

1. ambient temperature:-40~+85℃,-20℃ ~+65( for indicator)

2. medium temperature range: -40~+120℃

3. storge temperature range: -40~+105℃

Relative humidity0~100%RH


Weight

3.5kg( standard configuration without mounting kits,height: 190mm )

electrical connection: M20x1.5 or NPT1/2

Process Connection

1. 1/4NPT Femal   2. connector

Diaphragm material316L, hastelloy-C276, or monel
Vent/drain value316L,hastello-C276,or monel
O-ring materialsnitrile rubber, fluorine rubber, Teflon, metal sealing ring
Electronic shell and coatinglow copper alloy, anodic oxidation, spraying polyurethane
Sensor filling liquidsilicone, fluorosilicone oil
Meter cover and display box10mm toughened glass, nitrile rubber seal
ProtectionIP67
Explosion-proof

intrinsic safety: Exia II Ct6; flame proof:Exd II CT6

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