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PD-750S Series Diaphragm remote differential pressure transmitter
PD-750S Series Diaphragm remote differential pressure transmitter
PD-750S Series Diaphragm remote differential pressure transmitter
PD-750S Series Diaphragm remote differential pressure transmitter
PD-750S Series Diaphragm remote differential pressure transmitter
PD-750S Series Diaphragm remote differential pressure transmitter

PD-750S Series

Diaphragm remote differential pressure transmitter
The PD-750S diaphragm remote differential pressure transmitter combines a new expanded monocrystal silicon sensing element with HART protocol and temperature compensation technology to convert the differential pressure value into a linear standard current signal. It has a high precision and repeatability, a wide range of measurement, suitable for all kinds of dry gas, toxic gas, corrosive or highly toxic liquid, high temperature viscous or easily crystallized liquid fluid, gas medium differential pressure measurement. And it is equipped with field programming and display functions, information output diversification, to meet the needs of different working conditions.
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Performance Features
Performance characteristics:
The PD-750S diaphragm remote differential pressure transmitter can convert gas, liquid and other physical differential pressure parameters sensed by the pressure element sensor into standard electrical signals (such as 4~20mA, Hart, etc.), which can be used to supply secondary instruments such as alarm device, recorder and regulator for measurement, indication and process adjustment.


Product advantage:

■ Fully sealed, fully isolated monocrystalline silicon pressure sensor, high precision.

■ 24-bit CPU to achieve high precision and fast response, display module can rotate 360°, button parameter operation function is friendly

■ High strength metal electric protective shell to meet the harsh environment application.

■ Innovative design of capillary joint components, so that the capillary is reliable protection, not easy to break in field use.

■ Fully isolated magnetic induction structure, meet the requirements of the field operation specifications.

■ Strong quality stainless steel process flange, super thick reinforced structure is a strong guarantee of high static pressure, high overload


 Field of application:

Widely used in a variety of industrial automatic control environment, involving water conservancy and hydropower, railway traffic, intelligent buildings, production automatic control, aerospace, military, petrochemical, oil Wells, electric power, ships, machine tools, pipelines and other industries.

Technical parameters
Applicable media Dry gas, poisonous gas, highly corrosive or highly toxic liquid, viscous or easily crystallized liquid
Measuring range 1-100pa、6-41000kpa、-1-60MPa
Turndown ratio 1:100
measurement accuracy ±0.075%FS, ±0.1%FS, ±0.2%FS, ±0.5%FS
stability Up to ±0.10% of upper range limit (URL), 60 months
pressure type Gauge pressure, absolute pressure, negative pressure, high static pressure, micro pressure
show LED field display with three isolation buttons
menu adjustment Adjustment via Hart Communicator
input voltage 12-36V DC
output 4-20mA, RS485, Hart, etc.
Operating temperature  -35-125°C
Overload pressure 150%FS
bursting pressure 300%FS
error alarm Self-diagnostic program detects fault, analog output is higher than 20.8mA or lower than 3.8mA, alarm, high/low flag is adjusted by HART communication
ambient temperature


response time <1ms  (10...90%FS)
refresh time 0.25S
service life >1*10^8 pressure cycles
Liquid contact material Stainless Steel 316L, Hastelloy C, Monel, Tantalum
shell material Cast aluminum alloy, stainless steel
Protection class Electrical part IP67
Electrical connections

Terminal connection, M20*1.5 screw hole *2

electrical protection Overload/Reverse Phase Protection
Explosion proof Flameproof ExdIICT6, intrinsic safety ExiaIICT4
Damping constant The electrical damping is 0-32S and can be adjusted at intervals of 0.1S
Installation method GB flange (GB/T 9119-2010)
weight Approx. 4.4kg 
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