A gauge pressure (GP) transmitter,

gauge pressure transducer,

also called gage pressure transmitter,

compares a process pressure against local ambient air pressure.

SI1151 Advanced Transmitter Gauge Pressure Transmitters,

are used to measure the pressure of gases, liquids,

and steam, as well as to measure tank pressure and fluid levels.

Sino-Instrument 1151 Gauge Pressure Transmitters,

are high-performance cost effective devices used,

where long term accuracy and reliability is a priority.

We also offer Gauge Pressure Transmitter SMT3151 TGP, for the process, oil and gas industry.

Features of 1151GP gauge pressure transmitter

  • High-reliability micro-capacitance silicon cell
  • Long Term stability: +/- 0.1% URL / 10 Years
  • High accuracy, up to +/-0.04% of calibrated span (0.065% as standard)
  • Versatile indicator with push-button programming
  • Exceptional resistance to harsh environments
  • Hart® 5.2 multi-drop communication
  • Field repair possible with common spare parts
  • The built-in loop calibration facility
  • Large installed base
  • Exia “Intrinsically safe” or Exd “Explosion proof” versions ex stock
  • SIL2 (EN61508)

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Specifications of 1151 gage pressure(GP) transmitter

1151GP- 71G

Measurement span17.5 to 3500 kPa0.7 to 14 MPa0.7 to 42 MPa
Setting range-100 to 3500 kPa-0.1 to 14 MPa-0.1 to 42 MPa
Reference accuracy
(Varies by material and measurement span)
Fill fluidSilicone oil (general purpose models), fluorine oil (oxygen and chlorine models)
Waterproof and dust-proof constructionIEC IP66/IP67
Explosion-proof constructionTIIS flameproof (Exd IICT4)
KOSHA flameproof
FM explosion proof, intrinsic safe and Nonincendive
ATEX/NEPSI/IECEx flameproof, intrinsic safe and Type n
INMETRO flameproof
Wetted materialSUS316 (diaphragm SUS316L), Hastelloy C, Tantalum
Power17.9 to 42V DC
Output signal4 to 20 mA DC (SFN communication)
4 to 20 mA DC (HART® communication)
Process connectionsRc 1/2 or 1/2 NPT internal thread
Safety certificationSafety Integrity Level (SIL) 2 certification

You may like: Diaphragm Seal Pressure/ Differential Pressure Transmitters

SMT3151 Diaphragm Seal Pressure transmitter

Gauge pressure transmitter working principle

What is gauge pressure?

Gauge pressure, also known as ‘relative pressure’ or ‘vented gauge pressure’,

is the measurement of pressure relative to the current atmospheric or barometric pressure.

A gauge pressure sensor has the back of the sensing element open (or ‘vented’),

to provide a reference to atmospheric pressure.

More about the Difference between absolute, gage and differential pressure

What is the principle of a gauge pressure transmitter?

A gauge pressure (GP) transmitter compares a process pressure against local ambient air pressure.

Gauge pressure transmitters have ports to sample the ambient air pressure in real-time.

Today’s highly accurate gauge pressure transmitters can be affected by fluctuations in the local ambient pressure.

Measurements above the ambient air pressure are represented as a positive number,

while a negative number represents measurements below ambient.

A gauge pressure measurement is indicated by the letter ‘g’,

following the unit of measure of the reading (i.e., inH₂O(g) or psig).

Application of gauge pressure transducer:

Pressure transmitters are used to measure the level, density, and pressure of liquids,

gases or vapors and then converted to a 4-20 mA DC signal output.

The SI1151/3051/3351GP intelligent pressure transmitter

can communicate with the HART Communicator to set,

monitor or form an on-site monitoring system with the host computer.

Example Industrial Applications:

Open tank level, Line pressure, and Blanket pressure in a tank.

Sino-Instrument Gauge Pressure Transmitters,

made in China,

are high-performance cost-effective devices,

used where long term accuracy and reliability is a priority.

Designed for Harsh Environments:

Sino-Instrument pressure transmitters use a silicon micro-capacitance cell,

proven on hundreds of difficult applications.

They are installed in harsh environments on oil pipelines,

power stations, gas compressor stations,

water treatment plants and steel plants. 

They are equally suited to applications in chemical,

biochemical, food, beverage and water treatment processes.

They have European, American, Russian and Chinese approvals.

Field repair is possible using only one amplifier for all pressure transmitter types.

1151 gage pressure transmitter
1151 gage pressure transmitter

Application Flexibility:

Applications in HVAC, water treatment, food,

paper, pharmaceutical, chemical, petrochemical, offshore,

sub-sea and nuclear industries,

can be satisfied with this range of transmitters.

Standard transmitters are held in our UK facility for next day delivery.

By selecting from a large range of materials,

we are able to customize the transmitter and supply remote seals.

We temperature compensate for the whole assembly to maintain the highest level of performance.

Selecting from 316SS, Hastelloy, Monel, Tantalum, Gold, and Ceramic.

We can custom build a transmitter to our own high standards,

or to your individual specifications.

To provide high flexibility, remote seals can be fitted to any of the SI series of transmitters.

For further information, please Contact us

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SI 1151GP Gauge pressure transmitter
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