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High Accuracy Oil Filled Pressure Transducers/Transmitters for General industrial applications


Item# PX409-100GI

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $634.68
5-9 $602.95
10-24 $590.25
25-49 $564.87
50-99 $552.17
100+ $539.48

In stock

Lead Time ( If not in Stock): 3 weeks

High Accuracy Oil Filled Pressure Transducers/Transmitters for General industrial applications PX409-100GI PX409-100GI
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  • Fast Response Time
  • High ±0.08% BSL Accuracy
  • High Precision Performance
  • 5-Point NIST Traceable Calibration Included with All Models
  • All Stainless-Steel Wetted Parts (IP67/IP65 Ratings)
  • Advanced Data Logging/Digital Communication (USB/RS485) Functions
  • Wide Selection of Analog Output Signals
  • Popular Electrical Termination Options
  • Diversified Pressure Ranges for All Pressure Types
  • Build/Order Custom Transducers Using Configurator

Edit Options

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Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination or click the CONFIGURE button to build your own.

Pressure Range
Pressure Type
Accuracy Class
Accuracy Value (compensated range)
Output Signal
Electrical Output
Pressure Port Size
Pressure Port Type
Operating Temperature Range
Additional Features

Product Specs

  • Accuracy Value 0.03
  • Input Resistance 5000 Ω ±20% typical
  • Output Resistance 5000 Ω ±20% typical
  • Repeatability ±0.08% BSL maximum
  • Vibration 5-2000-5 Hz
  • Shock 50 g
  • Wetted Materials 316L Stainless Steel
  • Zero Balance ±0.5% FS typical 1% maximum (1% typical

The Most Popular Ranges and Configurations are Stocked for Immediate Delivery. 

OMEGA’S high accuracy PX409 Series Pressure Transducers have a proven record in high-performance commercial and aerospace applications for over 25 years. A full Wheatstone bridge is diffused into a silicon wafer and then micro-machined to exacting standards to produce a silicon sensor that has excellent stability, linearity, repeatability, and excellent long-term stability. At our state-of-the-art facilities, transducers are calibrated using extremely high accuracy equipment, and a 5-point NIST traceable calibration certificate is included with each model. All Stainless Steel wetted parts, welded construction and premium temperature compensation makes transducers suitable for use in tough industrial environments. OMEGA’s free downloadable Software provides advanced data logging capabilities hence add value and flexibility to your transducer performance.

Build/Order/Ship OMEGA’S MM Series Custom Pressure Transducers to meet your pressure sensing requirements:  As a lead pressure transducer manufacturer, Omega has developed a new interactive configuration tool that provides a fast and simple way to build custom transducer suitable for application. MM Series custom transducers allow for over 1-million possible combinations of parameters such as pressure type, range, unit, material, output, accuracy, fitting, temperature compensation range, and electrical termination.  At the end of the process, the Configurator will provide a part number, price and delivery time for the transducer. For more information about Configurator, Options Selection and FAQs. 



PX409 Series Standard Pressure Transducers

PX409 Series 

Hermetically Sealed Gauge (Imperial)

PX409 Series

High Speed USB Output Transducers (Imperial/Metric)

PX409 Series

RS485 Output Transmitters






Pressure Type

Gauge, Absolute
Compound ,Barometric

Sealed Gauge

Gauge, Absolute
Compound ,Barometric

Gauge, Absolute
Compound ,Barometric
Vacuum, Sealed Gauge


0 to 10 Vdc
0 to 5 Vdc
4 to 20 mA
10 mV/V

0 to 10 Vdc
0 to 5 Vdc
4 to 20 mA
10 mV/V


0 to 5 Vdc
4 to 20 mA

Electrical Terminations

M12 Connector

Hermetic Pin Termination

Cable (Std USB Connector Termination)

M12 Connector

Operating Temperature Range

-45 to 121 °C (-49 to 250 °F) or
-45 to 115 °C (-49 to 240 °F)

-45 to 121 °C (-49 to 250 °F) or
-45 to 115 °C (-49 to 240 °F)

-40 to 85 °C (-40 to 185 °F)

-40 to 85 °C (-40 to 185 °F)

Key Features

300% or 400% Proof Pressure
Metric Pressure Ranges

Hermetically Sealed for the Harsh Environments

1000 Reading/Second
Omega’s Free PC Software  for Data Logging and Charting

Up to 640 Readings/Second
Long Distance Transmission
Omega’s Free PC Software   for Data Logging and Charting

Data Sheets

PX409 Gauge-Absolute-Vac-CG-Barometric Pressure
PX409 Hermetically Sealed Gauge Pressure Transducers PX409 High Speed USB Output Pressure Transducers PX409-RS485 Output Pressure Transmitter

* Extra High Accuracy (±0.05% or ±0.03%) Models Available
* Visit Accessories section for compatible Accessories

Some of the most Popular Applications  of Pressure Transducers include: 
  • Measuring inlet, outlet, or system pressure in engine test setup
  • Measuring pressure drops in a line for preventive maintenance
  • Measuring fluid height or level in tanks
  • Measuring a water pipe leak or gas leak and monitoring gas pressure
  • Maintaining pressure in food and beverage lines
  • Sanitary pressure  measurement  in the bio or pharmaceutical industry.
  • For Intrinsically Safe and CSA ratings see model PX509-IS .


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    Hi, we have a PX409-16BI transmitter that we are developing a validation procedure for. Stated zero and span tolerances are +/- 0.5% FS typical with a +/- 1% FS maximum. Which should I use for validation? (BSL is not a validation tolerance)

    Asked by: John314
    You would use the +/- 1% FS max
    Answered by: JKengineer
    Date published: 2020-06-12

    I have to return a couple of these pressure sensors to a client overseas (UK). But before my company can ship them, we need to know the ECCN export number. Please supply the ECCN for these items... PXM419-070BA10V. Thank you.

    Asked by: ziggy19
    Thank you for contacting Omega engineering, for export related question kindly send an email to exportcompliance@omega.com. Thank you.
    Answered by: SAE DVJ
    Date published: 2019-11-23

    I have a PX409-3.5KGUSBH model transducer that currently reads absolute pressure. Can I calibrate the transducer in house to read relative gauge pressure instead?

    Asked by: aaron1230
    Thank you for your inquiry While the construction of a gauge or absolute sensor is fundamentally different, in this case where your sensor has a range of 3,500 psi A is so large it should be fine. This issue is that an absolute sensor has no way to react to changes in atmospheric pressure like a gauge sensor does. The typical worst-case limits in atmospheric pressure changes (if you don't change your elevation) are between 13.5 – 15.0 psi, or about 1.5 psi, this is only (1.5/3500*100) = 0.04% FS change for the sensor, smaller than the error band! You can safely ignore atmospheric pressure changes for this device and offset your device to represent a gauge pressure reading. hope this was helpful?
    Answered by: application engineer je
    Date published: 2020-01-10

    Would the 0 to 350 mbar range transducer be accurate enough to read a 1/10 of a mbar? We are mostly interested in looking at absolute pressures ~1/10 to 10 mbar.

    Asked by: Astro
    Accuracy specification for this unit is 0.08%. This means your allowable error for the 0 to 350mbar range unit would be +/- 0.28 mbar. This would not be accurate enough for your requirement.
    Answered by: JKengineer
    Date published: 2019-11-21

    I need to get accuracy and range on this. Can you please help

    Asked by: Xochiltet
    The three available accuracy ranges these sensors are 0.03%,0.05% & 0.08%. Accuracy is based on the full scale range of the sensor. Available pressure ranges from a low range of 0 to 10"wc up to 0 to 7500 PSI
    Answered by: JKengineer
    Date published: 2019-11-21

    Hello, we need to measure up to 20 Bar pressure absolute. You offer a 17.5 Bar and 30 Bar option. Would the 17.5 Bar sensor report up to 20 Bar, and without causing damage?

    Asked by: ZebraTech
    Hello, Thank you for contacting Omega Engineering. If you want to measure 20 bar absolute you should not use the 17.5 Bar absolute unit, you may damage the diaphragm. Please go with the 30 bar absolute model. Thank you.
    Answered by: SAE DVJ
    Date published: 2019-10-11

    Can the PX409 series be used to measure oil pressure? I cannot find any info stating the acceptable mediums.

    Asked by: Aaron20
    Thanks for your Question. The PX409-001CG10V is a 316 Stainless Steel unit that can be used to measure oil. Please check your oil chemical compatibility with 316SS. Please call or email us at pressure@omega.com with any further questions.
    Answered by: Jane
    Date published: 2019-06-20

    I am trying to locate the system requirements for the software.

    Asked by: Jessie
    The system requirements are: An up-to-date Windows 7, SP1; .NET Framework 4.5.2 (part of Microsoft’s automatic updates); USB 2.0 port. (USB 3 also works). Please contact our Tech Support if you need any further assistance.
    Answered by: Jane
    Date published: 2019-05-06
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