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Configurable, High Accuracy Pressure Transducers

0 to 100 psi, Gauge, 4 to 20 mA, 1/4" NPT Male, MIL-26482-I 10-6P, (-49 to 240 °F)


Item# PX429-100GI

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 $846.07
10-24 $803.77
25-49 $786.85
50-99 $753.00
100+ $736.08

In stock

Lead Time (If not in stock): 5 Days
0 to 100 psi, Gauge, 4 to 20 mA, 1/4" NPT Male, MIL-26482-I 10-6P, (-49 to 240 °F) PX429-100GI PX429-100GI
  • 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

PX429-100GI Model Options

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Edit these specs to order a different model. 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 Value(compensated range)
Output Signal
Electrical Output
Pressure Port Type
Operating Temperature Range
Additional Features
Accuracy Class
Pressure Port Size

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

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 .


    What is the accuracy of the PX409 Series?

    The PX409 Series has a high accuracy of ±0.08% BSL and includes linearity, hysteresis, and repeatability. To obtain their high accuracy and stability, the PX409 Series uses state-of-the-art digital mapping of the temperature, pressure, and output performance of the silicon sensor in conjunction with a custom ASIC to provide dynamic thermal compensation across the temperature and pressure parameters.

    Is the PX409 Series suitable for any liquid and gas applications?

    OMEGA piezoresistive pressure transducers have a proven record in high performance commercial and aerospace applications for over 25 years. The piezoresistive process and the construction of the PX409 Series provides a very rugged transducer with exceptional accuracy, stability, and thermal effects. The PX409 Series is all stainless steel (316 SS) wetted parts. Please ensure the media under measurement is compatible with wetted parts.

    What is the power supply for the PX409 Series?

    The power supply of the PX409 Series depends on the output of the chosen model and power supply fluctuation protection is standard on all models. Please refer to the table below for details.

    Output Model

    Power Supply

    0 to 5 Vdc

    10 to 30 Vdc@10 mA

    0 to 10 Vdc

    15 to 30 Vdc@10 mA

    4 to 20 mA

    9 to 30 Vdc

    10 mV/V

    Ratiometric 5 to 10 Volts DC

    Is the PX409 Series calibrated?

    The Px409 Series are calibrated using extremely high accuracy equipment and a 5-point NIST traceable calibration certificate that is included with each transducer. It is recommended that the sensor be recalibrated once a year. The most popular ranges and configurations are stocked for immediate delivery. All others typically have a very short lead-time.

    How can I install a PX409 Series in a pipe? Does it need a specific orientation (vertical or horizontal)?

    The PX409 Series has a ¼ - 18 NPT male fitting that is threaded into a pipe fitting for installation. There is no specific orientation needed – the unit is calibrated in the vertical direction with fitting down. The sensor is designed to be quickly customized to meet your exacting specifications, often with fast delivery.

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    Rated 5 out of 5 by from Great product Great product. Works well. Software is simple and easy.
    Date published: 2021-05-12
    Rated 5 out of 5 by from Precise, repeatable, and easy to use These sensors replaced some older models that weren't rated for the pressure in my application. The new ones seem very reliable and the sensor-to-sensor variation between the two that I bought is much smaller than it was for the old ones.
    Date published: 2020-10-06
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    You can specify the "pressure type" measurement as "gauge" or "vacuum". What exactly does the vacuum pressure type mean? It is the same as absolute pressure?

    Asked by: JoeyH9
    A vacuum-type sensor is like a negative gauge, the signal has a negative scale, meaning the low output will be when the pressure is at zero, and as the pressure DECREASES the signal will INCREASE
    Answered by: Cyrus Grimes
    Date published: 2020-12-16

    Is there an option to add grid lines to the charting area?

    Asked by: Domenic
    There is no option to add grid lines to the charting area.
    Answered by: Applications Engineer JK
    Date published: 2021-03-23

    Will MMDDB2.5BIV10P4C5T1A3, listed as bi-directional differential pressure, 0-2.5 psi, read vacuum if the low port is connected to the vacuum process and the high port open to atmosphere? Will it work with both ports across different vacuums?

    Asked by: Ed5280
    If you connect a vacuum to the low and leave the high port open to atmosphere the unit will output 0 to -10VDC if a vacuum id applied to the LOW port. If you apply varying vacuums to both ports the unit will respond with a sign representing the difference between the vacuums applied ranging from -10VDC to +10VDC
    Answered by: Applications Engineer JK
    Date published: 2022-03-21

    What is the recommended calibration frequency for these pressure transducers?

    Asked by: btorrec
    The NIST traceable calibration report shipped with the sensor is valid for 1 year after the sensor ships from Omega. We recommend recalibration once a year calibration cycle.
    Answered by: Applications Engineer JK
    Date published: 2021-04-27

    Will MMDDU2.5V10P4C5T1A3, listed as uni-directional differential pressure, 0-2.5 psi, read vacuum if the low pressure port is connected to the vacuum process and the high pressure port open to atmosphere?

    Asked by: Ed5280
    Yes it will. You will see an increase if the 0 to 10VDC output signal if a 0 to -2.5 PSI is applied to the Low port
    Answered by: Applications Engineer JK
    Date published: 2022-03-21

    PXM-409-350BGUSBH /Serial Nummer: 748240 Pressure-Transducer doesnt get recognized. Fault message is: Dieses Gerät wurde angehalten, weil es Fehler gemeldet hat. (Code 43) Fehler bei einer Anforderung des USB-Gerätedeskriptors.

    Asked by: Mark47228
    This sensor should be return to Omega for evaluation. Please contact our Customer Service for a Return Authorization
    Answered by: Applications Engineer JK
    Date published: 2021-02-08

    Does the pressure transducer have a specific install orientation? Any problems with a horizontal verses vertical install?

    Asked by: mike_mcc
    Typically the readings are not effected by orientation. You may see a shift in the readings on the very low pressure range (0 to 10"H2O and 0 to 1 PSI) if you change orientation but you should be able to calibrate that out in your readout device.
    Answered by: Applications Engineer JK
    Date published: 2021-02-11

    What is the resolution limit on this device? I'm interested in your 0-2 bar sensor and what the lowest pressure value it is able to measure accurately.

    Asked by: Ben_
    Resolution would depend on how small of a signal change the instrumentation used to read the 0 to 10VDC output can resolve. The sensor will read from 0 to 2 bar but the lower 10% of the range (0 to 0.2 bar) would end to be less accurate
    Answered by: Applications Engineer JK
    Date published: 2022-03-01
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