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Configurable, High Accuracy Pressure Transducers

0 to 175 bar, Gauge, RS485, 1/4" NPT Male, M12, (-40 to 185 °F)


Item# PXM459-175BG485-I

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 $1,028.99
10-24 $977.54
25-49 $956.96
50-99 $915.80
100+ $895.22

In stock

Lead Time (If not in stock): 6 weeks
0 to 175 bar, Gauge, RS485, 1/4" NPT Male, M12, (-40 to 185 °F) PXM459-175BG485-I PXM459-175BG485-I
  • Fast Response Time
  • High ±0.08% BSL Accuracy
  • High Precision Performance

PXM459-175BG485-I 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 Top notch The quality of the signal and the precision are excellent. Also, the build quality is also very good.
    Date published: 2023-02-24
    Rated 5 out of 5 by from Exceptional Performance and Reliability I am thoroughly impressed with the performance of the presssure transducer. The transducer offers exceptional resolution, capable of detecting even the smallest leaks. The device was easy to integrate into our system, and the user manual provided clear instructions. Since its installation, it has consistently delivered precise and reliable readings. Overall, I am extremely satisfied with this Omega Engineering pressure transducer and highly recommend it for its high resolution, robust build, and consistent performance.
    Date published: 2024-07-14
    Rated 5 out of 5 by from Nice Unit Works great on our test stand , withstands plenty of abuse .
    Date published: 2024-07-11
    Rated 5 out of 5 by from Good product and excellent service Great product and quality, worked for our project perfectly!
    Date published: 2024-05-31
    Rated 5 out of 5 by from Great Product Great quality and speedy service, we will definitely buy from them again.
    Date published: 2023-12-08
    Rated 5 out of 5 by from Reliable sensors Very liable sensor. Has been our standard design for decades
    Date published: 2023-11-25
    Rated 5 out of 5 by from Great piece of equipment. Durable and reliable sensor. Arrived fairly quickly. A great choice when precise measurements are required.
    Date published: 2023-09-18
    Rated 5 out of 5 by from Quick Delivery Estimated restocking time of 4 weeks but got it in two! Excellent quality sensor
    Date published: 2023-07-27
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    I would like to confirmation that the M12C-PVC-4-R-F-10 is the correct cable for pressure transducer PX459-030AI. The connector for the PX459-030AI transducer is shown as an M12 connector, but it doesn't state whether the M12 connector is Male or Female.

    Asked by: NickEng
    Hello, Thank you for contacting Omega Engineering, the M12C-PVC-4-R-F-10 is indeed the correct cable for the PX459-030AI. If you have further questions feel free to email us at
    Answered by: SAE DVJ
    Date published: 2023-02-26

    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: Applicatrions Engineer JK
    Date published: 2021-02-08

    I have brought 8 of PX459-500GI and I'm looking for a wiring diagram for them, they have and M12 cable

    Asked by: RoyM
    Thank you for your inquire. The wiring is shown on the calibration sheet that is included. We can also generate a new copy if the do not have it. Please contact us at For a copy if needed. Please include the serial number.
    Answered by: application engineer je
    Date published: 2021-05-10

    Hi. Is it possible to re-range existing sensors? We have a few 409 series pressure transducers that we would like to calibrate for another pressure range than that originally purchased for.

    Asked by: Sneed
    Thank you for your inquiry, due to the construction of the PX409 series it is not possible to calibrate to a different range and maintain the accuracy.
    Answered by: rkent
    Date published: 2022-10-07

    The wiring for Model PX409-015G5V Shows the red wire is + EXC. What is +EXC and how is it applied? It different than +24vdc supply?

    Asked by: The_Easter_Bunny
    Thank you for your inquire Please contact us directly to review in detail your wiring question.
    Answered by: application engineer je
    Date published: 2022-06-09

    How do I install this sensor in a pipe?

    Asked by: dudamx
    This sensor has a 1/4 npt male pipe thread as it's process connection. You will need to install a 1/4 npt female fitting on your pipe. On small diameter pipes you can usually install at tee fitting in-line with the pipe that would have this connection.
    Answered by: Applicatrions Engineer JK
    Date published: 2020-10-15

    I have Item# PX409-015VUSBH, 0 to -15, vacuum. Occasionally, there will be small amounts of positive pressure applied to the gauge, no more than 2 psi. Will this potentially damage the gauge? How much positive pressure can I apply until it does damage.

    Asked by: JLIU
    Hello, Thank you for contacting Omega Engineering, occasional small positive pressures in the magnitude or one or two psi should not damage the diaphragm significantly. It is however not recommended since it may affect your zero balance over time.
    Answered by: SAE d
    Date published: 2023-05-04

    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: Applicatrions Engineer JK
    Date published: 2021-02-11

    On the Omega software for USB PT: If anything happens that makes the program freeze up (unplugging the PT) or laptop die (power out) the past data seems lost forever. I've looked for a log file but cannot find anything. How can I recover the data?

    Asked by: DaveTV
    You can recover the data as long as you haven't started logging again. I am sending a pdf which contains a troubleshooting guide that should help you locate the logged data. Emailing it to
    Answered by: Applicatrions Engineer JK
    Date published: 2022-07-12

    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 with any further questions.
    Answered by: Jane
    Date published: 2019-06-20
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