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General Purpose, Stainless Steel Pressure Transducers

0 to 100 psi, Gauge, 4 to 20 mA, Cable

$368.43

Item# PX309-100GI

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 $368.43
10-24 $350.01
25-49 $342.64
50-99 $327.90
100+ $320.53

In stock

Lead Time (If not in stock): 6 Days
0 to 100 psi, Gauge, 4 to 20 mA, Cable PX309-100GI PX309-100GI
  • 1, 2 & 5 psi Low Pressure Ranges!
  • All Stainless Steel Construction
  • Gage, Absolute, Compound Gage or Vacuum Pressure
  • Rugged Solid State Design

PX309-100GI 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.

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


  • Accuracy Value ±1.0% (5 psig/psia is ±1.5%
  • Repeatability ±0.25% BSL
  • Vibration ±20 g
  • Shock 50 g
OMEGA’s PX309 Series Stainless Steel Pressure transducers below 100 psi use a high accuracy silicon sensor protected by an oil-filled stainless steel diaphragm. Units 100 psi and above use silicon strain gages molecularly bonded to the stainless steel diaphragm.

We provide a complete range of services—from product inception, through design and prototypes, to manufacturing and testing. Our application engineers work closely with our customers to customize, design or create entirely new products. Call us—whether you’re an OEM, manufacturer, or end user.

Link to Pressure Transducer Installation Article

The PX309 is also available in Metric configurations; please see the PXM309 for complete details, or contact our Pressure department for more information.

Common Specifications
Ranges: -15 to 50 psig, 0 to 1000 psia, 100 to 10,000 psig
Accuracy (Combined Linearity, Hysteresis and Repeatability): ±0.25% BSL, max
Minimum Resistance Between Transducer Body and Any Wire: 1M Ω @ 25 Vdc
Calibration: In vertical direction with fitting down,positive outputs only
Pressure Cycles: 10 million, minimum
Pressure Overload: -15 to 50 psig and 0 to 1000 psia: 3 times rated pressure or 20 psi whichever is greater, 100 to 10,000 psig: 2 times rated pressure
Burst Pressure: -15 to 50 psig and 0 to 1000 psia: 4 times rated pressure or 25 psi whichever is greater, 100 to 10,000 psig: 5 times rated pressure
Long Term Stability (1 Year): ±0.25% of FS, typical
Operating Temperature: -40 to 85°C (-40 to 185°F)
Pressure Port: ¼-18 MNPT
Pressure Port Material: -15 to 50 psig and 0 to 1000 psia: 316 SS, 100 to 10,000 psig: SS 316 or 17-4
0 to 500 psi: may contain HNBR o-ring in wetted pressure port assembly
Bandwidth: DC to 1 kHz (typical)
CE: Compliant
Shock: 50 g, 11 ms half-sine
Vibration: ±20 g
Response Time: <1 millisecond
Weight:
    PX309: 154 g (5.4 oz)
    PX319/329/359: 100 g (3.5 oz)
IP Rating: IP65

PLEASE REFER TO 'SPECS' FOR ADDITIONAL SPECIFICATIONS FOR EACH OUTPUT (mV, 0 to 5 Vdc and 4 to 20 mA)
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Rated 4 out of 5 by from compact and reliable Have purchased several of these transducers over the last 10 years and do not recall ever having to replace one due to failure. I usually get the 319 series and my only complaint is that there is no key on the connector to simplify pin alignment. They are also offered a wide range of pressure ratings.
Date published: 2019-04-04
Rated 1 out of 5 by from Untrustworthy calibrations Faked calibration certificate (again). Claims to have been calibrated to 10,000psi using calibration equipment that will go to only 6,000psi
Date published: 2024-04-13
Rated 5 out of 5 by from Great product Works as expected, delivery was quick minimal impact to operations
Date published: 2024-03-13
Rated 5 out of 5 by from Fast Fast Fast Delivery Item as described, fast delivery, Omega always delivers quality products.
Date published: 2024-02-19
Rated 5 out of 5 by from No issues Works great second one we bought it works great for what we do
Date published: 2024-02-18
Rated 5 out of 5 by from Easy to use. This pressure sensor works well and is easy to set up. The wide input voltage range made it easy to integrate with our data acquisition system and the 0-5V output is also easy to work with.
Date published: 2024-01-02
Rated 5 out of 5 by from Quality product The pressure transducer was constructed well to specs and was provided on time. It was a straightforward ordering process.
Date published: 2023-11-02
Rated 5 out of 5 by from Good product Good product for reasonable price and good quality
Date published: 2023-10-03
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What is the supply current on the PX309 whose output is 100mV?

Asked by: Lourrany
We cannot provide a fixed value for the current draw of the 100mV output version of the PX309 Series. The impedance can widely vary due to the internal components used in the each sensor. The current draw however would be extremely low.
Answered by: Applicatrions Engineer JK
Date published: 2021-05-04

Can the sensor PX213 be used in oxygen enriched environment, e.g. 100% O2 concentration. The question is whether the O2 will be able to enter the electronic part of the sensor or it will be stopped by membrane and if materials are appropriate

Asked by: PAULB
Hello, The PX213 has been discontinued for more than a decade. Please note that the PX213 was not oxygen cleaned or oxygen rated, typically for Oxygen use you will need a sensor that is oxygen cleaned to ensure there is no oil fill/ contaminants that will affect your system. If you have more questions feel free to email us at pressure@dwyeromega.com
Answered by: sae dvj
Date published: 2023-10-25

Are FPW-15 or PSR-24 recommended as excitation sources for PX3093KG5V transmitter?

Asked by: alphaTech
Yes, The PX309 will run on any DC voltage between 9 and 30 VDC so either supply will work.
Answered by: Applicatrions Engineer JK
Date published: 2020-10-02

Is it possible to connect multiple pressure transmitters with each of there readout meters into one PC? How to do the cabling and wiring?

Asked by: Ocochem
Assuming that you would be using the 4 to 20mA output version on the PX309 you can simply break the connect of the PX309 and wire the input to the data acquisition you are using with your pc in series with the 4 to 20mA signal from the sensor. If the data acquisition system is designed for a DC voltage input you will need to use a shunt resistor to convert the current signal to voltage.
Answered by: Applicatrions Engineer JK
Date published: 2022-08-09

What is the Ambient Storage temperature of this device? Can it be stored at -40 to 80C and returned to nominal temperature range without degradation or damage?

Asked by: Maxx
Thank you for your inquiry. The Ambient Storage temperature of the PX309 series transducers is between 50 and 80 F.
Answered by: Application Engineer SP
Date published: 2023-10-11

I would like to use in an application where the fluid could come into contact with food. Does this transducer have any FDA certifications (FDA 21 CFR or similar).

Asked by: herbie
The PX309 are designed for general use. They do not have any FDA certifications.
Answered by: Applicatrions Engineer JK
Date published: 2022-01-14

Does the PX309 or PX359-005GI have adjustable zero and span pots? Also, there was a question earlier about IP65 rating for the M12 connector - where the M12 connector and cable do not maintain IP65 rating - is this the same for the PX309 cable?

Asked by: KC18
There are no zero and span adjustments on any of the variants of the PX309 Series. The PX309 has a permanently attached cable. The IP65 rating is maintained on the PX309
Answered by: JK Applications Engineer
Date published: 2024-03-01

What is the inside diameter and depth of the sensing port within the Male 1/4 NPT port on model PX309-100A10V ?

Asked by: Brendon
Thanks for your inquiry. Would only have available a approximation. 1/8 of an inch The depth would fluctuate Hope this was helpful.
Answered by: application engineer je
Date published: 2021-04-30

What is the input impedance and output impedance of the PX309?

Asked by: JWeng
We do not provide the input/output impedance for the PX309 0 to 5VDC output units. The impedance can widely vary due to the internal components used in the each sensor.
Answered by: Applicatrions Engineer JK
Date published: 2021-03-04

What is the difference between a compound gauge and absolute gauge?

Asked by: jackie270
The compound gauge are measuring a vacuum or positive pressure relative to the atmospheric pressure. The unit has a vent to atmosphere for the reference. The absolute gauge units measure pressure relative to an internal sealed vacuum reference.
Answered by: Applicatrions Engineer JK
Date published: 2023-03-14

Are the sensors IO link compatible

Asked by: Steven5907
Thank you for your inquiry, this unit is not IO link compatible
Answered by: rkent
Date published: 2022-09-09

The O'ring is necessary to install PX329-100G5V? What is the torque rage to install the PX329-100G5V?

Asked by: ksmaia
There is no O-ring used on a NPT fitting. You would typically use teflon tape (plumber's tape wrapped around the threads before you install it into the mating female thread connection. You do not torque a npt fitting. You would hand tighten the connection and the use a wrench to tighten it just enough so it doesn't leak
Answered by: JK Applications Engineer
Date published: 2024-03-11

I am interested in the PX309-015GI pressure transducer. In our application, the transducer will be sitting at a slight vacuum (~1 PSI) when the system we are measuring is not running. Is this an issue for maintaining calibration?

Asked by: Sneed
Thank you for your inquiry, 1 PSI vacuum would not be an issue the unit will maintaining calibration
Answered by: rkent
Date published: 2023-02-06

FOr the cable model, what is the WG wire size? What jacket material?

Asked by: White Wizard
Thank you for your inquire. The nominal size is 26 awg. Jacket is pvc
Answered by: application engineer je
Date published: 2022-05-17

Do the PX359 series sensors keep their IP65 rating when paired with Omega's M12 connectors, such as item M12C-PUR-4-S-F-2?

Asked by: Anonymous
No, the sensor will maintain its IP65 rating, but the M12 connectors and cable will not meet that rating.
Answered by: rkent
Date published: 2021-07-07

What is the accuracy and repeatability for PX359-100GI and PX319-300G5V? I see conflicting values in the product summary, common specificiations, and the datasheet.

Asked by: Mayub
Combined accuracy of the PX309 Series is 0.25% BSL. This is a root,sum, square calculation of the linearity, hysteresis &amp; repeatability values for this sensor.
Answered by: Applicatrions Engineer JK
Date published: 2020-04-08

Is the PX359 compatible with Helium?

Asked by: YJSP E
The wetted parts of the PX309/319/329/359 pressure transducers all stainless so media compatibility would not be an issue. The only possible issue the be getting a good seal on the 1/4-18 NPT thread on the process connection when using it with helium. Normally you would use teflon plumber's tape to seal the thread connection
Answered by: Applicatrions Engineer JK
Date published: 2023-03-27

Is there CAD for this model available for download?

Asked by: Mitchell45
Thank you for your inquiry, Unfortunately, we are unable to provide a CAD model for this unit. We do offer the dimensional drawing on the Datasheet.
Answered by: rkent
Date published: 2022-12-21

Good Day Would the PX309 be a recommended sensor to measure Natural Gas pressure at 0-15 Inches WG ?

Asked by: Kevin T
The PX309 Series transducers do not have any explosion proof ratings. We suggest you look at the PX835-005GI has a possible alternative. It has an ATEX rating.
Answered by: Applicatrions Engineer JK
Date published: 2023-06-01

Can this transducer be used with a 24Vdc power supply?

Asked by: nrebers
Thank you for contacting Omega Engineering with your question. The PX309 series transducers are available several different output types and not all of them can operate on 24 Vdc. If the model in questions has a 0-5 Vdc, 0-10 Vdc, or 4-20 mA output then yes, they can operate on 24 volts. If it is one with a millivolt output, then the excitation voltage would be 5 or 10 Vdc depending on the pressure range. Please feel free to contact us again if you have any other questions.
Answered by: engineer rf
Date published: 2019-11-19

For the absolute pressure gauge, where the backside of the diaphragm is vented to?

Asked by: Ben12
Thank you for your inquiry, on a absolute pressure sensor the backside of the diaphragm is sealed.
Answered by: rkent
Date published: 2021-12-03

Can the sensor PX309 be used in oxygen enriched environment, e.g. 100% O2 concentration. The question is whether the O2 will be able to enter the electronic part of the sensor or it will be stopped by membrane and if materials are appropriate

Asked by: Darko
Thank you for this inquiry Due to the construction of our model PX309 series sensors we would not recommend that the sensor be used in oxygen enriched environment.
Answered by: rkent
Date published: 2021-09-17

Can the 50 PSIa model read water pressure? or air only?

Asked by: Craig
Thank you for your question? This is a all stainless steel unit. It can handle liquids or gas that are compatible with this material.
Answered by: application engineer je
Date published: 2019-07-22

I have the PX359-015A10V pressure transducer (0-15 psia, 0-10V output). I am wondering if the 0.25% accuracy, that is given on the specification sheet, means that the accuracy is 0.25% of the full scale?

Asked by: JoeyH9
Yes the 0.25% accuracy is of the full scale range of the sensor.
Answered by: Applicatrions Engineer JK
Date published: 2020-11-23

If I need to measure pressures at 0.05 psia, what pressure transducer would you recommend? Note that I need to make pressure measurements in a vacuum chamber.

Asked by: JoeyH9
thank you for your inquiry. The smallest range and most accurate absolute pressure pressure range unit we offer is the PX409-005A10V. This has an accuracy of 0.08%. We do not offer a 0 to 1 PSIA range in the PX309 or PX409 Series sensors.
Answered by: Applicatrions Engineer JK
Date published: 2020-11-20

For the Gauge Type pressure sensor, does it relative the current atmospheric pressure, or a preset one? Thank you! Best, Renjing

Asked by: zzzz
Thank you for your inquiry, on a PSIG sensor the backside of the diaphragm is vented to atmospheric pressure.
Answered by: rkeny
Date published: 2021-12-03

Does the PX309-3KGI Model Option come with NIST certificate?

Asked by: Moe1982
Thank you for contacting Omega Engineering, All our PX309 models will come with a 5 point NIST traceable calibration certificate.
Answered by: SAE DV
Date published: 2023-02-20

Does the twist lock connector version come with the mating connector?

Asked by: Shane
Thank you for reaching out to Omega with your question. The mating connector is not included and will need to be purchased separately. If you need any further assistance, please reach out to our Tech Support.
Answered by: Jane
Date published: 2020-10-01

Is the PX309-150GI compatible to read liquid Anhydrous Ammonia (NH3) ??

Asked by: Refrigeration
The wetted parts of the PX309-150GI are all 17-4 PH Stainless Steel. Corrosion Resistant Charts indicate it has an excellent &quot;A&quot; rating for use with Anhydrous Ammonia.
Answered by: Applicatrions Engineer JK
Date published: 2020-08-08

Does this unit come calibrated? Or is there an option to get calibration performed?

Asked by: Test Engineer
Hello, All the PX309 models, including this model comes calibrated with a 5 point NIST traceable cal cert. Price is included in the cost of unit. Thank you.
Answered by: SAE DV
Date published: 2019-12-10
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