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General Purpose, Stainless Steel Pressure Transducers

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


Item# PX309-100GI

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 $344.02
10-24 $326.82
25-49 $319.94
50-99 $306.18
100+ $299.30

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
  • High Stability, Low Drift
  • 0.25% Static Accuracy
  • IP65 Protection Class

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
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
Bandwidth: DC to 1 kHz (typical)
CE: Compliant
Shock: 50 g, 11 ms half-sine
Vibration: ±20 g
Response Time: <1 millisecond
    PX309: 154 g (5.4 oz)
    PX319/329/359: 100 g (3.5 oz)
IP Rating: IP65

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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 5 out of 5 by from Quality instruments The instruments from omega are always very reliable and accurate as well. I frequently purchase multiple products from them both for business and personal use and will continue to do so. Their customer service is great as well and they are easy to place an order or to fill a quote request. Very happy with them as a vendor.
Date published: 2022-12-01
Rated 5 out of 5 by from Great Product! Exceptional Product. 5/5! Always order these from Omega and they are very consistent with their deliveries, while providing an easy-to-maneuver website to order them.
Date published: 2022-03-18
Rated 5 out of 5 by from Nice! Great product! Cheap but work accurately. Hopefully there will be more in stock so we do not need to wait for production.
Date published: 2022-03-18
Rated 5 out of 5 by from Absolute Pressure Transducer Compact and quick to install. Quality item replacing aged transducers
Date published: 2022-03-16
Rated 5 out of 5 by from Good experience Ordering was easy, my shipment was prompt and item worked as expected. I will use Omega again in the future
Date published: 2022-01-31
Rated 4 out of 5 by from Omega Quick delivery, good product, helpful customer service.
Date published: 2022-01-29
Rated 5 out of 5 by from Great Value exactly what was needed and great value will come back for more.
Date published: 2021-05-03
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Are there any limitations for using the PX309 series transmitters under constant exposure to hydrogen gas (pressures up to 3k psi)? (hydrogen embrittlement specifically) Thank you.

Asked by: alphaTech
The PX309 should not be used to measure hydrogen. Embrittlement will occur.
Answered by: Applications Engineer JK
Date published: 2020-10-09

Where can I find the transfer function for a PX309-100A10V? Is it included in the calibration documentation or do I have to generate it myself?

Asked by: dtorgersen
I am reading voltages off the sensor and using custom software to output a pressure. where do i find the equation that converts the sensor output voltage to pressure?
Answered by: dtorgersen
Date published: 2022-09-19

Is there a manual for installing and programming the PX309-5KG5V? I tried accessing the ftp.omega.com site, but it wasn't working. There also isn't a user manual on the product site. I am trying to connect it to a Arduino Uno and a 12V battery.

Asked by: nbosio1001
The PX309-5KG5V is simply an analog output sensor generating a 0 to 5VDC signal over it's 0 to 5000 PSI pressure range. There is no programming necessary and there is no manual. A wiring is available on both the specification sheet on our website and the calibration report that is shipped with the unit. This is a 3 wire device and wiring is as follows. Red wire should connect to the positive(+) side of our 12V battery. Black wire should connected to both the negative (-) side of your 12V battery and the negative (-) or low input of your readout device. White wire should connect to the positive (+) or high input of your readout device. We would have not have any info on how specifically you would connect this to a Arduino Uno
Answered by: Applications Engineer JK
Date published: 2022-11-04

What is the maximum load that can be used in series with the PX309-1KA (4-20mA output)?

Asked by: ExampleName
By &quot;load&quot;, I meant electrical load (i.e. resistance value, measured in Ohms). Sorry if that wasn't clear form the question. From another answer stating the max current is 24mA, the max resistance would be 1000 Ohms. Is this correct?
Answered by: ExampleName
Date published: 2022-06-14

Does Omega PX309 read above the +15 PSI maximum pressure with less accuracy or the15 PSI is the maximum positive pressure that can read? and what will happen if my sample produces more pressure than the specified limit, is that going to damage the sensor?

Asked by: ZARA
Thank you for your inquiry, the PX309 15PSI has a Pressure Overload rating of 3 times rated pressure. The accuracy of the unit is based on zero to full scale, we do not guarantee specifications over the rated pressure.
Answered by: rkent
Date published: 2022-09-09

Can the PX309 be installed onto a hydraulic system? Can it be used with hydraulic oils to take readings without damage? Thank you

Asked by: Edwards
The PX309 is constructed with stainless steel wetted materials, which would be compatible with hydraulic oils.
Answered by: rkent
Date published: 2021-05-26

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: Applications Engineer JK
Date published: 2021-05-04

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: Applications Engineer JK
Date published: 2020-10-02
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