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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
1-4 C$375.00
5-9 C$356.25
10-24 C$348.75
25-49 C$333.75
50-99 C$326.25
100+ C$318.75

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

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Pressure Range Unit
Pressure Range Min
Pressure Range Max
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

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: 17-4 PH SS
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


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 Great Value exactly what was needed and great value will come back for more.
Date published: 2021-05-03
Rated 2 out of 5 by from Word of Caution The product performance was great, but there is a major design flaw. The cable connection option has the cable connected to the body by a nut that if loosened and taken off will break the unit. Whereas the PX409 series differential transducer instead does not have this problem, it has a sealed connection that doesn't allow you to break the unit so easily. The reason I was attempting to take the nut off in the first place was because it was loose and the unit was dunked under water for cleaning so I was trying to make sure the unit would dry out fully before supplying power to the transducer.
Date published: 2021-04-16
Rated 5 out of 5 by from Pressure feedback without breaking the bank Over the years I have purchased a number of these PX309-100GI transducers. I am using them at a nursery where they control the speed of 15HP submersible well pumps driven by Vacon VFD's. Pretty well fail safe. on this last one we added a snubber to hopefully extend the life of the transducer given the location.
Date published: 2020-04-22
Rated 5 out of 5 by from Good value transducer I have used many of these transducers and found them a good value. It makes it easy to purchase them and Omega gives a fast delivery. When I need a replacement, I can get them within days.
Date published: 2020-04-09
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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: 2021-07-26

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

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: Applications 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: Applications Engineer JK
Date published: 2020-07-07
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