PX831

Compact, Intrinsically Safe Pressure Transducers

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Models In Stock

0.3% Full Scale Accuracy
Compact Size
1/2 NPT Process Connection
3/4' Conduit Connection with 24' Cable

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PX831

From ^$ 919.69

Models In Stock

Shop Models

1 Variations available

See all series options below

Data Sheet

Product Overview

Accuracy Detail ± 0.3% of span @ 25°C (includes linearity, hysteresis and repeatability)
Electrical Connection 1/2 in NPT male Conduit with Cable
Enclosure Ratings IP66, NEMA Type 4
Fill Fluid DC 200 silicone oil
Loop Resistance, Max 900 Ω @ 30 Vdc
Measurement Pressure, Min 0 psi
Process Connection Size 1/2 in
Proof Pressure Note 300% of rated pressure
Relative Humidity 0 to 1
Series ID PX831
Span Setting Adjustable Range 16 mA ± 1% of span
Storage Temperature, Max 100 °C
Storage Temperature, Min -40 °C
Thermal Effect on Span error, Max ± 2%
Thermal Effect on Zero error, Max ± 2%, ± 2%
Vibration ± 0.1% FS for 3 g to 200 Hz
Weight 374 g

Supported Applications

The Omega PX831 series is a compact, intrinsically safe pressure transducer built for continuous measurement of process pressure in demanding industrial environments. Its 316L stainless steel construction and sealed design let it work with liquid, gas, or vapor media, and its small size and light weight remove the need for complicated mounting hardware, reducing installation time.

Because the PX831 carries FM and CSA approvals for explosion-proof use, it is suited to hazardous locations, including Class I, Division 1, Groups B, C and D; Class II, Groups E, F and G; and Class III hazardous locations, in a NEMA Type 4 enclosure. This makes it appropriate for oil and gas, chemical processing, and other plants where a rugged, approved transmitter is required.

Operating Conditions & Performance

The PX831 is a fixed-range transmitter with an accuracy of ±0.3% of span at 25 °C, which includes linearity, hysteresis, and repeatability. It provides a 4 to 20 mA, 2-wire output and operates on a supply of 12 to 30 Vdc, with a load resistance of 900 Ω at 30 Vdc.

Pressure ranges span gage models from 0 to 15 psig through 0 to 5000 psig, absolute models from 0 to 15 psia to 0 to 100 psia, and vacuum and compound models such as 0 to 30 inHg vacuum and 30 inHg vacuum to 60 psig. In metric terms the full-scale ranges cover 1.0, 2.0, 7.0, 20, 70, 200, and 350 bar.

Operating ambient temperature: -40 °F to 140 °F (-40 °C to 60 °C).
Process interface temperature: -40 °F to 212 °F (-40 °C to 100 °C).
Overpressure: 300% Span.
Vibration effect: ±0.1% for 3g to 200 Hz.
Humidity: up to 100% RH.
Wetted parts: 316L stainless steel; fill fluid Silicone (DC200).

Configuration Options

All PX831 models share the same 316L stainless steel construction, 4 to 20 mA output, intrinsically safe approvals, and ±0.3% of span accuracy. What distinguishes one model from another is the pressure range and the reference type it is calibrated for.

Reference Type

Gage models measure pressure relative to ambient, absolute models measure relative to a sealed reference, and vacuum and compound models cover negative and combined vacuum-to-pressure spans, so the same transmitter family can be applied to positive, absolute, or vacuum measurement.

Pressure Range and Size

The lower gage and absolute ranges from 15 to 300 psig share one body length, measuring 1.75 in (44.5 mm) in diameter and 4.05 in (103.0 mm) long, while the high-pressure ranges up to 5000 psig use a slightly shorter body. A 0.6 m (24") cable exits a conduit connection for field wiring.

Key Product Differences

A PX831 catalog number combines the PX831 base with a range code and a reference and output suffix, so the range and measurement type are selected at ordering. The example PX831-100GI denotes a gage unit configured for the 0 to 100 psig range.

Available configurations in this series include: