OMD-190 Oxygen Analyzer Southland Sensing

Name: OMD-190 Oxygen Analyzer 0.01ppm-100% – Datasheet & Quote
Brand: Southland Sensing Ltd.

Description

Overview

The Southland Sensing OMD-190 oxygen analyzer is an online unit in a panel mount package with a remote sensor housing, providing trace, percent, or purity analysis from 0.01 ppm to 100% oxygen. It combines precision electrochemical sensor technology with an intuitive user-friendly interface.

The analyzer offers auto-ranging or manual range mode, two adjustable alarm contacts with delay mode, and a direct fit replacement design for existing panel installations.

Engineering & Design

The OMD-190 is built around a precision electrochemical sensor that measures oxygen across the full trace-to-purity span, with an accuracy of plus or minus 1% of full scale. The response time is T90 in 7 seconds, supporting fast detection of oxygen changes in the sample.

The anodized aluminium enclosure with a backlit LCD display is designed for general purpose panel mounting, and the power supply accepts 10-28 VDC or 100-240 VAC for flexible installation. The isolated 4-20 mA analogue output and bi-directional Modbus RS485 ASCII communication interface the analyzer with control systems.

Key Features

Measures from 0.01 ppm to 100% oxygen
Precision electrochemical sensor technology
Auto-ranging or manual range mode
Two adjustable alarm contacts with delay mode
Accuracy plus or minus 1% full scale
Response time T90 in 7 seconds
Isolated 4-20 mA output and Range ID 1-5 VDC
Bi-directional Modbus RS485 ASCII
10-28 VDC or 100-240 VAC power
Panel mount direct fit replacement

Applications

Trace oxygen measurement
Percent and purity oxygen analysis
Inert gas blanketing verification
Process and safety oxygen monitoring
Panel mounted analyzer installations

Specifications

Specification	Value
Manufacturer	Southland Sensing (SSO2)
Model	OMD-190
Range	0.01 ppm to 100% O2
Accuracy	+/- 1% full scale
Sensor	Precision electrochemical
Response	T90 in 7 seconds
Output	4-20 mA isolated, Range ID 1-5 VDC
Communication	Modbus RS485 ASCII
Alarms	2 adjustable with delay mode
Power	10-28 VDC or 100-240 VAC
Display	LCD with backlight
Enclosure	Anodized aluminium, panel mount

Oxygen analysis from trace to purity levels needs a capable analyzer, and the OMD-190 oxygen analyzer delivers, which is why Seven Star LLC supplies the OMD-190 oxygen analyzer for process and safety applications.

For oxygen monitoring projects, the OMD-190 oxygen analyzer is a panel-mounted option covering the trace to purity range. Seven Star LLC supplies the OMD-190 with configuration guidance and ongoing support from our team.

Why Seven Star LLC

Seven Star LLC supplies the OMD-190 oxygen analyzer for gas analysis projects across the Gulf, with verified specifications and technical support. Our team assists with range selection, sensor configuration, and panel installation planning.

We support process, safety, and laboratory customers with reliable B2B supply of oxygen analysis instrumentation throughout the GCC.

Installation & Operation

The panel mount package fits standard panel cutouts, and the remote sensor housing allows the sensor to be located at the sample point while the electronics stay in the panel. The 10-28 VDC or 100-240 VAC power options cover both plant and laboratory supplies.

Operation is straightforward with the backlit display and auto-ranging mode, and the two alarm contacts with delay mode support both process and safety alarm strategies. Modbus RS485 ASCII communication integrates the analyzer with DCS and SCADA systems.

Supply Chain & Sourcing

Seven Star LLC supplies the OMD-190 analyzer and its replacement sensors through the established SSO2 supply channel, protecting your analyzer investment with a dependable source of consumables.

Our team supports range identification for new installations and sensor life planning for existing panels across the Gulf.

For blanketing and purity applications, the analyzer is configured with the appropriate range and alarm set points, and the remote sensor housing can be mounted directly at the sample point to minimise response lag.

The auto-ranging mode simplifies operation when the oxygen level changes across ranges, and the analogue and Modbus outputs feed the DCS or SCADA. Periodic sensor checks and calibration keep the electrochemical measurement accurate over the sensor life.

Selecting the Right OMD-190 Configuration

Before ordering, define the normal operating oxygen level and the worst-case upset level at the sample point. A nitrogen blanket that normally runs at a few ppm but can see air ingress during tank filling needs the auto-ranging mode so the analyzer follows the excursion without saturating. A purity application, such as checking an oxygen supply, needs the upper end of the scale and a tight alarm band instead.

Sample gas composition: list the background gas and any acid gases, solvents or moisture, because these affect the life of an electrochemical sensor.
Sample conditions: confirm pressure, temperature and flow at the remote sensor housing; the sample should be clean and dry before it reaches the cell.
Power and signals: choose the DC or AC supply to match the panel, and decide whether the DCS takes the 4–20 mA signal, the Modbus link or both.
Replacement duty: if the OMD-190 replaces an existing panel analyzer, record the current cutout, wiring and alarm set points so the swap is a direct fit.

Commissioning and Calibration Practice

At start-up, purge the sample line thoroughly before trusting a trace reading; small leaks at fittings and dead legs are the most common cause of high ppm values on a new installation. Use stainless steel tubing and compression fittings for trace service and leak-test every joint. Span the analyzer with a certified gas of known oxygen content in the range you actually operate, and check the zero with a high-purity inert gas when the application demands trace accuracy.

Set the alarm delay long enough to ride through brief sampling disturbances, but short enough that a real oxygen rise in a blanketed vessel is flagged before it becomes a hazard.

Maintenance and Troubleshooting

Slow response or drifting reading: check for a leaking fitting, a blocked filter or low sample flow before replacing the sensor.
Reading will not reach low ppm: suspect air ingress in the sample system or a sensor exposed to air for a long time; allow extra purge time.
Loss of span over months: normal ageing of the electrochemical cell; plan sensor replacement from the calibration trend rather than waiting for failure.

Oxygen Monitoring in Oman and the GCC

In Gulf refineries, gas plants and chemical terminals, the OMD-190 suits nitrogen blanketing of storage tanks, inerting of reactors and dryers, and purity checks on generated nitrogen. High ambient temperatures make it good practice to keep the electronics in a conditioned panel and to shade the remote sensor housing and sample lines from direct sun.

Seven Star LLC can supply the analyzer together with spare sensors so that critical blanketing points are never left unmonitored. Send us the sample conditions and the existing panel details, and we will confirm the configuration, lead time and documentation.

Request a Quote for OMD-190 Oxygen Analyzer Southland Sensing

For the OMD-190 oxygen analyzer or any related control and instrumentation requirement, contact the Seven Star LLC team. Submit a formal inquiry through our RFQ page with your measurement range, connection and configuration, and our specialists will respond with a detailed commercial proposal and the official OMD-190 documentation.

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About brand

Southland Sensing Ltd. builds oxygen analyzers around oxygen sensors it makes in house, for trace and percent measurement. The analyzers carry the OMD name and come as portable units and as online instruments for panels and process lines.

Seven Star LLC lists Southland Sensing oxygen analyzers from the OMD series and supplies them, with replacement sensors, to gas plants, laboratories and process users in Oman.

Southland Sensing OMD analyzers listed here

Five OMD models are on this page:

OMD-21: portable percent oxygen analyzer
OMD-501X: 1/4 DIN panel mount analyzer with a remote sensor housing
OMD-625: online process analyzer for hazardous areas
OMD-677: online analyzer with ppm and percent ranges
OMD-190: oxygen analyzer

The measuring range and the sensor are part of the order, so state both with the OMD number.

Where Southland Sensing oxygen analyzers are used

Typical tasks are checking the purity of nitrogen and other inert gases, watching blanketing and purging, and monitoring glove boxes. Portable units serve spot checks, and online units stay on a sample line. Background gases matter: a stream that carries carbon dioxide or hydrogen sulfide needs a sensor suited to it, which is a frequent question from GCC gas processing sites.

Ordering Southland Sensing analyzers and sensors: what we need

Send the analyzer model and serial number, and for a sensor the type printed on the sensor label. For a new analyzer, tell us the measuring range you need, the background gas composition, the sample pressure and temperature, whether the unit must be portable or fixed, the power supply available, the outputs and alarms required, and the area classification of the mounting location. With this we check the sensor and analyzer selection against the manufacturer documentation. A sensor is a consumable with a limited life, so tell us if a spare sensor should be included.

Browse Southland Sensing Ltd. products by category: Gas Analyzer Systems.