The SERVOTOUGH Oxy 1900 is a digital oxygen analyzer for hazardous area use.

Offering industry-standard features alongside revolutionary, value-added options, the Oxy 1900 oxygen (O₂) gas analyzer sets new standards of flexibility, stability and reliability from a single, cost-effective unit.

  • Zone 1/Division 1 hazardous area rated
  • Digital Paramagnetic O₂ measurements
  • Heated sample gas compartment for stability
  • Unique patented FlowCube flow sensor for enhanced safety
  • Auto-validation / calibration option reduces hands-on maintenance
  • Intelligent sample vent pressure compensation option
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Setting new standards of flexibility, stability and reliability from a single, cost-effective unit, our base configuration model offers all the performance capabilities required for entry-level process oxygen measurements.

  • Solvent-resistant Paramagnetic sensor
  • 200ml/min sample inlet bulkhead option
  • 0/4-20mA analogue output
  • Six preconfigured signal interface relays
  • Modbus RTU (RS485) communications
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For users facing typical process control requirements, our mid-level configuration meets the challenges involved, delivering the same reliable oxygen measurements as the base model, supported by additional automated capabilities and value-added features.

  • Has the same core options as Standard Variant 01
  • Heated sample inlet/outlook bulkhead
  • Auto-validation
  • Autocalibration
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For users who want to get the maximum from their analyser and be ready to meet every eventuality, we offer a full-configuration model for the most demanding process O₂ applications, with all available measurement options fitted.

  • Has same core options as Standard Variant 02
  • Internal sample pressure measurement
  • Solid-state Flowcube flow sensing technology
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Adding to our base level configuration build but with the new hydrogen resilient transducer option, this model offers all the performance capabilities required for entry-level process oxygen measurements with sample backgrounds containing hydrogen.

  • Solvent-resistant, Hydrogen resilient, Paramagnetic sensor
  • 200ml/min sample inlet bulkhead option
  • 0/4-20mA analogue output
  • Six preconfigured signal interface relays
  • Modbus RTU (RS485) communications
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Get a gas analyser ready to meet the specific needs of your unique applications with a user-configured option.

If one of our standard variants doesn’t match your requirements, we offer custom configurations to match your process precisely.

Get in touch with our experts and tell us what you need to overcome your process challenges. We’ll create, configure, and calibrate your gas analyser to ensure it performs exactly as you expect, delivering key benefits and premium performance.

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SERVOTOUGH Oxy 1900

Standard Variant 01

Standard Variant 02

Standard Variant 03

Standard Variant 04

User-configured

1900 Oxy sq

Ready to buy? Here’s how it works

It’s easy to find the product you need for your application with Servomex

Enquiry

Get in touch to tell us what you need and the application you plan to use it for

Consultation

Our expert team will help you select the right product package, ensuring you have the accessories and support to get the best performance from your analyzer

Fulfilment

Your analyzer will be assembled in one of our state-of-the-art engineering centers and rapidly dispatched to your site

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SERVOTOUGH Oxy 1900 product information

Feature-rich oxygen analysis for hazardous or challenging applications

Luke Purdie
Product Manager – Process pm Oxygen & Zirconia Combustion

The Oxy 1900 sets the standard for O₂ gas analysis, delivering a feature-rich solution designed to meet the monitoring needs of even the most challenging applications.

At the heart of the Oxy 1900 is Servomex’s patented Paramagnetic oxygen sensor, providing highly reliable, accurate and stable percentage measurements of oxygen. Uses industry-leading patented Paramagnetic technology for stable, non-depleting measurement – ensuring a long lifetime of ownership with low maintenance costs.

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Man using tablet at Natural gas processing facility

A safety-enhanced design for the most stable oxygen measurements

The Oxy 1900 combines enhanced-safety design aspects with ease of use and installation, creating an analytical solution that can reduce costs dramatically over product life. It offers clever, value-added features including a heated sample compartment for unrivalled measurement stability and simplified sample conditioning systems.

When you work with potentially dangerous, hazardous area applications, you need an O₂ analytical solution that delivers benchmark safety compliance and complete reliability without question; product quality and plant safety depend on the equipment you integrate. The Oxy has IECEx/ATEX/UKEX: for Zone 1, and cCSAus C1, D1 for North America certification and is SIL2 (Route 1H) hardware compliant, ensuring it offers solid, trusted reliability in hazardous area locations.

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Low maintenance, low cost-of-ownership

By utilizing patent Paramagnetic sensing technology, the Oxy 1900 benefits from a stable, accurate measurement that requires minimal calibration. Remote device interaction via digital communication options help to further reduce operational costs.

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1900 Oxy grey

High performance monitoring with unique features

The Oxy 1900 introduces unique options that offer unrivaled flexibility, operational performance and reduced costs. An innovative heated sample bulkhead, when coupled with the fully heated sample compartment, can reduce the requirement for a gas conditioning system on samples with a dew point of up to 50oC/122oF and also offers excellent measurement stability; a unique FlowCube sensor which guarantees low flow indication during normal operation; and an integrated pressure compensation system compensates for sample pressure variation, enabling tighter process control.

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Building a system? Contact the experts

If you’re looking to integrate the Oxy 1900 into your gas analysis system, we can help. Servomex can manage your project from design to installation, with our expertise built into every system. Get in touch to learn more.

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Compare our standard analyzer variants

Use the table below to find the right analyzer variant for your application.

CONFIGURATION
OXY VARIANTS:We have 3 pre configured Oxy builds (SV01, SV02 and SV03) to cover the most common chosen option configurations to enable a quick turnaround from specification to delivery.
Standard Variant 1 (SV01)The pre-configured standard variant 1 base level configuration, including the solvent resistant transducer, for general oxygen measurement requirements.
Standard Variant 2 (SV02)The pre-configured standard variant 2 mid level configuration, adding sample heating and auto validation/ calibration to the SV01 build, covering mid level process measurement needs.
Standard Variant 3 (SV03)The pre-configured standard variant 3 full configuration, adding pressure compensation and flow alarm options to the SV02 mid level build, covering all your process measurement needs.
Standard Variant 4 (SV04)The pre-configured standard variant 4 Hydrogen resilient base level configuration, including the solvent resistant (Hydrogen resilient) transducer, for general oxygen measurement in sample backgrounds containing Hydrogen.
User Configured (UC)Other analyzer configurations not covered by one of the above standard variant configurations, including optional Ethernet TCP communications and corrosion prevention purge options.
OXY VARIANT
Analyzer certification+ SV01SV02SV03SV04UC
cCSAus
IECEX
ATEX
UKEX
Japanese approval (CML)
Supply voltage SV01SV02SV03SV04UC
100 - 120Vac
220 - 240Vac
Measurement SV01SV02SV03SV04UC
Standard transducer
Solvent resistant transducer
Hydrogen resilient transducer*
Sample flow SV01SV02SV03SV04UC
Standard 150-250ml/min (200ml/min nominal)
Bypass Option 50 to 70l/hr (60l/hr or 1l/min nominal)
Heated sample bulkhead SV01SV02SV03SV04UC
Sample heating not required
Sample heating fitted
Internal pressure compensation SV01SV02SV03SV04UC
Pressure compensation not required
Pressure compensation fitted
Internal flow sensor‡ SV01SV02SV03SV04UC
Flow sensor not required
Flow sensor fitted
Autovalidation / calibration SV01SV02SV03SV04UC
Autovalidation not required
Autovalidation fitted
Digital communications SV01SV02SV03SV04UC
Modbus RTU (RS485)
Modbus TCP (Ethernet)
Sample inlet SV01SV02SV03SV04UC
1/4* NPT (F)
1/4* OD compression fitted
6mm OD compression
Enclosure options SV01SV02SV03SV04UC
Breather fitted
Corrosive purge fitted
Gland entries SV01SV02SV03SV04UC
NPT
Metric M20
PG 13.5
Operators manual SV01SV02SV03SV04UC
English
German
Japanese (CML certification option only)
Service manual SV01SV02SV03SV04UC
Not required
English
German
Functional safety SIL2 (Route 1H) SV01SV02SV03SV04UC
Not required
Required - English safety manual
Required - German safety manual
OXY VARIANT SV01SV02SV03SV04UC
Analyzer certification+cCSAus
IECEX
ATEX
UKEX
Japanese approval (CML)
Supply voltage100 - 120Vac
220 - 240Vac
MeasurementStandard transducer
Solvent resistant transducer
Hydrogen resilient transducer*
Sample flowStandard 150-250ml/min (200ml/min nominal)
Bypass Option 50 to 70l/hr (60l/hr or 1l/min nominal)
Heated sample bulkheadSample heating not required
Sample heating fitted
Internal pressure compensationPressure compensation not required
Pressure compensation fitted
Internal flow sensor‡Flow sensor not required
Flow sensor fitted
Autovalidation / calibrationAutovalidation not required
Autovalidation fitted
Digital communicationsModbus RTU (RS485)
Modbus TCP (Ethernet)
Sample inlet1/4* NPT (F)
1/4* OD compression fitted
6mm OD compression
Enclosure optionsBreather fitted
Corrosive purge fitted
Gland entriesNPT
Metric M20
PG 13.5
Operators manualEnglish
German
Japanese (CML certification option only)
Service manualNot required
English
German
Functional safety SIL2 (Route 1H)Not required
Required - English safety manual
Required - German safety manual
  • Option selectable
  • Option not available in that variant
  • Pre-selected option

+ Refer to www.servomex.com/product-certification-hazardous-areas for full product certification markings

* Option not available in that variant * Available only as a special build – please consult Servomex

‡ Not suitable for sample gas composition with hydrogen / helium >10% vol.

Leading-edge benefits

Designed for use in hazardous area locations, the Oxy 1900 offers advantages for safety, performance, and maintenance costs.

Excellent Measurement

Excellent measurement stability

A heated sample gas compartment provides the Oxy 1900 with improved measurement performance, while an optional sample heater offers a simplified sample conditioning system design

Unique flow sensor

Unique flow sensor

The Servomex FlowCube technology ensures the Oxy 1900 operates with enhanced safety.

Hazerdous area

Suitable for hazardous areas

The Oxy 1900 can be used in safe areas to Zone 1 / Division 1 hazardous rated locations.  It is SIL 2 (Route 1H) hardware complaint for safety system.

Unrivalled performance

  • Uses industry-leading patented Paramagnetic technology for stable, non-depleting measurement
  • Manufactured by Servomex – over 70 years’ experience innovating and pioneering gas analysis, and thousands of units used in the field every year

Flexible

  • Can be used in locations up to Zone 1/Division 1 hazardous area rated
  • Intelligent diagnostics and flow sensing
  • Optimized for hazardous applications for example; safety critical oxidation, feedstock clean up, blanket inerting and flare stack analysis

Low cost of ownership

  • No need for reference gases/purge gases during operation including use with flammable samples
  • Long calibration intervals and cell life
  • Auto-validation reduces hands-on maintenance needs

Easy to use

  • Intuitive, engineer-friendly use and interaction
  • Reduced requirement for a gas conditioning system for samples with a dew point of <50°C/122°F when sample heated option is used
  • Unique FlowCube sensor technology provides unrivalled reliability and accuracy
  • Intelligent pressure compensation for barometric and sample vent back pressure mvariations

Benchmark compliance

  • IECEx/ATEX/UKEX: for Zone 1, and cCSAus C1, D1 For North America
  • SIL2 hardware compliance (Route 1H) functional safety manual available

CE marked to meet:

  • EU EMC Directive
  • EU RoHS Directive
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Using non-depleting Paramagnetic sensing technology, the Oxy 1900 delivers accurate, sensitive digital measurements of oxygen.

Gas Measurement
Oxygen (O₂)%

Technologies

Paramagnetic
Oxy 1900 oxygen (O2) gas analyzer

Certificates

  • ATEX/UKEX/IECEx: Ex db ia IIC T4 Gb (-10°C ≤ Ta ≤ +60°C)* Ex tb IIIC T90°C Db (-10°C ≤Ta ≤ +60°C)*
  • Class 1, Division 1, Groups A,B,C,D T4 (-10°C ≤ Ta ≤ +60°C)*
  • Class II, Division 1, Groups E,F,G (-10°C ≤ Ta ≤ +60°C)*
  • CML  (Japanese) Ex db ia IIC T4 Gb (-10°C ≤ Ta ≤ +60°C)* Ex tb IIIC T90°C Db (-10°C ≤Ta ≤ +60°C)*
  • All variants comply with BS EN 61010

*(+14°F ≤ Ta ≤ +140°F) **(+14°F ≤ Ta ≤ +122°F). 

Schematics (select to expand)

Oxy 1900 Schematics

Size

448mm (17.6”) Width x 235mm (9.2”) High x 227mm (8.9”) Deep 

Weight

26kg (57lbs) nominal

Get the detailed specifications

“For in-depth specifications you’ll want to download our technical datasheet which includes information on technology, performance, operating environment, sample conditions and compliance along with technical drawings and top-level benefits and applications.”

Luke Purdie
Product Manager – Process pm Oxygen & Zirconia Combustion

Download your full Oxy 1900 resource pack now

“Get all the information you need about the features, benefits, and technical performance of the Oxy 1900 analyzer. We’ve packaged everything into one simple download.”

Luke Purdie
Product Manager – Process pm Oxygen & Zirconia Combustion

Manuals and brochures

Find out how to operate and install your Oxy 1900 with the downloadable manual. You can also see the features and benefits of the product in the brochure.

SERVOTOUGH Oxy 1900 Product Brochure

Learn more about safety-enhanced O2 analysis in challenging applications

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SERVOTOUGH Oxy 1900 Product Brochure

Learn more about safety-enhanced O2 analysis in challenging applications

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SERVOTOUGH Oxy 1900 Operator Manual

Find out how to install, use and maintain your oxygen analyzer

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SERVOTOUGH Oxy 1900 Operator Manual

Find out how to install, use and maintain your oxygen analyzer

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SERVOTOUGH Oxy 1900 (1910B) Spares

See the full list of available spare parts for your SERVOTOUGH oxygen analyzer

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SERVOTOUGH Oxy 1900 (1910B) Spares

See the full list of available spare parts for your SERVOTOUGH oxygen analyzer

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SERVOTOUGH Oxy 1900 (1910B) Recommended Spares

Recommended spare parts and starter pack for your SERVOTOUGH oxygen analyzer

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SERVOTOUGH Oxy 1900 (1910B) Recommended Spares

Recommended spare parts and starter pack for your SERVOTOUGH oxygen analyzer

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SERVOTOUGH Oxy Series Certification Manual

Declaration of conformity, certification and approvals for your analyzer

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SERVOTOUGH Oxy Series Certification Manual

Declaration of conformity, certification and approvals for your analyzer

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Typical applications

Designed for hazardous area use, the Oxy 1900 provides reliable Paramagnetic oxygen measurements for a wide range of industrial applications, including process control, feedstock purity, safety critical oxidation, vapor recovery, and flare stack analysis.

Marine vapor control

An industry-approved solution for hazardous areas

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