Gases Sensed

S4 AURORA – Paramagnetic oxygen analyser

The new S4 AURORA Paramagnetic oxygen analysers provide accurate percent measurements in combustion testing, inert atmospheres, medical and safety for humans, internal combustion engine exhausts and many more applications. With a remote software suite for control over the Internet, and an optional wireless tablet, the S4 AURORA is simple to operate. To ensure flexibility, users are able to specify their required configuration and programmable contact closures are available for gas path control. In common with all S4 analysers, the AURORA range deliver outstanding performance –  0.01% resolution and  0.1% linearity.

Optional Configuration

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Key Features

• Many different configurations

• Programmable contact closure for gas path control

• Wireless tablet

• Remote software suite for control over the Internet

• 0.01% O2 resolution

• 0.1% linearity

Relevant standards: 

  • EN 14789 
  • Ecodesign 
  • ARP1256D 


• Biological process monitoring 

• Continuous emissions monitoring (CEMs) 

• Combustion research 

• Combustion emissions monitoring 

• Combustion efficiency 

• Process control/monitoring 

• Landfill 

• Mining 

• Safety 

• Modified atmosphere packaging (MAP) 

• Vehicle emissions 

• Locomotive/automotive/marine combustion engine exhaust emissions 

• Ethylene oxide process monitoring 

• Controlled atmosphere storage 

• Gas turbine exhaust emissions  

• Flue gas emissions monitoring

• Process emissions monitoring

• Medical gas purity

• Gas purity


➔ Datasheet

➔ Wireless Tablet User Manual

Technical Specification

DETECTOR TYPE: Paramagnetic. ‘Dumb bell’ servo driven.

Range A: 0-5%, 0-10%, 0-25%.
Range B: 0-100%
Range C: 95-100%

NOISE: 0.005% O2.

LINEARITY: +/- 0.1% O2

REPEATABILITY: < +/- 0.01% O2

ZERO DRIFT: <+/- 0.2% O2 per 30 days


FLOW EFFECT: 0.05% change in reading with flow change of 0.4 l/min to 1.4 l/min into atmospheric pressure.

ZERO – 0.1% O2 Change per degrees-C
SPAN – 0.05% O2 Change per degrees-C

TILT EFFECT: 0.01% O2 per degree of tilt.

EXTERNAL MAGNETIC EFFECT: A mass of soft magnetic material anywhere on the enclosure will cause less than 0.1 % O2 change in reading.

CONSTRUCTION: Wetted parts, 316 Stainless steel and Quartz

DIMENSIONS: 19” X 133.3mm X 550mm


POWER REQUIREMENTS: 110VAC – 250VAC or 24VDC. 70 Watts.

0-10 volts
Ethernet (remote software is included)
Optional 4-20 mA.

GAS CALIBRATION SERVICES: Nitrogen (to set analyser zero) Oxygen in Nitrogen of appropriate concentration for calibration. Or room air.

Optional Configurations

O2 Sensor/Detector Type:
Paramagnetic Sensor
Electrochemical Sensor 

Power Supply:
110VAC/220VAC (Standard – Universal)   

0-5%, 0-10%, 0-25%

Front Panel:
Removable Wireless Tablet 

Gas Handling Type* :
Internal Gas Handling (Single Inlet) – Standard
Full Gas Handling – Optional at extra cost 

Integrated Sample Pump (Only required if sample is not under positive pressure):

Output* (Analogue outputs are either 0-10VDC or 4-20mA):
0-10VDC (Standard)
4-20mA (optional at extra cost)
Upgraded chart output (20 additional alarms) 

MI/995 – Analogue Output SCSI Cable (optional at extra cost):



– Blank Panel is provided with free issued S4i software to act as remote display and to automate coarse and fine calibration. Display: Removable wireless tablet with on-board logging facility. 

– Internal Gas Handling: Basic option is single inlet for all sample and calibration gases. 

– Full Gas Handling: Separate inlets for all samples and calibration gases. Fully solenoid controlled via analyser software. 

– The standard I/O includes 3 contact closure alarm outputs. This upgraded option has 23 user configurable contact closure that can be used for alarms or to control external functions such as down-the-line calibration where valves to introduce calibration gas at the sample inlet point can be controlled automatically.