Coal Mill Oxygen and CO Analyser

Quick answer

Use ACCURRA-S 3030, 2030. Mill outlet oxygen and CO signal ignition risk and control inert gas. Dusty, humid sample; heated filter probe needed.

Updated 2 November 2026 · Figures from Sarvesh datasheets

The measurement and why it matters

Mill outlet oxygen and CO signal ignition risk and control inert gas. This is a good fit, with one configuration or sample-handling point to confirm before we quote.

Oxygen and carbon monoxide in combustion gas show how well fuel is burning. Too much air wastes heat, too little leaves carbon monoxide and unburnt fuel. A continuous reading lets the operator or the control system trim the burner instead of guessing.

Combustion gas is hot, often dusty and sometimes wet. ACCURRA-Zr mounts on the duct and reads oxygen with no sample line, its sensor protected just outside the wall, with probe options for high dust and for temperatures up to 1400 C, while extractive ACCURRA-S analysers read CO and other gases from a conditioned sample.

Typical buyers in India: cement and thermal power plants. Where this matches your plant, send us the gas, range, pressure and temperature at the tapping point and we will confirm the analyser and sample path.

Models and ranges

Model	Measures	Range	Sensor and notes
3030	Oxygen percentage	0 to 25 % and 0 to 100 %	Electrochemical
2030	Carbon monoxide	Percent ranges	Confirm the range against the datasheet

Process notes

What the analyser reads here

Gases of interest: O2, CO. Analyser fit: ACCURRA-S 3030, 2030.

The table above lists each model with its range; where a row says to confirm the range, we check it against the datasheet for your application before quoting.

What to settle before ordering

Dusty, humid sample; heated filter probe needed.

We would rather confirm these points at the start than discover them at commissioning, so please include them with your process details.

Sampling and installation

Every ACCURRA-S has an internal fine filter and rotameter. Regulate sample pressure and flow externally; the catalogue recommends about 1 LPM and a sample pressure of 2 to 10 psig.
Keep sample lines short, clean and dry, and vent the sample somewhere safe.

ACCURRA-S sample specification: non-corrosive, non-toxic, non-flammable, non-condensing and dry, free from entrained oil; sample pressure 2 to 10 psig, regulated externally; flow about 1 LPM; dust below 3 micron. Where your sample differs, we design conditioning around it.

Send us your process data

Application data sheet

The same pre-order design inputs our engineers design from, online. Fill in what you know, leave the rest. Your draft saves as you go, and you can print or send it when ready.

Start the data sheet

What the data sheet asks for

Send what you have and we will ask for the rest.

The gases to measure, the range, and the accuracy you need
Background gases and their typical composition
Sample temperature, pressure and dew point at the tapping point
Dust level, and whether the gas carries tar, oil or condensable vapour
Process connection and, for ducts, the duct diameter
Where the sample vents to, and at what pressure
Area classification of the tapping point and of the analyser location, and the IP protection needed
Distance between the tapping point and the analyser
Outputs you need: 4-20 mA, dual range, relays, Modbus RTU
Calibration approach, calibration gas available, and whether blowback is required
Utilities at site: power supply, instrument air, nitrogen, steam and cooling water, and the ambient temperature range
Gases and ranges: O2, CO
The point to confirm: Dusty, humid sample; heated filter probe needed.

Recommended Sarvesh products

ACCURRA-S

Trace, percent and purity analysis of O2, CO, CO2, CH4 and dew point.

View ACCURRA-S

SP and SRP sample probes

Heated or retractable probes with blowback for dusty or hot gas.

View SP and SRP sample probes

Headline filters

Particulate and coalescing protection for the analyser.

View Headline filters

i-Cons

Peltier conditioner for wet or condensing samples.

View i-Cons

Frequently asked questions

Which analyser suits coal mill inerting and fire protection?

ACCURRA-S 3030, 2030 Mill outlet oxygen and CO signal ignition risk and control inert gas.

What should I check before ordering for coal mill inerting and fire protection?

Dusty, humid sample; heated filter probe needed.

Who typically needs this?

Typical buyers in India: cement and thermal power plants.

Can Sarvesh support a variation of this application?

Yes. If your process differs from the usual case, send the details. Application engineering is where we start every project, and bespoke applications are welcome.

Oxygen and CO monitoring for coal mill inerting and fire protection