Silo and Dust Collector Inerting Analyser

Quick answer

Use ACCURRA-Hz, ACCURRA-S 3030. Inerted dust systems are held below a set oxygen level. Dusty sample needs filtering.

Updated 2 November 2026 · Figures from Sarvesh datasheets

The measurement and why it matters

Inerted dust systems are held below a set oxygen level. This is a good fit, with one configuration or sample-handling point to confirm before we quote.

Inerting and oxygen monitoring in flammable atmospheres exist to keep oxygen below a limit. The analyser is part of the safety philosophy, so the area classification, certificate and response requirements are settled first.

ACCURRA-Hz uses an enclosure certified for Gas Group IIC, Zone 1 and 2, T6. We make no SIL claim today. If your project requires SIL-rated devices, tell us at the start and we will state point by point what we meet.

Typical buyers in India: pharma, sugar, pigment, aluminium powder and coal 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
ACCURRA-Hz	Oxygen, hazardous area	Percent and trace	Gas Group IIC, Zone 1 and 2, T6

Process notes

What the analyser reads here

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

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 sample needs filtering.

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

This page overlaps with:

Closed-loop dryers and spray dryers

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
The point to confirm: Dusty sample needs filtering.

Recommended Sarvesh products

ACCURRA-S

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

View ACCURRA-S

ACCURRA-Hz

Certified enclosure for Gas Group IIC, Zone 1 and 2, T6.

View ACCURRA-Hz

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

Frequently asked questions

Which analyser suits dust-collector, mill and silo inerting?

ACCURRA-Hz, ACCURRA-S 3030 Inerted dust systems are held below a set oxygen level.

What should I check before ordering for dust-collector, mill and silo inerting?

Dusty sample needs filtering.

Who typically needs this?

Typical buyers in India: pharma, sugar, pigment, aluminium powder and coal 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 monitoring for dust-collector, mill and silo inerting

The measurement and why it matters

Models and ranges