---
title: Dual Gas CO and CO2 Analyser (%) | Sarvesh
url: https://www.sarveshanalytics.com/co-and-co2-analyser.html
description: ACCURRA-S dual-gas analyser for percent CO and percent CO2 in one enclosure. NDIR sensors, independent outputs.
updated: 2026-11-03
source: html
---

ACCURRA-S dual channel

# Dual-gas CO and CO2 analyser in percent, NDIR

A dual-gas ACCURRA-S measures percent CO and percent CO2 in one enclosure, with two NDIR sensors, independent outputs and Modbus IDs.

- ISO 9001:2015, certified by TÜV
- Designed and built in Pune since 2002
- Supplied to Reliance, Tata Steel, Indian Oil, Linde and ISRO

 Quick answer

A dual-gas ACCURRA-S measures percent CO and percent CO2 in one enclosure with two NDIR sensors (models 2030 and 6030), each with its own output and Modbus ID. It suits cable fire testing, furnace atmospheres and process gas.

Updated 3 November 2026 · Figures from Sarvesh datasheets

## Specifications

| Item | Specification | Notes |
|---|---|---|
| CO | 0 to 100 % (min 0 to 5 %) | NDIR, model 2030 |
| CO2 | 0 to 20 % or 0 to 100 % | NDIR, model 6030 |
| Independence | Own electronics, outputs, relays and Modbus ID per channel |  |

From the current Sarvesh product datasheets and company profile. Specifications may change without notice as products improve. The final responsibility to check that a product meets the process and analyser requirement remains with the customer.

## Key features

- Independent electronics, microcontroller, 4-20 mA, relays and Modbus ID per sensor
- Common pneumatics and one fine filter
- Calibration history and password protection

## How it works

Carbon monoxide and carbon dioxide are the two products of burning carbon. Their ratio shows how complete the combustion or reaction is, which is why they are measured together in test ducts, furnace atmospheres and process gas.

Both use NDIR, which is stable for years and needs infrequent calibration. A dual unit reads both from one sample with independent outputs.

## Requirements and limits

- Safe-area analyser; the standard sample specification applies.

## Selection guidance

See the dual-gas analyser page for the full list of combinations.

## Applications

Application pages where this is part of the recommended solution:

- [Optical fibre and cable manufacturing](https://www.sarveshanalytics.com/applications/optical-fibre-and-cable-manufacturing.html)
- [Heat-treatment furnace atmosphere](https://www.sarveshanalytics.com/applications/heat-treatment-furnace-atmosphere.html)
- [Steel plant process gases](https://www.sarveshanalytics.com/applications/steel-plant-process-gas-analysis.html)

## Compatible products

[

### ACCURRA-S

Online analyser for trace, percent and purity O2, CO, CO2, CH4 and dew point; can measure two gases from one sample. View ACCURRA-S

](https://www.sarveshanalytics.com/safe-gas-analyser.html)[

### Headline filters

Particulate, coalescing and PTFE membrane filters from Headline Filters, UK, for analyser protection. View Headline filters

](https://www.sarveshanalytics.com/headline-filters.html)

## Frequently asked questions

**What ranges?**

CO 0 to 100 percent with ranges down to 0 to 5 percent; CO2 0 to 20 or 0 to 100 percent.

**What sensor?**

NDIR for both.

**Used for cable testing?**

Yes. The brochure lists CO and CO2 in cable certification.

**Can I add oxygen?**

Ask us about other combinations.

## Related pages

- [Dual-gas analysers](https://www.sarveshanalytics.com/dual-gas-analyser.html)
- [Dual gas CO2 and CH4 (percent)](https://www.sarveshanalytics.com/co2-and-ch4-analyser.html)
- [Dual gas O2 and CO2 (percent)](https://www.sarveshanalytics.com/o2-and-co2-analyser.html)
- [Dual gas trace CO and CO2](https://www.sarveshanalytics.com/trace-co-and-co2-analyser.html)
- [Dual gas trace oxygen and moisture](https://www.sarveshanalytics.com/trace-oxygen-and-moisture-analyser.html)
- [**Browse all gas analysers**](https://www.sarveshanalytics.com/gas-analyser.html)