---
title: Installing and Integrating Gas Analysers
url: https://www.sarveshanalytics.com/learn/track-installation.html
description: Where to mount an analyser, how 4-20 mA, relays and Modbus work, wiring and noise, PLC and DCS integration, site utilities and commissioning steps.
updated: 2026-10-21
source: html
---

Learn · Track 4 of 8

# Installation and integration

Mounting, signals, wiring, control-system integration and commissioning.

 6 lessons About 18 min

## What this track covers

An analyser is only useful when its reading reaches the people and systems that act on it. This track covers where to put the instrument, how its signals work, how to wire them cleanly, how to bring the numbers into a control system and how to commission the whole chain.

## Lessons, in order

1. [  **Where to mount a gas analyser: panel, shelter or field** Mount an analyser as close to the sample point as practical, in a clean, temperature-stable, accessible place, out of vibration, direct sun and weather.  Beginner*3 min*](https://www.sarveshanalytics.com/learn/where-to-mount-a-gas-analyser.html)
2. [  **Analyser outputs: 4-20 mA, relays and Modbus explained** A 4-20 mA output sends the reading as a current, with 4 mA for the bottom of the range and 20 mA for the top; the live zero lets the system detect a broken wire.  Beginner*3 min*](https://www.sarveshanalytics.com/learn/analyser-outputs-4-20-ma-relays-and-modbus.html)
3. [  **Wiring, grounding and electrical noise for gas analysers** Use shielded twisted-pair cable for signals, ground the shield at one end, keep signal cables away from power and motor cables, and avoid ground loops by giving the loop a single reference.  Intermediate*3 min*](https://www.sarveshanalytics.com/learn/wiring-grounding-and-electrical-noise.html)
4. [  **Connecting a gas analyser to PLC, DCS and SCADA** Scale the 4-20 mA input to the analyser range, alarm on out-of-range currents as a fault, and use the analyser's fault and calibration-in-progress signals to hold or flag the value.  Intermediate*3 min*](https://www.sarveshanalytics.com/learn/connecting-an-analyser-to-plc-dcs-and-scada.html)
5. [  **Site utilities checklist for gas analysers** An analyser installation needs more than a power connection: a clean, stable electrical supply, instrument air or nitrogen for blowback and purges, a calibration gas supply with regulators, a safe vent, a drain for condensate, and in some cases heating, cooling or ventilation for the enclosure.  Beginner*3 min*](https://www.sarveshanalytics.com/learn/site-utilities-checklist-for-analysers.html)
6. [  **Commissioning an online gas analyser: A Step-by-Step guide** Commission in order: inspect and verify the installation, leak-test the sample system, power up, purge with sample or inert gas, set pressure and flow, calibrate with zero and span gas, test alarms and outputs end to end, run on process gas, and record a baseline of flow, pressure and readings.  Intermediate*3 min*](https://www.sarveshanalytics.com/learn/commissioning-an-online-gas-analyser.html)

Next track: [Calibration and maintenance](https://www.sarveshanalytics.com/learn/track-calibration-and-maintenance.html)