CEMS Hire UK – Continuous Emissions Monitoring

Alkali Environmental Consultants is an independent UK provider of UKAS-accredited MCERTS stack emissions testing, stack emissions monitoring, FTIR emissions monitoring, isokinetic sampling, CEMS hire, QAL2/QAL3 support and environmental permit compliance services. CEMS hire UK: short-term continuous emissions monitoring systems delivered with EN 14181-aligned QA/QC for outage cover, commissioning and parallel-test evidence. Nationwide CEMS hire across England, Wales, Scotland and Northern Ireland. Alkali operates under UKAS Laboratory No. 24303 for industrial operators, environmental permit holders, EfW, MCP, IED and manufacturing sites — request a stack testing quote online by uploading permit or process details. Alkali tracks current UK CEMS guidance — including EN 14181 QAL1/QAL2/QAL3/AST and EA M20 — and delivers the accredited continuous monitoring evidence each one requires under UKAS Laboratory No. 24303.

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MCERTS stack testing with faster quoting and clearer reporting

Alkali helps operators move from permit condition to completed MCERTS report with less friction: online quote requests, fixed-fee scopes, early-booking discounts, automated reporting workflows and direct access to senior technical staff.

UKAS Laboratory No. 24303
MCERTS stack emissions testing
Online quote requests
Fixed-fee scopes
Early-booking discounts for selected services booked at least two months in advance
Automated Environment Agency-ready reporting
Direct senior technical support
Published accreditations and trust signals

Request a fixed-fee quote Discuss your permit requirements

UKAS Accredited Stack Testing (Lab 24303)

Regulator-Ready Reports

14-Day Query Support

Pre-Submission Review

Compliance Confidence Included

Pre-submission review, regulator-ready documentation, and 14 days of post-submission query support are included as standard — to reduce refusal risk and enforcement delays.

Category: Stack Emissions & Monitoring

CEMS Hire UK – Short-Term Continuous Emissions Monitoring for Permit Compliance

CEMS hire in the UK provides continuous emissions data when permanent systems are offline, when commissioning needs proof of performance, or when regulator scrutiny demands an audit-ready evidence trail. For permitted installations, a hired CEMS reduces the risk of a continuous-monitoring data gap during planned outages, breakdowns or analyser replacements. We deploy MCERTS-certified analysers with QA/QC routines aligned to EN 14181 and EA M20 so the data is regulator-ready from day one — not just a stopgap. CEMS hire pairs with our MCERTS stack emissions testing and stack emissions monitoring service for full permit-period coverage.

When Temporary CEMS Hire Is Needed

Temporary CEMS is commonly required where:

Your permanent CEMS is unavailable due to breakdown, maintenance or replacement
You need continuous evidence during commissioning or plant changes
You need short-term monitoring to investigate performance or verify abatement changes
Permit, regulator or stakeholder scrutiny requires improved monitoring evidence
You need additional monitoring to support corrective actions after audit findings

Purpose of Temporary CEMS

The purpose is to maintain monitoring continuity, reduce compliance risk, and produce evidence that supports operational decisions. Temporary systems can also be used to identify trends, stabilise control, and inform longer-term monitoring strategy.

How Temporary CEMS Works in Practice

A successful temporary CEMS deployment depends on correct analyser selection, installation constraints, calibration approach, and evidence/record keeping. We scope requirements from permit limits, determinands and stack conditions, then implement a monitoring set-up that produces useful, defensible data. Where required, we align QA/QC routines to EN 14181 and regulator guidance so evidence is structured and audit-ready.

Typical Temporary CEMS Scope

Temporary CEMS hire typically includes:

Scope and feasibility review (determinands, ranges, installation constraints, objectives)
System selection for relevant measurements (gas components and supporting parameters)
Installation support and commissioning checks (sample conditioning where required)
Calibration and QA/QC routines aligned to evidence requirements
Data capture and reporting outputs suitable for internal governance and regulator discussion

What the Service Delivers

Temporary CEMS deployment plan and implementation support
Defined QA/QC routine and evidence checklist to support credibility
Data outputs and reporting structure aligned to the monitoring objective
Recommendations for longer-term monitoring improvements if required

What We Need From You

We typically request:

Permit monitoring conditions and required determinands
Stack/duct details (access, temperature, moisture, dust loading, sample point constraints)
Expected operating regime during the monitoring period (loads, fuels, hours)
Any existing EN 14181/QA documentation and reporting requirements

Limitations and Scope

Temporary CEMS provides valuable evidence, but it still requires good QA/QC and documentation to be regulator-ready. Where permit conditions require formal EN 14181 deliverables, we can integrate temporary monitoring into a compliant quality approach.

Pollutants and Parameters We Can Cover

Determinand availability depends on scope, sample-line design and equipment availability at the time of hire. Typical hired-CEMS coverage includes:

NOx (NO / NO2)
SO2
CO and CO2
O2 (reference)
Particulate matter (indicative or reference where deployable)
Total VOCs / THC (FID where required)
HCl, HF and NH3 with heated wet sample paths where required
Stack flow, temperature, pressure and moisture for normalisation

Industries and Sites We Support

Energy from Waste and waste incineration
Biomass and combustion plant
Medium Combustion Plant, standby generators and CHP engines
Manufacturing, food and drink and chemicals
Waste treatment, transfer and recycling
Landfill gas and biogas engine sites
Abatement commissioning, process trials and parallel monitoring

Related Stack Monitoring Services

CEMS hire is most often deployed alongside QAL2 and QAL3 CEMS calibration to EN 14181 and scheduled MCERTS periodic stack testing programmes during outage windows. Operators using continuous data to evidence permit conditions also draw on our Operator Monitoring Assessment (OMA) support and Medium Combustion Plant permit support, with ongoing Environment Agency reporting packaged into a single workstream. To scope a hire, discuss your permit requirements with a senior consultant.

Frequently Asked Questions

How fast can a hired CEMS be on a UK stack?

Standard determinands (O2, CO2, NOx, SO2, CO) can typically be on stack within 5–10 working days from instruction once stack details are confirmed. HCl, HF, NH3 or hot/wet sample paths require longer for analyser sourcing and sample-line design.

Will a hired CEMS satisfy my permit's continuous-monitoring condition?

Yes, where the hire is supported by an EN 14181-aligned QA/QC plan, calibration evidence and a documented bridging arrangement. We agree the evidence package with you up front so the EA accepts the data as compliant.

Can hired CEMS provide reference data for QAL2 calibration?

A hired CEMS itself is not a Standard Reference Method, but the deployment can run alongside SRM testing so the temporary AMS data and SRM results validate parallel-test work or AST verification.

What stack interfaces do you need for installation?

We need port locations meeting EN 15259 (or a justified deviation), mains power or generator with UPS, weather-protected analyser housing space, and a heated sample line route under 30 m for hot/wet measurements.

How is industrial stack monitoring data delivered during the hire?

Real-time data is logged to a secure cloud portal with daily auto-validation. We issue a weekly compliance summary plus a final EN 14181-structured report at demobilisation, formatted for direct EA submission.

Is hired CEMS cheaper than a permanent install for short campaigns?

For monitoring periods under 12 months, hire is typically 40–60% cheaper than capex install when you include analyser purchase, civils, SCADA integration and QAL1/QAL2 commissioning.

Can CEMS hire be combined with MCERTS stack testing?

Yes. We regularly run hired CEMS alongside MCERTS periodic stack testing — useful for QAL2 parallel work, AST verification, abatement commissioning and short-term permit compliance evidence inside one mobilisation.

Can Alkali support permit-related emissions monitoring with hired CEMS?

Yes. Hires are scoped against permit conditions, ELVs and reporting expectations. Outputs are structured to feed directly into Environment Agency reporting and permit variation evidence.

Get a fixed-fee MCERTS stack testing quote online

Add the services you need, upload your permit conditions, and Alkali will review the scope and respond with a clear proposal — no phone tag, no email chains. A former Environment Agency officer reviews every brief for accuracy before pricing.