---
title: "AirYX DOAS Equipment"
ocid: "ocds-h6vhtk-0786ed"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0786ed"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-0786ed.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-0786ed.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "Environment Agency"
published: "2026-10-13"
---

# AirYX DOAS Equipment

Buyer: Environment Agency  
Current stage: Award  
OCID: ocds-h6vhtk-0786ed

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## Summary

The Environment Agency bought two commercially available differential optical absorption spectroscopy (DOAS) instruments for measuring atmospheric ammonia (NH₃) with very high sensitivity and precision. Used together at different heights, the instruments measure small differences in ammonia concentrations above agricultural land, forests, moorland and other semi-natural surfaces. Those measurements support calculations of ammonia exchange between the atmosphere and the land. This is a specialist scientific equipment supply requirement, classified as detection and analysis apparatus (CPV 38430000). The Department for Environment, Food and Rural Affairs facilitated the procurement; the Environment Agency is the buyer.

The procurement is complete and the contract was awarded to Cura Terrae Air Ltd. The award was made on 8 October 2026, for £134,836 excluding VAT (£161,803.20 including VAT). The contract period runs from 23 October 2026 to 8 January 2027. This was a below-threshold direct award without competition. The procurement comprised one lot, covering the two ammonia-measuring instruments. No award evaluation basis is recorded.

For suppliers of atmospheric monitoring equipment, this award demonstrates the Environment Agency’s demand for commercially available instruments capable of highly sensitive, precise ammonia measurement. A credible competitor for a similar requirement would need to supply two instruments able to operate simultaneously at different heights and resolve small concentration differences above agricultural and semi-natural land. The equipment must support measurements used to calculate ammonia flux between land and atmosphere, so suppliers should be able to show that their instruments are suitable for this scientific application. Cura Terrae Air Ltd, an SME, won through a direct award without competition; the procurement therefore does not establish a competitive evaluation benchmark or specific accreditation requirement. The relevant commercial opportunity is specialist equipment supply to the Environment Agency, rather than unrelated environmental services.

## Notice

The Environment Agency requires the procurement of two commercially available DOAS instruments capable of measuring atmospheric ammonia (NH3) with very high sensitivity and precision. The instruments will be used simultaneously at two different heights to measure small differences in ammonia concentration above agricultural land, forests, moorland and other semi-natural surfaces. These measurements will be used to calculate the flux of ammonia between the atmosphere and the land surface.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/096725-2026 |
| Notice type | UK6 - Contract Award Notice |
| Procurement type | Standard |
| Procurement category | Goods |
| Procurement method | Direct |
| Procurement method details | Below threshold - without competition |
| Tender suitability | Not specified |
| Awardee scale | SME |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 13 Oct 2026 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 8 Oct 2026 |
| Contract period | 23 Oct 2026 - 8 Jan 2027 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | £134,836 |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Active |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | Environment Agency |
| Locality | LONDON |
| Postcode area | South West London |
| Postcode | SW1P 4DF |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | Enviro Technology Services Ltd |

## CPV Codes

### Divisions

- 38 - Laboratory, optical and precision equipments (excl. glasses)

### Codes

- 38430000 - Detection and analysis apparatus

## Release History

- 13 Oct 2026 at 16:50 - Award - UK6 - Contract Award Notice - https://www.find-tender.service.gov.uk/Notice/096725-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/096725-2026
  13th October 2026 - Contract award notice on Find a Tender

## Notice URLs

- https://defra-family.force.com/s/Welcome
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0786ed. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-0786ed.json.