---
title: "Wastewater Nitrous Oxide in Liquid Sensors and Controllers"
ocid: "ocds-h6vhtk-056afa"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-056afa"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-056afa.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-056afa.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "UNITED UTILITIES WATER LIMITED"
published: "2025-08-01"
---

# Wastewater Nitrous Oxide in Liquid Sensors and Controllers

Buyer: UNITED UTILITIES WATER LIMITED  
Current stage: Award  
OCID: ocds-h6vhtk-056afa

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## Summary

United Utilities Water Limited, a private utility company based in Great Sankey, UK, has completed a procurement process concerning 'Wastewater Nitrous Oxide in Liquid Sensors and Controllers.' The buying organisation sought to acquire sensor equipment capable of detecting and measuring nitrous oxide specifically in liquid form, a requirement not met by gas state sensors. The procurement process was conducted via direct award due to the exclusive availability of the product from Unisense Environment A/S. The award was finalised on 1st August 2025, with the contract period set to commence on 16th September 2025 and run until 15th September 2030. The gross contract value is approximately £2.4 million, including consumables post the initial year. The process falls under the goods category and addresses the need within the utilities special regime, with the possibility of contract renewal aligning with regulatory cycles if no other market suppliers emerge.

This procurement offers a significant opportunity for businesses involved in the development and supply of sensor technology, especially those capable of innovating or enhancing products to meet similar requirements in niche markets like wastewater management. Companies operating at the intersection of electronic manufacturing and environmental technology that can provide alternative or improved sensor solutions stand to gain in competitive advantage. Furthermore, businesses experienced in servicing utility markets may find opportunity in offering maintenance and continued support services for the extended lifecycle of the contract, including spares and consumables over the ensuing years. The reliance on a single supplier underscores the potential market gap for alternatives, inviting businesses to engage in research and development to compete in future tenders.

## Notice

This Contract award notice is linked to PPN Notice identifier: 2025/S 000-028704 linked here: https://www.find-tender.service.gov.uk/Notice/028704-2025?origin=Dashboard#top UU are looking to source sensor equipment capable of detecting & measuring Nitrous Oxide in liquid. The requirement of detection in liquid is fundamental to this product; sensors for gas state do not meet this requirement. UU are looking for 120 sensors for immediate requirement, along with appropriate fitments, controllers, pipe mounting equipment, cabling and calibration kits. The initial requirement should also include consumables to run the sensors for 12 months. Our research shows probe heads have a usable lifespan of 6 months. There will likely be on ongoing requirement for spares and consumables for 5 years. Our market intelligence leads us to the conclusion there is only 1 suitable product on the market currently, from Unisense, shown here: https://unisense-environment.com/products/n2o-wastewater-sensor/ We are expecting the cost to come in at approximately PS1M based on the product set from Unisense over 12 months. With a consumables requirement of a further PS1M over the following 4 years. This notice is designed to test our sourcing intelligence with the market for competing product availability.

### Procurement Information

PPN Issued evidences our market intelligence that Unisense are the only supplier currently able to provide this equipment

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/045082-2025 |
| Notice type | UK6 - Contract Award Notice |
| Procurement type | Framework |
| Procurement category | Goods |
| Procurement method | Direct |
| Procurement method details | Direct award |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 1 Aug 2025 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 31 Jul 2025 |
| Contract period | 15 Sep 2025 - 15 Sep 2030 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | £2,000,000 |
| Contracts value | Not specified |

## Status

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

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | UNITED UTILITIES WATER LIMITED |
| Locality | GREAT SANKEY |
| Post town | Warrington |
| Postcode | WA5 3LP |
| Country | England |
| ITL 1 | TLD North West (England) |
| ITL 2 | TLD6 Cheshire |
| ITL 3 | TLD61 Warrington |
| Local authority | Warrington |
| Electoral ward | Great Sankey North and Whittle Hall |
| Westminster constituency | Warrington South |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | UNISENSE ENVIRONMENT |

## CPV Codes

### Divisions

- 35 - Security, fire-fighting, police and defence equipment

### Codes

- 35125100 - Sensors

## Release History

- 1 Aug 2025 at 09:27 - Award - UK6 - Contract Award Notice - https://www.find-tender.service.gov.uk/Notice/045082-2025
- 1 Aug 2025 at 09:13 - Award - UK5 - Transparency Notice - https://www.find-tender.service.gov.uk/Notice/045069-2025

## Documents

- https://www.find-tender.service.gov.uk/Notice/045082-2025
  1st August 2025 - Contract award notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/045069-2025
  1st August 2025 - Transparency notice on Find a Tender

## Notice URLs

- https://unisense-environment.com/
- https://unisense-environment.com/products/n2o-wastewater-sensor/
- https://www.find-tender.service.gov.uk/Notice/028704-2025?origin=Dashboard#top
- 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-056afa. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-056afa.json.