Source: https://tendernation.io/opportunities/01a13bc0-7e36-7001-b69d-185f419dfee6/wastewater-nitrous-oxide-in-liquid-sensors-and-controllers awarded GB direct award procedure # Wastewater Nitrous Oxide in Liquid Sensors and Controllers [United Utilities Water Limited](https://tendernation.io/buyers/united-utilities-water-limited) Estimated value Not stated Published 1 Aug 2025 Deadline Rolling deadline ## Who can bid - Sets up a framework Winning a place does not guarantee work: contracts are awarded later as call-offs, and the list usually stays closed for years. ## About this tender This Contract award notice is linked to PPN Notice identifier: 2025/S 000-028704 linked here: [find-tender.service.gov.uk/Notice/028704-2025](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: [unisense-environment.com](https://unisense-environment.com/products/n2o-wastewater-sensor/) We are expecting the cost to come in at approximately £1M based on the product set from Unisense over 12 months. With a consumables requirement of a further £1M over the following 4 years. This notice is designed to test our sourcing intelligence with the market for competing product availability. Source Find a Tender (UK) · Notice ocds-h6vhtk-056afa-2025-08-01T10:27:37+01:00 [View official notice](https://www.find-tender.service.gov.uk/Notice/ocds-h6vhtk-056afa-2025-08-01T10:27:37+01:00) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free](https://tendernation.io/register) [Buyer profile United Utilities Water Limited: past awards and live tenders](https://tendernation.io/buyers/united-utilities-water-limited) ## More tenders like this [Bannister Sports Centre Athletic Track Soft Market Testing Exercise · Harrow Council · 38 days left · 26 Nov 2026](https://tendernation.io/opportunities/01a1540d-d9e4-71cb-ad57-1603e9042fec/bannister-sports-centre-athletic-track-soft-market-testing-exercise) [Hdc-1714 wadkins pavilion refurbishment · Harborough District Council · 39 days left · 27 Nov 2026](https://tendernation.io/opportunities/01a155bf-f664-72f9-9823-a85d6cddbdc6/hdc-1714-wadkins-pavilion-refurbishment) [Design, supply, and Installation of Newbiggin Skatepark Extension · Newbiggin Town Council · 35 days left · 23 Nov 2026](https://tendernation.io/opportunities/01a15552-19a2-7348-a5cc-3f5ae51ef934/design-supply-and-installation-of-newbiggin-skatepark-extension) [Tender for the design, supply, delivery and installation of a modular UNIT and associated works at ARC healthy living, irvinestown. peaceplus funded upgrade works · Fermanagh and Omagh District Council · 14 days left · 2 Nov 2026](https://tendernation.io/opportunities/01a15552-1b74-73ec-a6f6-a1af37959997/tender-for-the-design-supply-delivery-and-installation-of-a-modular-unit-and-a) [Architectural, design and building consultancy services - Dalby Visitor Centre · Forestry Commission · 25 days left · 13 Nov 2026](https://tendernation.io/opportunities/01a15552-1b8a-7041-80fb-e4943876fc38/architectural-design-and-building-consultancy-services-dalby-visitor-centre) [QW Planned and Reactive Facilities Management Services · Qualifications Wales · 42 days left · 30 Nov 2026](https://tendernation.io/opportunities/01a15552-1c32-72a6-a86e-45f144e2f84b/qw-planned-and-reactive-facilities-management-services)