Wastewater Nitrous Oxide in Liquid Sensors and Controllers

United Utilities Water Limited
North West
Direct award
16 September 2025 to 15 September 2030

Provision of 120 liquid-phase nitrous oxide sensors, including controllers, pipe mounting hardware, cabling, and calibration kits. The contract includes a 12-month initial supply of consumables, with an ongoing requirement for spares and replacement probe heads, which have a six-month operational lifespan, over a five-year period.

Open the official notice

Awarded value: £2m; As published
Published: 1 August 2025; Find a Tender
Awarded: 1 August 2025; Unisense Environment A/S
Contract length: 60 months; Ends 15 September 2030

What the buyer is asking for

Supply and maintenance of specialised liquid-phase nitrous oxide sensor equipment, controllers, and associated consumables for wastewater treatment monitoring applications.

Lifecycle

Publishedon Find a Tender
1 August 2025
Contract awardedto Unisense Environment A/S
1 August 2025
Contract starts
16 September 2025
Contract ends
15 September 2030

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The buyer

Type: Other public body
Emissions monitoring contracts, 24 months: 1
Open emissions monitoring tenders: 0
Typical emissions monitoring contract: £2m

See everything United Utilities Water Limited buys →

How it compares

22× the typical emissions monitoring contract (£91k).

Cite this contract

Link: https://bidskim.com/tender/325309/wastewater-nitrous-oxide-in-liquid-sensors-and-controllers
Buyer reference: Not published
Open contracting ID: ocds-h6vhtk-056afa
Source: Find a Tender
Last checked: 12 October 2026

United Utilities Water Limited. Wastewater Nitrous Oxide in Liquid Sensors and Controllers. Contract award, 1 August 2025. BidSkim, https://bidskim.com/tender/325309/wastewater-nitrous-oxide-in-liquid-sensors-and-controllers (accessed 12 October 2026).