At a glance · for buyers and watchdogs
TSI Instruments Ltd has won £1.3m across 16 public-sector buyers, with 5 live contracts. No active Companies House risk flags.
Why: top buyer DEFRA at 20% · 0 active risk flags · 0 modifications.
ESG & policies vault · 0/5
Key governance & sustainability policies. Published documents link out; missing ones are greyed.
Capabilities
What this supplier does, where they sit, who they sell to.
- UK SBS RE160419 Scanning Mobility Particle Sizer with Long DMA and Advanced Aerosol Neutralizer
- HSE RFQ - TSI Aerodynamic Particle Sizer
- CAN: Procurement of Condensation Particle Counter (CPC) device
- Contract for Particle Image Velocimetry (PIV) system for research and teaching activities
Extracted automatically from tsi.com on Jul 2026. Not independently verified — treat as the supplier’s own marketing claims.
Case studies
Delivery stories the supplier has published, with sector and outcome.
No case studies yet
Once a claimed supplier publishes delivery stories — the buyer, the sector, what was delivered and the outcome — they appear here.
Buyer references
Named public-sector contacts who have agreed to act as a reference.
No buyer references yet
Public-sector buyers can confirm they'll act as a reference for this supplier. Confirmed references — with the contract they relate to — show here.
Accreditations & memberships
Independently issued. Verification dates cross-checked against issuer registers.
No accreditations recorded
B-Corp, ISO, Cyber Essentials, Living Wage and similar credentials appear here once added by a claimed supplier and cross-checked against the issuing register.
KPI performance
Delivery, budget and satisfaction scores reported quarterly by buyers.
No verified KPI scores yet
Once buyers report contract KPIs — delivery on time, on budget, satisfaction, adoption and accessibility — a weighted grade and breakdown appear here.
Contracts · 5 live · 19 historic
Pulled from Contracts Finder & Find a Tender. Most recent first.
| Title | Buyer | CPV | Awarded | Value | Term | Status |
|---|---|---|---|---|---|---|
| Health and Safety Executive | 38000000 | 19 Feb 2025 | £52k | 1 mo | Closed | |
| University of Leeds | 38400000 | 30 Apr 2024 | £109k | 3 yrs | Live | |
| National Physical Laboratory | 38000000 | 05 Dec 2023 | £38k | 2 mo | Closed | |
| UK HEALTH AND SECURITY AGENCY | 33100000 | 28 Nov 2023 | £112k | 4 mo | Closed | |
| UK HEALTH AND SECURITY AGENCY | 38947000 | 19 Oct 2023 | £35k | 5 mo | Closed | |
| THE UNIVERSITY OF BIRMINGHAM | 38300000 | 28 Mar 2023 | £72k | 2 mo | Closed | |
| Defence Science and Technology Laboratory | 38433000 | 25 Jan 2023 | £130k | 3 mo | Closed | |
| UK SHARED BUSINESS SERVICES LIMITED | 38000000 | 10 Feb 2022 | £11k | 1 mo | Closed | |
| DEFRA | 90731100 | 11 Nov 2021 | £268k | 5 mo | Closed | |
| THE UNIVERSITY OF BIRMINGHAM | 38000000 | 12 Dec 2020 | £96k | 2 mo | Closed |
Top buyers · 16 buyers · top 3 = 51%
Share of awarded value. Concentration fires above 40% for any single buyer.
Geography
Distribution of awarded value by buyer region.
Peers
Suppliers with overlapping CPVs & buyers (last 24m). TSI Instruments Ltd highlighted.
| Supplier | SME? | Awarded · 24m | Contracts |
|---|---|---|---|
| No | £14.0m | 4 | |
| No | £5.7m | 1 | |
| Yes | £4.2m | 1 | |
| Yes | £4.2m | 2 | |
| Yes | £4.2m | 2 | |
TI TSI Instruments Ltd | Yes | — | — |
Red flags · 0 active
Automated scan of Companies House status, charges and insolvency records.
Compliance scorecard
Derived from Companies House filings — not a full supplier-assurance check.
Modifications
Variations to awarded contracts logged under Procurement Act 2023 s.74.
No modifications recorded
No published contract variations for this supplier. Modification notices appear here as they are issued under the Procurement Act 2023.
News mentions
UK trade press & nationals, matched to this supplier.
No news mentions found
We haven't matched any recent UK press coverage to this supplier. Mentions appear here automatically as they're published.
Companies House
Live sync — registered details, directors, PSC and SIC codes.
Registered details
- Company no.
- 04486008
- Status
- Active
- Type
- Private limited
- Incorporated
- 15 Jul 2002
- Reg. office
- 373 Stirling Road, Stirling Road Cressex Business Park, High Wycombe, Buckinghamshire, HP12 3ST
- SIC codes
- 26511
- Last accounts
- 31 Dec 2024
- Next accounts due
- 30 Sept 2026
Directors & PSC
- SCHWIRTZ, Mark — directorAppointed 31 Dec 2014
- KENNEDY, Thomas E — directorAppointed 07 Apr 2009
- FAUTH, John Joseph — directorAppointed 31 Mar 2004
- Mary Horsch — person with significant controlownership of shares 75 to 100 percent
- Jose Peris — person with significant controlownership of shares 75 to 100 percent
- Brian House — person with significant controlownership of shares 75 to 100 percent
- Mr John Fauth — person with significant controlownership of shares 75 to 100 percent · significant influence or control
Financial
Filed accounts from Companies House.
No financial filings on record
Turnover, profit and headcount appear here once audited or micro-entity accounts are filed at Companies House.
Org tree
Group structure and ownership.
Independent. No parent company or subsidiaries recorded at Companies House for this entity.
Social value
Commitments mapped to the Government Social Value Model themes.
No social-value commitments yet
Jobs, skills, environmental, inequality and community commitments appear here once a claimed supplier attributes them to awarded contracts, or once we detect them on the supplier’s website.