---
title: "Avalanche Photodiode Detectors (APD)"
ocid: "ocds-h6vhtk-05f00e"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05f00e"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-05f00e.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-05f00e.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "UK ATOMIC ENERGY AUTHORITY"
published: "2025-12-05"
---

# Avalanche Photodiode Detectors (APD)

Buyer: UK ATOMIC ENERGY AUTHORITY  
Current stage: Award  
OCID: ocds-h6vhtk-05f00e

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## Summary

The UK Atomic Energy Authority, a central government public authority, undertook a direct procurement process for Avalanche Photodiode Detectors (APD), specifically designed to detect Thomson scattered light in the visible-IR region. This tender encompasses the procurement of 125 APD detectors featuring on-board diodes for temperature sensitivity detection, which will be integrated into spectrometers for use in Thomson scattering systems. Located at Culham Science Centre, Oxfordshire, the process has reached the award stage as of 5th December 2025, with a completion deadline set for 18th May 2026. The procurement method utilised was below-threshold, proceeding without competition, and falls under the category of goods. The contracted supplier for this award is SOLID STATE SUPPLIES LIMITED, based in Redditch, with the contract being valued at approximately USD 84,785 excluding tax.

This tender offers solid opportunities for businesses specialising in optoelectronic components, especially those adept in photodiode technology and optical detection systems. Companies operating within the electronics supply chain and possessing the capability to integrate advanced detection mechanisms into scientific instrumentation may find lucrative growth prospects through such contracts. The direct procurement method, used here for public authorities, may appeal to established large-scale suppliers who are strategically positioned to fulfil the requirements efficiently and with precision, promoting business expansion in the scientific equipment sector.

## Notice

The UK Atomic Energy Authority has a requirement for Quantity 125 Avalanche Photodiode Detector (APD) to detect Thomson scattered light in the visible-IR region (750-1100nm). The APD detector should have an on board diode for temperature sensitivity detection. These detectors will be built into spectrometers (Polychromators) for application on Thomson scattering systems.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/080299-2025 |
| Notice type | UK7 - Contract Details Notice |
| Procurement type | Standard |
| Procurement category | Goods |
| Procurement method | Direct |
| Procurement method details | Below threshold - without competition |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 5 Dec 2025 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 5 Dec 2025 |
| Contract period | 5 Dec 2025 - 18 May 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | £84,785 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | UK ATOMIC ENERGY AUTHORITY |
| Locality | OXFORDSHIRE |
| Post town | Oxford |
| Postcode | OX14 3DB |
| Country | England |
| ITL 1 | TLJ South East (England) |
| ITL 2 | TLJ1 Berkshire, Buckinghamshire and Oxfordshire |
| ITL 3 | TLJ14 Oxfordshire CC |
| Local authority | South Oxfordshire |
| Electoral ward | Sandford & the Wittenhams |
| Westminster constituency | Didcot and Wantage |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | SOLID STATE SUPPLIES |

## CPV Codes

### Divisions

- 31 - Electrical machinery, apparatus, equipment and consumables; lighting

### Codes

- 31712340 - Diodes

## Release History

- 5 Dec 2025 at 16:03 - Award - UK7 - Contract Details Notice - https://www.find-tender.service.gov.uk/Notice/080299-2025

## Documents

- https://www.find-tender.service.gov.uk/Notice/080299-2025
  5th December 2025 - Contract details notice on Find a Tender

## Notice URLs

- 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-05f00e. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-05f00e.json.