---
type: source
title: "Kiutra Commercial ADR Temperature Specifications: 100-300mK, Not Sufficient for Superconducting Qubits"
author: "Kiutra GmbH (kiutra.com)"
url: https://kiutra.com/cryogen-free-sub-kelvin-cooling-rd/
date: 2026-03-20
domain: space-development
secondary_domains: []
format: company-website
status: processed
priority: medium
tags: [helium-3, ADR, cADR, quantum-computing, cryogenics, kiutra, temperature-floor, he3-alternatives]
---

## Content

**Source:** Kiutra GmbH company product pages and technology documentation (accessed March 2026)

**Commercial product temperature specifications:**
- 2-stage cADR: continuous cooling at or above **200 mK**
- 3-stage cADR: continuous cooling at or above **100 mK**
- S-Type (2 ADR units): continuous sub-kelvin cooling; one-shot mode achieves lower temperatures for limited duration
- L-Type Rapid: continuous at **300 mK**, one-shot to **100 mK**; automatic sample transfer; cooldown within 3 hours

**What "continuous" means:** cADR achieves continuous cooling (not intermittent) by running two ADR stages alternately — one cooling while the other regenerates (1-2 hour regeneration, 70-95% duty cycle).

**The critical gap for quantum computing:**
- Superconducting qubit operating requirement: **10-25 mK** (most state-of-the-art systems operate at or below 20 mK)
- Kiutra commercial products: **100-300 mK** — a gap of 4-10x
- This means: current commercial He-3-free ADR is NOT capable of operating superconducting quantum computers

**Kiutra's unique position:** Kiutra is "the only company worldwide that can offer ADR in a continuous configuration (cADR)." Their commercial deployment at research institutions, quantum startups, and corporates worldwide is for applications that require sub-kelvin cooling but NOT the 10-25 mK range of superconducting qubits — e.g., materials research, sensing, quantum optics experiments.

**LEMON project context:** Kiutra's commercial 100-300 mK products are separate from the LEMON research project, which achieved sub-30 mK in March 2025 and aims to close the gap to qubit temperatures.

**Research applications at 100-300 mK:**
- Quantum sensing (some superconducting detectors work at these temperatures)
- Materials science (magnetic measurements, specific heat)
- Some quantum optics experiments
- Pre-cooling for deeper stages (dilution refrigerators pre-cooled by pulse tube first)

## Agent Notes
**Why this matters:** This establishes the baseline: commercially deployed He-3-free ADR is at 100-300 mK, NOT at 10-25 mK required for superconducting qubits. This is the critical clarification from the previous session's "Kiutra already commercially deployed" finding — prior session may have been ambiguous about whether Kiutra's deployment reached qubit temperatures. It does not.

**What surprised me:** The "worldwide deployment" of Kiutra systems is real but for applications that don't require 10-25 mK. The previous session noted "Kiutra already commercially deployed worldwide" as evidence against the "no terrestrial alternative at scale" premise — that framing was misleading. The correct statement is: "Kiutra commercially deployed for sub-kelvin (not sub-30 mK) applications; He-3 free alternatives for superconducting qubits require the LEMON breakthrough to commercialize."

**What I expected but didn't find:** Pricing for commercial systems. Customer list (beyond "quantum startups and corporates"). Timeline for when LEMON results might translate to commercial products in the 10-25 mK range.

**KB connections:**
- Corrects prior session's "Kiutra already commercially deployed" finding — clarifies that commercial deployment is at 100-300 mK, not at qubit temperatures
- Supports the ADR temperature gap analysis: commercial products at 100-300 mK vs. research at ~30 mK vs. qubit requirement at 10-25 mK

**Extraction hints:**
- **Correction to Pattern 4 qualifier:** The prior session said "Kiutra is already deployed — He-3-free alternatives exist." This needs refinement: "Kiutra is deployed for sub-kelvin (100-300 mK) applications; He-3-free alternatives for superconducting qubits (10-25 mK) do not yet exist commercially."
- **New claim candidate:** "Commercial He-3-free ADR systems reach 100-300 mK — insufficient for superconducting qubit operation at 10-25 mK — demonstrating that He-3 substitution for quantum computing requires research ADR systems (approaching 27-30 mK) to bridge a remaining 2-4x temperature gap before commercial deployment"
- **This is a calibration source** — use to set the baseline before citing LEMON and KYb3F10 progress

## Curator Notes
PRIMARY CONNECTION: Pattern 4 qualification — establishes the commercial ADR temperature baseline (100-300 mK) vs. the research frontier (27-30 mK) vs. qubit requirement (10-25 mK)
WHY ARCHIVED: Critical calibration data — establishes that "Kiutra commercial deployment" does NOT mean "He-3-free alternatives for superconducting qubits exist"; corrects potential over-reading of prior session findings
EXTRACTION HINT: Read alongside JACS KYb3F10 paper and LEMON project — these three sources together give the full picture: commercial floor (100-300 mK), research frontier (27-30 mK), qubit requirement (10-25 mK).
