
LH System
Dilution Refrigerator Measurement System
The LH System is a low-height, compact, and unique horizontal dilution refrigerator measurement system, capable of operating under different tilt angles.
Bluefors LH System is a unique horizontal dilution refrigerator measurement system that is capable of operating under different tilt angles. It comes with special shields with removable blinds, which are easily modified into optical access ports. These features make the LH System ideal for beam line, telescope, or detector applications.



Product Highlights
1.0
LH
Dilution Refrigerator Measurement System
Fully Automated Operation
Fully automated cooldown sequence from room to base temperature, initiated with a single push of a button.
Extensive Capabilities for Experimental Wiring
All line-of-sight ports reach from room temperature to the Mixing Chamber.
- 2 x ISO-K63 slotted in all flanges
- 4 x KF40
Horizontal Orientation
Truly horizontal dilution refrigerator measurement system capable of operating under different tilt angles. Ideal for beam line, telescope, or detector applications.
Superior Performance
- Base temperature below 10 mK
- Fast cooldown: < 24 hours to 10 mK (measured on an empty system with standard experimental space and shield set).
Temperature Controller
The Bluefors Temperature Controller enhances the user experience of our cryogenic systems. With a modern and intuitive user interface, you gain direct control and overview of the system’s temperature status.
The Bluefors Temperature Controller is fully integrated into all dilution refrigerator measurement systems.
Technical Specifications
2.0
LH
Dilution Refrigerator Measurement System
Note: Cooling power is measured from experimental flange outside the Mixing Chamber. Cooldown time to base temperature is measured from an empty system with standard experimental space and shield set.
| LH250 | Guaranteed | Expected |
|---|---|---|
| Base temperature | <10 mK | <8 mK |
| Cooling power at 20 mK | >10 μW | 13 μW |
| Cooling power at 100 mK | >250 μW | 300 μW |
| Cooling power at 120 mK | >360 μW | 590 μW |
| MXC Flange Diameter | 294 mm | |
| Cooldown time to base temperature | < 24 hours | < 21 hours |
Options
3.0
LH
Dilution Refrigerator Measurement System
Other options
Performance Graphs
4.0
LH
Dilution Refrigerator Measurement System

Above is a cooldown curve for a configuration of LH horizontal dilution refrigerator measurement system measured with a calibrated resistance thermometer.
Pulse Pre-Cooling sequence is one of the key points in reducing the cooldown time (see spots 2 and 3). Because we do not use exchange gas some parts of the dilution refrigerator unit stay ‘hot’ on cooldown, which prevents condensation of the helium3 –helium-4 mixture. To cool down these hot spots effectively, the mixture is repeatedly admitted from the tanks to the Still side of the dilution refrigerator to operate as an exchange gas and then pumped out again.
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Layout and Facility Requirements
5.0
LH
Dilution Refrigerator Measurement System
Layout Overview

Each of our systems is designed to be installed to a specific location defined in advance. A separate layout drawing is made for each Bluefors system, which should always be referred to for exact dimensions.
Facility Requirements
The basic requirements are 3-phase electricity, cooling water, and compressed air. The full list of requirements and specification details can be found in the Pre-Installation Guide. Please contact our sales team for a copy.
Explore Our Services
Total System Care
Total System Care is tailored to your specific needs, with the features and services that are designed to best support your systems.
Customer Care
We support our customers throughout the lifetime of their system, providing dedicated care to find solutions for any issues.
Bluefors Lab
Bluefors Lab provides easy and convenient access to a cryogenic measurement system for startups, research groups, and other organizations.
Gas Handling System Upgrade
Bring all the advantages of our new Gas Handling System to older systems by upgrading to Gas Handling System Generation 2.
Pulse Tube Cryocooler Upgrade and Refurbishment
Our pulse tube cryocooler upgrade and refurbishment service helps you to maximize the performance of your systems and extend their lifetime.
Health Check
Health Check help you assess the health of your cryogenic measurement system, ensuring it operates at its best performance.
Training
We offer a training program to support users in operating and maintaining their systems throughout the lifetime of their Bluefors systems.
Relocation
Relocation service helps your when you need to move your lab and its cryogenic measurement systems to a new facility.
Spare Parts
Our spare part stock helps you to access genuine Bluefors parts quickly to maximize the uptime of your systems.

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