About us

Specialists in Stirling cooling

Sino Stirling designs and manufactures portable ultra-low temperature freezers in Yinzhou District, Ningbo, China — for laboratories, clinics and distributors worldwide.

Who we are

One technology, done properly

We focus on a single discipline: applying free-piston Stirling cooling to portable ultra-low temperature storage. That focus is why our freezers reach −86 °C in a carryable enclosure, run on AC or 24 V DC, and do it on a few grams of natural refrigerant.

Our range covers three volumes — 13 L, 25 L and 45 L — all built on the same cooling engine, controller and insulation architecture. Beyond the standard models we build to customer specification, including private-label and OEM programmes.

Sino Stirling portable ultra-low temperature freezer

Engineered for portability

Compact enclosures, 15–27 kg empty weight and true auto-voltage input, so a unit can move between sites, vehicles and countries without re-qualification.

Natural refrigerants only

Helium working gas with 10–12 g of R-170 (ethane). Low-GWP, outside phase-down schedules, and free of special freight classification on air, road or sea.

Energy efficient by design

2.4–2.8 kWh/day at −80 °C. Continuous modulation avoids the start-stop losses of a compressor cycle and keeps the cabinet temperature tight.

Quality & compliance

Certification

CE / EMC

Electromagnetic compatibility compliance for the European market.

CE / LVD

Low Voltage Directive compliance — electrical safety of the appliance.

CQC

China Quality Certification Centre product certification.

Certificates and test reports are available on request. Additional market approvals can be discussed as part of an OEM programme — see Custom & OEM.

−86 °C
Ultra-low capability
3
Standard capacities (13/25/45 L)
100–240 V
Worldwide auto-voltage
24 V DC
Mobile power capability
Let’s work together

Tell us what you need to keep cold

From a single unit to a distributor programme — start the conversation with our engineering team.

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