Pentagram

Ultra-Low Temperature Storage

ULT Freezer

Maximum protection for samples that matter. Secure ultra-low temperature storage with high thermal stability, integrated safety mechanisms, and energy-optimised cooling technology.

Reliable Long-Term Ultra-Low Temperature Storage

When it comes to ultra-low temperature storage, one factor is paramount: the reliable protection of your samples over extended periods of time. The Memmert ULT freezer has been developed specifically for this purpose.

It combines consistent, precise temperature control with integrated safety features and energy-optimised design for continuous operation.

In life science and clinical applications, biological materials often remain stored for days, weeks, or even years. Stable and uniform conditions are therefore critical for success.

Available Models

ULT240
244 Liter
Internal Dimensions:
450 × 1111 × 489 mm
ULT240eco
244 Liter
Internal Dimensions:
450 × 1111 × 489 mm
ULT360
360 Liter
Internal Dimensions:
450 × 1276 × 627 mm
ULT360eco
360 Liter
Internal Dimensions:
450 × 11276 × 627 mm
ULT500
506 Liter
Internal Dimensions:
600 × 1345 × 627 mm
ULT500eco
506 Liter
Internal Dimensions:
600 × 1345 × 627 mm
ULT750
750 Liter
Internal Dimensions:
890 × 1345 × 627 mm
ULT750eco
750 Liter
Internal Dimensions:
890 × 1345 × 627 mm
ULT1000
966 Liter
Internal Dimensions:
1035 × 1276 × 732 mm
ULT1000eco
966 Liter
Internal Dimensions:
1035 × 1276 × 732 mm
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Benefits

 

Temperature Range
–50 to –86 °C
Cooling Technology
Dual cascade system, optionally with inverter-controlled compressors on Eco Line models.
Rapid Cool-Down
High-power compressors and modern control technology ensure the right balance of performance and energy consumption.
Sustainability
Natural refrigerants, recyclable materials and energy-optimized components.
Operation
7” touchscreen with intuitive interface and real-time display of temperature and process status.
Uniformity
Stable and homogeneous conditions throughout the interior for sample protection.

4-Level Safety Concept

1
Visual & Audible Alarms
Immediate alerts for critical operating situations.
2
Battery-Backed System
Supports monitoring and alarms during power interruptions.
3
CO₂ / LN₂ Emergency System
Optional backup system for added sample protection.
4
Remote Monitoring
Track status and receive live alerts anytime and anywhere.

Typical Applications

  • Long-term storage of biological samples
  • Cryopreservation workflows
  • Life science and clinical laboratories
  • Storage of temperature-sensitive materials
  • Applications requiring high thermal stability

Premium Quality

Constructed from high-quality 1.5 mm stainless steel, the housing offers excellent operational reliability and long-lasting protection against corrosion.

Specifications

Specifications

Specification Comparison Sheet

Memmert ULT Freezer Models

Specification ULT240 ULT240eco ULT360 ULT360eco ULT500 ULT500eco ULT750 ULT750eco ULT1000 ULT1000eco
Temperature Range –50 to –86 °C
Setting Accuracy 0.1 °C
Control Unit 7” touchscreen integrated in outer door
Interfaces Ethernet LAN, USB
Temperature Monitoring Pt1000 temperature sensor
Alarm Visual and acoustic
Power Failure Behaviour Backup battery for alarming and monitoring during power failure
Cooling System Cascade compressors Cascade inverter compressors Cascade compressors Cascade inverter compressors Cascade compressors Cascade inverter compressors Cascade compressors Cascade inverter compressors Cascade compressors Cascade inverter compressors
Refrigerants R455A / R170 R290 / R170 R455A / R170 R290 / R170 R455A / R170 R290 / R170 R455A / R170 R290 / R170 R455A / R170 R290 / R170
Volume (L) 244 244 360 360 506 506 750 750 966 966
Internal Dimensions (W × H × D mm) 450 × 1111 × 489 450 × 1111 × 489 450 × 1276 × 627 450 × 1276 × 627 600 × 1345 × 627 600 × 1345 × 627 890 × 1345 × 627 890 × 1345 × 627 1035 × 1276 × 732 1035 × 1276 × 732
External Dimensions (W × H × D mm) 700 × 1832 × 738 700 × 1832 × 738 700 × 1992 × 888 700 × 1992 × 888 850 × 2000 × 888 850 × 2000 × 888 1140 × 2000 × 888 1140 × 2000 × 888 1285 × 1992 × 973 1285 × 1992 × 973
Max Chamber Load (kg) 280 280 320 320 360 360 400 400 440 440
Max Shelf Load (kg) 140 140 160 160 180 180 200 200 220 220
Max Qty of 2” / 50 mm Boxes 162 162 264 264 384 384 576 576 770 770
Door Insulated stainless steel outer door with mechanical door lock
Door Open Detection Standard option
Entry Port / Pressure Relief Opening Ø 26 mm, lateral
Interior Configuration 4 compartments, 2 stainless steel inner doors, 3 height-adjustable shelves
Net Weight (kg) 245 245 285 285 343 343 380 380 425 425
Gross Weight (kg) 310 310 370 370 430 430 550 550 590 590
Packaging Dimensions (W × H × D mm) 900 × 2050 × 900 900 × 2050 × 900 1080 × 2220 × 1080 1080 × 2220 × 1080 1080 × 2220 × 1080 1080 × 2220 × 1080 1410 × 2220 × 1080 1410 × 2220 × 1080 1440 × 2250 × 1220 1440 × 2250 × 1220
Country of Origin Netherlands
Transport Information The appliances must be transported upright

Applications

Applications

Typical Uses

Applications

Biological Sample Storage
Reliable ultra-low temperature storage for biological materials requiring long-term stability and protection.
Cryopreservation
Suitable for cryopreservation workflows where consistent ultra-low temperatures are essential for sample integrity.
Clinical Laboratories
Ideal for clinical laboratories storing temperature-sensitive materials under controlled and uniform conditions.
Life Science Research
Supports life science research environments that require precise temperature control and long-term sample preservation.
Cell Culture Workflow Support
Complements incubator-based workflows by enabling secure cryogenic and ultra-low temperature sample storage.
Long-Term Preservation
Designed for applications where samples must remain protected for days, weeks, months, or even years.

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