Ultra-Low-Temperature Freezer

The ColdFAST ST series is an advanced solution for the storage of samples and materials in laboratories and research facilities.

With its innovative S-TwinDrive cooling system, which is equipped with two inverter compressors, it ensures a more balanced temperature and maximum energy efficiency. This system offers the highest level of protection for your samples: should one system fail unexpectedly, the other system can maintain the refrigerator at around -75°C to preserve the integrity of your samples.

The ColdFAST ST series is available in two sizes: 530 litres and 780 litres. This provides sufficient space for a wide range of samples and materials, while the focus is clearly on energy efficiency, reliability and safety.

Two high-performance cooling systems:

The two highly efficient cooling systems operate independently of each other. If one system fails, the other can still maintain the temperature at -75℃, ensuring maximum safety and reliability.

Frequency conversion technology:

Frequency conversion technology is used to control the speed of the compressor in real time by adjusting the output frequency. This ensures a balanced temperature and saves energy at the same time.

Applicable for different power supply environments:

DW-HL530 ultra-low temperature freezer can work normally under various power supply environments such as 110V60Hz, 220V50Hz, 220V60Hz, etc.

The compressors ensure a stable ambient temperature of -86℃, which enables efficient sample storage. Extremely labour-saving: An ergonomic handle, a smooth running rail and a high-precision pressure relief valve make opening and closing the door effortless.

3 interior partitions allow the storage area to be divided into 4 levels for convenient sample placement. 4 inner doors (optional 2) reduce icing caused by opening the door. Stainless steel (SUS304) interior material is durable and easy to clean. Equipped with 4 heavy-duty castors and 2 levelling feet to facilitate the movement and fixation of the appliance.


If you need more information, please download the data sheet or contact us directly!


  • Adjustable 3 stainless steel shelves with inner door and double silicone seal
  • The fans have extremely durable bearings
  • The low-noise direct cooling circuit with suspension frame and sound-insulating compartment have a low-noise fan that minimises the noise generated by the freezer as a whole. This means that the ST series only produces a maximum noise level of 54.4 Db(A)
  • Housing insulation with vacuum panels: foamed in polyurethane, 130 mm thick
  • Inner housing with rounded corners for easy cleaning
  • 4 universal castors and 2 levelling feet for easy movement and fixing
  • Remote alarm monitoring including over-temperature alarm, under-temperature alarm, sensor error, battery discharge, high ambient temperature, power failure, etc.
  • 10" HD touch screen with user-friendly interface
  • USB port for reading out temperature data
  • Keypad lock and password access prevent unauthorised access and operation
  • Best recovery time on the market (30 min with door open for 1 min)
  • Painted sheet steel housing



More features

  • Two high-performance refrigeration systems work independently of each other. If one system fails, the other can maintain the temperature at -75℃
  •  Inverter technology, two inverter compressors
  • 0.54 hours recovery time after opening the door for 1 minute.
  • 4.97 hours of lowering to -86℃
  • Daily energy consumption of up to 9.9 kWh
  • High-resolution and user-friendly control panel for setting the temperature range from -40°C to -86°C with digital temperature display with an accuracy of 1°C
  • Lockable door, keypad lock and password protection prevent unauthorised access
  • Ultra-low temperature freezer with stainless steel interior materials and painted sheet steel exterior materials and 4 universal castors for easy movement

Protective devices

  • UL and CE certified for application safety
  • The operating data of the system settings, the alarm data and the temperature data can be recorded every 5 minutes and the data can be stored for up to 10 years. This allows the running status of the product to be effectively recorded over the long term.
  • Suitable for ambient temperatures from 16°C up to 32°C
  • Dual compressor: If one of the compressors fails, another compressor can continue to cool and protect the stored samples down to -75ºC.
  • Input voltage and ambient temperature are displayed simultaneously to facilitate monitoring of environmental conditions
  • Lockable door handle and/or individual key prevent other freezer owners from accessing your valuable samples. There is also space for an additional padlock for extra security. 
  • CO2 safety system including regulator, alarm backup and CO2 valve


  • 10'' HD touch screen to display all necessary information
  • Can add multiple user accounts to log in and record usage/operational data
  • Optional features such as card unlock, fingerprint unlock and face unlock are available to facilitate quick access to samples
  • Comprehensive security system
  • 72h battery back-up: Battery backup for printer and microprocessor with touch screen
  • Stainless steel hinge: Solid hinges on the doors
  • Reinforced shelves: For maximum weight loading, height-adjustable
  • PT 1000 temperature sensor: In stainless steel protective housing
  • Remote alarm: Connection to the on-site BMS
  • USB interface
  • Vacuum release: Port for vacuum release
  • Pre-filter: Easy to change


  • Modbus protocol for data transmission (complies with regulation 21 CFR 11) 
  • CO2 backup system
  • Temperature recorder without ink
  • Voltage stabiliser
  • Racks and boxes
Model Type 530ST 780ST
Cooling performance (°C) -86 -86
Temp. range (°C) -40 – -86 -40 – -86
Power supply (V/Hz) 110-230/50-60 110-230/50-60
Power (W) 860 795
Electricity (A) 6,52 6,81
Power consumption (KWh/24h) 9,46 11,83
Volume (Db(A)) Capacity(l) 54,4 54,2
Capacity (l) 530 780
Net/gross weight (ca.) (kg) 262/361 331/440
Inner dimensions (B×T×H, mm) 585 x 696 x 1266 865 x 696 x 1286
Outer dimensions (B×T×H, mm) 930 x 1041 x 1947 1205x1025x1955