The ULF-901U is a upright-style (vertical) ultra-low freezer in Yamato's STANDARD ULF Series, providing 877 L (31 cu.ft.) of vertical, footprint-efficient sample storage rated to -40°C to -80°C / -40°F to -112°F. Interior organization is by 4 fixed (5 compartments), and the cascade refrigeration system with two hermetic compressors gives rapid pull-down and stable holding for biobank, research, and clinical archives. A battery-backed alarm with remote relay is standard. Rated rack capacity: 35 racks.
This is capital cold-storage equipment shipped LTL freight. Pricing, voltage/plug configuration, freight, and lead time are confirmed on quote. Request a quote to proceed.
Key Specifications
| SKU | ULF-901U |
| Style | Upright-style (vertical) |
| Temperature range | -40°C to -80°C / -40°F to -112°F |
| Capacity | 877 L (31 cu.ft.) |
| Rack capacity | 35 racks |
| Shelving | 4 fixed (5 compartments) |
| Interior dimensions (W×D×H) | 42" x 25" x 51.25" / 106 x 63 x 130 cm |
| Exterior dimensions (W×D×H) | 60.5" x 37" x 79.5" / 153 x 93 x 201 cm |
| Refrigerant | CFC-free R-508B and R-404A (cascade system, two hermetic compressors) |
| Voltage | 115V / 208V / 230V, 60Hz, 1 phase; 220V, 50/60Hz, 1 phase |
| Brochure source | ULF Series Ultra-Low Freezer (BRO-ULF-2025) |
Application Profile
Per the ULF brochure, primary uses for the ULF Series are clinics, research, small laboratories, hospital rooms, and medical clinics. At 877 L (31 cu.ft.), the ULF-901U is suited to:
- Long-term biological sample archiving — cell lines, tissue, serum, plasma, and DNA/RNA libraries
- Cold-chain and biobank storage at research-core and clinical scale
- Vaccine, reagent, and enzyme storage requiring validated ultra-low temperatures
- Footprint-efficient storage where vertical access and adjustable shelving speed sample retrieval
Design Architecture
Refrigeration. A cascade refrigeration system with two large hermetic compressors drives rapid pull-down of the product load. The system is designed to hold internal pressure very low, which limits heat build-up, improves running efficiency, and extends compressor life; an energy-saving low stage operates only on demand. Heat is dissipated by an air-cooled condenser with two heavy-duty fans — no liquid coolant required. Refrigerants are CFC-free R-508B and R-404A.
Temperature control & alarms. Digital temperature control with dual display shows set point and chamber temperature. A scan button sets temperature with a tamper-proof lockout. A battery-operated alarm emits audible and visual signals on mechanical or electrical failure, with over/under-temperature settings, an alarm-silence switch, a battery-test switch, and a relay for remote-alarm hook-up.
Construction. Chamber is 14-ga. zinc-coated galvanized steel; exterior is 16-ga. steel with a powder-coated cool-gray finish. Frost and ice build-up along the gasket is minimized by a heater harness beneath the channel. An automatic timer system restarts the unit after a power failure. Interior organization: 35 racks (4 fixed (5 compartments)). Made in the USA.
Optional accessories (brochure): chart recorder, CO₂ and LN₂ back-up system, racks, and cold-safety gloves.
Frequently Asked Questions
What temperature range does the ULF-901U hold? -40°C to -80°C (-40°F to -112°F), delivered by a cascade refrigeration system.
What is the storage capacity? 877 L (31 cu.ft.), with a rated capacity of 35 racks across 4 fixed shelves (5 compartments).
What refrigeration does it use? A cascade system with two large hermetic compressors and an air-cooled condenser (two heavy-duty fans, no liquid coolant), using CFC-free R-508B and R-404A refrigerants. An energy-saving low stage operates only on demand.
Is this an upright or chest freezer? Upright — a vertical, footprint-efficient cabinet where vertical access and compartment shelving speed sample retrieval.
What voltage does it require? 115V / 208V / 230V at 60Hz, single-phase, or 220V at 50/60Hz, single-phase.
Ordering & Configuration
The ULF-901U ships as a complete, factory-charged ultra-low freezer with digital control, dual display, and the battery-backed alarm system described above. Racks and back-up systems (CO₂ / LN₂) are available as options per the brochure.
As a Type-A, quote-based capital item, confirm on quote the voltage and plug (115V / 208V / 230V at 60Hz, or 220V at 50/60Hz, single-phase); LTL freight arrangements with dock/liftgate and placement access; the temperature target (this unit is rated -40°C to -80°C / -40°F to -112°F); rack/insert configuration and any CO₂/LN₂ back-up or chart-recorder options; and lead time and warranty terms.
Request a quote to configure voltage, freight, and accessories for the ULF-901U. Because this is a Type-A capital item, checkout is quote-based — our team confirms specification and total delivered cost before order.
