The ULF-901C is a chest-style (horizontal, top-opening) ultra-low freezer in Yamato's STANDARD ULF Series, holding 766 L (27 cu.ft.) of sample volume across a top-opening horizontal chamber rated to -40°C to -80°C / -40°F to -112°F. Cascade refrigeration with two hermetic compressors delivers rapid pull-down and stable ultra-low storage for long-term biological and clinical sample archives, with a battery-backed audible/visual alarm and remote-alarm relay standard. Rated rack capacity: 48 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-901C |
| Style | Chest-style (horizontal, top-opening) |
| Temperature range | -40°C to -80°C / -40°F to -112°F |
| Capacity | 766 L (27 cu.ft.) |
| Rack capacity | 48 racks |
| Interior dimensions (W×D×H) | 67" x 23" x 31.25" / 170 x 57 x 79 cm |
| Exterior dimensions (W×D×H) | 98" x 36" x 43.5" / 248 x 91 x 110 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 766 L (27 cu.ft.), the ULF-901C is suited to long-term biological sample archiving — cell lines, tissue, serum, plasma, and DNA/RNA libraries — as well as cold-chain and biobank storage at research-core and clinical scale, and vaccine, reagent, and enzyme storage requiring validated ultra-low temperatures. Its top-opening horizontal format minimizes cold-air loss on access, favoring bulk / high-density storage.
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: 48 racks. 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-901C reach? -40°C to -80°C / -40°F to -112°F, driven by a cascade refrigeration system with two hermetic compressors for rapid pull-down and stable ultra-low storage.
How much can it store? 766 L (27 cu.ft.) with a rated 48-rack capacity; interior dimensions are 67" x 23" x 31.25".
Why choose a chest (top-opening) ULT freezer? The horizontal, top-opening format minimizes cold-air loss on access, which favors bulk / high-density long-term storage.
What voltage options are available? 115V / 208V / 230V at 60Hz, single-phase, or 220V at 50/60Hz, single-phase — specified at order.
What refrigerants does it use, and how is heat rejected? CFC-free R-508B and R-404A in a cascade system, with heat dissipated by an air-cooled condenser and two heavy-duty fans — no liquid coolant required.
Ordering & Configuration
The ULF-901C 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 the following on quote:
- Voltage & plug — 115V / 208V / 230V, 60Hz, 1 phase; 220V, 50/60Hz, 1 phase
- Freight — LTL freight (capital cold-storage equipment); confirm dock/liftgate and placement access
- Rack / insert configuration and any back-up (CO₂ / LN₂) or chart-recorder options
- Lead time and warranty terms
Request a quote to configure voltage, freight, and accessories for the ULF-901C. Because this is a Type-A capital item, checkout is quote-based — our team confirms specification and total delivered cost before order.
