The ULF-501U is a upright-style (vertical) ultra-low freezer in Yamato's STANDARD ULF Series, providing 505 L (18 cu.ft.) of vertical, footprint-efficient sample storage rated to -40°C to -85°C / -40°F to -121°F. Interior organization is by 4 adjustable (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: 20 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-501U |
| Style | Upright-style (vertical) |
| Temperature range | -40°C to -85°C / -40°F to -121°F |
| Capacity | 505 L (18 cu.ft.) |
| Rack capacity | 20 racks |
| Shelving | 4 adjustable (5 compartments) |
| Interior dimensions (W×D×H) | 23" x 26" x 51.25" / 58 x 66 x 130 cm |
| Exterior dimensions (W×D×H) | 40" x 36" x 79.5" / 101 x 91 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 505 L (18 cu.ft.), the ULF-501U suits 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. It is equally at home holding vaccines, reagents, and enzymes that require validated ultra-low temperatures. Its footprint-efficient upright format, with vertical access and adjustable shelving, speeds sample retrieval where floor space is at a premium.
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: 20 racks (4 adjustable (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-501U reach? The ULF-501U is rated -40°C to -85°C (-40°F to -121°F), driven by a cascade refrigeration system with two hermetic compressors for rapid pull-down and stable holding.
How much storage does the ULF-501U provide? It offers 505 L (18 cu.ft.) of upright, footprint-efficient storage, with a rated capacity of 20 racks organized across 4 adjustable shelves (5 compartments).
What voltages is the ULF-501U available in? Published electrical options are 115V / 208V / 230V at 60Hz single-phase, and 220V at 50/60Hz single-phase. Voltage and plug configuration are confirmed on quote.
Does the ULF-501U have an alarm system? Yes. A battery-operated alarm gives 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.
Why is the ULF-501U quote-based? It is capital cold-storage equipment shipped by LTL freight; pricing, voltage/plug configuration, freight, and lead time are confirmed on quote.
Ordering & Configuration
The ULF-501U 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.
This unit is rated -40°C to -85°C / -40°F to -121°F; confirm your temperature target against that envelope, and note lead time and warranty terms on the formal quote. 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
Request a quote to configure voltage, freight, and accessories for the ULF-501U. Because this is a Type-A capital item, checkout is quote-based — our team confirms specification and total delivered cost before order.
