The Yamato ULF-501UP is a 505 L (18 cu.ft) upright ultra-low freezer reaching −40 °C to −85 °C, organized into five compartments behind four adjustable shelves with a door-mounted touch-screen controller. The Yamato ULF-501UP brings cascade two-compressor refrigeration to a vertical footprint that keeps samples at eye level and easy to inventory, adding Hi/Low alarms with email and SMS notification, USB/FTP data logging, and VNC remote access. It is the upright choice for labs that value organized, walk-up access to a −80 °C collection where floor space is tight.
Key Specifications
| Spec | Value |
| Model (focus) | Yamato ULF-501UP (ULF Platinum upright series) |
| Style | Upright / vertical |
| Temperature range | −40 °C to −85 °C |
| Capacity | 505 L / 18 cu.ft |
| Shelving | 4 adjustable shelves (5 compartments) |
| Rack capacity | 20 |
| Refrigeration | Cascade type, two hermetic compressors |
| Refrigerants | CFC-free R-508B and R-404A |
| Condenser | Air-cooled, two heavy-duty fans (no liquid coolant) |
| Control | Door-mounted touch-screen; set point + chamber temp |
| Alarming | Hi/Low alarm with email + SMS; dry-contact alarm & power-fail relays; battery back-up |
| Data | Temperature graph, USB/FTP logging, VNC remote access, multi-level security |
| Defrost | Manual |
| Access port | ½" porthole (left side) with plug |
| Construction | 14-ga zinc-coated galvanized chamber; 16-ga steel exterior, powder-coated cool gray |
| Power failure | Automatic timer restart |
| Internal dimensions | 23 × 26 × 51.25 in (58 × 66 × 130 cm) |
| External dimensions | 40 × 36 × 79.5 in (101 × 91 × 201 cm) |
| Electrical | Configured to order (115 / 208 / 230 / 220V, 50/60 Hz, 1-phase) |
Application Profile
Upright ultra-low freezers win when organization and retrieval speed matter as much as raw capacity. The ULF-501UP divides its 505 L into five inner compartments behind four adjustable shelves, each with its own gasketed inner door, so opening one section to pull a box does not warm the whole cabinet — a real advantage for shared −80 °C storage where many users reach in daily. That structure suits cell lines, protein and enzyme stocks, nucleic acids, viral banks, and clinical specimens filed by rack and box for fast inventory (see cold-chain-sample-storage).
The cascade refrigeration stages two hermetic compressors with the low stage running only on demand, holding system pressure low, dissipating heat through the twin-fan air-cooled condenser, and extending compressor life while pulling a load down quickly. The door-mounted touch-screen Platinum controller adds the monitoring layer that modern facilities require — email/SMS alarms, downloadable logs, and VNC access to prove the cold chain held and to respond before an excursion becomes a loss (see cold-storage-selection). An automatic timer restarts the unit after a power failure, a gasket heater harness limits frost on the seal, and a ½" access port accepts external probes; CO₂/LN₂ back-up is available for critical inventory.
Frequently Asked Questions
What temperature range and capacity does the ULF-501UP offer? −40 °C to −85 °C in a 505 L / 18 cu.ft upright cabinet with four adjustable shelves across five compartments and a 20-rack capacity.
Why choose an upright over a chest freezer? Uprights keep samples at eye level for fast retrieval and inventory; the five inner-door compartments limit warming when you open one section, which suits high-traffic shared storage in space-constrained labs.
How does it monitor and alarm? A door-mounted touch-screen controller with Hi/Low alarms via email and SMS, dry-contact alarm and power-failure relays, a battery-backed alarm, and downloadable temperature logs (USB/FTP) plus VNC remote access.
What refrigeration does it use? Cascade two-compressor refrigeration with CFC-free R-508B and R-404A and a twin-fan air-cooled condenser — no liquid coolant required — plus automatic restart after a power failure.
Is defrost automatic? No — manual defrost, standard for −80 °C archival storage.
Ordering & Configuration
quote-based. The ULF-501UP is a capital ultra-low freezer sold through a quote. At quote we confirm electrical service (115 V standard, or 208/220/230 V), floor space and door-swing clearance for the 101 × 91 × 201 cm cabinet, shelf/rack configuration, and CO₂/LN₂ back-up needs. Warranty terms are confirmed with the quote, and lead time is provided at quotation. Request a quote to configure the ULF-501UP for your storage program.
ULF Platinum upright ultra-low, by capacity: the ULF-501UP (505 L / 18 cu.ft) is the mid-size upright; step up to the ULF-701UP (710 L / 25 cu.ft) or ULF-901UP (877 L / 31 cu.ft) for larger vertical capacity, or choose a chest ULF-301CP/701CP when door-opening cold retention outranks walk-up access. All share the Platinum touch-screen controller and networked alarming.
