The Yamato ULF-901UP is the largest upright in the ULF Platinum line — an 877 L (31 cu.ft) upright ultra-low freezer reaching −40 °C to −80 °C, organized into five compartments behind four adjustable shelves with a door-mounted touch-screen controller. The Yamato ULF-901UP delivers maximum organized −80 °C capacity on a single footprint, adding Hi/Low alarms with email and SMS notification, USB/FTP data logging, and VNC remote access. It is the upright to specify when a biobank or core facility needs the most vertical cold storage the floor plan will allow.
Key Specifications
| Spec | Value |
| Model (focus) | Yamato ULF-901UP (ULF Platinum upright series) |
| Style | Upright / vertical |
| Temperature range | −40 °C to −80 °C |
| Capacity | 877 L / 31 cu.ft (manifest lists ~30 cu.ft) |
| Shelving | 4 adjustable shelves (5 compartments) |
| Rack capacity | 35 |
| 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 | 42 × 25 × 51.25 in (106 × 63 × 130 cm) |
| External dimensions | 60.5 × 37 × 79.5 in (153 × 93 × 201 cm) |
| Electrical | Configured to order (115 / 208 / 230 / 220V, 50/60 Hz, 1-phase) |
Application Profile
The ULF-901UP answers a specific need: the highest-capacity organized −80 °C storage that still fits through a lab door and against a wall. At 31 cu.ft with 35 rack positions across five inner compartments behind four adjustable shelves, it consolidates a large sample inventory into one upright cabinet, keeping retrieval fast and orderly rather than spread across multiple boxes — and each gasketed inner door limits warming when one section is opened (see cold-chain-sample-storage).
The cascade refrigeration reaches −80 °C by staging two hermetic compressors, with Yamato's low-pressure design and twin-fan air-cooled condenser extending compressor life while dissipating heat without any liquid coolant. At this scale, inventory protection is a design requirement: the door-mounted touch-screen Platinum controller adds email/SMS alarms, downloadable logs, and VNC access to prove the cold chain held and respond before an excursion becomes a loss (see cold-storage-selection), and the battery-backed alarm with power-fail relay, automatic power-failure restart, and optional CO₂/LN₂ back-up guard a large, high-value archive against equipment or utility faults.
Frequently Asked Questions
How cold and how large is the ULF-901UP? −40 °C to −80 °C with 877 L / 31 cu.ft — the largest ULF Platinum upright — and a 35-rack capacity across four adjustable shelves (five compartments).
The manifest says ~30 cu.ft — which is right? The ULF Platinum brochure lists the ULF901UP as 877 L / 31 cu.ft; the ~30 cu.ft figure is a rounding of the same unit. Confirm the exact figure with Yamato if it is contract-critical.
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-901UP is a capital ultra-low freezer sold through a quote. At quote we confirm electrical service (115 V standard, or 208/220/230 V) and adequate branch-circuit current, floor space and door-swing clearance for the 153 × 93 × 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-901UP for your storage program.
ULF Platinum upright ultra-low, by capacity: the ULF-901UP (877 L / 31 cu.ft, −80 °C) is the flagship upright; step down to the ULF-701UP (710 L / 25 cu.ft) or ULF-501UP (505 L / 18 cu.ft) for smaller uprights. Choose a chest ULF-901CP when access-time stability outweighs footprint. All share the Platinum touch-screen controller and networked alarming.
