The Yamato ULF-901CP is the largest chest in the ULF Platinum line — a 766 L (27 cu.ft) chest-style ultra-low freezer reaching −40 °C to −80 °C, built with cascade two-compressor refrigeration and touch-screen control. The Yamato ULF-901CP pairs quick pull-down with the full Platinum monitoring suite — Hi/Low alarms with email and SMS notification, USB/FTP data logging, and VNC remote access — and its top-opening chest geometry keeps dense cold air in the box on every lid opening. It consolidates a high-capacity −80 °C biorepository into a single cabinet for core labs.
Key Specifications
| Spec | Value |
| Model (focus) | Yamato ULF-901CP (ULF Platinum chest series) |
| Style | Chest / horizontal, top opening |
| Temperature range | −40 °C to −80 °C |
| Capacity | 766 L / 27 cu.ft |
| Rack capacity | 48 |
| 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 | Touch-screen; displays 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 | 67 × 23 × 31.25 in (170 × 57 × 79 cm) |
| External dimensions | 98 × 36 × 43.5 in (248 × 91 × 110 cm) |
| Electrical | 115/208/230V 60Hz or 220V 50/60Hz, 1-phase (configured per order) |
Application Profile
When a lab's sample archive outgrows a standard −80 °C box, the answer is either more units or a larger one. The ULF-901CP consolidates storage into a single 766 L chest with a 48-rack capacity, cutting the number of compressors, alarms, and monitoring points a facility has to maintain. For a biorepository, the chest format is a feature: opening the lid loses far less cold air than swinging an upright door, protecting the whole inventory during retrievals (see cold-chain-sample-storage).
The cascade refrigeration runs at low internal pressure to limit heat build-up and extend compressor life, with an energy-saving low stage that engages only on demand and heat rejected through the twin-fan air-cooled condenser — no cooling water. The 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 controls frost along the seal, and CO₂/LN₂ back-up is available for critical collections.
Frequently Asked Questions
How cold and how large is the ULF-901CP? −40 °C to −80 °C with 766 L / 27 cu.ft and a 48-rack capacity — the largest chest in the ULF Platinum line.
Why −80 °C rather than −85 °C? The 27 cu.ft ULF901CP is rated to −80 °C; if your protocol requires −85 °C, choose a smaller chest such as the ULF-501CP (14 cu.ft, −85 °C).
What monitoring does the Platinum package include? A touch-screen controller with dual set-point/chamber display, Hi/Low alarms via email and SMS, dry-contact alarm and power-failure relays, a battery-backed alarm, a viewable temperature graph, USB/FTP data logging, and 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-901CP 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 condenser-airflow clearance for the 248 × 91 × 110 cm cabinet, rack configuration for the 48-rack capacity, 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-901CP for your storage program.
ULF Platinum chest ultra-low, by capacity: the ULF-901CP (766 L / 27 cu.ft, −80 °C) is the high-volume flagship chest; drop to the ULF-501CP (400 L / 14 cu.ft, −85 °C) for a mid-large archive. Choose an upright ULF-701UP when floor space and door access dominate. All share the Platinum touch-screen controller and networked alarming.
