The Yamato ULF-301CP is a 255 L (9 cu.ft) chest-style ultra-low freezer reaching −40 °C to −85 °C, built on the ULF Platinum platform with cascade two-compressor refrigeration and touch-screen control. The Yamato ULF-301CP 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 is a bench-to-benchtop −80 °C-class archive for cell lines, tissue, serum, enzymes, and other biologicals.
Key Specifications
| Spec | Value |
| Model (focus) | Yamato ULF-301CP (ULF Platinum chest series) |
| Style | Chest / horizontal, top opening |
| Temperature range | −40 °C to −85 °C |
| Capacity | 255 L / 9 cu.ft |
| Rack capacity | 16 |
| 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 | 46 × 16 × 20 in (116 × 40 × 50 cm) |
| External dimensions | 57.5 × 29 × 46.5 in (146 × 73 × 116 cm) |
| Electrical | Configured to order (115 / 208 / 230 / 220V, 50/60 Hz, 1-phase) |
Application Profile
Ultra-low storage is a sample-integrity decision. Below roughly −80 °C, molecular and enzymatic activity is effectively arrested, which is why cell lines, primary tissue, DNA/RNA, and reference sera are archived at these temperatures. The ULF-301CP holds 255 L at −40 to −85 °C in a top-opening cabinet, so opening the lid sheds less cold than a swinging door — the conservative choice for the most valuable archives, where dense cold air stays in the box and temperature excursions during access stay small (see cold-chain-sample-storage). At 9 cu.ft with 16 rack positions, it suits a research group, clinic, or small biobank standardizing on −80 °C 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 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 ½" access port accepts external probes, and CO₂/LN₂ back-up is available for critical inventory.
Frequently Asked Questions
How cold does the ULF-301CP get, and how much does it hold? −40 °C to −85 °C across 255 L / 9 cu.ft with a 16-rack capacity, delivered by a cascade two-compressor system.
Why choose a chest over an upright at −80 °C? The top-opening chest loses less cold air on access because dense cold air stays in the box, giving smaller temperature excursions — preferred for the most valuable archives.
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 an 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-301CP 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 ventilation clearance for the 146 × 73 × 116 cm cabinet, 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-301CP for your storage program.
ULF Platinum chest ultra-low, by capacity: the ULF-301CP (255 L / 9 cu.ft) is the bench-scale chest; step up to the ULF-701CP (594 L / 21 cu.ft) or ULF-801CP (626 L / 22 cu.ft) for institutional volume, or choose an upright ULF-501UP when floor footprint outweighs access stability. All share the Platinum touch-screen controller and networked alarming.
