The Yamato ULF-401CP is a 340 L (12 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-401CP 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 mid-size −80 °C-class repository for clinics, research groups, and small laboratories building out cold-chain storage.
Key Specifications
| Spec | Value |
| Model (focus) | Yamato ULF-401CP (ULF Platinum chest series) |
| Style | Chest / horizontal, top opening |
| Temperature range | −40 °C to −85 °C |
| Capacity | 340 L / 12 cu.ft |
| Rack capacity | 27 |
| 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 | 55 × 19 × 20 in (139 × 48 × 50 cm) |
| External dimensions | 65.5 × 32 × 47.5 in (166 × 81 × 120 cm) |
| Electrical | 115V / 208V / 230V, 60 Hz, 1 phase (also 220V 50/60 Hz) — confirm at order |
Application Profile
Chest-style ultra-low freezers matter because the top-opening geometry traps dense cold air in the cabinet — when the lid lifts, the ultra-cold layer stays put rather than spilling out an upright door. That translates to steadier internal temperature and faster recovery for repositories opened often. The ULF-401CP applies that principle across 12 cu.ft at −40 to −85 °C, a mid-size footprint that suits clinics, research groups, small laboratories, and hospital rooms building out −80 °C cold-chain storage (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 reaching the deep −85 °C setpoint. 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 heater harness beneath the gasket channel limits frost so the lid seals reliably, and CO₂/LN₂ back-up is available for critical inventory.
Frequently Asked Questions
How cold does the ULF-401CP get, and how much does it hold? −40 °C to −85 °C across 340 L / 12 cu.ft with a 27-rack capacity, delivered by a cascade two-compressor system.
Why choose a chest over an upright at −80 °C? The horizontal, top-opening design keeps the coldest air in the box when opened, giving more stable temperatures for frequently accessed sample repositories.
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-401CP 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 166 × 81 × 120 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-401CP for your storage program.
ULF Platinum chest ultra-low, by capacity: the ULF-401CP (340 L / 12 cu.ft) is the mid-size chest; step up to the ULF-801CP (626 L / 22 cu.ft) for larger repositories, or choose an upright ULF-501UP/601UP when floor space is tighter than lid-clearance headroom. All share the Platinum touch-screen controller and networked alarming.
