The Yamato ULF-501CP is a 400 L (14 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-501CP 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-large −80 °C-class archive for biological samples, reagents, and clinical specimens.
Key Specifications
| Spec | Value |
| Model (focus) | Yamato ULF-501CP (ULF Platinum chest series) |
| Style | Chest / horizontal, top opening |
| Temperature range | −40 °C to −85 °C |
| Capacity | 400 L / 14 cu.ft |
| Rack capacity | 30 |
| 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 | 62 × 20 × 20 in (157 × 50 × 50 cm) |
| External dimensions | 72.5 × 33 × 47.5 in (184 × 83 × 120 cm) |
| Electrical | 115/208/230V 60Hz or 220V 50/60Hz, 1-phase (configured per order) |
Application Profile
Ultra-low storage at −80 °C is the standard for preserving enzymes, cell lysates, tissue, DNA/RNA, and clinical samples, where every freeze-thaw excursion degrades sample integrity. The ULF-501CP holds 400 L at −40 to −85 °C in a top-opening cabinet, so opening the lid sheds less cold than a swinging door — protecting a high-value archive during access (see cold-chain-sample-storage). With 30 rack positions, it suits a growing biobank or core lab that has outgrown a benchtop ULT.
The cascade refrigeration stages two hermetic compressors with the low stage running only on demand, holding system pressure very low to limit heat build-up, dissipating heat through the twin-fan air-cooled condenser, and extending compressor life while holding −85 °C even in warm rooms (see cold-storage-selection). The 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. An automatic timer restarts the unit after a power failure, a gasket heater harness limits frost on the seal, and CO₂/LN₂ back-up is available for critical inventory. Because it is air-cooled, siting requires only clear airflow and ambient control — no cooling-water plumbing.
Frequently Asked Questions
How cold does the ULF-501CP get, and how much does it hold? −40 °C to −85 °C across 400 L / 14 cu.ft with a 30-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 more stable temperatures for a high-value archive.
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-501CP 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 184 × 83 × 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-501CP for your storage program.
ULF Platinum chest ultra-low, by capacity: the ULF-501CP (400 L / 14 cu.ft, −85 °C) is the mid-large chest; drop to the ULF-301CP (255 L / 9 cu.ft) for a bench-scale archive, or step up to the ULF-901CP (766 L / 27 cu.ft, −80 °C) for maximum volume. Choose an upright ULF-701UP when floor space and rack access matter more. All share the Platinum touch-screen controller and networked alarming.
