The UCF-101B is the deep-cold member of Yamato's UCF undercounter/countertop freezer series — a 90 L (3.2 cu.ft.) solid-door lab and pharmacy freezer reaching an adjustable -20°C to -40°C / -4°F to -40°F using R290 refrigerant. It shares the digital control, alarm suite, and 90 L cabinet of the sister UCF-101A but trades the -10 to -25°C band for storage down to -40°C, making it the right pick where samples require colder holding than a standard -20°C or -25°C freezer can provide, still in an undercounter footprint.
Key Specifications
| SKU | UCF-101B (model UCF101B) |
| Type | Undercounter / countertop lab & pharmacy freezer, solid door |
| Capacity | 90 L / 3.2 cu.ft. |
| Temperature range | -20°C to -40°C / -4°F to -40°F |
| Temperature control | Digital display |
| Alarm system | High / low temperature, door ajar, power failure, low battery, sensor failure, USB failure |
| Data logging | Yes, adjustable intervals |
| Data download | Yes, via USB, PDF format |
| Min / max temperature | Yes, display and reset |
| Alarm relay | Yes, dry contacts |
| Back-up battery | Yes, powers alarm only |
| Refrigerant | R290 |
| Air circulation | Direct cooling |
| Defrost | Manual |
| Shelves | 2 adjustable shelves, base shelf |
| Access port | 1" diameter |
| Insulation | US EPA and SNAP approved (urethane foam) |
| Compressor | Hermetic compressor |
| Door | Solid, lockable (keyed) |
| Legs / casters | 2 front leveling legs, 2 rear casters |
| Exterior / interior | Painted steel / painted aluminum |
| Internal dimensions (WxDxH) | 20" x 19.5" x 24.25" (50 x 49 x 61 cm) |
| External dimensions (WxDxH) | 24" x 24" x 33" (61 x 61 x 83 cm) |
| Weight | 165 lbs. |
| Voltage | 115V, 60 Hz, 1 phase |
| Amperage (line / running) | 15 Amp dedicated / 4.19A |
| Supply plug | NEMA 5-15 |
| Certification | UL listed |
| Optional accessories | Chart recorder, cold safety gloves |
Application Profile
The UCF-101B fits deep-cold documented storage where -40°C holding is the requirement in an undercounter footprint. It suits -40°C sample banking for reagents, biologicals, and specimens that degrade at -20°C but do not require ultra-low (-80°C) storage, and enzyme or diagnostic reagent storage demanding colder-than-standard holding to preserve activity. For a documented deep-cold cold chain, USB PDF export supplies auditable records while the back-up battery keeps alarms live through outages, and the full high/low, door-ajar, power-failure, and sensor-failure alarm suite protects critical inventory. The unit is mobile on 2 rear casters and lockable on 2 front leveling legs for space-constrained placement.
For -25°C-and-warmer storage at the same 90 L volume, choose the sister UCF-101A. Note this model uses R290 rather than the family's R600a.
Design Architecture
Refrigeration. A hermetic compressor with R290 hydrocarbon refrigerant provides direct cooling to the adjustable -20°C to -40°C range, drawing ~4.19A running — the higher current reflecting the deeper-cold duty. US EPA / SNAP-approved insulation stabilizes the 90 L cabinet. The unit is UL listed.
Control, monitoring, and documentation. A digital display manages the setpoint. Alarms cover high/low temperature, door ajar, power failure, low battery, sensor failure, and USB failure; min/max display and reset; data logging runs at adjustable intervals; records download via USB in PDF format; a back-up battery powers the alarm circuit only; and a dry-contact relay supports external monitoring.
Cabinet and access. Painted-steel exterior, painted-aluminum interior, 2 adjustable shelves plus a base shelf, and a 1" access port. The keyed lockable solid door secures contents; 2 front leveling legs and 2 rear casters provide roll-and-lock mobility. Defrost is manual.
Electrical. Standard 115V, 60 Hz, single-phase power on a 15 Amp dedicated line via NEMA 5-15 plug.
Frequently Asked Questions
How cold does the UCF-101B get? It holds an adjustable -20°C to -40°C (-4°F to -40°F).
What's the difference between the UCF-101B and the UCF-101A? They share the same 90 L cabinet, but the UCF-101B reaches -40°C using R290 refrigerant, while the UCF-101A covers -10 to -25°C with R600a. Choose the -101A for -25°C-and-warmer storage.
Can I export temperature records? Yes — data logs at adjustable intervals and downloads via USB in PDF format. A back-up battery keeps the alarm live during outages (it powers the alarm circuit only).
What power does the UCF-101B require? 115V, 60 Hz, single-phase on a dedicated 15 Amp circuit via a NEMA 5-15 plug, drawing about 4.19A running.
Is the UCF-101B certified? Yes — it is UL listed.
Ordering & Configuration
Each UCF-101B ships complete: cabinet, 2 adjustable shelves + base shelf, keyed lock, digital controller with alarms/logging/USB-PDF download, back-up alarm battery, dry-contact relay, 2 front legs + 2 rear casters, and NEMA 5-15 cord. Chart recorder and cold safety gloves are optional accessories.
Confirm at quote:
- -40°C holding is genuinely required (vs. -25°C sister UCF-101A) and R290 refrigerant is acceptable for the site.
- Documentation regime — USB PDF download, back-up alarm battery, relay integration.
- Dedicated 15 Amp, 115V circuit availability (note higher 4.19A running draw), plus the 24" x 24" x 33" footprint and caster/fixed placement.
- Lead time and warranty per Yamato standard capital-equipment terms.
UCF undercounter/countertop freezer family:
- UCF-000 — 42 L / 1.5 cu.ft., -20°C, mechanical thermostat, no alarms
- UCF-001 — 48 L / 1.7 cu.ft., -15 to -25°C, digital + alarms + data logging
- UCF-101A — 90 L / 3.2 cu.ft., -10 to -25°C, digital + USB PDF download (R600a)
- UCF-101B (this product) — 90 L / 3.2 cu.ft., -20 to -40°C, digital deep-cold (R290)
