Upright Style Ultra Low Freezers -40°C To -80°C, 31 cu.ft., Manual Defrost Overview
The Upright Style Ultra Low Freezers -40°C To -80°C, 31 cu.ft., Manual Defrost (Yamato Scientific model ULF901U) holds 877 liters of sample storage across a -40°C to -80°C range. Sold by LabSupplies.com as an authorized dealer, this upright laboratory freezer pairs a microprocessor digital controller with audible and visual alarms. Battery-backed alarm protection and remote alarm contacts guard specimens against mechanical or electrical failure.
Cascade refrigeration drives the cooling: two hermetic compressors run CFC- and HCFC-free R-508B and R-404A refrigerants through an air-cooled condenser with two heavy-duty fans, so no liquid coolant is required. A 14-gauge zinc-coated galvanized steel chamber resists corrosion, while the 16-gauge steel exterior wears a powder-coated cool gray finish. Four fixed shelves create five compartments and accept up to 35 racks.
Power options span 115V, 208V, and 230V at 60 Hz single-phase, plus a 220V 50/60 Hz single-phase configuration for international sites. Exterior dimensions measure 60.5" × 37" × 79.5", and the unit ships at 1,325 lbs. Manufactured in the USA and UL Listed, the ULF901U also includes an automatic timer that restarts the freezer after a power failure.
Key Features
- Microprocessor digital control: dual display shows set point and chamber temperature, with a scan button for temperature setting and tamper-proof lockout.
- Battery-operated alarm system: audible and visual signals on mechanical or electrical failure, over- and under-temperature settings, alarm silencing switch, and battery test switch.
- Remote alarm relay: a built-in relay supports remote alarm hook-up for centralized monitoring.
- Cascade refrigeration: two hermetic compressors run CFC- and HCFC-free R-508B and R-404A through an air-cooled condenser, requiring no liquid coolant.
- Automatic power-failure recovery: an integrated timer restarts the unit after a power interruption.
- Storage layout: four fixed shelves form five compartments and accommodate up to 35 racks, plus a standard 1/2" access port.
How to Choose the Right Ultra-Low Freezer
Selecting an ultra-low freezer comes down to matching storage capacity, temperature performance, and site power to your sample workload. Use these criteria to confirm the ULF901U fits your lab.
- Capacity: 877 liters (31 cu.ft.) and a 35-rack limit determine how many cryoboxes or specimen racks you can store before adding a second unit.
- Temperature range: a -40°C to -80°C span covers long-term storage of enzymes, cell lines, and biological samples; verify your protocol's required set point falls inside it.
- Control type: microprocessor digital control with a dual display and tamper-proof lockout supports documented, repeatable set-point management.
- Voltage: 115V, 208V, and 230V 60 Hz options plus a 220V 50/60 Hz build let you match existing facility circuits and international power.
- Footprint: 60.5" × 37" × 79.5" exterior dimensions and a 1,325 lb weight dictate floor space, doorway clearance, and structural load.
- Sample safety: battery-backed alarms, remote alarm contacts, and automatic power-failure recovery protect inventory during outages.
Specifications
| Specification | Detail |
|---|---|
| Capacity | 31 cu.ft. |
| Temperature Range | -40°C to -80°C |
| Defrost | Manual |
| Interior Capacity | 877 L / 31 cu.ft. |
| Rack Capacity | 35 racks |
| Shelving | 4 fixed shelves (5 compartments) |
| Interior Dimensions | 42" × 25" × 51.25" (106 × 63 × 130 cm) |
| Exterior Dimensions | 60.5" × 37" × 79.5" (153 × 93 × 201 cm) |
| Temperature Control System | Digital control with dual display (set point and chamber temperature); scan button for temperature setting; tamper-proof lockout |
| Refrigeration System | Cascade type — two hermetic compressors |
| Refrigerant | CFC-free R-508B and R-404A (CFC- & HCFC-free) |
| Condenser | Air-cooled with two heavy-duty fans; no liquid coolant required |
| Alarm System | Battery-operated alarm emits an audible and visual signal on mechanical or electrical failure; over- and under-temperature settings, alarm silencing switch, and battery test switch; relay provided for remote alarm hook-up |
| Power Failure Recovery | Automatic timer system restarts the unit after a power failure |
| Electrical Requirements | 115V / 208V / 230V, 60 Hz, 1-phase; 220V, 50/60 Hz, 1-phase |
| Optional Accessories | Chart recorder; CO₂ and LN₂ back-up system; racks; cold safety gloves |
| Material | Chamber is 14-ga. Zinc coated galvanized steel. Exterior is 16-ga. steel. Power coated cool gray |
| Country of Origin | USA |
| GTIN (Barcode) | 797059929986 |
| Shipping Weight | 1325 lbs |
| Dimensions (L × W × H) | 67 × 45 × 86 in |
| Component Size | 30 CF |
| Other Certification | UL Listed |
Available Sizes and Configurations
| SKU | Configuration | Pack |
|---|---|---|
| ULF-901U | EA | EA |
Documentation
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Why Buy From LabSupplies.com
LabSupplies.com is an authorized Yamato Scientific dealer, so every ULF901U ships as a genuine unit backed by the manufacturer warranty. Order directly and let our lab-equipment specialists answer spec questions before you commit.
- Authorized Yamato Scientific dealer: genuine equipment with full manufacturer warranty.
- In stock: ready to ship from USA inventory.
- Ships from USA: domestic fulfillment for faster delivery.
- Specialist support: dedicated lab-equipment team for configuration and spec questions.
Frequently Asked Questions
What temperature range does the Yamato ULF901U reach?
The ULF901U operates from -40°C to -80°C. This range supports long-term ultra-low storage of biological samples, cell lines, and temperature-sensitive reagents, with a microprocessor digital controller managing the set point.
How much storage capacity and what dimensions does the ULF901U offer?
The ULF901U provides 877 liters (31 cu.ft.) of interior capacity and holds up to 35 racks across four fixed shelves and five compartments. Interior dimensions are 42" × 25" × 51.25"; exterior dimensions are 60.5" × 37" × 79.5".
What voltage and power configurations are available?
The ULF901U is available in 115V, 208V, and 230V at 60 Hz single-phase, plus a 220V 50/60 Hz single-phase build. Match the configuration to your facility circuit before ordering.
What materials is the freezer built from?
The chamber is 14-gauge zinc-coated galvanized steel for corrosion resistance, and the exterior is 16-gauge steel finished in powder-coated cool gray. Cascade refrigeration uses two hermetic compressors and CFC- and HCFC-free R-508B and R-404A refrigerants.
Does the ULF901U use manual or automatic defrost?
The ULF901U uses manual defrost. An air-cooled condenser with two heavy-duty fans handles heat rejection, so no liquid coolant is required for operation.
How does the freezer protect samples during a power failure?
A battery-operated alarm emits audible and visual signals on mechanical or electrical failure, with over- and under-temperature settings and a relay for remote alarm hook-up. An automatic timer system restarts the unit once power is restored.