Temporarily unavailable. Yamato Scientific America has temporarily suspended sales of the ULF and LTF freezer series to comply with EPA and CARB refrigerant requirements. Yamato is replacing them with the VUF and VLF series.
Why order the ULF901U from LabSupplies.com
Key Features
- 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.
- 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.
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.
- Voltage: 115V, 208V, and 230V 60 Hz options plus a 220V 50/60 Hz build let you match existing facility circuits and international power.
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 |
| Shipping Dimensions (L × W × H) | 67 × 45 × 86 in |
| Component Size | 30 CF |
| Other Certification | UL Listed |
| Warranty | 1 year (Yamato Scientific America) |
| Service | Calibration and preventive maintenance on site by Yamato-certified technicians or at Yamato's California service center |
Compare ULF Series Models
| Model | Capacity | Temperature range | Racks | Interior (W × D × H) | Exterior |
|---|---|---|---|---|---|
| ULF401U | 13 cu.ft. | -40°C to -85°C | 15 racks | 20" × 22" × 51.25" (50 × 55 × 130 cm) | 35" × 34.5" × 79.5" (88 × 87 × 201 cm) |
| ULF501U | 18 cu.ft. | -40°C to -85°C | 20 racks | 23" × 26" × 51.25" (58 × 66 × 130 cm) | 40" × 36" × 79.5" (101 × 91 × 201 cm) |
| ULF601U | 22 cu.ft. | -40°C to -85°C | 25 racks | 28.5" × 26" × 51.25" (72 × 66 × 130 cm) | 43" × 37" × 79.5" (109 × 93 × 201 cm) |
| ULF701U | 25 cu.ft. | -40°C to -85°C | 30 racks | 34" × 25" × 51.25" (86 × 63 × 130 cm) | 50" × 37" × 79.5" (127 × 93 × 201 cm) |
| ULF801U | 28 cu.ft. | -40°C to -80°C | 30 racks | 38" × 25" × 51.25" (96 × 63 × 130 cm) | 54" × 37" × 79.5" (137 × 93 × 201 cm) |
| ULF901U (this model) | 31 cu.ft. | -40°C to -80°C | 35 racks | 42" × 25" × 51.25" (106 × 63 × 130 cm) | 60.5" × 37" × 79.5" (153 × 93 × 201 cm) |
Ordering Information
| Catalog number | GTIN / UPC |
|---|---|
| ULF-901U | 797059929986 |
| Manufacturer | Yamato Scientific |
| Manufacturer part number | ULF-901U |
| UNSPSC | 41103000 — Ultra Low Freezer |
| Export classification (ECCN) | EAR99 |
Documents & Downloads
More in This Series
- Yamato ULF801U Upright Style Ultra Low Freezers -40°C To -80°C, 28 cu.ft., Manual Defrost
- Yamato ULF701CP Platinum Chest Style Ultra Low Freezers -40°C To -80°C, 21Cu.Ft., Manual Defrost
- Yamato ULF701UP Platinum Upright Style Ultra Low Freezers -40°C To -85°C, 25 cu.ft., Manual Defrost
- Yamato ULF801C Chest Style Ultra Low Freezers -40°C To -85°C, 22 cu.ft., Manual Defrost
- Yamato ULF701C Chest Style Ultra Low Freezers -40°C To -80°C, 21Cu.Ft., Manual Defrost
- Yamato ULF801UP Platinum Upright Style Ultra Low Freezers -40°C To -80°C, 28 cu.ft., Manual Defrost
View all Ultra-Low Temperature Freezers →
Frequently Asked Questions
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.
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.
What is the UNSPSC code for the Yamato ULF901U?
The Yamato ULF901U is classified under UNSPSC 41103000 (ultra low freezer).
Where is the Yamato ULF901U manufactured?
Yamato Scientific lists USA as the country of origin for the ULF901U.
Is there a spec sheet or brochure for the Yamato ULF901U?
Yes. The Yamato ULF Series Ultra-Low Freezer brochure (845 KB PDF) is linked under Documents & Downloads on this page.
Which alarms does the Yamato ULF901U have?
Yamato lists these alarms for the ULF901U: 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.
What are the interior dimensions of the Yamato ULF901U?
The Yamato ULF901U chamber measures 42" × 25" × 51.25" (106 × 63 × 130 cm) inside (W × D × H).
How many storage racks does the Yamato ULF901U hold?
Yamato rates the ULF901U at 35 racks in 877 L / 31 cu.ft. of storage.
What refrigeration system does the Yamato ULF901U use?
The Yamato ULF901U uses cascade type — two hermetic compressors, CFC-free R-508B and R-404A (CFC- & HCFC-free) refrigerant and manual defrost.
What certifications does the Yamato ULF901U carry?
Yamato lists the ULF901U as UL Listed.
What optional accessories are available for the Yamato ULF901U?
Yamato offers these options for the ULF901U: chart recorder; CO₂ and LN₂ back-up system; racks; cold safety gloves.
What are the electrical requirements for the Yamato ULF901U?
Yamato specifies 115V / 208V / 230V, 60 Hz, 1-phase; 220V, 50/60 Hz, 1-phase for the ULF901U.
What are the shipping dimensions and weight of the Yamato ULF901U?
Yamato's shipping data lists the ULF901U at 67 × 45 × 86 in and 1325 lb packed.
