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 ULF501U from LabSupplies.com
Upright Style Ultra Low Freezers -40°C To -85°C, 18 cu.ft., Manual Defrost Overview
Cascade refrigeration uses two hermetic compressors and CFC-free R-508B and R-404A refrigerant, cooling the chamber without liquid coolant. Twin heavy-duty fans drive the air-cooled condenser. Chamber walls are 14-gauge zinc-coated galvanized steel; the exterior is 16-gauge steel finished in powder-coated cool gray. Four adjustable shelves create five compartments and hold up to 20 racks.
Key Features
- Cascade refrigeration: two hermetic compressors with CFC-free R-508B and R-404A refrigerant reach -85°C without liquid coolant.
- Digital temperature control: dual display shows set point and chamber temperature, with a scan button for setting and a tamper-proof lockout.
- Battery-backed alarm system: audible and visual signals on mechanical or electrical failure, with over- and under-temperature settings, silencing switch, battery test switch, and a relay for remote alarm hook-up.
- Automatic power-failure recovery: a built-in timer system restarts the unit after a power interruption.
- Configurable storage: four adjustable shelves form five compartments and accept up to 20 racks across 505 L of interior space.
How to Choose the Right Ultra-Low Freezer
Matching an ultra-low freezer to your lab means weighing sample volume, the temperature your protocols demand, and the power available at your site. Review these axes before specifying a unit.
- Voltage and site power: verify whether your circuit is 115V, 208V, or 230V before ordering, since electrical supply dictates installation.
Specifications
| Specification | Detail |
|---|---|
| Capacity | 18 cu.ft. |
| Temperature Range | -40°C to -85°C |
| Defrost | Manual |
| Interior Capacity | 505 L / 18 cu.ft. |
| Rack Capacity | 20 racks |
| Shelving | 4 adjustable shelves (5 compartments) |
| Interior Dimensions | 23" × 26" × 51.25" (58 × 66 × 130 cm) |
| Exterior Dimensions | 40" × 36" × 79.5" (101 × 91 × 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) | 797059929948 |
| Shipping Weight | 900 lbs |
| Shipping Dimensions (L × W × H) | 46 × 43 × 86 in |
| Component Size | 18 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 (this model) | 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 | 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-501U | 797059929948 |
| Manufacturer | Yamato Scientific |
| Manufacturer part number | ULF-501U |
| UNSPSC | 41103000 — Ultra Low Freezer |
| Export classification (ECCN) | EAR99 |
Documents & Downloads
More in This Series
- Yamato ULF301CP Platinum Chest Style Ultra Low Freezers -40°C To -85°C, 9 cu.ft., Manual Defrost
- Yamato ULF501C Chest Style Ultra Low Freezers -40°C To -85°C, 14 cu.ft., Manual Defrost
- Yamato ULF401U Upright Style Ultra Low Freezers -40°C To -85°C, 13 cu.ft., Manual Defrost
- Yamato ULF401C Chest Style Ultra Low Freezers -40°C To -85°C, 12 cu.ft., Manual Defrost
- Yamato ULF201UN Undercounter Ultra Low Freezers -40°C To -85°C, 3 cu.ft., Manual Defrost
- Yamato ULF601C Chest Style Ultra Low Freezers -40°C To -85°C, 17 cu.ft., Manual Defrost
View all Ultra-Low Temperature Freezers →
Frequently Asked Questions
How much storage capacity and how many racks does it hold?
Interior capacity is 505 L (18 cu.ft.) and the freezer holds up to 20 racks. Four adjustable shelves divide the chamber into five compartments, with interior dimensions of 23 × 26 × 51.25 inches.
What electrical supply does the freezer require?
Power options include 115V, 208V, and 230V at 60 Hz single-phase, plus 220V at 50/60 Hz single-phase. Confirm your available circuit before ordering, since site power determines the correct configuration.
What materials is the chamber and cabinet made from?
The chamber is 14-gauge zinc-coated galvanized steel and the exterior is 16-gauge steel finished in powder-coated cool gray. An air-cooled condenser with two heavy-duty fans requires no liquid coolant.
How does the unit protect samples during a power or equipment failure?
A battery-operated alarm emits audible and visual signals on mechanical or electrical failure, with over- and under-temperature settings, a silencing switch, and a battery test switch. A relay supports remote alarm hook-up, and an automatic timer restarts the unit after a power failure.
What is the UNSPSC code for the Yamato ULF501U?
The Yamato ULF501U is classified under UNSPSC 41103000 (ultra low freezer).
Is there a spec sheet or brochure for the Yamato ULF501U?
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 ULF501U have?
Yamato lists these alarms for the ULF501U: 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 ULF501U?
The Yamato ULF501U chamber measures 23" × 26" × 51.25" (58 × 66 × 130 cm) inside (W × D × H).
What refrigeration system does the Yamato ULF501U use?
The Yamato ULF501U 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 ULF501U carry?
Yamato lists the ULF501U as UL Listed.
What optional accessories are available for the Yamato ULF501U?
Yamato offers these options for the ULF501U: chart recorder; CO₂ and LN₂ back-up system; racks; cold safety gloves.
What are the electrical requirements for the Yamato ULF501U?
Yamato specifies 115V / 208V / 230V, 60 Hz, 1-phase; 220V, 50/60 Hz, 1-phase for the ULF501U.
What are the shipping dimensions and weight of the Yamato ULF501U?
Yamato's shipping data lists the ULF501U at 46 × 43 × 86 in and 900 lb packed.
