Upright Style Ultra Low Freezers -40°C To -85°C, 18 cu.ft., Manual Defrost Overview
The Upright Style Ultra Low Freezers -40°C To -85°C, 18 cu.ft., Manual Defrost (model ULF501U) is an upright laboratory ultra-low freezer from Yamato Scientific, supplied by LabSupplies.com as an authorized dealer. Rated from -40°C to -85°C with 505 L (18 cu.ft.) of capacity, this unit protects biological samples, reagents, and long-term archives. A microprocessor digital controller and battery-backed alarm system anchor the standard configuration.
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.
Power options cover 115V, 208V, and 230V at 60 Hz single-phase, plus 220V at 50/60 Hz single-phase. Exterior dimensions measure 40 × 36 × 79.5 inches, and the freezer ships at 900 lbs. Built in the USA and UL Listed, it includes remote alarm contacts, automatic power-failure recovery, and a 1/2-inch access port.
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.
- Service access: a 1/2-inch access port supports CO₂ or LN₂ back-up systems and chart recorders as optional accessories.
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.
- Capacity: 505 L (18 cu.ft.) and 20-rack support suit mid-to-large sample libraries; confirm rack format against your current inventory.
- Temperature range: a -40°C to -85°C span covers long-term storage of cells, enzymes, and nucleic acids that fail at warmer setpoints.
- Control type: a digital dual-display controller with tamper-proof lockout protects setpoints in shared facilities.
- Voltage and site power: verify whether your circuit is 115V, 208V, or 230V before ordering, since electrical supply dictates installation.
- Footprint: exterior dimensions of 40 × 36 × 79.5 inches and a 900 lb weight require clearance and adequate floor loading.
- Safety and continuity: battery-backed alarms, remote alarm relays, and automatic power-failure recovery safeguard samples during outages.
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 |
| Dimensions (L × W × H) | 46 × 43 × 86 in |
| Component Size | 18 CF |
| Other Certification | UL Listed |
Available Sizes and Configurations
| SKU | Configuration | Pack |
|---|---|---|
| ULF-501U | EA | EA |
Documentation
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Why Buy From LabSupplies.com
LabSupplies.com is an authorized Yamato Scientific dealer, so every ULF501U ships as a genuine factory unit backed by the manufacturer warranty. Order directly and your freezer leaves USA inventory ready for delivery.
- Authorized Yamato Scientific dealer: genuine equipment with full manufacturer warranty.
- In stock: ready to ship from USA inventory.
- Built in the USA and UL Listed: domestically manufactured and safety certified.
- Lab-equipment specialists: available for spec and configuration questions.
Frequently Asked Questions
What temperature range does the ULF501U cover?
The ULF501U operates from -40°C to -85°C. This cascade refrigeration system uses two hermetic compressors and CFC-free R-508B and R-404A refrigerant to reach ultra-low setpoints for long-term biological and reagent storage.
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.
Is this a manual or automatic defrost freezer?
The ULF501U is a manual defrost freezer. Manual defrost helps maintain stable interior temperatures and minimizes warm-up cycles that can affect sensitive stored samples.
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.