Complete Meling ULT Buying Guide
Meling Biomedical · Ultra-low temperature storage
Compare four Meling ultra-low temperature freezers, from compact 50 L and 110 L cabinets to 530 L and 780 L uprights with two independent refrigeration systems.
Where should you start? Consider DW-HL50 or DW-HL110V when a compact cabinet matches your storage requirement. Consider DW-HL530 or DW-HL780 when you need greater capacity and the additional protection of two independent refrigeration systems. All four models have a listed operating range of −40°C to −86°C. Choose the storage temperature required by your material, validated method or laboratory protocol.1, 2, 3, 4
Product images are not shown to a common physical scale.
Compare the complete Meling ULT lineup
Begin with the capacity and cabinet format your laboratory needs. Then compare the refrigeration design, storage configuration and available installation space. These are also central purchasing considerations in professional ULT selection guidance.5
| Model | Capacity | Format | Refrigeration | External W × D × H |
|---|---|---|---|---|
| DW-HL50 | 50 L | Compact / undercounter | One SECOP compressor | 951 × 700 × 757 mm |
| DW-HL110V | 110 L | Compact / undercounter | One inverter compressor | 978 × 662 × 815 mm |
| DW-HL530 | 530 L | Upright | Two independent systems; inverter compressors | 930 × 1,041 × 1,947 mm |
| DW-HL780 | 780 L | Upright | Two independent systems; inverter compressors | 1,205 × 1,025 × 1,955 mm |
External dimensions describe the cabinet, not the full installation envelope. Confirm ventilation clearances, door access and service access using the current instructions for the quoted model.1, 2, 3, 4
The DW-HL50 is the smallest option by nominal capacity and uses a digital display. The DW-HL110V offers 110 L and a 10-inch high-definition touch screen in a compact format. The DW-HL530 and DW-HL780 provide larger upright storage, three stainless steel shelves and 10-inch high-definition touch screens.1, 2, 3, 4
All four use direct cooling, manual defrost and vacuum insulation panels (VIP) combined with polyurethane (PU) insulation. Interior materials differ: DW-HL50 uses SUS430-grade stainless steel; DW-HL110V lists a galvanized interior with stainless steel optional; DW-HL530 and DW-HL780 list stainless steel interiors. Confirm the chosen configuration and plan routine care around the current product instructions.1, 2, 3, 4
What do two independent refrigeration systems provide?
The defining feature of the DW-HL530 and DW-HL780 is their two independent refrigeration systems, identified as systems A and B. Meling states that if one compressor fails, the other independent system can maintain the freezer at −80°C.3, 4
Cabinet access
Inside the DW-HL780
The model-specific interior view shows the shelves and insulated inner doors.
Two systems in one ULT cabinet
Conceptual explanation of the documented architecture, not an engineering schematic.
This design adds redundancy for the documented compressor-failure scenario. It does not supply electricity during a site power outage. Display/alarm batteries, backup power and emergency storage arrangements address different needs and should be considered separately.
For the single-compressor failure scenario, alarm scope and purchase questions, see Two Independent Refrigeration Systems in Meling ULT Freezers.
Compare usable storage by rack and box position
Nominal capacity helps you shortlist a cabinet, but your actual inventory depends on the rack, box, vial and cap combination. The supplied sheets list the following storage configurations.1, 2, 3, 4
Storage layout
See the DW-HL110V rack arrangement
Use the rack, box and vial configuration alongside nominal capacity when planning your inventory.
| Model | Racks | Boxes | 2 mL cryovials |
|---|---|---|---|
| DW-HL50 | 2 | 36 | 3,600 |
| DW-HL110V | 6 | 72 | 7,200 standard; 9,000 with the shelf removed |
| DW-HL530 | 16 | 400 | 40,000 |
| DW-HL780 | 24 | 600 | 60,000 |
For DW-HL110V, keep the configuration distinction: 7,200 cryovials is the standard listed arrangement; 9,000 applies with the shelf removed. Before ordering accessories, confirm compatibility with your actual boxes, vial dimensions and required access arrangement. Listed storage counts do not establish that every nominal 2 mL vial will fit.
Understand monitoring, logging and battery support
All four current product listings include Monitor for remote high/low temperature alarms and viewing of 24-hour temperature history. The built-in data logger has its own recording interval and retention specification, shown below.1, 2, 3, 4
Controls and access
DW-HL530 touchscreen detail
The existing product image shows the touch screen and access panel. Logging and battery specifications are compared below.
| Model | Display | Logging and USB export | Display/alarm battery |
|---|---|---|---|
| DW-HL50 | Digital | Every 10 minutes; 100,000 records | At least 48 hours |
| DW-HL110V | 10-inch HD touch screen | Every 5 minutes; 10-year recording period | 8 hours |
| DW-HL530 | 10-inch HD touch screen | Every 5 minutes; 10-year recording period | 8 hours |
| DW-HL780 | 10-inch HD touch screen | Every 5 minutes; 10-year recording period | 8 hours |
These battery durations refer to the temperature display and alarms during a power failure. They are not refrigeration runtime or a validated sample holdover time. Confirm the monitoring connection, notification workflow and site requirements when discussing your quotation.
Read performance figures with their test conditions
Performance data are most useful when the setpoint, ambient temperature and door-opening procedure are stated. The following figures are reported in the supplied Meling documentation at a −80°C setpoint and 25°C ambient temperature. Recovery figures follow a 60-second door opening.
| Metric | DW-HL50 | DW-HL110V | DW-HL530 | DW-HL780 |
|---|---|---|---|---|
| Energy use | 7.936 kWh/24 h | 4.48 kWh/24 h | 7.3 kWh/24 h | 8.5 kWh/24 h |
| Pull-down to −80°C | 98 min | 100 min | 185 min | 280 min |
| Recovery after a 60-second opening | 14.5 min | 17.5 min | 35 min | 52 min |
| Temperature uniformity | 2.1°C | ≤4°C | 2.5°C | 3.1°C |
| Temperature fluctuation | 1.7°C | ≤2°C | 5.3°C | 3.1°C |
Typical manufacturer internal/prototype test data, as described by the supplied documentation. Actual performance depends on site conditions and use. The stated setpoint and ambient temperature do not, by themselves, establish that all other test details were identical. These figures are not independent comparative testing or guaranteed operating costs.1, 2, 3, 4
Cabinet uniformity describes differences across measurement locations at a given time. Stability describes the temperature range at an individual sensor over the test period. Check how each supplier defines fluctuation before comparing it with a stability result.6
Use energy figures alongside capacity and the storage configuration you need. A cabinet’s daily kWh figure alone does not determine which freezer is the better fit for your laboratory. Review the full specification rather than selecting on a single number.
Confirm cabinet fit and electrical configuration
Measure the intended location and the delivery route, including doors, lifts and turning space. Use the packaged dimensions when planning delivery, and confirm the manufacturer’s installation clearances before assuming a compact model will fit beneath a particular counter.
The supplied sheets list an operating ambient range of 16°C to 32°C for all four models. The DW-HL110V sheet lists both 110–120 V and 220–240 V configurations at 50/60 Hz; its model name does not identify one universal electrical version. Confirm the exact supply configuration for every quoted unit and have your facility assess the applicable electrical connection.1, 2, 3, 4
Warranty and service support
3-year whole-unit limited warranty
5-year compressor limited warranty
Meling ULT freezers purchased through Solution Instruments are covered under the published Meling Biomedical Limited Warranty & Service Policy, subject to its conditions and any expressly applicable written terms.
During the first three years, coverage includes covered replacement parts and reasonable repair labour for confirmed defects in materials or workmanship. During years four and five, coverage is limited to confirmed compressor defects and includes the replacement compressor, removal and installation, required brazing and sealed-system work, and refrigerant needed for the covered replacement.
The compressor warranty does not extend coverage for unrelated components beyond three years. Solution Instruments coordinates technical diagnosis and determines the appropriate service method under the policy.
Prepare your shortlist and quotation request
- Required storage conditions: your protocol’s target temperature and any application-specific requirements.
- Inventory: current and expected box/vial counts, actual container dimensions and preferred organization.
- Space and delivery: the installation area, delivery address, access restrictions and route measurements.
- Electrical and monitoring needs: available supply, alarm workflow and any site-specific requirements.
- Preferred model and quantity: include accessory requirements so the complete configuration can be confirmed.
Choose your next step
Review the four current models or send your requirements to Solution Instruments for help confirming the configuration, pricing, availability and delivery requirements.
Request a quoteBrowse Meling ULT freezersFor manufacturer background and purchasing support, read Why Choose Meling Biomedical Through Solution Instruments?
Frequently asked questions
Do all four Meling ULT models have two independent systems?
No. DW-HL50 and DW-HL110V each have one compressor. DW-HL530 and DW-HL780 have two independent refrigeration systems.
Does the battery keep the freezer cooling during an outage?
The listed battery specification supports the display and alarms. It does not establish continued refrigeration. Discuss backup power and emergency storage arrangements appropriate to your laboratory.
Does DW-HL110V hold 9,000 cryovials in its standard configuration?
The standard listed configuration is 6 racks, 72 boxes and 7,200 2 mL cryovials. The 9,000 figure applies with the shelf removed.
Specifications and sources
- meling-biomedical-dw-hl50-specification-sheet.pdf. Product information: DW-HL50.
- meling-biomedical-dw-hl110v-specification-sheet.pdf. Product information: DW-HL110V.
- meling-biomedical-dw-hl530-specification-sheet.pdf. Product information: DW-HL530.
- meling-biomedical-dw-hl780-specification-sheet.pdf. Product information: DW-HL780.
- PHCbi. 5 Tips to Help You Select the Right ULT Freezer. General purchasing considerations.
- U.S. Environmental Protection Agency. ENERGY STAR Version 2.0 Laboratory Grade Refrigerators and Freezers specification. Definitions of uniformity and stability; not evidence that Meling used the same test protocol.
- Solution Instruments. Meling Biomedical Limited Warranty & Service Policy.
Technical references and buying guidance reviewed November 3, 2026. Confirm the current model, configuration and applicable terms in your quotation.