WDF-86V728E 728L Cascade -86°C Ultra Low Temperature Freezer
New-Generation 728L cascade -86°C ultra-low freezer. Two SECOP compressors share the load with redundancy — if one fails, the other holds near -70°C. High-capacity storage (728 litres, up to 50,400 vials) with VIP + PURF insulation and a 7-inch touch controller for hospitals, biobanks and large research facilities.
Capacity
728L
Temperature
-40°C to -86°C
ISO 9001, ISO 13485, ISO 14001 Certified
Quick Enquiry
We typically respond within 2 business hours.
New Generation · More efficient, more economical.
Why the New-Generation 728L ULT
Super Cooling Performance
Pulls down to −80 °C in around 3 hours for fast, dependable sample protection.
Advanced Insulation
Vacuum Insulation Panels plus high-density PU foam and improved door sealing minimise cold loss.
Intelligent 7″ Controller
Eye-level colour touch screen with live temperature graphs, status and parameter monitoring.
CFC-Free & Durable
Eco-friendly mixed-gas refrigerant with a sturdy, anti-corrosion cabinet built for long service life.
Performance
Two SECOP compressors share the refrigeration load so the WDF-86V728E pulls down fast and, if one compressor ever fails, the other holds the chamber near −70 °C.
247 min
Pull-down to −80 °C
292 min
Hold-over / warm-up
23 min
Recovery to −75 °C
Intelligent 7″ Controller
- Eye-level 7-inch colour LCD touch screen for intuitive, no-stoop operation
- Live temperature display with on-screen graphs and trend history
- Freezer status and operating parameters monitored at a glance
- Complete alarm system protects valuable bio-samples
- USB port for one-click temperature-data download and audit logs
- Humanised details: quick-release filter, one-hand handle, file-box holder
Optimised Interior
- Deep door-frame design reduces cold-air leakage and ice build-up
- Low-temperature inner-door gaskets lock the cold air inside
- Internal Vacuum Insulation Panels for superior thermal stability
- Stainless-steel compartment doors with thick foam insulation
- Vacuum-release port allows quick re-access to samples
- Detachable inner doors lift out for easy cleaning
Features & Capabilities
Proven Reliability
- Dual SECOP compressors share the cooling load
- Redundancy: one compressor holds ≈-70°C if the other fails
- Direct cooling with mixed-gas (R4001) refrigerant
- 7-inch LCD touch screen with data logging
Safety Systems
- High/low temperature alarms
- Power-failure alarm with 72h backup
- Sensor, voltage, door-ajar & filter alarms
- Audible and visual alerts
- USB data export
Energy Efficiency
- VIP + PURF vacuum insulation
- Load-sharing compressors improve efficiency
- Direct-cooling design
Key Design Features
- -40°C to -86°C range
- High 728L capacity, up to 50,400 vials
- Deep door frame & detachable inner doors
- 3 stainless-steel shelves
Technical Specifications
| Parameter | Value |
|---|---|
| Type | -86°C ULT Freezer (Cascade, 2 Compressors) |
| Temperature Range | -40°C to -86°C |
| Capacity | 728 L (25.7 cu.ft) |
| Compressor | SECOP ×2 |
| Refrigerant | R4001 mixed gas (CFC-free) |
| Cooling Type | Direct cooling |
| Defrost | Manual |
| Insulation | VIP + PURF |
| Power | 1400 W |
| Rated Current | 10.37 A |
| Power Consumption | 23.44 kWh/24h |
| Voltage / Frequency | 220 V / 50 Hz |
| Noise Level | 50 dB |
| Pull-down Time (to -80°C) | 247 min |
| Warm-up / Hold-over Time | 292 min |
| Recovery (to -75°C) | 23 min |
| Display | 7-inch LCD touch screen |
| Temperature Sensor | PT100 |
| Shelves | 3 stainless-steel shelves |
| Interior Material | Stainless steel |
| Exterior Material | Color-sprayed steel |
| Ambient Temperature | 10°C to 32°C |
| Exterior (W×D×H) | 1229 × 1012 × 1994.5 mm |
| Interior (W×D×H) | 963 × 571 × 1350 mm |
| Package (W×D×H) | 1320 × 970 × 2185 mm |
| Net / Gross Weight | 374 / 394 kg |
| Sample Capacity | 504 × 2" boxes / 50,400 × 2 ml vials |
| Rack Configuration | N3J-254D ×18 + N3J-264D ×6 |
| Power-failure Backup | 72 h |
| Access Port | 1 × 25 mm |
| USB Port | Yes |
| Castor | Yes |
| Compartment Doors | 2 |
| Chart Recorder | Optional |
| Certifications | ISO 9001, ISO 13485, ISO 14001 |
Sample Storage Capacity
50,400
2 ml vials
504
2″ boxes
N3J-254D ×18 + N3J-264D ×6
Stainless cryo-racks
Accessories & Options
Extend the WDF-86V728E with monitoring, back-up and storage accessories.
CO₂ / N₂ back-up system
OptionalInjects CO₂ or LN₂ to hold temperature if power is lost.
Temperature chart recorder (6″)
OptionalDocuments temperature over time on a physical chart.
4G / WiFi data logger
OptionalCloud monitoring of internal temperature from anywhere.
Stainless-steel cryo-racks
N3J-series racks sized to the chamber.
Cryo-boxes & cryo-tubes
2-inch boxes and 2 ml vials for organised storage.
Cryo safety gloves
OptionalProtect hands when handling ultra-cold samples.
Ice scraper
Quick frost removal during maintenance.
Additional shelves
OptionalAdjustable stainless shelving for custom layouts.
Water-cooling system
OptionalReduces heat radiation and widens ambient tolerance.
Remote alarm / RS485-BMS interface
OptionalConnects to building management / monitoring systems.