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Freeze Dryer ALPHA 1-4 LD+ (up to 4 kg - 1 compressor)
Freeze Dryer ALPHA 1-4 LD+
Laboratory Freeze Dryer | Up to 4 kg | 1 Compressor | LDplus Display
Based on over 55 years of experience , Martin Christ offers the ALPHA 1-4 LD+ — a compact, high-performance laboratory freeze dryer designed for both routine and specialized freeze-drying procedures. The diverse and laboratory-tested accessory line allows the basic unit to easily handle a variety of processes, from simple bulk drying to advanced vial stoppering and flask drying.
The LDplus (Lyo-Display) operator interface provides consistent, user-friendly, and intuitive control. A graphic LC display shows the most important process data — ice condenser temperature, process time, section time, and vacuum — with comfortable, self-explaining menu guidance in German, English, or French .
Key Features
• Compact, high-performance — requires little space
• Building-block principle for procedural expansion
• High-quality stainless steel inner condenser coils
• Easily accessible ice condenser for defrosting & cleaning
• Visual control of condenser icing during drying
• High thermal insulation — no water condensation
• Drying chamber above condenser for high sublimation
• RS-232 data interface for LyoLog LL-1 software (option)
LDplus Display Functions
• Graphic LC display with clear process data layout
• Ice condenser temperature display
• Process time and section time tracking
• Vacuum level monitoring and control
• Product temperature via vapor pressure curve
• Vacuum control valve for process optimization (option)
Drying Configurations
Configuration
Details
Bulk Drying
5 unheated shelves Ø 360 mm — approx. 0.5 m² drying area
Vial Stoppering
4 shelves Ø 250 mm with stoppering — approx. 0.18 m² (vacuum or nitrogen atmosphere)
Flask Drying
Up to 24 round-bottom flasks with multi-port manifold
Ampoules
Wide-neck filter bottles and ampoules supported
Technical Specifications
Parameter
Value
Product Name
Freeze Dryer ALPHA 1-4 LD+
SKU
ALPHA 1-4 LD+
Ice Condenser Capacity
Max. 4 kg
Ice Condenser Performance
Max. 4 kg / 24 h
Ice Condenser Temperature
Approx. -55°C
Pre-Freezing Temperature
Approx. -25°C (inside ice condenser chamber)
Number of Shelves
5
Shelf Diameter
Ø 250 mm (stoppering) / Ø 360 mm (external)
Shelf Temperature
-25°C
Max. Drying Area (Process A — Stoppering)
4 × 250 mm Ø shelves — approx. 0.18 m²
Max. Drying Area (Process B — External)
5 × 360 mm Ø shelves — approx. 0.5 m²
Round-Bottom Flask Capacity
Max. 24 pieces
Infrared Heater
No
Dimensions (W × D × H)
390 × 415 × 555 mm
Net Weight
42 kg
Power Supply
230 V, 50–60 Hz
Power Consumption
Approx. 1.00 kVA
Operating Temperature
10°C – 32°C
More Information
Infra-Red Heater
No
Ice condenser capacity
max. 4 kg
Ice condenser performance
max. 4 kg/24 h
Ice condenser temperature
Approx. -55°C
Shelf temperature when pre-freezing inside the ice condenser chamber
approx. -25°C
Max. shelf surface area when drying in injection vials with stoppering under vacuum or nitrogen atmosphere (process A)
4 x 250 mm ø shelves. Approx. 0.18 m2
Max. shelf surface area when drying outside the ice condenser chamber (process B)
5 x 360 mm ø shelves. Approx 0.5 m2
Shelves
5
Shelves Temperature
−25°C
Shelves Diameter
ø 250 mm
Drying area
Approx. 0.5 m²
Drying in round bottom flasks
max. 24 pieces
Dimensions
390 x 415 x 555 mm
Net Weight
42 kg
Power Supply
230 V, 50 – 60 Hz
power consumption [W]
Approx. 1.00kVA
Operating Temperature
10°C – 32°C
