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The muffle furnaces L 3/11 - LT 60/12 have been proven for daily laboratory use. These models stand out for their excellent workmanship, advanced and attractive design, and high level of reliability.

Standard Equipment
• Heating from two sides by ceramic heating plates (heating from three sides for muffle furnaces L 24/11 - LT 60/12) for an optimal temperature uniformity
• Temperature uniformity of +/− 5 K with closed fresh-air inlet in empty work space according to DIN 17052-1 at working temperatures above 800 °C
• Thermocouple type S (1200 °C)
• Ceramic heating plates with integral heating element which is safeguarded and easy to replace
• With lift door (LT)
• Dual shell ventilated housing made of textured stainless steel sheets for low surface temperature and high stability
• Exclusive use of insulation materials without categorization according to EC Regulation No 1272/2008 (CLP). This explicitly means that alumino silicate wool, also known as “refractory ceramic fiber” (RCF), which is classified and possibly carcinogenic, is not used.
• Adjustable air inlet integrated in door (see illustration)
• Exhaust air outlet in rear wall of furnace
• Controller with touch operation C550
• Solid state relays provide for lownoise operation

Option
• Chimney, chimney with fan or catalytic converter (not for L 1 and L 15)
• Over-temperature limiter with adjustable cutout temperature as temperature limiter to protect the furnace and load
• Protective gas connection to purge with non-flammable process gases (not available in combination with chimney, chimney with fan or catalytic converter) not gas tight
• Manual or automatic gas supply system
• Port for thermocouple in the rear wall or in the furnace door

Insert for optimum loading of test tubes, height 100 mm.
• Area of application: reprocessing laboratory glassware
• For use with APLW 043 lid

Laboratory refrigerators and freezers are expected to provide the highest level of safety and reliability. The precise electronic control, forced-air cooling system, and highly efficient insulation ensure exceptional energy efficiency, leading to low operating costs while safeguarding the environment. The advanced components and precise regulation ensure the optimal storage of materials over the long term.

Product Features

Easy Operation
User-friendly solutions for daily use

• Full-height integrated handle
• 2.4” color electronic interface with touch & swipe functionality
• Easy-to-clean stainless steel interior
• Flush-mounted, full-height internal side LED lighting

Safety and Reliability

• Ventilated cooling system
• NoFrost cooling technology
• Temperature range: -9 °C to -35 °C
• Temperature stability: ±5 °C maximum
• VCC variable speed compressor
The variable speed compressors ensure the right performance is always available. This results in reduced energy consumption and improved temperature stability.
• Optical and acoustic alarms in case of failure
• SafetyDevice: prevents the temperature from dropping below +2 °C, avoiding freezing
• PT1000 product temperature sensor
In addition to the built-in control sensor, another temperature sensor is available to measure simulated product temperature. The value measured by the product temperature sensor can also be displayed on the screen. The value can be calibrated, and the device’s alarm thresholds will then be based on this value, ensuring safer storage based on real product temperature values.
• Power failure alarm
In case of a power outage, the built-in battery maintains power for at least twelve hours, activating an immediate audible and visible alarm. Additional indication of the start of the power outage and the maximum temperature reached is also provided.
• LightAlarm
If the internal temperature rises unchecked, the door is left open, or other issues occur, the internal lighting will begin to flash.
• Alarm history: Simple quality control
The last 10 alarms, including key data like date and maximum temperature, are logged for final quality assessment of stored goods.
• Built-in data logger: traceable for years
Complete traceability independent of monitoring systems through logging of the temperature profile, alarm history, and service information for up to 5 years. Stored data can be read via USB port.
• Door automatically closes if opened less than 90°
• Probe access port: 1 x Ø 12 mm
• Electronic locking system: protection against unauthorized access with PIN or remote lock/unlock capability
• SmartLock: automatic door locking in case of temperature alarm, which can only be unlocked by authorized personnel
• Long lifespan

Compliance and Documentation

• Complies with DIN 13277 and IEC 61010-2-011
Liebherr laboratory and pharmaceutical refrigeration units meet all the characteristics and performance criteria necessary for full compliance with the DIN 13277 standard. DIN 13277 specifies requirements and test procedures for refrigeration and freezer equipment used in laboratories and for storing pharmaceuticals.
• IEC 60068-3 standard for temperature distribution and consistency
• IEC 61010-2-011 standard for safety
• Temperature adjustment (calibration)
• Recording of minimum/maximum temperature values
• Integrated connectivity (LAN or WiFi for BMS or SmartMonitoring system)

Technical Specifications

• Gross/net volume: 1391/1091 l
• External dimensions (W/D/H): 1427/867/2135 mm
• Internal dimensions (W/D/H): 1210/638/1470 mm
• White, stainless steel external casing
• Door/Cover material: steel
• Adjustable shelves: 8
• Shelves: plastic-coated grates
• Usable shelf size, mm (W/D): 570 / 788
• Shelf load capacity: 60 kg
• Door opening: right fixed / left fixed
• Castors with arrestor at the front, fixed castors at the rear
• Gross/net weight: 235/210 kg
• Energy consumption/year: 1162 kWh
• Ambient temperature: +10 °C to +35 °C
• Heat emission: 1485 kJ/h
• Refrigerant: R 290
• Noise level: 60 dB(A)
• Frequency / voltage: 50/60 Hz / 220-240 V~a

Insert for optimum loading of test tubes, height 130 mm.
• Area of application: reprocessing laboratory glassware
• For use with APLW 043 lid

Users expect laboratory refrigerators and freezers to provide the highest levels of safety and reliability. The precise electronic control, forced-air cooling system, and highly efficient insulation together result in outstanding energy savings, keeping operating costs low while ensuring environmental protection. The advanced components and precise regulation work together to ensure optimal storage of materials.

Product Features

Easy Operation
User-friendly solutions for everyday use

• Built-in handle spanning the full height of the door
• Monochrome, 3-touch electronic control panel
• Easy-to-clean, stainless steel interior
• Door stays open at angles greater than 90°
• Flush-mounted internal ceiling LED lighting

Compliance and Documentation
Built-in safety features to protect sensitive materials

• Temperature setting (calibration)
• Logging of minimum/maximum temperature values
The device records the minimum and maximum internal temperatures, which are easily readable on the display
• Connectivity for retrofitting (LAN or WiFi for BMS or SmartMonitoring systems)
• Standard compliance: IEC 60068-3, IEC 61010-2-011

Safety and Reliability
Reliable storage due to consistent cooling performance, even under extreme ambient temperature conditions

• Temperature stability: ±3 °C for refrigerator / ±5 °C for freezer
• Alarm relay
Transmits alarms to the monitoring system / ensures no deviations go unnoticed
• The door automatically closes if the opening angle is less than 90°
• Probe access port with a diameter of 10 mm
• Mechanical door lock
• Long service life

Technical Specifications

• Gross/net capacity: 1391/1091 liters
• External dimensions (W/D/H) mm: 1427/867/2135
• Internal dimensions (W/D/H) mm: 1210/638/1470
• Energy consumption/year: 464 kWh
• Ambient temperature: +10 °C to +35 °C
• Heat emission: 1420 kJ/h
• Refrigerant: R 290
• Noise level: 60 dB(A)
• Frequency/voltage: 50 Hz / 220-240 V~
• Ventilated cooling system
• Automatic defrost
• Temperature range: -9 °C to -30 °C
• External casing/color: steel / white
• Internal lining: Chrome-nickel steel (1.4301 / AISI 304)
• Door/Cover material: steel
• Network connectivity via SmartModule / retrofittable
• WLAN/LAN port: optional
• Number of adjustable shelves: 8
• Shelf material: steel with plastic coating
• Usable shelf size (W/D) mm: 480/638 mm
• Shelf load capacity: 60 kg
• Castors with arrestor at the front, fixed castors at the rear
• Probe access port: 1 x Ø 12 mm
• Door opening direction: left fixed / right fixed
• Gross/net weight: 225/200 kg

Insert for optimum loading of test tubes, height 200 mm.
• Area of application: reprocessing laboratory glassware
• For use with APLW 043 lid

Lid for APLW 040–042 inserts
• Area of application: reprocessing laboratory glassware

Separation net for dividing the footprint in the APLW 042.
• Area of application: reprocessing laboratory glassware

For optimum loading of injector modules or inserts
• For use on levels 1 to 4
• Basket with two docking connections
• For loading up to 2 injector modules or inserts
• Automatic closing of the connections when not in use
• Clearances dependent on which baskets are used and their position

Injector nozzle with plastic support, conical, Ø 2.5, length 80 mm.
• Area of application: reprocessing laboratory glassware
• Suitable e.g. for measuring cylinders, flasks and test tubes
• Suitable for standard mobile injector units and injector baskets
• Including nozzle cap, Ø 4 mm

Machine affiliation: Can be used for PLW 6111 devices.

• Height adjustable for optimum loading of inserts
• For use on levels 2 to 4
• Open front
• With integrated spray arm
• Clearances dependent on which baskets are used and their position

Injector nozzle with plastic support, conical, and spring holder, Ø 2.5, length 80 mm.
• Area of application: reprocessing laboratory glassware
• Suitable e.g. for measuring cylinders, flasks and test tubes
• Suitable for standard mobile injector units and injector baskets
• Including nozzle cap, Ø 4 mm

Machine affiliation: Can be used for PLW 6111 devices.

• For use on level 1
• Vertical clearance dependent on other baskets used
• Clearances: width 507 mm, depth 545 mm

With the help of high-quality Ohaus Frontier rotors and adapters, you can find the best solution for both basic and high-performance sample preparation needs.

Injector nozzle with plastic support, conical, Ø 2.5, length 50 mm.
• Area of application: reprocessing laboratory glassware
• Suitable e.g. for measuring cylinders, flasks and test tubes
• Suitable for standard mobile injector units and injector baskets
• Including nozzle cap, Ø 4 mm

Machine affiliation: Can be used for PLW 6111 devices.

Basket for optimum loading of injector modules or inserts
• For use on level 1
• Equipped with a special injector nozzle
• Equipped with a holding frame

With the help of high-quality Ohaus Frontier rotors and adapters, you can find the best solution for both basic and high-performance sample preparation needs.

Injector nozzle with plastic support, star-shaped, Ø 2.5, length 80 mm.
• Area of application: reprocessing laboratory glassware
• Suitable e.g. for measuring cylinders, flasks and test tubes
• Suitable for standard mobile injector units and injector baskets
• Including nozzle cap, Ø 4 mm

Machine affiliation: Can be used for PLW 6111 devices.

With the help of high-quality Ohaus Frontier rotors and adapters, you can find the best solution for both basic and high-performance sample preparation needs.

Injector nozzle with plastic support, star-shaped, Ø 2.5, length 155 mm.
• Area of application: reprocessing laboratory glassware
• Suitable e.g. for measuring cylinders, flasks and test tubes
• Suitable for standard mobile injector units and injector baskets
• Including nozzle cap, Ø 4 mm

Machine affiliation: Can be used for PLW 6111 devices.