Deep Freezer −40°C

The ALC-SCIENTIFIC Digital Deep Freezer −40°C is designed for controlled low-temperature storage of laboratory samples, reagents, enzymes, research materials and other temperature-sensitive products whose validated storage requirement falls within the selected operating range. The freezer uses a mechanical refrigeration system, insulated cabinet and digital controller to maintain low chamber temperatures. Depending on configuration, it may include adjustable alarms, storage drawers, inner compartments, access ports, temperature monitoring and lockable doors. Upright and chest-type variants may be offered according to laboratory workflow, storage volume and available floor space. Final temperature performance, capacity and application suitability must be confirmed for the selected model.

• Adjustable low-temperature operation with a reference range of −20°C to −40°C.
• Digital temperature controller with visible chamber-temperature indication.
• Reference factory setpoint of −40°C.
• High- and low-temperature alarm functions in selected configurations.
• Audible and visual alarm indication, model-dependent.
• Manual-defrost refrigeration configuration.
• High-density thermal insulation to reduce heat transfer.
• Lockable insulated outer door or chest lid.
• Upright or chest-type cabinet options.
• Storage drawers, shelves, baskets or inner compartments depending on model.
• Access port for independent monitoring probe or data logger.
• Optional chart recorder, data logger or remote alarm connection.

The Deep Freezer −40°C operates through a mechanical vapour-compression refrigeration cycle. A compressor circulates refrigerant through the condenser, expansion device and evaporator. Heat is absorbed from the freezer chamber at the evaporator and released to the surrounding air through the condenser. A digital temperature controller monitors the internal sensor and controls refrigeration operation to maintain the selected setpoint.

• High-temperature alarm and low-temperature alarm.
• Audible and visual alarm indication, model-dependent.
• Power-failure, sensor-failure and door-open alarms where provided.
• Remote alarm contact and alarm backup battery as optional features.
• Key-operated door lock or password-protected controller.
• Electrical over-current protection and proper earthing.
• Compressor protection and independent monitoring-probe access port.

Final model codes, capacities, dimensions, alarm systems and storage arrangements: To be confirmed.

Accessory compatibility must be confirmed for the selected model.

• Clean external surfaces using a compatible non-abrasive cleaner.
• Disconnect electrical power before cleaning or service work.
• Transfer samples to validated backup storage before defrosting.
• Perform manual defrost when frost affects drawers, seals or chamber performance.
• Do not use sharp tools to remove ice.
• Inspect the door gasket for cracks, gaps, hardening or frost buildup.
• Confirm that the door or lid closes and locks correctly.
• Clean the condenser and condenser filter according to the maintenance schedule.
• Keep ventilation openings free from dust and obstruction.
• Test high-temperature, low-temperature and power-failure alarms periodically.
• Verify displayed temperature using a calibrated independent probe.
• Inspect access-port plugs and confirm that openings remain sealed.
• Minimize unnecessary and prolonged door openings.
• Recalibrate after controller, sensor or major refrigeration repair.