Circulating water bath LSRB series

laboratorywith cooling systemrefrigerated

Product overview
LSRB series low-temperature stirred reaction water baths provide controlled low-temperature environments for chemical and biological reactions. Models cover selectable ranges down to -120°C (model dependent). Designed as an alternative to dry ice or liquid nitrogen for controlled reactions in laboratories, hospitals and universities. Available in upright (floor) and chest configurations with optional external circulation and flask racks.

Main features

• Digital temperature setting and display for precise control.
• Fully enclosed magnetic stirrer for stable and contamination-minimized mixing.
• Optional dual stirring to maintain uniform temperature across vessels.
• Adjustable slot cover to reduce refrigerant loss and improve efficiency.
• Integrated lever and supports for burettes, probes and accessories.
• High-reliability international-brand compressor suited to low-temperature operation.
• Convenient bath fluid port for straightforward replacement and maintenance.

Standard type functions

• High-visibility blue LCD control panel.
• 5-stage programmable control for time-sequenced processes.
• Remote computer connection capability for monitoring and logging.
• Temperature over-alarm and protection functions.

Representative images
Photographs illustrate horizontal and upright configurations, example control panels, flask fixtures and circulation connections to guide selection.

Technical specifications (selected highlights)
Models in series: LSRB-4002, LSRB-4010, LSRB-4005, LSRB-3010, LSRB-3050, LSRB-2005, LSRB-4020, LSRB-4030, LSRB-8002, LSRB-8005, LSRB-8020, LSRB-1005, LSRB-1010, LSRB-1020, LSRB-1030, LSRB-1050, LSRB-1205, LSRB-1210, LSRB-1220, LSRB-1230, LSRB-1250. Temperature ranges (examples): -40°C to 99°C; -80°C to RT; -100°C to -60°C; -120°C to -60°C (model dependent). Typical temperature stability: ±0.2°C for many models; select ultra-low variants ±0.5°C or ±2°C. Bath material: SUS304 stainless steel. Bath volumes: typical examples 2 L, 5 L, 10 L, 20 L, 50 L. Bath openings (examples): Ф140×100 mm; Ф210×250 mm; Ф400×280 mm. Flask capacity examples: from 500 mL up to 20,000 mL depending on model. Cooling power: varies with model and setpoint (examples: at 10°C ~290 W up to ~1880 W; at 0°C ~1580 W; at -10°C ~1360 W; at -20°C ~870 W; at -30°C ~450 W; at -40°C values drop and depend on model). Refrigerants: R404a, R22 or mixed refrigerants for ultra-low models. Heating power examples: 300 W, 1,500 W up to 4,500 W on larger models. Circulation: optional external pumping; typical flows ~20 L/min, larger units up to ~30 L/min. Pump head: typically ~5–7 m, larger units 10–12 m.

Safety & construction

• Protections include start-delay, leakage detection, overcurrent and overheating alarms.
• Outer casing: SPCC steel with powder coating for laboratory environments.
• Magnetic stirring with adjustable speed ~100–1000 rpm.
• Recommended ambient operating temperature: 5°C to 25°C.
• Power supply examples: single-phase 220 V/50 Hz; larger models may use 380 V/50 Hz.

Caractéristiques / Spécifications techniques

• Series designation: LSRB Series.
• Brand: Labfreez Instruments.
• Temperature capability: models cover down to -120°C (model dependent).
• Temperature stability: typically ±0.2°C; some ultra-low models ±0.5°C or ±2°C.
• Inner bath: SUS304 stainless steel.
• Bath volumes: 2 L to 50 L (model dependent).
• Bath openings and max flask sizes: multiple Ф×H configurations by model.
• Cooling/heating power: model-dependent; cooling from tens of watts at extreme lows to several kW at higher setpoints; heating typically 300 W to several kW.
• Refrigerants: R404a, R22 or mixed types for ultra-low operation.
• Stirring: magnetic, adjustable 100–1000 rpm.
• Pump/circulation: external circulation optional; flows typically ~20 L/min.
• Lift (pump head): ~5–7 m (larger units up to ~10–12 m).
• Power supply: typically 1-phase 220 V/50 Hz; select units 380 V/50 Hz.
• Dimensions & weight: model-specific (examples: 466×406×420 mm; 580×455×930 mm; weights from ~35 kg to several hundred kg).