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The BR-03A Recirculating Chiller is the compact entry model of the BR Series — delivering precise, stable temperature-controlled coolant circulation from -20°C to +20°C in a 5L stainless steel bath format specifically suited for compact laboratory setups, single rotary evaporator support, material testing temperature control, and small-scale chemical and pharmaceutical process cooling. With 530W of cooling capacity at 10°C, 230W at 0°C, an R404A refrigerant system, PID temperature controller with programmable multi-step control, PT100 sensor, LCD display, independent circulation pump delivering 6 L/min at up to 9 m head, and DIN 12880 compliant independent over-temperature protection — the BR-03A provides professional-grade recirculating chiller performance in a compact 210 × 410 × 511 mm footprint with casters. Enquire about the BR-03A today.
AvailableThe BR-03A Recirculating Chiller delivers compact 5L precision cooling from -20°C to +20°C with PID controller, programmable multi-step control, PT100 sensor, independent circulation pump, corrosion-resistant stainless steel bath, preset ON/OFF timing, and DIN 12880 compliant safety — providing stable, accurate coolant circulation for laboratory rotary evaporation, chemical processing, material testing, and cell culture cooling applications.
The BR-03A's PID (Proportional–Integral–Derivative) temperature controller continuously monitors the bath temperature via the PT100 resistance temperature sensor and modulates the compressor and heating outputs to maintain the setpoint with ±2°C accuracy across the full -20°C to +20°C operating range. The PID control eliminates the temperature oscillations of simple on/off thermostat control — providing stable, reproducible coolant delivery temperatures throughout extended connected process operations and preventing the thermal cycling that causes condensation and temperature fluctuations in connected analytical instruments.
The BR-03A's programmable multi-step controller enables operators to pre-define sequential temperature setpoints and transition protocols — supporting automated cooling ramp profiles, temperature hold sequences, and defined setpoint transitions for complex laboratory protocols. In rotary evaporation and chemical process cooling applications where the optimal coolant temperature changes as the operation progresses (e.g., as solvent composition changes during evaporation), the multi-step control automates temperature adjustments without requiring continuous manual intervention at the chiller.
The BR-03A's independent circulation pump delivers 6 L/min flow rate at up to 9 m maximum head through the Φ10 mm interface connections — providing the sustained coolant delivery required for effective heat transfer at the connected equipment's heat exchanger or condenser. The independent pump circuit ensures consistent coolant flow regardless of compressor cycling — maintaining stable coolant delivery to connected equipment throughout the full operating cycle without the flow interruptions that occur in single-circuit designs during compressor on/off transitions.
The BR-03A's 5L storage tank is constructed from corrosion-resistant stainless steel — providing durability and resistance to the ethylene glycol/water mixtures, silicone heat transfer fluids, and deionised water commonly used as coolant media in laboratory recirculating chillers. The 240 × 150 × 150 mm liquid tank opening accommodates standard laboratory sample vessel immersion formats alongside the external circulation connections — enabling the BR-03A to serve as both a direct immersion cooling bath and an external circulation coolant source.
The BR-03A's preset ON/OFF timing function enables scheduled automated start and stop of the chiller operation — allowing the unit to begin cooling automatically at a programmed start time before the operator's arrival (pre-cooling the connected system to the required temperature), and to shut down automatically at the end of a defined operating period. This scheduling capability supports laboratory workflow optimisation — enabling rotary evaporator systems to be pre-cooled to the condenser setpoint before the operator's working session begins, reducing preparation time and energy consumption during off-hours.
The BR-03A's liquid level viewing window allows operators to verify the coolant level in the 5L bath without opening the tank — providing continuous visual monitoring of bath liquid volume throughout operation. Maintaining adequate liquid level is critical for recirculating chiller performance: insufficient coolant reduces the thermal mass available for heat absorption, reduces pump flow rate due to inlet cavitation, and can cause pump damage from dry-running. The viewing window enables periodic liquid level checks without interrupting the cooling operation.
The BR-03A is designed for maintenance-free routine operation — with sealed refrigerant circuit, no lubrication requirements, corrosion-resistant stainless steel bath, and clean surface design that facilitates easy exterior cleaning. The maintenance-free design is practical for busy laboratory environments where instrument servicing diverts operational time — the BR-03A's routine maintenance is limited to periodic coolant level monitoring, coolant replacement at defined intervals, and exterior cleaning, without the oil management, filter replacement, and mechanical service requirements of more complex cooling systems.
The BR-03A Recirculating Chiller incorporates four independent safety systems — temperature deviation alarm, over-current protection, DIN 12880 compliant independent over-temperature protection, and liquid level viewing window monitoring — providing comprehensive protection for safe laboratory cooling operation across the full -20°C to +20°C range.
The BR-03A activates an alarm when the bath temperature deviates beyond the configured threshold from the setpoint — alerting operators to cooling system performance issues, excessive heat load from the connected process, or coolant level problems affecting the chiller's temperature control capability. In a laboratory recirculating chiller supplying coolant to a rotary evaporator condenser, temperature deviation alerts enable corrective action before the condenser temperature rise causes solvent recovery efficiency to decline below acceptable levels.
The BR-03A's over-current protection circuit monitors the compressor and pump motor current draw and activates protective shutdown if the current exceeds the safe operating limit — protecting the electrical components from damage caused by compressor overload, pump obstruction, or electrical supply voltage anomalies. At 550W total power, the over-current protection is the primary electrical safety mechanism ensuring that compressor and pump motor overload conditions cannot cause sustained electrical component damage during unattended laboratory cooling operation.
The BR-03A's independent over-temperature protection system operates as a completely separate circuit from the primary PID temperature controller — monitoring bath temperature and activating protective shutdown if the temperature exceeds the safe upper limit regardless of the primary controller state. DIN 12880 compliance of this independent protection confirms that the safety architecture meets the internationally recognised standard for laboratory thermostat safety — providing documented assurance of independent backup protection appropriate for unattended laboratory cooling operations.
The liquid level viewing window provides continuous passive safety monitoring of the bath coolant level — enabling operators to verify that adequate coolant volume is maintained for safe pump and compressor operation throughout extended cooling sessions. Adequate coolant level is a safety prerequisite for recirculating chiller operation: insufficient coolant causes pump cavitation, reduces cooling efficiency, and can cause compressor overheating from inadequate heat transfer medium.
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