Ningbo Scientz SDC-6 Low-Temperature Constant-Temperature Circulating Bath (Heating & Cooling)

Overview

The Ningbo Scientz SDC-6 Low-Temperature Constant-Temperature Circulating Bath is an engineered thermal management system designed to deliver precise, stable, and reproducible temperature control across a wide operational range—from −5 °C to 100 °C. Based on closed-loop liquid circulation thermodynamics, the unit utilizes a high-efficiency Secop (Germany) hermetic scroll compressor and R-134a refrigerant—selected for its zero ozone depletion potential (ODP) and low global warming potential (GWP)—to achieve balanced heating and cooling performance. Its 7.3-liter stainless-steel bath reservoir serves as both an internal thermal medium and a source for external temperature regulation via dual-mode (internal/external) circulation. The system operates under PID-controlled microprocessor logic, ensuring dynamic response to load variations while maintaining temperature stability within ±0.5 °C and short-term fluctuation at ±0.1 °C—critical for applications demanding thermal consistency over extended durations.

Key Features

• High-reliability Secop sealed compressor with integrated thermal overload and current-limiting protection circuits
• 7-inch angled capacitive touchscreen interface supporting real-time monitoring of bath temperature, setpoint, elapsed time, pump speed, and system status
• Programmable timer function: automatic shutdown upon reaching user-defined run duration
• Configurable power recovery mode: retains all prior settings and allows selection between standby or auto-start after power interruption
• Adjustable circulation pump (0–20 L/min flow rate) with pressure-tolerant design suitable for closed-loop external systems including rotary evaporator condensers and jacketed reactors
• Thermally insulated stainless-steel bath chamber with corrosion-resistant interior finish and spill-resistant rim
• Low-noise operation (<58 dB(A) at 1 m distance), optimized for shared laboratory environments

Sample Compatibility & Compliance

The SDC-6 accommodates aqueous, ethylene glycol–water mixtures, silicone oils, and other non-corrosive heat-transfer fluids compatible with stainless-steel wetted parts. It meets mechanical and electrical safety requirements per IEC 61010-1:2010 and conforms to electromagnetic compatibility standards EN 61326-1:2013. While not certified for medical device use, its architecture supports traceable temperature control workflows aligned with ISO/IEC 17025 accreditation criteria. The system enables GLP-compliant documentation when paired with external data loggers or LIMS-integrated software platforms. It is routinely deployed in laboratories subject to FDA 21 CFR Part 11 readiness assessments due to its parameter retention, event logging capability, and deterministic control behavior.

Software & Data Management

The SDC-6 operates autonomously via embedded firmware without dependency on proprietary PC software. All configuration parameters—including setpoint, ramp rate, hold time, pump speed, and alarm thresholds—are stored in non-volatile memory. Optional RS485 Modbus RTU communication port (available upon request) permits integration into centralized building management systems or SCADA networks for remote supervision and batch-level temperature profiling. For regulatory environments, users may connect third-party validated data acquisition systems to record timestamped temperature traces, enabling full audit trails compliant with ASTM E2877-22 guidelines for liquid bath calibration verification.

Applications

• Condenser cooling for rotary evaporation systems requiring sub-ambient temperatures
• Temperature stabilization of ultrasonic probe assemblies in non-contact cell disruption protocols
• Exothermic/endothermic reaction control in small-scale chemical synthesis and catalysis studies
• Thermal conditioning of biological samples during enzyme kinetics assays or protein folding experiments
• Calibration support for thermocouples, RTDs, and infrared thermometers using NIST-traceable reference baths
• Thermal testing of semiconductor components, PCBs, and optoelectronic devices under controlled ambient conditions
• Material property evaluation—including viscosity, density, and phase transition behavior—in physical chemistry and polymer science labs

FAQ

What types of heat-transfer fluids are compatible with the SDC-6 bath?

Deionized water, 30–50% ethylene glycol/water solutions, and low-viscosity silicone oils (up to 50 cSt at 25 °C) are recommended. Avoid halogenated solvents or strong acids/bases.
Can the SDC-6 maintain temperature stability during external circulation to a 5-meter-long tubing loop?

Yes—when configured for external circulation with appropriate pump flow rate and insulation, the unit maintains ±0.5 °C stability under typical lab load conditions (≤1 kW thermal exchange).
Is the touchscreen interface programmable for multi-step temperature ramps?

No—the SDC-6 supports single-setpoint operation with hold timing. Multi-segment ramping requires external controller integration via RS485 Modbus.
Does the unit include factory calibration documentation?

A basic calibration certificate (covering sensor linearity and setpoint accuracy at three points: 0 °C, 25 °C, and 80 °C) is provided. Full ISO/IEC 17025-accredited calibration is available as an optional service.
How often does the refrigerant require servicing or replacement?

Under normal operating conditions and proper maintenance (e.g., annual condenser coil cleaning), the sealed R-134a system requires no scheduled refrigerant replenishment over its rated service life of ≥10 years.