Ningbo Scientz SC-25 Digital Programmable Circulating Bath

Overview

The Ningbo Scientz SC-25 Digital Programmable Circulating Bath is a precision-engineered thermal control system designed for laboratory environments requiring stable, uniform, and programmable liquid temperature regulation. Operating on the principle of forced convection via an integrated circulation pump, the SC-25 maintains consistent thermal conditions in both internal bath vessels and externally connected apparatus—such as viscometers, spectrophotometer cells, reaction jackets, or material testing fixtures. Its heating-only architecture (no active refrigeration) is optimized for applications where sustained elevated temperatures up to 200 °C are required without sub-ambient cooling. The unit employs PID-based microprocessor control with real-time feedback from high-stability Pt100 sensors, delivering temperature stability within ±0.05 °C under optimal load conditions and maintaining ±0.1 °C typical fluctuation across the full operational range (ambient +5 °C to 200 °C). Constructed with corrosion-resistant stainless steel tanks and sealed, low-outgassing fluid pathways, the SC-25 ensures long-term reliability in demanding chemical, pharmaceutical, and materials science workflows.

Key Features

• 25-liter stainless steel bath reservoir with polished interior surface for easy cleaning and minimal contamination risk
• 7-inch tilted capacitive touchscreen interface with intuitive icon-driven navigation and real-time graphical display of setpoint, actual temperature, elapsed time, and pump status
• Dual-mode circulation: selectable internal recirculation (for bath homogeneity) or external output (up to 30 L/min flow rate, adjustable via digital pump control)
• PID auto-tuning algorithm adapts to changing thermal loads—ensuring rapid stabilization after setpoint changes or sample insertion
• Configurable power recovery mode: retains user-defined parameters and allows selection between automatic restart or standby state following mains interruption
• Compliant refrigerant (R-134a or equivalent) used exclusively in auxiliary cooling circuits (where integrated heat dissipation modules are present), meeting EU F-Gas Regulation Annex I requirements
• Over-temperature and dry-run protection circuits certified to IEC 61010-1:2010 safety standards

Sample Compatibility & Compliance

The SC-25 accommodates a broad spectrum of sample containers—including glass jacketed reactors (up to Ø200 mm), Ubbelohde viscometer baths, calorimetry cells, and OEM-integrated analytical platforms. Its external circulation port supports standard 1/2″ BSP or NPT fittings, enabling seamless integration into GLP-compliant systems. While not intrinsically rated for hazardous area use, the unit complies with CE marking directives (2014/30/EU EMC, 2014/35/EU LVD) and meets ISO/IEC 17025-relevant environmental monitoring criteria when operated within specified ambient conditions (15–30 °C, <80% RH non-condensing). It is routinely deployed in laboratories adhering to ASTM D445 (kinematic viscosity), USP (compounding environment support), and ISO 17025-accredited quality control protocols.

Software & Data Management

The SC-25 operates autonomously via embedded firmware; no PC connection is required for routine operation. However, optional RS485 (Modbus RTU) or USB-to-serial interfaces enable integration with centralized lab management software (e.g., LabWare LIMS, Thermo Fisher SampleManager) for audit-trail generation. All temperature logs—including timestamps, setpoints, deviations, and alarm events—are stored internally for ≥30 days and exportable via USB flash drive in CSV format. Data integrity conforms to ALCOA+ principles: attributable, legible, contemporaneous, original, accurate, complete, consistent, enduring, and available—supporting FDA 21 CFR Part 11 readiness when paired with validated third-party electronic record systems.

Applications

• Viscosity measurement standardization per ASTM D2196 and ISO 3219 using rotational or capillary viscometers
• Thermal conditioning of biological samples prior to PCR, ELISA, or enzyme kinetics assays
• Controlled heating of reagent solutions in clinical chemistry analyzers and immunoassay platforms
• Stability testing of cosmetic emulsions and topical formulations under ISO 11607-1 accelerated aging protocols
• Calibration of platinum resistance thermometers (PRTs) and thermocouples against NIST-traceable references
• Supporting ASTM E2251 phase transition studies in polymer characterization workflows

FAQ

Does the SC-25 support refrigeration or only heating?
The SC-25 is a heating-only circulator. It achieves temperatures from ambient +5 °C to 200 °C using resistive heating elements and does not incorporate active cooling components.
Can the SC-25 maintain ±0.05 °C stability across its entire temperature range?
Temperature stability of ±0.05 °C is achievable under low-thermal-load conditions near mid-range setpoints (e.g., 40–80 °C); at extremes (e.g., 200 °C or near ambient), stability typically falls within ±0.1–±0.2 °C due to increased ambient coupling and sensor response dynamics.
Is the unit compatible with oil-based heat transfer fluids?
Yes—the SC-25 is rated for use with silicone oils, mineral oils, and other non-corrosive heat transfer media up to 200 °C, provided fluid viscosity remains below 1000 cSt at operating temperature.
What safety certifications does the SC-25 carry?
It bears CE marking compliant with IEC 61010-1:2010 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and fulfills electromagnetic compatibility per EN 61326-1:2013.
How is calibration traceability established for this instrument?
The factory calibration uses NIST-traceable Pt100 reference probes; users may perform field verification using accredited secondary standards—full calibration certificate documentation is provided upon request.