Ningbo Scientz SC-5A Digital Precision Constant-Temperature Water Bath Circulator

Overview

The Ningbo Scientz SC-5A Digital Precision Constant-Temperature Water Bath Circulator is an engineered thermal management system designed for laboratories requiring stable, reproducible liquid-phase temperature control in the range of ambient +5 °C to 95 °C. Unlike passive water baths, the SC-5A integrates a precision PID-controlled heating module with a low-noise internal circulation pump to ensure uniform thermal distribution across the bath volume—critical for applications where spatial temperature gradients must be minimized (e.g., viscometry calibration, enzyme activity assays, or reference standard equilibration). Its sealed, corrosion-resistant stainless-steel chamber (260 × 140 × 140 mm) accommodates standard laboratory vessels up to 1 L capacity while maintaining tight thermal stability (±0.05 °C typical under steady-state conditions at mid-range setpoints). The unit utilizes environmentally compliant refrigerants only in auxiliary cooling modules (not applicable to SC-5A, as it is heating-only), and all critical components—including temperature sensors, solid-state relays, and pump assemblies—are sourced from internationally certified suppliers to ensure long-term operational reliability.

Key Features

• 7-inch high-contrast tilted touchscreen interface with intuitive icon-based navigation—designed for glove-compatible operation and visibility from benchtop distance
• PID-driven digital temperature regulation with adaptive tuning algorithms to minimize overshoot and stabilize within ±0.05 °C (at 37 °C, load-free condition) to ±0.20 °C across full range
• Programmable countdown timer with auto-shutdown functionality—supports unattended overnight stabilization protocols
• Configurable power recovery mode: user-selectable “auto-restart” or “standby” behavior following mains interruption, preserving experimental integrity
• Adjustable internal recirculation flow rate (0–6 L/min typical range)—enables optimization for low-shear applications such as cell suspension incubation or polymer solution conditioning
• Robust stainless-steel bath tank with seamless welding and electropolished interior—resistant to aqueous corrosion and compatible with mild cleaning agents per ISO 15190 laboratory safety guidelines

Sample Compatibility & Compliance

The SC-5A is compatible with glass, polypropylene, and stainless-steel sample containers commonly used in analytical and life science workflows. Its heating-only architecture eliminates condensation risk and simplifies validation for humidity-sensitive assays. While not intrinsically rated for hazardous location use (e.g., Class I Div 2), the unit complies with IEC 61010-1:2010 for laboratory electrical equipment safety and meets CE marking requirements for EMC (EN 61326-1) and Low Voltage Directive (2014/35/EU). It supports documentation practices aligned with GLP (OECD Principles) and GMP Annex 15 through configurable audit trails when paired with Scientz’s optional RS485/Modbus-enabled data logger (sold separately). Temperature calibration certificates (traceable to NIM, China) are available upon request.

Software & Data Management

The SC-5A operates autonomously via embedded firmware without dependency on PC software. All operational parameters—including setpoint, real-time bath temperature, elapsed time, and pump status—are stored in non-volatile memory with timestamped event logging (last 100 entries). For integration into centralized lab informatics systems, optional RS485 serial output enables Modbus RTU communication for remote monitoring and periodic data export. When connected to validated third-party SCADA or LIMS platforms, the device supports electronic record generation compliant with FDA 21 CFR Part 11 requirements—provided appropriate user access controls and electronic signature protocols are implemented at the host system level.

Applications

• Biochemical assay incubation: maintaining consistent thermal conditions for kinetic studies of protease or kinase activity
• Rheological standardization: providing ISO 17025-compliant temperature environment for rotational viscometer calibration (ASTM D2196, ISO 3219)
• Pharmaceutical QC testing: controlled solubility assessment of active pharmaceutical ingredients (APIs) per USP <721>
• Material science characterization: thermal preconditioning of polymer melts prior to DSC or TGA analysis
• Clinical diagnostics: temperature equilibration of blood gas analyzers and immunoassay reagents in hospital core labs
• Quality assurance in cosmetics R&D: stability testing of emulsions under accelerated aging protocols (ISO 29621)

FAQ

Is the SC-5A suitable for external circulation (e.g., jacketed reactor cooling)?

No—the SC-5A supports internal circulation only. For external loop applications, consider the Scientz SC-10A or SC-20A series, which feature dual-port fluid interfaces and higher pressure-rated pumps.
What is the maximum recommended operating temperature for continuous use?

95 °C is the upper limit specified for sustained operation. Prolonged use above 85 °C may accelerate evaporation and require more frequent deionized water replenishment.
Does the unit support NIST-traceable calibration?

Yes—optional factory calibration with NIM-traceable certificate (CNAS-accredited) is available; users may also perform in-house verification using a calibrated PT100 probe per ISO/IEC 17025 procedures.
Can the touchscreen interface be locked to prevent accidental parameter changes?

Yes—password-protected operator lock mode disables all parameter edits while retaining real-time display and timer countdown functionality.
What maintenance intervals are recommended for optimal performance?

Biannual inspection of pump impeller clearance and annual replacement of the silicone seal ring are advised. Bath fluid should be replaced every 3 months if used continuously with deionized water.