Ningbo Scientz SC-30B Digital Programmable Circulating Water/Oil Bath Thermostat

Overview

The Ningbo Scientz SC-30B Digital Programmable Circulating Water/Oil Bath Thermostat is an engineered thermal control platform designed for precision temperature maintenance in laboratory and industrial R&D environments. Utilizing a robust heating-only architecture with high-efficiency heat exchange and a closed-loop PID feedback system, the SC-30B delivers stable, uniform thermal conditions across its 14.4-liter working bath—capable of operating from ambient +5°C up to 200°C. Its dual-mode circulation (internal recirculation and external pump-driven flow) enables flexible integration with external equipment such as viscometers, spectrophotometers, reaction vessels, or calibration standards. The unit employs an environmentally compliant refrigerant (R-134a or equivalent) in its auxiliary cooling loop, ensuring low global warming potential (GWP) while maintaining rapid thermal response and long-term operational reliability. Constructed with corrosion-resistant stainless steel bath chambers and critical components sourced from international suppliers, the SC-30B meets functional expectations for ISO/IEC 17025-compliant laboratories requiring traceable, repeatable thermal conditioning.

Key Features

• 7-inch tilted capacitive touchscreen interface with intuitive icon-based navigation—optimized for glove-compatible operation and visibility at bench height
• PID-controlled heating system with adaptive tuning, achieving temperature stability within ±0.05°C (at mid-range) to ±0.2°C (across full span)
• Dual circulation mode: internal convection for bath homogeneity; external port with adjustable flow rate (0–15 L/min typical range) for remote load conditioning
• Programmable timer function with auto-shutdown upon completion—supports unattended overnight operation for standardized protocols
• Power failure recovery logic: user-configurable behavior (resume prior settings or enter standby) preserves experimental integrity during grid interruptions
• Stainless steel bath chamber (304 grade), reinforced insulation, and over-temperature cut-off protection aligned with IEC 61010-1 safety requirements

Sample Compatibility & Compliance

The SC-30B accommodates a broad spectrum of sample containers—including glass beakers (up to Ø200 mm), jacketed reactors, capillary viscometer holders, and immersion probes—without compromising thermal uniformity. Its open-bath geometry supports direct sample immersion or indirect thermal coupling via circulating fluid loops. The device complies with key regulatory frameworks relevant to analytical instrumentation: CE marking per EU Machinery Directive 2006/42/EC and EMC Directive 2014/30/EU; RoHS 2011/65/EU for hazardous substance restriction; and conforms to general laboratory safety standards referenced in ISO/IEC 17025:2017 clause 6.4 (equipment suitability). While not inherently 21 CFR Part 11 compliant, audit trails and parameter logs can be exported for GLP/GMP documentation when integrated with validated LIMS or ELN systems.

Software & Data Management

The SC-30B operates autonomously via its embedded microcontroller and does not require PC connectivity for routine use. All setpoints, timers, and system states are stored in non-volatile memory. For data capture, the unit supports optional RS-485 Modbus RTU communication (with adapter), enabling integration into centralized lab automation platforms. Temperature logging intervals (1–60 s configurable) and real-time setpoint/status streaming are supported for external SCADA or LabVIEW acquisition. Exported CSV files include timestamped bath temperature, setpoint deviation, pump status, and alarm history—facilitating retrospective analysis per ASTM E29–23 (standard practice for using significant digits in test data).

Applications

• Viscosity measurement standardization: providing ISO 3219-compliant thermal environment for rotational and capillary viscometers
• Chemical kinetics studies: maintaining precise isothermal conditions during exothermic/endothermic reaction monitoring
• Biomolecular stability assays: thermal conditioning of enzyme solutions, cell lysates, or protein formulations prior to spectroscopic or chromatographic analysis
• Calibration of temperature-sensitive sensors (e.g., RTDs, thermistors, IR detectors) against NIST-traceable references
• Material testing per ASTM D2196 (rheology of paints) and ASTM D445 (kinematic viscosity of transparent and opaque liquids)
• Pharmaceutical QC workflows including dissolution apparatus water baths (USP ) and stability chamber validation support

FAQ

What is the maximum recommended operating temperature for oil-based media?
The SC-30B is rated for continuous operation up to 200°C; however, actual upper limit depends on thermal stability and flash point of the selected heat transfer fluid—silicone oils (e.g., DC200 series) are recommended above 150°C.
Can the SC-30B cool below ambient temperature?
No—the SC-30B is a heating-only system. It utilizes passive heat dissipation and optional auxiliary cooling assist (via external chiller connection through the external circulation port), but lacks integrated refrigeration.
Is the external circulation pump compatible with aggressive solvents?
The standard pump head is constructed from FKM (Viton®) seals and 304 stainless steel wetted parts, offering resistance to alcohols, hydrocarbons, and silicone oils—but not halogenated solvents or strong acids without custom sealing options.
How is temperature uniformity verified across the bath volume?
Scientz specifies axial/radial uniformity of ≤±0.3°C at 100°C (measured per ASTM E1137/E1137M using nine-point probe mapping); users may validate in-house using calibrated PT100 arrays per ISO/IEC 17025 procedures.
Does the SC-30B support multi-stage temperature ramping?
No—this model implements single-setpoint PID control only. Multi-step profiles require external programmable controllers interfaced via analog input or Modbus commands.