Yiheng MP-13H Precision Circulating Water/Oil Bath

Overview

The Yiheng MP-13H Precision Circulating Water/Oil Bath is an engineered thermal management system designed for laboratory environments requiring stable, controllable heat transfer to external apparatus or internal sample immersion. Operating on resistive heating and forced convection principles, the MP-13H maintains precise temperature setpoints across a wide operational range—from ambient +5°C up to 100°C—making it suitable for applications in analytical instrument calibration, material testing, enzymatic reaction control, and solvent-based synthesis where consistent thermal input is critical. Its dual-circulation architecture supports both internal bath homogeneity and external temperature delivery via a pressure-assisted circulation pump, enabling integration with jacketed reactors, viscometers, spectrophotometer cells, or other externally cooled/heated devices.

Key Features

• Microprocessor-controlled PID temperature regulation with high-resolution LCD interface ensures repeatable setpoint accuracy and minimal thermal overshoot.
• Heating-only configuration optimized for applications where active cooling is unnecessary or managed separately by auxiliary chillers.
• Dual-mode circulation system: internal recirculation maintains uniform bath temperature; external output port delivers constant-temperature fluid to peripheral equipment at adjustable flow rates.
• Comprehensive safety architecture includes over-temperature cut-off, low-level liquid detection with audible/visual alarm, and automatic heater shutdown upon sensor fault or dry-run condition.
• Programmable multi-stage operation supports complex thermal profiles—up to seven independent programs, each comprising nine definable steps (63 total), with time resolution down to one minute and programmable start/stop scheduling.
• Variable-speed circulation pump allows fine-tuning of flow rate to match thermal load requirements and minimize turbulence-induced measurement interference in sensitive setups.

Sample Compatibility & Compliance

The MP-13H accommodates aqueous and oil-based heat transfer media within its 10.9 L stainless-steel bath chamber, supporting compatibility with common silicone oils (up to 100°C) and water-based solutions. Its construction meets general laboratory equipment safety standards under GB/T 2894–2008 (Chinese national standard for safety signage) and conforms to IEC 61010-1:2010 requirements for electrical safety in laboratory instruments. While not intrinsically rated for hazardous area use, the unit is suitable for GLP-compliant laboratories when operated within defined SOPs. Documentation traceability—including calibration records, maintenance logs, and program execution history—can be maintained manually or integrated into broader lab information management systems (LIMS) via external logging protocols.

Software & Data Management

The MP-13H operates via embedded firmware without proprietary PC software dependency. All programming, real-time monitoring, and alarm status are accessible through its front-panel LCD interface. The controller supports audit-ready manual logging of setpoints, actual temperatures, program stage progression, and alarm events. For facilities requiring electronic record retention, optional RS-232 or analog voltage output modules (sold separately) enable connection to data acquisition systems compliant with FDA 21 CFR Part 11 guidelines—provided appropriate validation procedures and user access controls are implemented at the system level.

Applications

• Calibration of temperature-sensitive analytical instruments including refractometers, densitometers, and digital viscometers.
• Thermal conditioning of samples prior to mechanical or rheological testing (e.g., tensile strength evaluation at elevated temperatures).
• Controlled-temperature reaction baths for organic synthesis, polymerization kinetics, and stability studies under ISO 11348 or ASTM D3924 conditions.
• Heat source for jacketed glass reactors, rotary evaporators, and condenser cooling loops requiring stable inlet fluid temperature.
• Environmental simulation for accelerated aging tests of adhesives, coatings, and encapsulants per IPC-TM-650 or MIL-STD-810 methodologies.

FAQ

Does the MP-13H support refrigeration or cooling functionality?
No—the MP-13H is a heating-only circulating bath. For sub-ambient operation, pairing with an external chiller via the external circulation port is required.
What is the maximum recommended viscosity of heat transfer fluid?
For optimal pump performance and thermal response, fluids with kinematic viscosity below 100 cSt at operating temperature are recommended.
Can the MP-13H be used with flammable solvents?
It is not certified for use with flammable or volatile organic solvents. Only non-flammable, thermally stable media such as deionized water, glycol-water mixtures, or approved silicone oils should be employed.
Is the unit compatible with 24/7 continuous operation?
Yes—designed for unattended long-term operation when installed in well-ventilated spaces and monitored periodically per preventive maintenance schedule.
How is temperature uniformity verified across the bath volume?
Uniformity is maintained through internal baffle design and impeller-driven circulation; users may validate spatial consistency using NIST-traceable PT100 probes placed at multiple locations per ISO/IEC 17025 guidelines.