Yi Heng MPG-10C Refrigerated & Heated Circulating Bath

Overview

The Yi Heng MPG-10C Refrigerated & Heated Circulating Bath is an engineered thermal management system designed for precise, stable, and bidirectional temperature control in laboratory and industrial R&D environments. Based on Couette-flow circulation principles and integrated refrigeration–heating thermodynamic architecture, the unit delivers continuous, uniform thermal energy transfer via a closed-loop fluid circuit. Unlike passive water baths, the MPG-10C actively circulates temperature-controlled medium (water, water–glycol mixtures, or silicone oil) both internally and externally—enabling direct thermal coupling with external equipment such as spectrophotometer cells, reaction jackets, viscometer sleeves, or environmental test chambers. Its operational range of −10 °C to +100 °C accommodates cryogenic sample conditioning, enzymatic assay stabilization, polymer melt characterization, and accelerated stability testing—making it suitable for ISO/IEC 17025-compliant calibration labs and GLP-regulated pharmaceutical development workflows.

Key Features

• High-efficiency dual-mode thermal system integrating hermetically sealed compressor cooling and high-wattage resistive heating for seamless transition across sub-zero to near-boiling setpoints.
• Microprocessor-based PID controller with real-time digital display, adjustable ramp rate, and programmable hold functions—ensuring repeatability within ±0.2 °C under steady-state load conditions.
• Stainless-steel inner bath (240 × 170 × 200 mm) with electropolished finish for corrosion resistance and easy decontamination; compatible with aqueous and low-viscosity organic heat-transfer fluids.
• Integrated centrifugal circulation pump delivering 4 L/min flow at ≤2.5 bar head pressure, supporting external loops up to 15 m in length with minimal thermal lag.
• Comprehensive safety architecture including dry-run detection, liquid-level monitoring, over-temperature cutoff, and automatic power-down upon fault recognition—fully compliant with IEC 61010-1 safety requirements for laboratory equipment.

Sample Compatibility & Compliance

The MPG-10C supports immersion-based thermal equilibration of glassware (e.g., volumetric flasks, jacketed reactors), metal probes (e.g., conductivity sensors, RTD arrays), and modular analytical modules requiring auxiliary temperature control. It meets mechanical and electrical safety standards per EN 61010-1 and is routinely deployed in settings requiring adherence to ASTM E2877 (Standard Guide for Thermal Validation of Liquid Baths), USP (Temperature Calibration), and ISO 17025 clause 6.4.2 (Equipment Verification). While not inherently 21 CFR Part 11–validated, its controller logs timestamped setpoint and actual temperature data—enabling manual audit trail generation when paired with external validated data acquisition systems.

Software & Data Management

The MPG-10C operates autonomously via front-panel interface; no proprietary software is required for basic operation. However, analog voltage output (0–5 V DC) and RS232 serial port enable integration with third-party SCADA platforms (e.g., LabVIEW, MATLAB, or DeltaV) for remote monitoring, automated setpoint scheduling, and long-term thermal profile logging. All internal event logs—including alarm triggers, power cycles, and sensor deviations—are retained in non-volatile memory for post-hoc review during internal quality audits or regulatory inspections.

Applications

• Calibration of thermometers, thermocouples, and RTDs against NIST-traceable references in metrology laboratories.
• Thermal preconditioning of polymer samples prior to DSC or TGA analysis per ASTM D3418 and ISO 11357.
• Temperature-dependent kinetic studies in enzymology and biocatalysis (e.g., Michaelis–Menten assays at controlled 4–40 °C ranges).
• Stabilization of optical components in UV-Vis and FTIR spectrometers to minimize thermal drift in absorbance baselines.
• Support of accelerated shelf-life testing per ICH Q1A(R2), where precise thermal stress profiles are applied to pharmaceutical formulations.

FAQ

What types of heat-transfer fluids are compatible with the MPG-10C?

Deionized water, 30% ethylene glycol–water mixtures (for sub-zero operation), and low-viscosity silicone oils (up to 100 cSt) are recommended. Avoid halogenated solvents or high-acidity fluids that may corrode stainless steel or degrade seals.
Can the unit maintain ±0.2 °C stability while supplying external equipment?

Yes—when external loop volume remains ≤8 L and ambient temperature is stable (±2 °C), the system maintains ±0.2 °C at the bath sensor and ±0.5 °C at the external load inlet under typical 2–3 L/min flow conditions.
Is the MPG-10C suitable for GMP manufacturing environments?

It is widely used in pre-production R&D and QC labs supporting GMP processes; however, final qualification (IQ/OQ/PQ) must be performed per site-specific protocols and documented against user requirement specifications (URS).
Does the unit include documentation for regulatory submissions?

Factory calibration certificates (traceable to national standards) and CE/ROHS declarations are provided. Full validation packages (e.g., 21 CFR Part 11 compliance kits) require optional add-ons and site-specific implementation support.