Yiheng MP-C / MPG-C / MPE-C Series Refrigerated & Heated Circulating Baths

Overview

The Yiheng MP-C / MPG-C / MPE-C Series Refrigerated & Heated Circulating Baths are precision-engineered temperature control systems designed for demanding laboratory applications requiring stable, bidirectional thermal regulation. Operating on a dual-mode thermodynamic principle—combining vapor-compression refrigeration with resistive heating—the baths deliver accurate and repeatable temperature control across a wide operational range (model-dependent, typically −20 °C to +100 °C). Engineered for integration into analytical workflows, material testing setups, and calibration protocols, these units maintain thermal homogeneity through high-efficiency internal circulation, minimizing spatial gradients within the bath chamber. The system architecture supports both standalone operation and seamless integration with external equipment—such as spectrophotometers, viscometers, or reaction blocks—via standardized fluid ports and pressure-rated circulation lines.

Key Features

• Microprocessor-based PID temperature controller with large-backlit LCD interface, enabling setpoint resolution of 0.1 °C and real-time display of actual bath temperature, setpoint, and operational status.
• Hermetically sealed, imported scroll-type compressor delivering low-noise operation (<58 dB[A]), rapid cooldown rates, and energy-efficient performance across ambient conditions (15–30 °C).
• Dual-safety protection system: independent high-temperature and low-temperature alarm circuits with audible/visual alerts, plus level-sensing circuitry to prevent dry-run damage to the heater and pump.
• High-head, corrosion-resistant circulation pump with adjustable speed control (0–100% flow modulation), ensuring consistent flow delivery to external devices while maintaining internal thermal uniformity.
• Stainless-steel inner tank (304 grade) with reinforced insulation layer, minimizing heat loss and supporting long-term stability under continuous operation.
• Standardized quick-connect fluid ports (G1/4″ BSP) for secure, leak-resistant coupling to external jackets or Peltier modules.

Sample Compatibility & Compliance

These circulating baths accommodate aqueous solutions, silicone oils, ethylene glycol/water mixtures, and other non-corrosive heat-transfer media compatible with stainless-steel wetted parts. Units comply with IEC 61010-1:2010 safety standards for laboratory electrical equipment and incorporate grounding continuity, overcurrent protection, and reinforced insulation barriers. While not certified to ISO/IEC 17025 or ASTM E2252 per unit, the platform is routinely deployed in laboratories operating under GLP and GMP frameworks—particularly where temperature traceability, audit-ready logging, and instrument qualification (IQ/OQ/PQ) are required. All models support optional calibration certificate documentation aligned with NIST-traceable reference standards.

Software & Data Management

Optional digital interfaces enable full data governance: RS-485 Modbus RTU protocol allows integration into SCADA or LIMS platforms for remote monitoring and centralized parameter logging. A USB port supports direct export of time-stamped temperature logs (.CSV format) to removable storage for post-experiment analysis. Optional thermal printout capability (via IEEE 1284 parallel or USB thermal printer) provides hard-copy records compliant with FDA 21 CFR Part 11 requirements when paired with validated software and electronic signature workflows. The programmable controller supports up to seven multi-step profiles (63 total segments), each configurable for ramp rate, dwell time (1–99 h 59 min), and target temperature—with automatic transition logic and cycle repetition.

Applications

• Calibration of temperature-sensitive sensors (RTDs, thermistors, infrared detectors) against NIST-traceable references.
• Thermal conditioning of samples prior to rheological, mechanical, or spectroscopic analysis (e.g., DSC sample equilibration, UV-Vis cuvette pre-chilling).
• Temperature-controlled enzymatic assays and protein stability studies requiring precise thermal ramps and holds.
• Supporting jacketed reactors and condensers in synthetic chemistry workflows with stable coolant supply.
• Environmental stress screening of electronic components and polymer specimens under controlled thermal cycling.

FAQ

What is the maximum allowable working temperature for the MP-C series when using water as the bath medium?
Water may be used up to +95 °C; above this, risk of cavitation and accelerated scaling increases. For extended operation above 80 °C, deionized water with corrosion inhibitor is recommended.
Can the unit operate continuously at its lowest temperature setting?
Yes—continuous operation at minimum setpoint (e.g., −20 °C for MPG-C) is supported under ambient conditions ≤25 °C and proper ventilation (≥200 mm clearance around rear grille).
Is external circulation flow rate measurable or controllable via the onboard interface?
Flow rate is not directly measured, but pump speed is manually adjustable via front-panel controls; flow output correlates linearly with speed setting under fixed system backpressure.
Does the unit include factory calibration documentation?
Standard shipment includes a basic verification report; NIST-traceable calibration certificates with uncertainty budgets are available as a chargeable option.
Are replacement parts—such as compressors or controllers—available globally?
Yiheng maintains an international spare parts distribution network; critical components (compressor, PID controller, pump assembly) are stocked by authorized distributors in EU, NA, and APAC regions.