Yiheng MP-/MPG-Series Transparent Circulating Water Bath with Heating Only

Overview

The Yiheng MP-/MPG-Series Transparent Circulating Water Bath is an engineered constant-temperature liquid bath system designed for precision thermal control in laboratory environments where visual monitoring of samples and uniform heat distribution are essential. Utilizing a robust heating-only architecture with internal recirculation, the unit maintains stable thermal conditions via a microprocessor-based PID temperature controller. Unlike immersion-style water baths without circulation, this system ensures homogeneous temperature distribution throughout the bath chamber—critical for applications requiring consistent thermal exposure across multiple sample vessels or external devices connected via auxiliary ports. The transparent acrylic or borosilicate glass construction enables real-time observation of sample behavior, fluid dynamics, and immersion status without compromising structural integrity or thermal insulation performance. Its design complies with fundamental safety requirements for Class I electrical equipment under IEC 61010-1, and its operational envelope supports routine use in QC labs, academic research settings, and pre-analytical sample conditioning workflows.

Key Features

• Microprocessor-controlled PID temperature regulation with digital LCD interface for precise setpoint accuracy and repeatability
• Imported high-reliability heating elements and low-noise magnetic drive circulation pump ensuring long-term operational stability
• Dual-stage thermal protection: over-temperature and low-temperature audio-visual alarms coupled with liquid-level sensing to prevent dry-run damage
• Integrated pressure-suction pump enabling auxiliary temperature transfer to external apparatuses (e.g., viscometers, spectrophotometer cells, or reaction jackets)
• Dedicated inlet/outlet ports compliant with standard 10–16 mm tubing connections for seamless integration into larger thermal management systems
• Optional multi-segment programmable controller supporting up to 7 programs × 9 steps each (63 total steps), with time resolution of 1 minute and programmable start/stop scheduling
• Adjustable circulation pump speed to optimize flow rate for viscosity-sensitive or sedimentation-prone samples
• Menu-driven user interface with intuitive navigation and password-protected parameter modification for GLP-compliant operation

Sample Compatibility & Compliance

The MP-/MPG-Series accommodates a wide range of sample formats—including glass beakers, stainless-steel reaction vessels, plastic centrifuge tubes, and custom jigs—within its open-top, transparent bath chamber. Its non-corrosive interior surface and chemically resistant gasketing allow compatibility with aqueous buffers, ethanol/water mixtures, and low-concentration glycol solutions (up to 30% v/v). While not rated for oil-based media, it meets ISO 17025-relevant environmental conditioning criteria when used within specified temperature limits. All units undergo factory calibration traceable to NIM (National Institute of Metrology, China) standards. Documentation includes Declaration of Conformity per CE marking directives (2014/30/EU EMC and 2014/35/EU LVD), and design principles align with Good Laboratory Practice (GLP) requirements for audit-ready temperature logging and alarm event recording.

Software & Data Management

The standard configuration operates without proprietary software; however, optional RS232 or USB-to-serial interfaces enable connection to third-party data acquisition platforms (e.g., LabVIEW, MATLAB, or custom Python scripts) for time-stamped temperature logging. When equipped with the programmable controller variant, the system records alarm events, power-on cycles, and program execution history with timestamped entries—supporting basic 21 CFR Part 11 readiness when deployed with validated electronic record systems. No cloud connectivity or remote access functionality is embedded; all control and data handling remain local to ensure data sovereignty and network security compliance in regulated environments.

Applications

• Thermal equilibration of reagents, standards, and calibration materials prior to analytical measurement (e.g., HPLC mobile phase pre-warming, enzyme assay buffer conditioning)
• Temperature-dependent solubility studies and crystallization kinetics monitoring under visible observation
• Stabilization of optical components during spectroscopic measurements requiring thermal drift mitigation
• Pre-heating and maintenance of viscosity reference oils in rotational rheometry workflows
• Support bath for externally mounted equipment such as refractometers, density meters, or flow-through UV-Vis cells
• Environmental simulation in material science labs for polymer annealing or hydrogel swelling experiments

FAQ

Is this unit suitable for oil-based thermal media?
No. The MP-/MPG-Series is specifically engineered for aqueous and water-miscible fluids only. Use of mineral oil, silicone oil, or other non-polar media may compromise seal integrity and thermal sensor accuracy.
Can external temperature probes be connected for independent verification?
Yes—via optional analog voltage output (0–5 V) or digital RS232 port, allowing integration with calibrated external thermistors or PT100 sensors for cross-validation.
What is the maximum allowable ambient operating temperature?
The unit is rated for continuous operation in ambient environments up to 35 °C with relative humidity ≤80% non-condensing, per IEC 60068-2-1 and IEC 60068-2-2 test conditions.
Does the system support cooling functionality?
No. This is a heating-only circulating bath. For combined heating/cooling capability, consider Yiheng’s TC-series refrigerated circulators.
Are calibration certificates provided with shipment?
A factory calibration report (traceable to NIM) is included. UKAS or ISO/IEC 17025-accredited calibration is available upon request at additional cost and lead time.