Yarong YRDC-0510 Vertical Low-Temperature Constant-Temperature Bath

Overview

The Yarong YRDC-0510 is a vertically oriented, high-stability low-temperature constant-temperature bath engineered for precise thermal control in laboratory and analytical applications. It operates on a closed-loop refrigeration and heating system, integrating a compressor-based cooling module with PID-controlled electric heating elements to achieve rapid temperature equilibration and sustained thermal accuracy across its full operating range of −5 °C to 100 °C. The device employs forced-circulation thermoregulation via an internal pump, enabling uniform heat exchange between the bath medium and externally connected instruments—such as spectrophotometers, viscometers, calorimeters, or reaction blocks—thereby eliminating localized thermal gradients and supporting reproducible experimental conditions. Its design emphasizes mechanical stability, low-vibration operation, and compatibility with standard lab infrastructure, making it suitable for environments requiring compliance with GLP, ISO/IEC 17025, and ASTM E29–23 (Standard Practice for Using Significant Digits in Test Data) for temperature-dependent measurements.

Key Features

• High-precision temperature control with ±0.05 °C stability and uniformity—validated at multiple points within the bath volume using traceable calibrated probes.
• 0.01 °C digital setpoint resolution, allowing fine-tuned adjustment for sensitive kinetic or phase-transition studies.
• 10-liter stainless-steel liquid reservoir with optimized geometry (215 mm × 170 mm × 150 mm opening) to accommodate immersion of large-diameter sensors, jacketed reactors, or multi-port adapters.
• Integrated circulation pump with adjustable flow rate and non-cavitation impeller design, ensuring consistent medium delivery without introducing measurable mechanical perturbation.
• Dual-mode thermal management: energy-efficient refrigeration below ambient and proportional heating above ambient, both governed by adaptive PID algorithms with auto-tuning capability.
• Front-panel LED display with intuitive menu navigation, real-time monitoring of actual/setpoint temperatures, and status indicators for refrigeration load, heater duty cycle, and pump operation.
• Robust construction featuring insulated double-walled chamber, corrosion-resistant interior finish, and vibration-damped mounting for integration into optical tables or precision instrumentation benches.

Sample Compatibility & Compliance

The YRDC-0510 supports a wide range of external equipment via standardized ¼″ or ⅜″ fluid ports compatible with common silicone, fluoropolymer, or stainless-steel tubing. It is routinely deployed in conjunction with UV-Vis spectrophotometers (e.g., Agilent Cary series), differential scanning calorimeters (DSC), rotary viscometers, and electrochemical cells requiring stable thermal boundary conditions. The bath is compatible with common heat-transfer media including silicone oils (e.g., Dow Corning 200 Fluid, viscosity grade 100 cSt), ethylene glycol/water mixtures (up to 60% v/v), and specialized low-temperature fluids meeting IEC 60454-3 specifications. While not certified to UL/CSA or CE for medical or industrial safety standards, its operational parameters align with laboratory best practices outlined in ISO 17025:2017 Clause 6.4.3 (environmental conditions) and support audit-ready documentation when paired with external calibration records and maintenance logs.

Software & Data Management

The YRDC-0510 operates as a standalone instrument with no embedded data logging or remote interface; however, its analog output (0–5 V or 4–20 mA, configurable) enables seamless integration with third-party DAQ systems (e.g., National Instruments CompactDAQ, Keysight 34972A) for time-synchronized temperature acquisition. When used in regulated environments—such as pharmaceutical QC labs adhering to FDA 21 CFR Part 11—the unit supports manual entry of calibration certificates, operator IDs, and maintenance timestamps in associated electronic lab notebooks (ELNs). Its thermal performance profile is fully characterizable per ASTM E74–22 (Standard Practices for Calibration of Laboratory Thermometers), facilitating periodic verification against NIST-traceable reference standards.

Applications

• Calibration of temperature-sensitive transducers and RTDs under controlled thermal ramping protocols.
• Stabilization of optical path lengths in interferometric setups where thermal drift must remain below λ/10 over extended acquisition windows.
• Thermal preconditioning of polymer samples prior to rheological testing (e.g., ASTM D3835).
• Controlled-cooling assays in enzymology and protein folding studies requiring sub-zero incubation with minimal thermal overshoot.
• Environmental simulation for electronics reliability testing (e.g., JEDEC JESD22-A119) using external cold plates coupled via circulation manifolds.
• Support of ASTM D97 (pour point determination) and D2500 (cloud point measurement) in petroleum product analysis laboratories.

FAQ

What temperature range does the YRDC-0510 support, and how is low-temperature operation achieved?
The unit maintains stable operation from −5 °C to 100 °C using a hermetically sealed refrigeration circuit with R134a or R290 refrigerant, combined with resistive heating elements and dual-stage thermal insulation.
Is the bath compatible with aqueous solutions, or is oil mandatory?
Both aqueous antifreeze mixtures (e.g., 40% propylene glycol/water) and silicone oils are supported; however, water-only operation is not recommended below 5 °C due to freezing risk and pump cavitation concerns.
Can the YRDC-0510 be integrated into automated test sequences?
Yes—via its analog voltage/current output and optional RS485 Modbus RTU interface (available on request), enabling synchronization with PLCs or SCADA platforms for unattended thermal cycling protocols.
What maintenance intervals are recommended for long-term reliability?
Compressor oil and refrigerant levels should be verified annually; circulating fluid must be replaced every 12 months or after 2,000 hours of cumulative operation, per manufacturer service guidelines.
Does the unit include built-in validation tools for IQ/OQ documentation?
No—validation requires external Class A PT100 probes and certified data loggers; however, the bath’s documented thermal performance metrics meet baseline requirements for installation qualification (IQ) and operational qualification (OQ) per ISO 9001 Annex A.2.