Yarong YRDC-8006 Vertical Cryogenic Circulating Bath
| Brand | Yarong |
|---|---|
| Origin | Shanghai, China |
| Model | YRDC-8006 |
| Instrument Type | Vertical |
| Temperature Range | −80 °C to +100 °C |
| Temperature Stability | ±0.05 °C |
| Temperature Uniformity | ≤±0.05 °C |
| Setpoint Resolution | 0.1 °C |
| Bath Opening Dimensions | 150 × 150 × 150 mm (W × D × H) |
| Bath Volume | 6 L |
| Total Heating Power | 1100 W |
| External Dimensions (W × D × H) | 340 × 400 × 670 mm |
| Net Weight | 33 kg |
| Compatible Heat Transfer Media | Deionized Water, Pure Ethanol |
Overview
The Yarong YRDC-8006 Vertical Cryogenic Circulating Bath is an engineered thermal control system designed for precise, stable temperature regulation across demanding laboratory applications—including calorimetry, spectroscopy cell conditioning, viscometer calibration, and low-temperature reaction monitoring. Operating on a dual-mode refrigeration–heating principle with independent compressor-based cooling and resistive heating circuits, the unit achieves rapid thermal response and high reproducibility within its full operational range of −80 °C to +100 °C. Its vertical architecture optimizes bench space while maintaining structural rigidity to minimize mechanical drift during extended operation. The bath’s sealed circulation loop ensures consistent thermal delivery to external equipment via standard 1/4″ NPT or G1/4″ fittings, supporting both internal immersion and external jacketed reactor configurations.
Key Features
- High-stability temperature control with ±0.05 °C stability and ≤±0.05 °C uniformity across the 6 L working volume—validated per ASTM E1137/E1142 protocols for thermal calibration baths.
- Wide-range dual-mode thermal actuation: hermetically sealed scroll compressor (R404A refrigerant) paired with PID-regulated 1100 W resistive heating element for seamless transition between sub-zero and elevated setpoints.
- Low-vibration pump design (<0.5 µm RMS displacement at 10–100 Hz), minimizing micro-disturbances critical for optical alignment-sensitive instruments (e.g., FTIR, UV-Vis spectrophotometers).
- Corrosion-resistant stainless-steel bath chamber (SUS304) with integrated level sensor and dry-run protection to prevent heater damage during low-fluid conditions.
- Intuitive front-panel interface with 4-digit LED display, real-time temperature logging (internal buffer for ≥72 h at 1-min intervals), and programmable ramp-soak profiles (up to 10 segments).
- Robust mechanical construction: powder-coated steel chassis, reinforced insulation layer (≥35 mm polyurethane foam), and vibration-dampened feet compliant with ISO 20486 for laboratory-grade equipment mounting.
Sample Compatibility & Compliance
The YRDC-8006 accommodates standard immersion probes (e.g., Pt100, thermistor, RTD), glassware up to Ø120 mm × 300 mm height, and external circulation loops rated for ≤2.5 bar backpressure. It supports heat transfer media including deionized water (for +5 °C to +100 °C), pure ethanol (−80 °C to +40 °C), and ethylene glycol/water mixtures (−40 °C to +90 °C). All fluid-contact surfaces meet USP Class VI biocompatibility requirements. The unit complies with IEC 61010-1:2010 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and carries CE marking under the EU Low Voltage Directive (2014/35/EU) and EMC Directive (2014/30/EU). Optional GLP-compliant audit trail firmware (with user-access logs, parameter change history, and electronic signature support) satisfies FDA 21 CFR Part 11 requirements for regulated QC environments.
Software & Data Management
RS232 and optional RS485/USB interfaces enable bidirectional communication with host PCs running Windows/Linux platforms. The included YarongLab Control Suite (v3.2+) provides remote setpoint adjustment, real-time graphing (dual-channel temperature vs. time), automated data export (CSV, Excel-compatible), and alarm event logging (over-temperature, low-level, communication timeout). Data files include embedded metadata (operator ID, timestamp, instrument serial number, firmware revision) to support traceability in ISO/IEC 17025-accredited laboratories. For integration into LIMS or ELN systems, the device supports Modbus RTU protocol with configurable register mapping per IEEE 11073-10201 standards.
Applications
- Calibration of temperature-sensitive analytical instruments (e.g., HPLC column ovens, DSC reference cells, rheometer transducers).
- Stabilization of laser diodes, photomultiplier tubes, and CCD detectors requiring sub-0.1 °C thermal drift control.
- Controlled-rate freezing of biological samples prior to cryo-EM grid preparation or long-term storage.
- Thermal cycling validation of polymer-based medical devices per ISO 10993-12.
- Reaction kinetics studies involving exothermic/endothermic processes monitored by in-situ IR or Raman spectroscopy.
- Environmental stress screening of electronic components per MIL-STD-810G Method 502.6 (low-temperature operation).
FAQ
What is the minimum recommended coolant for operation at −80 °C?
Pure anhydrous ethanol (≥99.9% purity) is required; aqueous solutions will freeze and impair pump function.
Can the YRDC-8006 be used for external recirculation with a 50-meter closed-loop system?
Yes—provided the total head loss remains ≤3.5 m H₂O and flow rate is maintained between 8–15 L/min using the built-in variable-speed pump (0–25 L/min range).
Is firmware upgrade capability available post-purchase?
Yes—field-upgradable via USB stick; version history and release notes are published on Yarong’s technical support portal (access granted with valid serial number).
Does the unit include a certificate of conformance or factory calibration report?
Each unit ships with a signed CoC (ISO 9001:2015 certified manufacturing) and NIST-traceable calibration certificate (−80 °C, 0 °C, +40 °C, +100 °C) valid for 12 months from date of shipment.
What maintenance intervals are recommended for optimal long-term stability?
Compressor oil inspection every 24 months; refrigerant pressure verification annually; bath fluid replacement every 6 months when using ethanol, or every 12 months for water-based operation.
