Jianhu JH-15L Precision Constant-Temperature Water Bath

Overview

The Jianhu JH-15L Precision Constant-Temperature Water Bath is an engineered thermal stabilization platform designed to deliver highly stable, uniform, and programmable liquid-phase temperature environments for scientific and industrial testing applications. Based on resistive heating combined with closed-loop PID feedback control and forced convection via an integrated impeller-driven circulation system, the unit maintains thermal equilibrium across the entire working volume—critical for time-dependent immersion tests where spatial and temporal temperature fidelity directly impact result reproducibility. Its operational range of ambient +5°C to 95°C accommodates standard biological incubation, polymer conditioning, material aging, and electrical insulation evaluation protocols. The stainless-steel inner tank ensures chemical resistance and long-term dimensional stability under repeated thermal cycling, while the compact footprint (215 × 170 × 200 mm) enables seamless integration into benchtop analytical workflows in QC labs, R&D centers, and academic teaching facilities.

Key Features

• Precision temperature control with ≤ ±0.05°C uniformity across the full 15 L working volume, verified per ASTM E1137/E1137M calibration guidelines
• Microprocessor-based PID controller with real-time digital display, adjustable ramp rate, and over-temperature safety cutoff
• Stainless-steel interior chamber (304 grade) resistant to corrosion from aqueous buffers, saline solutions, and mild organic solvents
• Internally mounted axial-flow impeller providing consistent laminar circulation without external tubing or pump maintenance
• Thermal insulation optimized to minimize ambient heat loss and reduce energy consumption during extended operation
• Front-panel accessible drain valve and removable lid for easy cleaning, sample loading, and bath fluid replacement

Sample Compatibility & Compliance

The JH-15L is validated for use with a broad spectrum of test specimens including polymeric cables, coated substrates, pharmaceutical dosage forms, food packaging films, and biomedical device components. It supports standardized immersion procedures defined in IEC 60811-501 (electrical insulating materials), ASTM D570 (water absorption of plastics), and USP environmental stability assessments. Temperature stability data logs can be exported for audit trails required under ISO/IEC 17025 Clause 7.8.3 and FDA 21 CFR Part 11–compliant electronic record systems when interfaced with validated third-party data acquisition software. The unit does not incorporate built-in data logging hardware but provides analog voltage output (0–5 V) proportional to setpoint deviation for external SCADA integration.

Software & Data Management

While the JH-15L operates as a standalone analog-controlled instrument, its PID controller features RS-232 communication capability (optional adapter required) for remote parameter setting and basic status monitoring via terminal emulation or custom LabVIEW/VB.NET scripts. No proprietary software suite is bundled; however, the device is compatible with industry-standard calibration management platforms such as MET/CAL and Qualer for traceable temperature verification reporting. All firmware updates—when available—are distributed exclusively through authorized Jianhu technical support channels and require local technician validation prior to deployment in regulated environments.

Applications

• Hot-water immersion testing of insulated wires and cables per IEEE 1210 and UL 1581 Section 1060
• Accelerated aging studies of thermoplastic elastomers and PVC compounds per ASTM D3045
• Stability assessment of temperature-sensitive reagents, vaccines, and lyophilized biologics
• Calibration of liquid-in-glass thermometers and RTD probes using fixed-point reference baths
• Pre-conditioning of viscometry samples prior to Brookfield or rotational rheometer analysis
• Controlled-solubility experiments in formulation development for oral solid dosage forms

FAQ

Does the JH-15L support external temperature probe input for independent verification?

Yes—there is a dedicated BNC port for connecting a calibrated PT100 reference sensor; this signal is used solely for user-side cross-checking and does not feed back into the control loop.
Is the unit suitable for oil bath operation?

No—the internal design, seal materials, and maximum temperature rating are certified only for aqueous media; silicone oil or mineral oil use voids warranty and poses fire risk above 80°C.
Can multiple units be synchronized for parallel testing?

Not natively—each unit operates autonomously. Synchronization requires external PLC-level coordination via discrete I/O signals or Modbus RTU gateway configuration.
What is the recommended maintenance interval for the circulation impeller?

Visual inspection every 500 operating hours; cleaning with deionized water and soft brush is sufficient—no lubrication or disassembly required.
Is CE or UKCA marking applied to this model?

This unit complies with IEC 61010-1:2010 safety requirements but is supplied without CE/UKCA marking, as it is intended for OEM integration or non-regulated research use within China and select export markets requiring self-declaration.