Xiatech CS Series Precision Constant-Temperature Bath

Overview

The Xiatech CS Series Precision Constant-Temperature Bath is an immersion-type circulating thermal bath engineered for high-stability temperature control in analytical, physical property, and materials testing laboratories. Operating on the principle of forced convection via internal recirculation, the system maintains a uniform thermal field within its stainless-steel bath chamber through precise PID-controlled resistive heating and real-time feedback from a calibrated PT100 sensor. Unlike basic water baths, the CS Series integrates digital temperature compensation algorithms that correct for sensor drift and thermal lag—enabling sustained stability of ±0.03 °C across its full operating range (ambient to 100 °C). Its compact footprint (400 × 330 × 150 mm) accommodates standard sample holders, viscometers, density meters, and calorimetric cells while delivering thermal performance comparable to larger industrial-grade units.

Key Features

• Precision temperature regulation using proprietary PID algorithm with adaptive tuning—optimized for both rapid ramp-up and long-term dwell stability.
• High-accuracy PT100 sensor mounted directly in the fluid path, certified to IEC 60751 Class A tolerance (±0.15 °C at 0 °C).
• Dual-level over-temperature protection: programmable alarm threshold with audible alert and hardware-based thermal cutoff relay to isolate heater power independently of controller firmware.
• 0.01 °C-resolution digital temperature offset correction—supports traceable calibration against NIST-traceable reference thermometers per ISO/IEC 17025 requirements.
• Parameter lock function prevents unauthorized modification of setpoints, alarm thresholds, or calibration offsets—essential for audit-ready workflows under GLP or GMP conditions.
• Internal circulation pump ensures homogeneous temperature distribution (ΔT ≤ 0.02 °C across bath volume); optional external circulation interface enables connection to auxiliary equipment such as rheometers or spectroscopic flow cells.

Sample Compatibility & Compliance

The CS Series accommodates aqueous solutions, silicone oils, and low-volatility heat-transfer fluids up to 100 °C. Its open-bath design permits direct immersion of probes, capillary viscometers, density bottles, and sample cuvettes. The unit complies with electromagnetic compatibility standards (EN 61326-1) and electrical safety requirements (EN 61010-1). While not certified for hazardous area use, it meets general-purpose laboratory classification per IEC 61010-2-010. Documentation includes factory calibration report, conformity declaration, and maintenance log template aligned with FDA 21 CFR Part 11 data integrity principles—supporting audit trails for temperature setpoint changes, calibration events, and alarm logs.

Software & Data Management

The embedded control firmware provides local HMI operation via a backlit LCD interface with tactile keypad navigation. All user-modifiable parameters—including target temperature, alarm limits, and calibration offsets—are stored in non-volatile memory with write-protection enabled by default. Audit logging records timestamped entries for critical events (e.g., “SETPOINT CHANGED TO 37.00 °C”, “ALARM TRIGGERED AT 98.5 °C”) without requiring external PC connectivity. For integration into centralized lab informatics systems, optional RS-485 Modbus RTU output enables read-only access to real-time temperature, status flags, and error codes—facilitating automated data capture in LIMS or ELN platforms compliant with ALCOA+ principles.

Applications

This bath serves as a primary thermal environment for viscosity measurements (ASTM D445, ISO 3104), density determinations (ASTM D1298), refractive index calibration (ISO 17025 Annex C), and thermal expansion coefficient studies. It supports QC testing in pharmaceutical excipient characterization (USP ), polymer melt behavior analysis, and calibration of liquid-in-glass thermometers per ISO 17025 Clause 6.5. In academic research, it enables reproducible enzyme kinetics assays, protein denaturation profiling, and solvent property benchmarking under tightly controlled thermal conditions.

FAQ

What fluids are compatible with the CS Series bath?
Deionized water, glycerol-water mixtures, and silicone oils with flash points above 120 °C are recommended. Avoid halogenated solvents or low-boiling-point alcohols due to evaporation and potential damage to seals.
Is external circulation supported out-of-the-box?
The CS Series includes an internal circulation loop only. External circulation requires optional pump coupling hardware and compatible tubing rated for continuous operation at elevated temperatures.
Can the unit be integrated into a networked lab infrastructure?
Yes—via RS-485 Modbus RTU interface (optional accessory), enabling remote monitoring and data logging without modifying core firmware or compromising calibration integrity.
Does the bath meet regulatory requirements for pharmaceutical testing?
It supports compliance with USP , ISO 17025, and FDA 21 CFR Part 11 when used with documented calibration procedures, parameter lock activation, and audit-log retention protocols.
How often should recalibration be performed?
Annual verification against a NIST-traceable reference thermometer is recommended; more frequent checks are advised if used in regulated environments or after mechanical shock or extended high-temperature operation.