CZGY HH-S24 24-Position Digital Water Bath Circulator

Overview

The CZGY HH-S24 24-Position Digital Water Bath Circulator is an engineered thermal platform designed for precise, uniform, and reproducible temperature control in routine laboratory workflows. Operating on the principle of convective heat transfer via a thermally stable water medium, it maintains consistent thermal environments across all 24 sample wells—ideal for applications requiring parallel processing under identical thermal conditions. Unlike open-bath or non-circulating units, the HH-S24 integrates an internal recirculation pump that ensures homogenous temperature distribution throughout the bath chamber (100 × 60 × 12 cm), minimizing axial and radial gradients. Its heating-only architecture—without refrigeration—is optimized for protocols within ambient to 100 °C, including enzymatic reactions, cell culture incubation steps, reagent pre-warming, DNA denaturation, and solvent-based extractions. Constructed with a fully welded 304 stainless steel inner tank and a corrosion-resistant powder-coated cold-rolled steel housing, the unit meets long-term durability requirements in academic, pharmaceutical QC, and industrial R&D settings.

Key Features

• 24 independently accessible wells arranged in a standardized grid layout—compatible with common tube formats (13 mm, 15 mL, 16 mm, 18 mm, and 20 mm OD) and standard glassware (e.g., test tubes, centrifuge tubes, small beakers)
• Fuzzy PID temperature controller with segment LCD display enables intuitive setpoint entry, real-time monitoring, and rapid thermal recovery after sample loading
• ±1 °C temperature stability across full operating range (ambient to 100 °C), verified per ASTM E2207-21 for liquid bath uniformity testing
• 4500 W high-capacity heating system with overheat protection and automatic cut-off—ensures rapid warm-up while maintaining safety compliance with IEC 61010-1
• Integrated 120 W internal circulation pump enhances thermal homogeneity; flow path is fully sealed and service-accessible without disassembly
• Programmable timer (0–9999 minutes) supports unattended operation for extended protocols such as hydrolysis, dialysis, or controlled evaporation
• Robust mechanical design includes adjustable leveling feet, spill-resistant edge geometry, and reinforced well collars to prevent tube tipping during agitation or handling

Sample Compatibility & Compliance

The HH-S24 accommodates a broad range of sample containers—including polypropylene, borosilicate glass, and stainless steel vessels—without risk of chemical leaching or thermal distortion. Its stainless steel bath interior resists corrosion from saline buffers, ethanol/water mixtures, and mild acidic or basic solutions commonly used in molecular biology and analytical chemistry. The unit complies with ISO/IEC 17025:2017 requirements for equipment qualification when deployed in GLP- or GMP-aligned laboratories. While not intrinsically compliant with FDA 21 CFR Part 11, its digital controller supports audit-ready documentation when integrated with validated LIMS or ELN systems. All electrical components conform to CE marking directives (EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU).

Software & Data Management

The HH-S24 operates as a standalone analog-digital hybrid instrument with no embedded firmware update capability or remote connectivity. Temperature setpoints, timer values, and real-time bath temperature are displayed locally via the segment LCD interface. For traceability, users may manually log operational parameters in lab notebooks or electronic records. When deployed in regulated environments, the device supports IQ/OQ protocols through documented calibration against NIST-traceable RTDs or thermistors at three points (25 °C, 50 °C, and 75 °C). Calibration certificates and maintenance logs are retained per organizational SOPs for audit readiness.

Applications

• Parallel sample incubation for enzyme kinetics assays (e.g., ALP, LDH, amylase activity measurements)
• Controlled thawing of cryopreserved biological samples (serum, plasma, cell suspensions)
• Pre-heating reagents prior to HPLC mobile phase preparation or titration standardization
• DNA/RNA hybridization and restriction digestion workflows requiring precise 37 °C or 65 °C holds
• Moisture content determination via gravimetric drying (ASTM D2231-22) when paired with desiccators
• Standardization of viscosity reference oils in QC labs performing kinematic viscosity checks (ASTM D445)
• Extraction efficiency optimization in phytochemical analysis using hot-water maceration

FAQ

What is the maximum recommended fill level for the bath chamber?

Fill the chamber with deionized or distilled water to a level 3–5 cm above the perforated baffle plate—never exceeding the marked “MAX” line. Overfilling risks overflow during boiling; underfilling may expose the heating element and trigger thermal cutoff.
Can the HH-S24 be used with oil or other heat-transfer fluids?

Yes—the unit is rated for both water and silicone oil media up to 100 °C. When using oil, ensure compatibility with stainless steel and confirm flash point exceeds operating temperature by ≥30 °C.
Is external temperature probe input supported?

No. The HH-S24 relies solely on its built-in PT100 sensor located near the center-bottom of the bath. External probe integration requires third-party data loggers.
How often should the water bath be cleaned and descaled?

Weekly cleaning with 1% citric acid solution is recommended for hard-water environments. After each use, drain, wipe dry, and inspect for mineral buildup or biofilm formation.
Does the unit include a calibration certificate?

Factory calibration is performed pre-shipment, but a formal NIST-traceable certificate is available upon request at time of order (additional lead time and fee apply).