CZGY WHY-2 Water Bath Constant-Temperature Shaker

Overview

The CZGY WHY-2 Water Bath Constant-Temperature Shaker integrates precise thermal regulation with controlled reciprocating motion in a single compact platform. Engineered for reproducible incubation and agitation of biological and biochemical samples, it operates on the principle of water-mediated heat transfer combined with mechanically driven linear oscillation. Unlike orbital shakers that induce circular motion, the WHY-2 employs a horizontal reciprocating (back-and-forth) drive mechanism—ideal for applications requiring gentle yet uniform mixing without excessive foaming or splashing. Its stainless steel water bath chamber ensures rapid thermal equilibration and long-term corrosion resistance, while the digitally controlled PID heating system maintains setpoint accuracy within ±0.5 °C across the full operating range (ambient to 100 °C). Designed for routine use in academic laboratories, clinical research units, and QC environments, the instrument supports GLP-aligned workflows through stable temperature homogeneity and consistent mechanical output.

Key Features

• Digital LED display for simultaneous real-time monitoring of temperature and oscillation speed (0–300 rpm)
• Stepless speed control via precision potentiometer—enabling fine-tuned adjustment for sensitive cell cultures or viscous media
• Programmable timer with 1-minute resolution (0–120 minutes), supporting both timed operation and continuous mode
• Single-tier stainless steel tray (40 × 31 cm) with universal spring-clamp mounting system—compatible with flasks (50–2000 mL), test tubes, and multi-well plates
• Low-splash oscillation profile: 20 mm amplitude optimized to generate minimal surface turbulence while ensuring effective suspension and gas exchange
• Robust 1500 W heating element with overheat protection and dry-run safeguard—prevents heater damage during accidental water depletion
• Grounded metal chassis and insulated control panel comply with IEC 61010-1 safety standards for laboratory equipment

Sample Compatibility & Compliance

The WHY-2 accommodates aqueous and buffered solutions, microbial cultures, enzyme reaction mixtures, and tissue homogenates in standard glass or plastic vessels. Its water bath design ensures uniform thermal coupling—critical for temperature-sensitive assays such as bacterial growth kinetics, protein solubilization, and immunoassay incubation. The unit meets structural and electrical safety requirements per IEC 61010-1 Ed. 3.0 and is suitable for environments adhering to ISO/IEC 17025 documentation practices. While not certified for GMP manufacturing zones, its stability, repeatability, and traceable parameter logging (via optional external data logger) support audit-readiness in regulated academic and diagnostic labs.

Software & Data Management

The WHY-2 operates as a standalone analog-digital hybrid instrument with no embedded firmware or network interface. All operational parameters are manually set and displayed locally; no software installation or driver dependency is required. For laboratories requiring electronic recordkeeping, the device can be integrated into validated data acquisition systems via external PT100 probe inputs and 4–20 mA analog outputs (available on custom-configured units). When used in conjunction with LIMS-compatible environmental monitors, it satisfies basic FDA 21 CFR Part 11 expectations for manual entry traceability—provided operators maintain contemporaneous logbooks recording setpoints, duration, vessel types, and sample identifiers.

Applications

• Bacterial and yeast culture expansion under controlled thermal and agitation conditions
• Enzyme activity assays requiring precise temperature maintenance during kinetic measurement
• Solubility and dissolution testing of pharmaceutical excipients in aqueous media
• Antibiotic susceptibility testing using broth microdilution methods
• Cell lysis optimization via mechanical agitation in detergent-based buffers
• Preparation of homogeneous suspensions for spectrophotometric or HPLC analysis
• Environmental microbiology—e.g., BOD incubation, coliform enrichment in liquid media

FAQ

Is the WHY-2 suitable for use with organic solvents?
No. The water bath chamber is designed exclusively for aqueous media. Organic solvents may degrade seals, corrode stainless steel surfaces, and pose fire hazards when heated.
Can multiple flask sizes be run simultaneously on the single tray?
Yes—the universal spring clamp system allows secure mounting of vessels ranging from 15 mL centrifuge tubes to 2 L Erlenmeyer flasks without adapter kits.
What maintenance is required to ensure long-term calibration stability?
Annual verification of temperature uniformity using NIST-traceable thermometers at 5-point grid locations (center + four corners) is recommended. Clean the water bath weekly with deionized water and descale quarterly if using tap water.
Does the instrument include alarm functionality for temperature deviation?
No. It features overtemperature cutoff only. External digital controllers or SCADA interfaces must be added for active alarm notification.
Is the 20 mm amplitude adjustable?
No. The amplitude is fixed at 20 mm to ensure mechanical consistency and minimize harmonic resonance across the 0–300 rpm range.