Truelab ZHWY-110X30 & ZHWY-110X50 Reciprocal Water Bath Shaker

Overview

The Truelab ZHWY-110X30 and ZHWY-110X50 are precision-engineered reciprocal water bath shakers designed for demanding life science applications requiring simultaneous temperature control and mechanical agitation. These instruments operate on a linear reciprocating motion principle—distinct from orbital or rotary shakers—delivering consistent, low-shear oscillation ideal for sensitive biological samples such as microbial cultures, enzyme assays, hybridization reactions, and cell suspension maintenance. The integrated water bath ensures superior thermal uniformity and stability compared to air-jacketed systems, with active temperature regulation across the full range from ambient to 99.9 °C. Engineered with a monolithic electromechanical chassis and suspended buffer isolation, both models achieve near-vibration-free operation (<0.5 mm peak-to-peak displacement under load), minimizing mechanical stress on delicate samples and ensuring reproducible experimental conditions across extended incubation periods.

Key Features

• High-fidelity temperature control: ±0.1 °C resolution and ±0.2 °C uniformity (measured at 37 °C, 100 rpm), enabled by PID-regulated heating and dual independent overtemperature protection circuits
• Dual safety architecture: Automatic heater cutoff triggered by either low-water-level detection or sample-zone thermal excursion exceeding preset thresholds (e.g., >3 °C deviation from setpoint)
• Anti-dry-burn safeguard: Real-time water level monitoring prevents heater activation when fluid volume falls below operational minimum
• Power-loss recovery: Upon grid interruption and restoration, the unit resumes prior operating parameters—including time remaining, temperature setpoint, and rpm—without manual reconfiguration
• Robust drive mechanism: Heavy-duty linear actuator system maintains stable frequency output (±1 rpm accuracy) even under maximum load conditions, with no speed drift over 500-hour continuous operation
• Intuitive LCD interface: Simultaneous display of set values (temperature, rpm, timer) and real-time measured values; password-protected parameter locking prevents inadvertent changes during multi-user lab environments
• Modular tray design: Stainless steel electropolished platform (434 × 256 mm for ZHWY-110X30; 494 × 316 mm for ZHWY-110X50) with detachable spring clips compatible with standard Erlenmeyer flasks (100–1000 mL), test tubes, and culture vessels
• Service-ready infrastructure: Side-mounted drain valve, optional external chiller port (for sub-ambient operation down to 4 °C), and corrosion-resistant 304 stainless steel bath chamber (508 × 300 × 198 mm / 568 × 360 × 250 mm)

Sample Compatibility & Compliance

The ZHWY series accommodates a broad spectrum of vessel configurations without modification: standard configurations include 11 × 250 mL flasks (ZHWY-110X30) or 15 × 250 mL flasks (ZHWY-110X50), scalable to 6 × 1000 mL via optional tray inserts. All wetted components—including bath liner, tray, springs, and clamps—are fabricated from medical-grade 304 stainless steel, compliant with ISO 13485 material traceability requirements for diagnostic device manufacturing environments. While not certified to IEC 61010-1:2010 Ed.3 as a standalone Class II device, the shakers meet essential safety and EMC criteria for laboratory use under EN 61326-1:2013 and are routinely deployed in GLP-compliant microbiology labs where audit trails for temperature and timing parameters are maintained externally per FDA 21 CFR Part 11 guidelines.

Software & Data Management

These benchtop shakers operate as stand-alone instruments with embedded microcontroller firmware—no PC connectivity or proprietary software required. All operational data (setpoints, elapsed time, real-time temperature/rpm) are retained in non-volatile memory and displayed continuously on the backlit LCD. For laboratories requiring electronic recordkeeping, analog voltage outputs (0–5 V) for temperature and rpm are available via rear-panel BNC ports, enabling integration with third-party data loggers compliant with ASTM E2500-13 validation protocols. Time-stamped alarm events (e.g., overtemp, low water, timer completion) are stored in a circular buffer supporting retrospective review of up to 128 event entries.

Applications

• Bacterial and yeast fermentation kinetics under controlled thermal and agitation profiles
• Western blot membrane hybridization and antibody incubation with reduced background noise
• Enzymatic reaction optimization requiring precise shear rate modulation (via amplitude selection between 16 mm and 24 mm)
• Cell line passaging and suspension culture maintenance in serum-free media
• Pharmaceutical stability testing per ICH Q5C guidelines using aqueous-based formulations
• Environmental microbiology: MPN enumeration, nutrient broth enrichment, and bioremediation assay development
• Food safety testing: Pathogen enrichment (e.g., Salmonella, Listeria) in buffered peptone water per ISO 6579-1:2017

FAQ

What is the difference between the ZHWY-110X30 and ZHWY-110X50 models?

The ZHWY-110X50 features a larger bath chamber (568 × 360 × 250 mm vs. 508 × 300 × 198 mm), wider tray (494 × 316 mm vs. 434 × 256 mm), higher power rating (2300 W vs. 1600 W), and increased flask capacity—enabling up to 15 × 250 mL flasks versus 11 × 250 mL.
Can the oscillation amplitude be adjusted during operation?

Amplitude is mechanically fixed per unit configuration (16 mm standard; 24 mm available upon order). Switching requires physical replacement of the cam assembly and recalibration—not user-adjustable in real time.
Is external refrigeration support included?

No. The chiller interface is a passive port; users must supply a compatible recirculating chiller (e.g., Thermo Scientific™ Polyscience® 4510) capable of delivering coolant at ≤4 °C and ≥2 L/min flow rate.
Does the unit comply with electromagnetic compatibility standards for shared lab environments?

Yes. Certified to EN 61326-1:2013 for industrial/scientific use, including conducted/radiated emissions and electrostatic discharge immunity testing.
What maintenance intervals are recommended for long-term reliability?

Annual inspection of water level sensor calibration, heater resistance verification, and drive belt tension assessment is advised. No scheduled lubrication is required—the linear actuator employs sealed lifetime bearings.