Ultrasonic Constant-Temperature Water Bath CS-24

Overview

The CS-24 Ultrasonic Constant-Temperature Water Bath is an integrated laboratory instrument engineered for simultaneous precise temperature control and high-efficiency ultrasonic cavitation. Unlike standalone ultrasonic cleaners or basic water baths, this system combines a thermostatically regulated stainless steel tank with a built-in transducer array operating at a nominal frequency of 40 kHz—optimized for uniform energy distribution across the entire 24 L working volume. The device employs a PID-controlled heating circuit coupled with a platinum resistance temperature sensor (PT100) for real-time feedback, ensuring thermal stability within ±0.5 °C over the full operating range (ambient to 100 °C). Optional refrigeration modules enable sub-ambient operation down to 5 °C, supporting applications requiring thermal inhibition of enzymatic activity or volatile sample handling. Its design conforms to IEC 61010-1 safety standards for laboratory electrical equipment and integrates mechanical and electronic safeguards—including dry-run protection, overtemperature cutoff, and automatic shutdown upon lid removal.

Key Features

• Integrated dual-function architecture: simultaneous ultrasonic cleaning/disinfection and precision temperature regulation in a single compact footprint
• 24 L capacity stainless steel tank (304 grade), electropolished interior for corrosion resistance and ease of decontamination
• 600 W adjustable ultrasonic power output with sweep-frequency mode to minimize standing wave formation and ensure homogeneous cavitation intensity
• PID temperature controller with digital setpoint interface, real-time display, and programmable ramp/soak profiles
• Integrated drain valve with quick-connect fitting for safe, spill-free fluid disposal—compatible with lab waste collection systems
• Acoustically damped hinged lid with transparent viewing window and interlocked safety switch (deactivates ultrasonics when open)
• Stainless steel mesh basket (included) with ergonomic handle; compatible with standard labware including beakers, flasks, and sample vials up to 500 mL
• Extended timer function (0–99 h 59 min) with auto-shutdown and audible alert—supports unattended overnight processing under GLP-compliant conditions

Sample Compatibility & Compliance

The CS-24 accommodates a broad spectrum of sample types and container geometries, including glassware (e.g., volumetric flasks, chromatography vials), metal components (surgical instruments, calibration standards), and polymer-based substrates (microfluidic chips, 3D-printed fixtures). Its temperature and ultrasonic parameters are validated for routine use in ISO 15883-1 (washer-disinfectors), ASTM D2247 (corrosion testing in humid atmospheres), and USP (sterile processing validation). While not certified as a medical device under FDA 21 CFR Part 820, the unit meets essential requirements for ancillary equipment used in GMP environments—particularly in pre-sterilization cleaning of contact surfaces prior to autoclaving or ethylene oxide treatment. All wetted parts comply with FDA CFR Title 21 §177.2420 for indirect food contact, supporting applications in pharmaceutical excipient preparation and cosmetic raw material dispersion.

Software & Data Management

The CS-24 operates via embedded firmware without proprietary PC software dependency. However, it supports RS-232 serial communication (optional USB-to-serial adapter) for integration into centralized lab management systems. Logged parameters—including actual temperature, setpoint, elapsed time, and ultrasonic duty cycle—are timestamped and exportable in CSV format for audit trail generation. When deployed in regulated environments (e.g., QC labs under ISO/IEC 17025), the device can be configured to generate electronic records compliant with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate) and supports 21 CFR Part 11–compliant third-party data acquisition platforms via Modbus RTU protocol. Calibration certificates traceable to NIM (National Institute of Metrology, China) are provided with each unit.

Applications

• Pre-analytical sample preparation: degassing solvents, dispersing nanoparticles, and dissolving heat-sensitive reagents without thermal degradation
• Instrument maintenance: cleaning HPLC injection valves, GC liner assemblies, and ICP-MS nebulizers to prevent carryover and spectral interference
• Materials science: removing organic residues from SEM/TEM specimen stubs and etching masks from photolithographic wafers
• Biochemistry: gentle cell lysis optimization (e.g., bacterial periplasmic extraction), DNA shearing for library prep, and antibody conjugation support
• Quality control: verifying cleanliness of machined components per VDA 19 / ISO 16232 standards using gravimetric or particle-counting validation methods

FAQ

Can the CS-24 operate continuously for extended periods (e.g., >24 h)?
Yes—the system features thermal overload protection and fan-cooled power electronics rated for continuous duty. Recommended maximum uninterrupted runtime is 72 h; periodic inspection of water level and transducer coupling is advised.
Is refrigeration included by default?
No—refrigeration is an optional add-on module. Standard configuration provides heating only (ambient to 100 °C). Refrigerated models require separate quotation and lead time.
What is the expected service life of the ultrasonic transducers?
Under normal use (≤8 h/day, deionized water with periodic descaling), transducers maintain ≥90% nominal power output for ≥5 years. Replacement kits include recalibration documentation.
Does the unit support external temperature probe input for vessel-specific monitoring?
Not natively—but the RS-232 interface allows connection to external PT100 probes via compatible data loggers, enabling secondary temperature verification per ISO/IEC 17025 clause 7.8.3.
Are replacement baskets and lids available as spare parts?
Yes—stainless steel mesh baskets (part #CS-BASKET-24), silicone-sealed lids (part #CS-LID-SD), and drain valve assemblies (part #CS-DRAIN-KIT) are stocked and ship within 3 business days.