Langbo CS-36 Ultrasonic Bath with Integrated Thermostatic Control

Overview

The Langbo CS-36 Ultrasonic Bath with Integrated Thermostatic Control is a dual-function laboratory instrument engineered for precision cleaning, degassing, and temperature-sensitive sample preparation. Unlike standalone ultrasonic cleaners or water baths, the CS-36 integrates high-efficiency 40 kHz piezoelectric transduction with a digitally regulated heating system—enabling simultaneous ultrasonic cavitation and stable thermal control within a single 36 L stainless steel tank. Its operating principle relies on acoustic cavitation: high-frequency pressure waves generate transient microbubbles in the cleaning medium (typically aqueous or mild solvent-based solutions), whose implosive collapse delivers localized energy sufficient to dislodge particulate contaminants, organic residues, and biofilms from delicate instrumentation, glassware, semiconductor wafers, and medical devices. The thermostatic function supports applications requiring controlled thermal activation—such as enzymatic digestion, solvent-assisted extraction, or polymer dissolution—where maintaining uniform temperature distribution (±1 °C) across the entire bath volume is critical to reproducibility.

Key Features

• 36 L capacity stainless steel tank with reinforced corners and corrosion-resistant finish, suitable for batch processing of multiple flasks, beakers, or custom fixtures
• Adjustable ultrasonic power output (0–600 W) via digital interface, enabling optimization for fragile substrates (e.g., microfluidic chips) or heavily soiled components
• Precise temperature regulation from ambient to 90 °C using a 1800 W immersion heater and PID-controlled feedback loop; uniformity maintained within ±1 °C across full load
• Programmable timer (1–999 minutes) with auto-shutdown and audible alert, supporting unattended operation under GLP-compliant protocols
• Integrated sound-dampening lid with safety interlock—reduces airborne noise to ≤65 dB(A) at 1 m distance and prevents solvent evaporation during heated operation
• Front-mounted drain valve with quick-connect fitting and integrated filtration screen, facilitating rapid medium exchange without tank removal
• Stainless steel mesh basket and adjustable support rack included for secure positioning of irregularly shaped items

Sample Compatibility & Compliance

The CS-36 accommodates a broad range of sample types—including borosilicate glassware, stainless steel tools, aluminum fixtures, ceramic substrates, and certain polymer components—provided they are compatible with aqueous or low-surface-tension solvents at temperatures up to 90 °C. It complies with IEC 61000-6-3 (EMC emission standards) and meets mechanical safety requirements per ISO 13857 for guarded access zones. While not certified for sterile processing per ISO 13485, its design supports validation of cleaning efficacy per ASTM F3255-21 (standard guide for ultrasonic cleaning verification) and aligns with preparatory steps outlined in USP “Cleaning and Cleaning Validation”. Routine maintenance—such as transducer inspection, heater calibration, and temperature uniformity mapping—is documented in the user manual to facilitate internal audit readiness.

Software & Data Management

The CS-36 operates via an embedded microcontroller with a backlit LCD interface; no external PC connection or proprietary software is required. All operational parameters (temperature setpoint, ultrasonic intensity, timer duration) are stored in non-volatile memory and retain settings after power cycling. The system logs last-run parameters and cumulative operating hours—accessible via service menu—for preventive maintenance scheduling. While it does not provide real-time data export or electronic records, its deterministic behavior and parameter lockout mode (enabled via password-protected setup menu) support basic 21 CFR Part 11 compliance when used in conjunction with lab-wide procedural controls and manual logbook entries.

Applications

• Routine cleaning of HPLC vials, pipette tips, and electrophoresis combs prior to analytical use
• Removal of photoresist residues and metal oxides from silicon wafers in semiconductor R&D labs
• Extraction of plant metabolites or soil-bound contaminants using heated solvent mixtures
• Preparation of nanoparticle dispersions and colloidal suspensions requiring deagglomeration and thermal stabilization
• Rehydration and gentle disaggregation of lyophilized enzyme preparations or cell culture scaffolds
• Supporting ASTM D2621 (cleaning verification for automotive parts) and ISO 14971 risk management workflows in preclinical device testing

FAQ

Can the CS-36 operate continuously for extended periods?

Yes—the unit is rated for continuous duty up to 8 hours per cycle, provided ambient temperature remains below 30 °C and ventilation clearance (≥10 cm on all sides) is maintained.
Is the temperature calibration traceable to national standards?

The factory calibration uses NIST-traceable reference thermometers; users may perform field verification using a calibrated PT100 probe inserted into the designated sensor port.
What cleaning solutions are recommended for use with the CS-36?

Aqueous alkaline detergents (pH 9–11), ethanol/water mixtures (≤70%), or low-foaming enzymatic formulations are compatible; avoid halogenated solvents and strong acids unless confirmed by material compatibility testing.
Does the unit include over-temperature or dry-run protection?

Yes—a redundant thermal cutoff switch disables heating if tank temperature exceeds 95 °C or if liquid level falls below the minimum fill line detected by float sensor.
Can custom tank geometries or alternative materials be ordered?

Langbo offers OEM modifications including titanium-lined tanks, rectangular configurations, and DIN rail mounting kits—subject to minimum order quantity and engineering review.