Elma E-Series Economical Ultrasonic Cleaner

Overview

The Elma E-Series Economical Ultrasonic Cleaner is a rigorously engineered benchtop cleaning system designed for laboratories, quality control facilities, and maintenance workshops requiring reliable, repeatable ultrasonic cleaning performance without premium-tier complexity or cost. Built upon Elma’s six-decade heritage in ultrasonic transducer design and acoustic field optimization, the E-Series employs a fixed-frequency (37 kHz) piezoelectric transduction architecture optimized for general-purpose removal of particulate contaminants, oils, flux residues, and loosely adhered biological films from solid surfaces. Its core principle relies on cavitation—microbubble formation and implosive collapse induced by high-frequency pressure waves in aqueous or mild solvent-based cleaning media—generating localized shear forces sufficient to dislodge contaminants from intricate geometries, blind holes, and micro-textured surfaces. Unlike multi-frequency or digitally programmable platforms, the E-Series prioritizes mechanical robustness, thermal stability, and operational simplicity, making it especially suitable for routine cleaning tasks where reproducibility across shifts and operators is critical.

Key Features

• Uniform Cavitation Field: Incorporates Elma’s proprietary Sweep technology—a controlled frequency modulation around the nominal 37 kHz center—to minimize standing wave nodes and ensure consistent energy distribution across the entire tank volume, reducing cleaning blind spots and enhancing process repeatability.
• Integrated Heating & Precision Timing: Analog temperature control enables stable bath heating from 30 °C to 80 °C with ±2 °C accuracy; mechanical timer offers discrete 1–30 minute intervals or continuous operation mode—both functions independently adjustable and interlocked for safety.
• Ergonomic & Functional Design: Hinged sound-dampening lid reduces ambient noise by up to 15 dB(A); when flipped open, it doubles as a drip tray for post-cleaning part handling. All E30H and larger models include a standard 3/8″ BSP drain port with integrated valve for rapid, spill-free bath emptying.
• Industrial-Grade Construction: Stainless steel tanks (AISI 304) with reinforced corners and welded seams ensure long-term resistance to corrosion and thermal cycling; powder-coated steel chassis provides structural rigidity and chemical splash protection.
• Scalable Capacity Options: Eight standardized configurations (E15H through E300H) span working volumes from 1.75 L to 28.0 L, accommodating everything from microcentrifuge tubes and watch components to large optical mounts and printed circuit board assemblies.

Sample Compatibility & Compliance

The E-Series accommodates a broad range of sample types—including glassware (vials, cuvettes, pipettes), metal tools (tweezers, forceps, surgical instruments), polymer components (PCB substrates, sensor housings), and delicate items such as eyeglass frames and jewelry—provided they are compatible with aqueous or low-alcohol cleaning solutions. While not certified for terminal sterilization per ISO 17664 or EN 285, the unit supports GLP-aligned cleaning validation protocols when used with Elma-certified cleaning agents (e.g., SoluSolv™ series) and documented operating parameters. Its analog controls and absence of digital data logging preclude direct compliance with FDA 21 CFR Part 11 requirements; however, manual logbook entries of time, temperature, and solution batch number satisfy basic audit trails under ISO/IEC 17025 and internal QC SOPs.

Software & Data Management

The E-Series operates exclusively via analog controls—rotary dials for temperature and timer—with no embedded microprocessor, display interface, or connectivity options. This architecture eliminates firmware dependencies, cybersecurity vulnerabilities, and software validation overhead, aligning with laboratories that prioritize deterministic behavior and minimal regulatory documentation burden. Process parameters are manually recorded; for traceability, users are advised to integrate the cleaner into a paper-based or LIMS-linked work instruction system specifying solution composition, exposure duration, and post-cleaning rinse protocol. Elma provides full technical documentation—including dimensional drawings, electrical schematics, and material declarations—in English and German for IQ/OQ support.

Applications

• Cleaning of HPLC vials, GC autosampler inserts, and electrophoresis combs prior to analytical use
• Removal of solder paste residue and rosin flux from PCBs before AOI inspection
• Pre-sterilization cleaning of reusable stainless-steel surgical instruments in hospital SPD departments
• Decontamination of labware used in cell culture or molecular biology workflows (e.g., pipette tips, Petri dishes)
• Ultrasonic degassing of mobile phases and solvents for chromatography systems
• Extraction assistance for botanical matrices (e.g., alkaloid isolation from plant tissue) using ethanol/water mixtures
• Maintenance cleaning of precision optics, watch movements, and dental prosthetics

FAQ

Is the E-Series suitable for cleaning delicate MEMS devices or semiconductor wafers?
The 37 kHz frequency and lack of power modulation limit its suitability for sub-50 µm feature structures; for MEMS or wafer-level cleaning, Elma recommends the S-series with dual-frequency (45/80 kHz) capability and digital power ramping.
Can I use organic solvents such as acetone or chloroform in the tank?
No—only water-based or alcohol-miscible, non-flammable cleaning solutions compliant with Elma’s Material Safety Data Sheets (MSDS) may be used; flammable solvents pose explosion risk and void warranty.
Does the unit include a basket or accessories?
A stainless-steel mesh basket is included with all models; optional accessories include beaker holders, watch-jewel racks, and ultrasonic transducer test coupons (Elma PTC-1).
What is the expected service life of the transducers under normal usage?
With proper maintenance (regular descaling, avoidance of dry operation), Elma specifies a minimum operational lifespan of 10,000 hours for the ceramic transducer stack.
Is CE marking and RoHS compliance documented?
Yes—all E-Series units carry CE marking per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD); RoHS 2011/65/EU compliance is verified and supplied in the Declaration of Conformity included with shipment.