Elma 59987-35 Ultrasonic Sieve Mesh Cleaner

Overview

The Elma 59987-35 Ultrasonic Sieve Mesh Cleaner is a purpose-built, benchtop ultrasonic cleaning system engineered for the precise and repeatable removal of fine particulate residues from standard 8-inch (203 mm) diameter sieve meshes—particularly those used in ASTM E11, ISO 3310-1, and USP compliant particle size analysis workflows. Operating at a fixed ultrasonic frequency of 50 kHz, the unit leverages cavitation physics in a controlled liquid medium to dislodge entrapped particles from mesh apertures without mechanical abrasion or structural deformation. Its stainless steel tank (13 cm H × 23.8 cm D) provides chemical resistance and long-term dimensional stability, while the integrated sound-dampening lid reduces ambient noise and prevents solvent evaporation during timed cycles. Designed for integration into regulated laboratory environments—including QC labs performing sieve analysis per FDA, EP, or JP pharmacopeial methods—the 59987-35 supports temperature-controlled operation (adjustable range: ambient to 80 °C) and programmable cycle durations (5–15 min), ensuring method reproducibility across operators and shifts.

Key Features

• Stainless steel tank (5.7 L capacity) with corrosion-resistant 316-grade construction for compatibility with aqueous and mild alkaline cleaning solutions
• Precise digital timer (5–15 min increments) with auto-shutoff and audible end-of-cycle signal
• Adjustable heating function (ambient to 80 °C) with PID temperature regulation for optimized cleaning efficacy on hydrophobic or cohesive residues
• Variable ultrasonic power output—enabling optimization for delicate mesh substrates or heavily loaded samples
• Integrated sound-dampening lid with safety interlock to suppress airborne noise and prevent accidental exposure to ultrasonic energy
• Manual fill-and-drain configuration with overflow protection and non-slip base for stable placement on lab benches
• Compliant with IEC 61000-6-3 (EMC) and IEC 61000-6-2 (immunity) standards for laboratory instrumentation

Sample Compatibility & Compliance

The 59987-35 is validated for use with standard Tyler, ASTM, and ISO-compliant sieve meshes up to 203 mm (8″) in diameter and ≤51 mm in height. It accommodates up to four stacked 8″ × 2″ sieve pans simultaneously when used with optional rotating support fixtures (e.g., Elma M-9052). The unit is not intended for use with strong acids (e.g., HCl, HNO₃), chlorinated solvents (e.g., chloroform, carbon tetrachloride), flammable liquids (e.g., acetone, ethanol above flashpoint), or highly corrosive organics. For optimal residue removal and minimal mesh degradation, Elma recommends Micro-90® detergent (diluted 1:100 in deionized water), a non-ionic, low-foaming, and phosphate-free formulation registered under EPA Safer Choice and compliant with ISO 14001 environmental management systems. Cleaning protocols developed using this system may be documented for GLP/GMP audit trails per 21 CFR Part 11 when paired with validated electronic loggers.

Software & Data Management

As a standalone analog-digital hybrid instrument, the 59987-35 does not feature embedded software or network connectivity. All operational parameters—including time, temperature, and power level—are set via front-panel rotary dials and push-button controls with LED indicators. However, its parameter stability and repeatability enable full traceability when integrated into paper-based or LIMS-linked SOPs. Users may record cycle logs manually or via external data loggers (e.g., calibrated thermocouple + timer) for compliance with ISO/IEC 17025 accreditation requirements. Firmware updates are not applicable; calibration verification is performed annually using NIST-traceable temperature probes and stopwatch validation per manufacturer’s Technical Bulletin TB-59987-REV3.

Applications

• Routine cleaning of metal and polymer sieve meshes used in pharmaceutical granule sizing (USP , )
• Residue removal from analytical sieves prior to gravimetric or laser diffraction particle distribution verification
• Preparation of test sieves for ISO 13320-compliant dry/wet sieving validation studies
• Cleaning of wire cloth filters in geotechnical, cement, and metallurgical QA/QC laboratories
• Supporting ASTM C136/C780 sieve analysis in construction materials testing
• Maintenance of sieve stacks used in food powder flowability and segregation studies (ISO 4401)

FAQ

What sieve sizes are compatible with the 59987-35?

The unit is optimized for 203 mm (8 inch) diameter sieves with maximum stack height of 51 mm (2 inch); optional rotating fixtures support simultaneous cleaning of up to four sieves.
Can I use organic solvents in this cleaner?

No—only aqueous-based, non-flammable, non-chlorinated detergents such as Micro-90® are approved; use of acetone, ethanol, or xylene violates safety certification and voids warranty.
Is temperature calibration required?

Yes—annual verification against a NIST-traceable reference thermometer is recommended per ISO/IEC 17025 Clause 6.5.2 and Elma Service Bulletin SB-59987-TM.
Does the unit meet FDA or EU regulatory requirements for pharmaceutical labs?

While the device itself carries CE marking and complies with IEC 61010-1 for laboratory electrical safety, formal qualification (IQ/OQ/PQ) must be performed by the end user per their internal validation protocol and 21 CFR Part 211 or EU GMP Annex 15 guidelines.
What maintenance is required?

Monthly inspection of tank integrity, lid seal condition, and drain valve functionality; annual ultrasonic transducer impedance check and heater element continuity test by authorized Elma service partner.