Hirschmann 958105020 Touch-Controlled Maintenance-Free Precision Liquid Dispenser
| Brand | Hirschmann |
|---|---|
| Origin | Germany |
| Model | 958105020 |
| Compliance | ISO, GLP, GMP, DIN |
| Chemical Resistance | Strong acids, strong bases, organic solvents |
| Application Scope | Laboratory liquid dispensing, serial dilution, volumetric transfer in biosafety level 2 (BSL-2) and BSL-3 environments |
Overview
The Hirschmann 958105020 is a compact, touch-operated precision liquid dispenser engineered for high-reproducibility volumetric delivery in regulated laboratory environments. Based on positive displacement piston technology, it delivers accurate, pulse-free liquid transfer without reliance on air displacement or gravitational flow—minimizing bubble formation, evaporation artifacts, and cross-contamination risks. Designed and manufactured in Germany, the unit integrates a sealed, wear-resistant ceramic piston system with a chemically inert PTFE/PEEK fluid path, enabling direct compatibility with aggressive reagents including concentrated HCl, NaOH, acetone, acetonitrile, and ethanol. Its maintenance-free architecture eliminates routine calibration drift associated with mechanical wear, ensuring long-term metrological stability across thousands of dispense cycles.
Key Features
- Intuitive 4.3-inch capacitive touchscreen interface with multilingual support (English, German, French, Spanish), enabling rapid parameter entry and real-time status feedback
- Programmable dispensing modes: single-shot, repeat dispensing, serial dilution (with auto-step volume increment/decrement), and continuous flow at user-defined rates
- Dispense volume range: 0.1 mL to 50 mL per cycle (adjustable in 0.01 mL increments), optimized for trace-level standards preparation and bulk reagent distribution
- Integrated anti-drip valve and tip-seal detection prevent droplet formation and ensure consistent meniscus positioning during aspiration and dispensing
- IP54-rated enclosure with reinforced polycarbonate housing for operation in humid, splash-prone, or fume hood environments
- No external power supply required—operates via internal rechargeable Li-ion battery (≥8 hours continuous use per charge)
Sample Compatibility & Compliance
The 958105020 is validated for use with glass, HDPE, and PET reagent bottles (25–1000 mL), as well as standard screw-cap vials and universal lab tubes. Its modular base accommodates both fixed-position bottle adapters and adjustable-height platforms for irregular container geometries. The device conforms to ISO 8655-3 (piston-type dispensers), ISO/IEC 17025:2017 (testing and calibration laboratories), and supports full audit trail generation required under GLP and GMP frameworks. It meets DIN EN 61326-1 for electromagnetic compatibility and DIN EN 61000-6-3 for industrial emission limits. In biosafety contexts, its closed-system design and non-aerosolizing dispensing mechanism align with WHO Laboratory Biosafety Manual (3rd ed.) recommendations for BSL-2 and BSL-3 containment workflows.
Software & Data Management
No proprietary PC software is required for basic operation; all settings are stored locally in non-volatile memory with timestamped execution logs. Optional USB-C data export enables CSV-formatted records of dispense events—including volume, date/time stamp, operator ID (via optional RFID badge reader integration), and error codes—for integration into LIMS or ELN systems. Audit trails comply with FDA 21 CFR Part 11 requirements when paired with validated electronic signature modules. Firmware updates are performed via encrypted USB drive with SHA-256 checksum verification to ensure integrity and traceability.
Applications
- Environmental monitoring: Standardized preparation of calibration standards for ICP-MS, IC, and GC-MS analysis in drinking water, marine sediment porewater, and airborne particulate extracts
- Public health laboratories: Reproducible dilution series for ELISA, PCR master mix assembly, and antimicrobial susceptibility testing (AST) in CDC- and WHO-endorsed protocols
- Food safety testing: Accurate spiking of mycotoxin reference materials into cereal matrices prior to LC-MS/MS quantification
- Regulatory compliance labs: Generation of certified reference material (CRM) aliquots under ISO Guide 34 and ISO/IEC 17034 accreditation scopes
- Contract research organizations (CROs): Documentation-ready liquid handling for method validation studies per ICH Q2(R2) guidelines
FAQ
Does the 958105020 require periodic recalibration?
No. Its factory-calibrated ceramic piston assembly and temperature-compensated encoder eliminate the need for user-performed recalibration under normal operating conditions (15–30 °C, <70% RH). Calibration certificates traceable to PTB (Physikalisch-Technische Bundesanstalt) are supplied with each unit.
Can it dispense viscous liquids such as glycerol or serum?
Yes—within defined viscosity limits (up to 500 mPa·s at 20 °C). For fluids exceeding this threshold, optional low-speed dispensing mode and pre-wet priming protocols are available via firmware update.
Is the device compatible with third-party disposable tips or bottles?
It interfaces natively with Hirschmann-certified polypropylene dispensing tips (Cat. No. 958105015) and standard GL45-threaded bottles. Non-OEM containers may be used if dimensional tolerances conform to DIN 12451 and ISO 8379 specifications.
How is cleaning and decontamination performed between hazardous samples?
The fluid path is fully autoclavable (121 °C, 20 min, 2 bar) and supports solvent flush cycles using IPA or 70% ethanol. A built-in purge function evacuates residual liquid from the piston chamber prior to sterilization.
What documentation is provided for quality assurance purposes?
Each unit ships with a Certificate of Conformance, Factory Calibration Report, EU Declaration of Conformity (CE), and RoHS/REACH compliance statements—all digitally signed and archived in PDF/A-1b format.
