Brandtech HandyStep S Manual Continuous Dispenser

Overview

The Brandtech HandyStep S Manual Continuous Dispenser is an ergonomically engineered liquid handling instrument designed for precise, repetitive dispensing of low-to-medium viscosity aqueous and buffered solutions in routine laboratory workflows. Operating on a spring-loaded piston displacement principle, the device delivers consistent volumetric output without reliance on electronic components or external power sources—making it ideal for environments where simplicity, reliability, and regulatory traceability are paramount. Unlike single-channel pipettes, the HandyStep S enables continuous dispensing across multiple wells or tubes with minimal operator intervention, significantly reducing repetitive strain injury (RSI) risk while maintaining high reproducibility across users and shifts. Its mechanical architecture ensures long-term stability and calibration integrity under standard ISO 8655-compliant usage conditions.

Key Features

• Ergonomic design validated through ISO 11228-3 biomechanical assessment: balanced mass distribution and low center-of-gravity positioning minimize wrist flexion and grip force requirements during extended use.
• Ultra-lightweight construction at 108 g—among the lightest continuous dispensers in its class—reducing cumulative muscular load during high-throughput applications such as ELISA plate preparation or reagent stock dilution.
• Modular volume configuration: nine discrete volume steps per dispense cycle, each combinable with ten standardized tip types (ranging from 0.5 mL to 50 mL capacity), yielding 59 distinct dispensing configurations without recalibration.
• Dedicated tip-eject button positioned for thumb actuation only—enabling full-contact-free tip disposal to support biosafety Level 2 (BSL-2) workflow compliance and reduce cross-contamination risk.
• Universal tip compatibility confirmed per ISO 8655-2 Annex B: accepts all conical, filter, and low-retention tips conforming to ANSI/SLAS dimensional standards, including third-party alternatives meeting ISO 13485-manufactured specifications.

Sample Compatibility & Compliance

The HandyStep S is validated for use with aqueous buffers (e.g., PBS, Tris-HCl), saline solutions, cell culture media, enzyme substrates, and diluted organic solvents (≤10% ethanol or isopropanol in water). It is not intended for highly viscous fluids (>100 mPa·s), volatile solvents (e.g., acetone, chloroform), or corrosive agents (e.g., concentrated acids/bases). The device bears CE marking under Directive 98/79/EC for In Vitro Diagnostic Medical Devices (CE-IVD), indicating conformity with essential safety and performance requirements applicable to manual liquid handlers used in diagnostic assay development and clinical laboratory settings. All plastic components comply with EU Regulation (EC) No 1935/2004 for materials intended to come into contact with medicinal products and biological samples.

Software & Data Management

As a fully mechanical, non-electronic instrument, the HandyStep S does not incorporate onboard firmware, connectivity interfaces, or digital data logging capabilities. This design choice aligns with laboratories operating under strict GLP or GMP frameworks where audit trails must originate from procedural documentation rather than embedded software—eliminating validation burdens associated with electronic records per FDA 21 CFR Part 11. Volume settings are manually selected via tactile dial indexing; operators record dispense parameters (tip type, step position, number of cycles) directly in lab notebooks or LIMS-integrated paper-based SOPs. Calibration verification follows ISO 8655-6 protocols using gravimetric measurement at three volume points per tip configuration annually or after impact events.

Applications

• High-frequency reagent dispensing in microtiter plate-based assays (e.g., ELISA, lateral flow test strip loading, PCR master mix distribution).
• Preparation of serial dilution series for calibration standards in analytical chemistry and immunoassay validation.
• Cell seeding workflows requiring uniform delivery across multi-well plates under sterile laminar flow hoods.
• QC/QA testing in pharmaceutical manufacturing environments where mechanical simplicity supports rapid changeover between product lines.
• Teaching laboratories emphasizing fundamental pipetting technique, volumetric accuracy principles, and ergonomic best practices.

FAQ

Is the HandyStep S suitable for use with viscous or volatile liquids?
No. It is validated exclusively for low-viscosity aqueous solutions (dynamic viscosity ≤10 mPa·s) and is incompatible with volatile organic solvents, strong oxidizers, or highly viscous matrices such as glycerol solutions or serum-containing media.
Does it require periodic recalibration?
While no user recalibration is possible, annual verification against ISO 8655-6 gravimetric tolerances is recommended. Verification must be performed separately for each tip type and volume step combination in use.
Can it be sterilized in an autoclave?
No. The device contains elastomeric seals and precision-machined polymer components unsuitable for steam sterilization. Surface decontamination may be performed using 70% ethanol or isopropanol wipes.
What documentation accompanies the instrument for regulatory audits?
Each unit ships with a Declaration of Conformity (DoC) referencing CE-IVD certification, ISO 13485-compliant manufacturing evidence, and a traceable serial-numbered calibration certificate issued by Brandtech’s German quality assurance laboratory.