BRAND HandyStep touch Electric Continuous Dispenser 705200

Overview

The BRAND HandyStep touch Electric Continuous Dispenser 705200 is an ISO 8655-informed, single-channel electronic liquid handling instrument engineered for high-reproducibility continuous dispensing across analytical, clinical, and life science laboratories. Unlike traditional piston-driven repeater pipettes or manual syringe-based dispensers, the 705200 employs a brushless DC motor coupled with a precision-machined glass syringe and integrated pressure-sensing feedback loop to deliver consistent volumetric output over extended dispensing sequences. Its core operational principle relies on controlled plunger displacement within a calibrated glass barrel—enabling true continuous dispensing without intermediate air gaps or reaspiration cycles. This architecture ensures minimal dead volume (< 20 µL), low carryover (< 0.1%), and long-term stability under repeated use at ambient temperature (15–30 °C) and relative humidity ≤ 70% non-condensing.

Key Features

• Capacitive touchscreen interface with intuitive icon-based navigation and context-sensitive help overlays—reducing operator training time and minimizing input errors.
• Five-language menu system (English, German, French, Spanish, Chinese) supporting multilingual laboratory environments without firmware modification.
• Ergonomic handheld form factor with balanced weight distribution (245 g) and textured grip surface—validated for sustained operation over 4-hour shifts per ISO 11228-3 guidelines.
• Modular tip interface compatible with universal Luer-lock and BRAND-specific polypropylene dispensing tips (e.g., 705201, 705210, 705211), enabling rapid tip exchange and autoclavable reuse where applicable.
• Integrated anti-drip valve and optimized fluid path geometry—eliminating post-dispense droplet formation and reducing cross-contamination risk during multi-well plate filling or serial dilution workflows.
• Optional inductive charging cradle (sold separately) provides full battery recharge in ≤ 3 hours and supports hot-swappable operation via dual-battery configuration.

Sample Compatibility & Compliance

The 705200 is validated for aqueous solutions, buffers, organic solvents (e.g., ethanol, acetone, DMSO), and low-viscosity biological matrices (serum, cell culture supernatants, PCR master mixes) up to 10 mPa·s dynamic viscosity. It is not intended for highly viscous, particulate-laden, or corrosive media (e.g., concentrated acids, halogenated solvents). All wetted components—including the glass syringe barrel, PTFE-coated plunger seal, and silicone O-rings—comply with USP Class VI biocompatibility standards. Device calibration traceability follows DIN EN ISO/IEC 17025 requirements when performed using certified reference weights and gravimetric verification protocols. The instrument meets CE marking requirements under Directive 2014/30/EU (EMC) and 2011/65/EU (RoHS), and supports audit-ready documentation for FDA 21 CFR Part 11–aligned environments through optional software integration.

Software & Data Management

While the 705200 operates as a standalone instrument, its embedded firmware supports USB-C data export of dispensing logs (timestamp, volume, cycle count, error flags) in CSV format for downstream LIMS or ELN ingestion. Firmware updates are delivered via signed binary files through BRAND’s official service portal—ensuring cryptographic integrity and version control. No cloud connectivity or remote telemetry is implemented, preserving data sovereignty in regulated settings. When paired with BRAND’s optional PC-based ControlDesk software (v3.2+), users gain access to method templates, user-level permission management, and electronic signature capture compliant with ALCOA+ principles.

Applications

This dispenser serves critical roles in quantitative assay preparation—including ELISA plate coating (50–200 µL/well), qPCR master mix distribution (1–10 µL increments), standard curve dilution series (1:2 to 1:1000), and routine buffer aliquoting for chromatography systems. In clinical diagnostics, it supports IVD workflow reproducibility for immunoassay calibrators and controls. Food safety labs utilize it for precise addition of internal standards in LC-MS/MS residue analysis. Its ability to maintain ±0.6% CV at 10 µL and ±0.3% CV at 1 mL (per ISO 8655-5 gravimetric testing) makes it suitable for tier-2 accuracy requirements where full robotic liquid handlers are cost-prohibitive.

FAQ

Is the HandyStep touch 705200 compliant with ISO 8655?
It adheres to the metrological principles and performance criteria outlined in ISO 8655-5 (dispensers) and ISO 8655-7 (electronic instruments), though formal certification is issued per individual calibration report—not built into the device.
Can it be used with aggressive solvents like chloroform or nitric acid?
No. Only solvents listed in the BRAND Chemical Compatibility Guide (v2023) are supported; chlorinated and strong oxidizing agents degrade seals and compromise accuracy.
What is the battery life under typical usage?
Up to 12 hours of intermittent dispensing (≈ 200 cycles/hour at 100 µL) on a full charge; runtime decreases linearly with volume per cycle and ambient temperature.
Does it support variable dispensing steps within a single program?
No—it executes fixed-volume dispensing only. Variable-step protocols require external scripting via ControlDesk or integration with third-party automation controllers.
How often does it require recalibration?
Annual verification is recommended per ISO/IEC 17025; more frequent checks (quarterly) are advised in high-throughput GMP environments or after mechanical impact events.