ChemTron Vdose1200 Single-Channel Precision Liquid Dispensing Pump
| Brand | ChemTron |
|---|---|
| Origin | Germany |
| Model | Vdose1200 |
| Dispensing Unit | Single-Channel |
| Flow Rate | 1.25 µL/min to 375 mL/min |
| Accuracy | ≤ 0.5% |
| Resolution | 1/6000 of syringe volume |
| Syringe Volume Range | 50 µL to 25 mL |
| Wetted Materials | Borosilicate Glass, PTFE, Viton |
| Valve Type | 3-Port Automated Switching Valve |
| Communication Interface | RS-232 / RS-485 |
| Power Supply | 110–240 V AC, 50/60 Hz |
| Dimensions (H×W×D) | 305 × 89 × 330 mm |
| Weight | 5.5 kg |
| Order Code | V900703 |
Overview
The ChemTron Vdose1200 is a high-precision, single-channel liquid dispensing pump engineered for reproducible, programmable fluid handling in analytical laboratories, quality control environments, and automated synthesis workflows. Based on positive displacement syringe pump architecture, it operates via motor-driven linear actuation of glass or PTFE syringes, ensuring volumetric accuracy independent of fluid viscosity or backpressure within operational limits. Unlike peristaltic or piston-based systems with elastomeric tubing, the Vdose1200 eliminates pulsation-induced variability and provides traceable, gravimetrically verifiable delivery—critical for applications requiring compliance with ISO/IEC 17025, ASTM E2758, or USP Analytical Instrument Qualification guidelines.
Key Features
- Modular single-channel dispensing unit with rapid, tool-free syringe exchange across 11 standardized volume options (50 µL to 25 mL), enabling method-specific optimization without hardware recalibration.
- Three-port automated switching valve with Viton/PTFE seals supports full-cycle liquid handling: aspiration, hold, dispense, and waste rinse—all executed without manual tubing disconnection or syringe purging.
- TFT graphical display with real-time progress bar, parameter confirmation screen, and error logging enables stand-alone operation with immediate visual feedback on flow rate, volume delivered, and cycle status.
- High-resolution microstepping drive (1/6000 steps per syringe stroke) ensures sub-microliter repeatability at low flow rates while maintaining linear response up to 375 mL/min—suitable for both nanoliter dosing and bulk reagent transfer.
- RS-232 and RS-485 serial interfaces support integration into SCADA systems, PLC-controlled production lines, or PC-based automation platforms using ASCII command protocol; compatible with LabVIEW, Python (pySerial), and MATLAB instrument control toolboxes.
Sample Compatibility & Compliance
The Vdose1200’s wetted path—comprising borosilicate glass barrels, PTFE plungers, and chemically resistant Viton/PTFE valve components—is validated for use with aqueous buffers, organic solvents (e.g., acetonitrile, methanol, DMSO), mild acids and bases (pH 2–12), and non-aggressive halogenated compounds. It is not rated for hydrofluoric acid, strong oxidizers (e.g., concentrated nitric acid), or abrasive suspensions. The system meets CE marking requirements under the EU Machinery Directive 2006/42/EC and EMC Directive 2014/30/EU. Its deterministic flow behavior and audit-trail-capable firmware support alignment with GLP and GMP documentation practices when paired with compliant data acquisition software.
Software & Data Management
The pump operates natively via front-panel controls but is fully programmable through ChemTron’s Windows-compatible Vdose Control Suite. This software enables creation of multi-step protocols—including variable flow ramps, conditional pauses, volume-triggered valve switching, and looped dispensing sequences—with timestamped execution logs exportable as CSV or XML. When deployed in regulated environments, the software supports user access levels, electronic signatures (per FDA 21 CFR Part 11 Annex 11), and configuration change tracking—ensuring full traceability from method definition to raw data output.
Applications
- Automated sample preparation for HPLC, GC, and ICP-MS—including internal standard addition, dilution series generation, and calibration standard dispensing.
- Controlled reagent delivery in parallel synthesis reactors and flow chemistry modules where precise stoichiometric ratios are essential.
- Calibration and verification of pipettes, burettes, and other volumetric glassware via gravimetric dispensing against certified reference weights.
- In-process titration support: interfaced with pH or redox electrodes to trigger dispensing events based on real-time endpoint detection.
- Cell culture media formulation and bioreactor feed control where sterility maintenance and cross-contamination prevention are prioritized via closed-loop, non-contact fluid paths.
FAQ
What syringe sizes are supported by the Vdose1200?
The Vdose1200 accepts 11 standardized syringe volumes ranging from 50 µL to 25 mL. All syringes are manufactured from borosilicate glass with PTFE-tipped plungers and are mechanically interchangeable without recalibration.
Can the pump handle viscous or particulate-containing solutions?
Viscosities up to 500 mPa·s are accommodated at reduced flow rates; however, suspended solids >5 µm diameter may compromise valve sealing integrity and are not recommended.
Is remote monitoring and control possible without proprietary software?
Yes—the RS-232/RS-485 interface implements an open ASCII command set documented in the Technical Reference Manual, allowing custom script-based control using industry-standard terminal emulators or industrial PLCs.
How is accuracy verified and maintained over time?
Accuracy is factory-verified gravimetrically per ISO 8655-3. Users may perform periodic verification using NIST-traceable balances and certified volumetric flasks; no field recalibration is required unless mechanical damage occurs.
Does the Vdose1200 support continuous infusion mode?
Yes—continuous flow is achievable via constant-speed operation with programmable duration or volume termination; flow stability is maintained within ±1.5% over 1-hour runs at mid-range flow rates.
