Eldex Optos Series 1LM Precision Piston Pump
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | 1LM |
| Pricing | Available Upon Request |
Overview
The Eldex Optos Series 1LM is a high-precision, micro-volume constant-flow piston pump engineered for demanding analytical and preparative applications in chromatography, microfluidics, chemical synthesis, and pharmaceutical process development. Utilizing positive displacement volumetric metering via a precision-machined sapphire-tipped stainless steel (316SS) plunger and chemically resistant polyethylene (PE) piston assembly, the 1LM delivers exceptional flow stability and pressure resilience up to 414 bar (6000 psi). Its operating principle relies on closed-loop stepper motor control with sub-microliter per minute resolution, enabling reproducible delivery of low-to-medium viscosity fluids (up to 500 cP) across temperature ranges from ambient to 120 °C. Designed for integration into automated laboratory workflows, the pump supports both local operation via intuitive front-panel LCD interface and remote command via analog (0–5 V DC or 4–20 mA) or digital RS232 protocols—ensuring compatibility with LIMS, SCADA, and custom control systems.
Key Features
- High-accuracy volumetric displacement using sapphire-plunger tip and 316SS wetted housing for long-term corrosion resistance and mechanical durability
- Integrated pulse-damping architecture (optional 1LMP variant) reduces flow pulsation to <±0.1% RMS, critical for HPLC, UHPLC, and capillary electrophoresis applications
- Full-range flow programmability from 0.002 to 2.5 mL/min with ±0.3% repeatability (measured over ≥10 consecutive cycles under identical conditions)
- Dual-mode pressure monitoring: real-time display of instantaneous outlet pressure with user-configurable upper/lower alarm thresholds
- Onboard piston cleaning system compatible with 20% methanol in deionized water—automatically flushes crystalline residue from sealing surfaces to extend seal life and maintain calibration integrity
- Compact footprint (10 × 23 × 24 cm) and lightweight design (5.3 kg standard; 6.4 kg with integrated damper) suitable for benchtop integration in ISO Class 5–7 cleanrooms or fume hood environments
- Universal AC input (100–230 VAC, 50/60 Hz, 80 W) with internal power regulation for stable performance across global laboratory power infrastructures
Sample Compatibility & Compliance
The 1LM accommodates a broad range of solvents, aqueous buffers, and organic-inorganic mixtures—including acetonitrile, THF, DMSO, and dilute acids/bases—provided they are compatible with 316SS, sapphire, and PE components. It complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets EMC requirements per EN 61326-1:2013. While not certified for use in hazardous locations, its construction supports GLP/GMP-aligned operation when deployed with audit-trail-enabled software and documented calibration procedures. Pressure and flow data logging—when paired with compliant third-party DAQ systems—can satisfy FDA 21 CFR Part 11 requirements for electronic records and signatures.
Software & Data Management
The pump operates natively via front-panel controls but is fully programmable through ASCII-based RS232 commands (baud rate configurable up to 115.2 kbps) or analog setpoint inputs. Eldex provides a Windows-compatible configuration utility for firmware updates, parameter backup, and batch script generation. When integrated into larger automation platforms, the 1LM supports time-stamped event logging—including RUN/STOP transitions, pressure alarms, and flow deviation alerts—for traceability in regulated environments. All communication protocols are deterministic and latency-controlled, ensuring synchronization with external triggers (e.g., detector signals or fraction collector actuation).
Applications
- Isocratic and gradient elution in analytical and preparative liquid chromatography systems
- Precise reagent delivery in continuous-flow synthesis reactors and photochemical microreactors
- Calibration fluid dispensing for viscometers, densitometers, and particle size analyzers
- Controlled infusion in preclinical pharmacokinetic studies requiring stable low-flow dosing
- Mobile phase generation for multi-dimensional LC setups where pulse-free output minimizes baseline noise
- Stand-alone use in method development labs for evaluating column backpressure behavior under defined flow profiles
FAQ
What is the maximum allowable fluid viscosity for the 1LM model?
The 1LM is rated for continuous operation with fluids up to 500 cP at temperatures ≤120 °C. Viscosity limits assume Newtonian behavior and adequate priming to avoid cavitation.
Does the pump support pressure limiting or automatic shutdown on overpressure?
Yes—the 1LM features dual programmable pressure thresholds. Exceeding the upper limit triggers immediate flow halt and visual/audible alert; recovery requires manual reset after root-cause verification.
Can the piston cleaning cycle be scheduled or triggered remotely?
Cleaning is initiated manually via front-panel key sequence or remotely via RS232 command (‘CLEAN’), with duration and solvent volume preconfigured during setup.
Is the 1LM suitable for use with aggressive solvents such as concentrated HF or hot chlorinated hydrocarbons?
No—HF, hot chlorinated solvents, and strong oxidizers (e.g., >30% HNO₃ at elevated T) are incompatible with PE piston material and may degrade sapphire-plunger interfaces. Consult Eldex Chemical Compatibility Guide before deployment.
How often should calibration verification be performed?
Eldex recommends quarterly gravimetric verification using certified volumetric glassware and NIST-traceable balance, especially when operating near maximum pressure or viscosity limits.
