Otisience AP-02B Oil-Free Vacuum & Pressure Pump

Overview

The Otisience AP-02B is a dual-head, oil-free diaphragm pump engineered for precise, contamination-free vacuum and positive pressure generation in analytical and life science laboratories. Unlike rotary vane or piston-based systems, it operates on a reciprocating elastomeric diaphragm mechanism—driven by a brushless AC motor—to alternately expand and compress internal chambers. This architecture eliminates lubricants from the gas path, ensuring Class 0 compressed air per ISO 8573-1 and preventing sample or solvent contamination during critical applications such as HPLC mobile phase degassing, solid-phase extraction (SPE), and vacuum filtration. Its closed-loop pressure regulation system employs an integrated piezoresistive pressure sensor and microcontroller-driven duty-cycle modulation—enabling stable setpoint maintenance across variable flow demands without manual valve adjustment. This distinguishes it from conventional bypass-valve regulated pumps, where load-dependent pressure drift necessitates frequent recalibration.

Key Features

• Dual-diaphragm head configuration delivering up to 10,000 mL/min free-air flow while maintaining low thermal load and extended service intervals
• Microprocessor-controlled pressure regulation: real-time feedback via embedded pressure transducer enables automatic duty-cycle adaptation—ensuring ±1.5 kPa stability over 10–100% flow range
• Front-panel dual LED display showing simultaneous vacuum (kPa) and pressure (kPa) values, with intuitive rotary knob for analog setpoint adjustment
• Compact low-profile chassis (85 mm height) optimized for under-bench installation or integration into modular lab workstations
• Dual independent ports: dedicated negative-pressure inlet (for filtration, degassing, aspiration) and positive-pressure outlet (for purging, fluid transfer, or pneumatic actuation)
• Brushless AC motor with thermal overload protection; restarts automatically after cooldown—no manual reset required
• Chemically resistant EPDM diaphragms and PTFE-coated valves ensure compatibility with aqueous, mild organic, and buffered solutions

Sample Compatibility & Compliance

The AP-02B is validated for use with standard laboratory consumables including FB-series filtration manifolds, SPE cartridges (C18, silica, ion-exchange), and glass vacuum desiccators. It meets IEC 61010-1 safety requirements for measurement, control, and laboratory equipment. While not certified for explosive atmospheres (ATEX), its oil-free architecture complies with USP , FDA 21 CFR Part 11 data integrity prerequisites (when paired with compliant logging software), and GLP/GMP environmental monitoring workflows requiring documented, repeatable vacuum profiles. The pump is not intended for continuous high-vacuum applications (<5 kPa absolute) or corrosive gas handling (e.g., HCl, Cl₂, NH₃).

Software & Data Management

The AP-02B operates as a standalone instrument with no proprietary software dependency. Analog pressure setpoints and real-time readings are displayed locally; however, its 0–5 V DC analog output (accessible via rear-panel BNC connector) supports integration into third-party data acquisition systems (e.g., LabVIEW, MATLAB, or PLC-based SCADA). When used in regulated environments, users may configure external DAQ hardware to log timestamped pressure/vacuum traces, enabling audit-ready records aligned with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Firmware updates—delivered via USB—retain full backward compatibility and include enhanced thermal fault diagnostics.

Applications

• HPLC and UHPLC mobile phase degassing and solvent filtration using FB-series vacuum manifolds
• Automated solid-phase extraction (SPE) cartridge conditioning, loading, and elution under controlled vacuum
• Vacuum-assisted cell lysate clarification and protein precipitation workflows
• Controlled nitrogen purging of reaction vessels and inert-atmosphere glove box make-up
• Low-pressure fluid transfer in microfluidic device priming and membrane hydration protocols
• Stable negative pressure supply for vacuum ovens, freeze dryers (preliminary drying stages), and desiccation chambers

FAQ

Does the AP-02B require routine oil changes or lubrication?
No. It is a fully oil-free diaphragm pump; all wetted parts are constructed from chemically inert polymers and elastomers—eliminating maintenance associated with oil degradation, misting, or vapor carryover.
Can it maintain constant pressure when flow demand fluctuates?
Yes. Its closed-loop pressure control system continuously monitors output pressure and adjusts motor duty cycle in real time—unlike passive bleed-valve designs that require manual readjustment after flow changes.
Is the pump suitable for vacuum filtration of aggressive solvents like chloroform or THF?
It is compatible with short-term exposure to common HPLC-grade organics (e.g., methanol, acetonitrile, ethyl acetate) but not recommended for prolonged use with highly swelling solvents (e.g., chloroform, DMSO, DMF) due to potential EPDM diaphragm degradation.
What is the expected service life of the diaphragm assembly under normal lab usage?
Rated for ≥10,000 hours of intermittent operation (typical lab duty cycle: 20–30% on-time); replacement kits (diaphragms, valves, gaskets) are available with full OEM part traceability.
How does ambient temperature affect startup performance?
Below 10°C, elastomer stiffness may delay initial actuation; allow 10–15 minutes of thermal equilibration before operation. The unit includes cold-start compensation logic to prevent stalling during warm-up.