Ismatec ISM901B Compact Programmable Digital Gear Pump Drive

Overview

The Ismatec ISM901B Compact Programmable Digital Gear Pump Drive is an engineered solution for precise, repeatable fluid handling in laboratory, analytical, and industrial process environments. Designed around a brushless permanent-magnet DC (PMDC) motor architecture, the ISM901B delivers stable rotational control across a wide speed range (50–5000 rpm), enabling accurate volumetric delivery via external gear or peristaltic pump heads. Its core operational principle relies on digitally regulated motor torque and angular velocity—translating user-defined parameters (flow rate, total volume, elapsed time, or discrete cycles) into deterministic pump actuation without droplet carryover or post-dispense leakage. The drive’s compact footprint (17.8 × 17.8 × 13.5 cm) and IP44-rated housing ensure robust protection against dust ingress and incidental splashes, while its IP30 motor enclosure complies with standard indoor laboratory environmental requirements. Unlike analog controllers, the ISM901B integrates native RS-232 serial communication, permitting full remote command execution—including start/stop, autostart triggers, and real-time parameter updates—from host PCs running custom scripts or third-party SCADA/LIMS systems.

Key Features

• Dual-mode dispensing logic: supports continuous delivery (by flow rate, volume, or time) and interval-based operation (with programmable dispense/pause durations ranging from 0.1 seconds to 999 hours)
• Reversible motor control: enables bidirectional fluid transfer when paired with compatible reversible gear pump heads (e.g., Ismatec IPC or Reglo ICC series)
• Precision timing resolution: 0.1-second granularity for both dispense and pause intervals ensures high temporal fidelity in multi-step protocols
• Calibration-aware operation: accepts user-input calibration factors to compensate for tubing elasticity, fluid viscosity, and pump head geometry—improving volumetric accuracy across operating ranges
• Universal power compatibility: auto-switching 115/230 VAC input with 50/60 Hz support; shipped with interchangeable US and EU plugs
• Modular mechanical interface: includes A-mount adapter plate for direct integration with Ismatec Micropump® pump heads (excluding specified legacy models), plus integrated drive magnet for magnetic coupling

Sample Compatibility & Compliance

The ISM901B is not a standalone pump but a drive unit intended for use with externally mounted positive displacement pump heads—including gear, lobe, and diaphragm configurations rated for chemical compatibility with solvents, acids, bases, and aqueous buffers. It does not impose intrinsic fluid-contact limitations; compatibility is determined solely by the selected pump head and tubing materials (e.g., PTFE, Viton®, Santoprene®). From a regulatory standpoint, the drive meets IEC 61000-6-3 (EMC emission) and IEC 61000-6-2 (immunity) standards. Its RS-232 interface supports audit-trail-capable control architectures compliant with FDA 21 CFR Part 11 when implemented with validated software layers. While the unit itself carries no CE or UL certification mark, it is supplied with documentation supporting risk assessment under ISO 14971 and alignment with GLP/GMP installation qualification (IQ) protocols.

Software & Data Management

The ISM901B operates via ASCII-command protocol over RS-232, enabling integration into Python, LabVIEW, MATLAB, or custom C++ applications using standard serial libraries. Commands include SPD (set speed), VOL (set volume), TIM (set time), CYC (set cycle count), and DIR (direction control), all confirmed via response codes (e.g., “OK”, “ERR”). No proprietary software is bundled; however, Ismatec provides a public command reference manual and sample code repositories for common automation frameworks. For traceability-critical workflows, users may log command sequences, timestamps, and return statuses to CSV or SQL databases—facilitating retrospective analysis and electronic record retention per ALCOA+ principles. The absence of onboard memory means configuration persistence requires external controller management or script-based reinitialization at system boot.

Applications

• Automated reagent dosing in HPLC and IC sample introduction systems
• Controlled eluent delivery in ion chromatography gradient formation
• Periodic catalyst injection in continuous-flow microreactors
• Calibration standard delivery in environmental water testing labs (EPA Method 300.0, ASTM D511)
• Cell culture media exchange in bioreactor perfusion systems
• Low-flow solvent recycling loops in analytical sample preparation workstations

FAQ

Does the ISM901B include a pump head?
No—the ISM901B is a drive-only unit. Compatible pump heads must be purchased separately and mechanically mounted using the included A-mount adapter plate.
Can the ISM901B be used in explosion-proof environments?
Not without additional certification. The drive lacks ATEX or IECEx rating; integration into hazardous areas requires third-party enclosure validation.
Is firmware upgrade capability available?
Firmware is factory-programmed and non-upgradable in the field. Functional enhancements are delivered via updated hardware revisions (e.g., ISM901B → ISM901C).
What is the maximum recommended load inertia for connected pump heads?
The PMDC motor is rated for ≤0.002 kg·m² reflected inertia. Exceeding this may cause overshoot, reduced acceleration, or thermal derating.
How is calibration data stored and applied?
Calibration coefficients (e.g., µL/rpm) are applied in real time during command execution but are not retained in non-volatile memory—users must reapply them programmatically after each power cycle.