LongerPump FK-1C Peristaltic Pump Dispensing Controller

Overview

The LongerPump FK-1C Peristaltic Pump Dispensing Controller is a precision timing-based dispensing interface engineered for integration with a broad range of peristaltic pumps—including standard OEM and laboratory-grade models from LongerPump and third-party manufacturers. It operates on a deterministic time-controlled principle: fluid volume delivery is governed by pump speed (RPM), tubing inner diameter, and precisely calibrated run/pause intervals—enabling repeatable, volumetrically consistent aliquoting without direct flow sensing. Unlike pressure- or gravimetric-based dispensers, the FK-1C relies on temporal actuation synchronized with pump motor operation, making it especially suitable for applications where simplicity, electromagnetic immunity, and mechanical robustness are prioritized over real-time flow feedback. Designed for benchtop use in QC labs, bioprocessing workflows, and chemical synthesis setups, the controller delivers high reproducibility in low-to-medium throughput dispensing tasks where ±1% volumetric consistency is sufficient under stable pump-tubing conditions.

Key Features

• Multi-mode dispensing logic: supports single-run, continuous-run, internal forward/reverse counting, external pulse-triggered counting, and dry-contact external start initiation
• High-resolution timing engine: 0.01-second resolution across independent run-time and pause-time parameters, enabling fine-grained control over dispense cycles
• Non-volatile memory: retains all user-configured parameters—including time values, count modes, and external trigger states—during power interruption
• Scalable external control architecture: accepts TTL-compatible or relay-closed signals for synchronization with PLCs, LIMS triggers, or automated liquid handling platforms
• Low-power, industrial-grade design: 5 W nominal consumption with 220 V AC input; no internal battery or fan required, supporting unattended 24/7 operation in controlled environments
• OEM-integrated compatibility: standardized I/O pinout and voltage thresholds align with LongerPump’s DC-powered pump drivers (e.g., BT100-2J, WT600-2J) and common third-party controllers

Sample Compatibility & Compliance

The FK-1C does not contact samples directly and imposes no material restrictions—its compatibility is defined entirely by the connected peristaltic pump and tubing selection. When paired with chemically resistant tubing (e.g., PharMed BPT, Tygon® E-3603, or silicone formulations), the system handles aqueous buffers, organic solvents, mild acids/bases, and cell culture media. No regulatory certification (e.g., FDA 510(k), CE IVD, or UL listing) applies to the FK-1C as a standalone controller; however, when integrated into validated equipment under ISO 13485 or GMP frameworks, its deterministic timing behavior supports auditability. All time and count parameters are traceable via front-panel LED display, and configuration changes are manually logged—consistent with GLP documentation requirements for non-automated instrumentation.

Software & Data Management

The FK-1C is a hardware-only controller with no embedded firmware update capability or digital communication interface (e.g., RS-232, USB, or Ethernet). Configuration is performed exclusively via tactile membrane buttons and a 4-digit LED display. While it lacks native data export or PC connectivity, its external pulse input and dry-contact output enable integration into broader automation ecosystems: external PLCs can log cycle timestamps, aggregate dispense counts, and enforce interlock sequences per SOP-defined protocols. For regulated environments requiring electronic records, the controller may be deployed within systems compliant with FDA 21 CFR Part 11 when paired with validated supervisory software that captures and signs all operational events—including start/stop commands, count completions, and error flags (e.g., timeout or missing pulse).

Applications

• Automated reagent dispensing in ELISA, PCR setup, and microplate assay preparation
• Sequential buffer exchange in chromatography system priming and column equilibration
• Controlled feed addition in small-scale bioreactors and fermentation vessels
• Calibration standard preparation in analytical chemistry labs using fixed-volume aliquots
• Teaching laboratories for demonstrating volumetric repeatability, timing control, and pump-tubing flow relationships
• Integration into custom-built fluidic workstations where deterministic, low-cost dispensing logic is required

FAQ

Does the FK-1C support real-time flow rate feedback or closed-loop control?

No. The FK-1C is an open-loop timer controller. Flow accuracy depends entirely on the stability of the connected pump’s rotational speed and the physical properties of the tubing.
Can it be used with peristaltic pumps from brands other than LongerPump?

Yes—provided the pump accepts simple ON/OFF or direction/speed control via dry-contact or TTL-level signals compatible with the FK-1C’s output specifications.
Is there a way to log dispensing events electronically?

Not natively. Event logging requires external hardware (e.g., PLC or data acquisition module) connected to the FK-1C’s external pulse output or status lines.
What happens to settings during a power outage?

All time, count, and mode settings are retained in non-volatile memory and restored automatically upon power-up.
Does it comply with electromagnetic compatibility (EMC) standards?

The unit meets basic industrial EMC immunity per IEC 61326-1 Class A requirements for laboratory use, though formal test reports are not supplied with standard units.