The **18KPP-122-R/S** refers to a specific series of **Miniature Peristaltic Pumps** manufactured by Takasago Electric (or similar specialized fluidic component manufacturers). These parts are designed for precision fluid handling in medical, analytical, and laboratory equipment. --- ### 1. Technical Specifications The part number "18KPP-122-R/S" can be broken down into its functional components: | Feature | Specification | | :--- | :--- | | **Component Type** | Peristaltic Pump (Roller-based) | | **Drive Voltage** | Typically 12V or 24V DC (Model dependent) | | **Flow Rate** | Approx. 100 - 150 ml/min (Depending on tube size) | | **Tubing Material** | Silicone, PharMed, or Norprene (R/S indicates tube type/size) | | **Motor Type** | Brushed DC Motor | | **Housing Material** | Polyacetal / PPS Plastic | --- ### 2. Electronic Operating Principles The 18KPP series operates through a combination of mechanical and electronic integration: * **DC Motor Drive:** The unit is powered by a standard DC motor. Speed control is achieved via **PWM (Pulse Width Modulation)**. By varying the duty cycle of the voltage, the rotational speed of the rollers—and thus the flow rate—can be precisely managed. * **Rotary Action:** The electronic motor drives a rotor with rollers. These rollers compress a flexible tube, creating a vacuum that "pushes" the fluid through the system (peristalsis). * **Directional Control:** By reversing the polarity of the DC input, the pump can operate in both clockwise and counter-clockwise directions, allowing for bidirectional fluid flow. --- ### 3. Key Electronic Features * **Low Power Consumption:** Designed for battery-operated or energy-efficient medical devices. * **Electromagnetic Compatibility (EMC):** Often includes internal suppression to prevent electrical noise from interfering with sensitive sensors in analytical instruments. * **Compact Footprint:** The "18" in the series usually denotes a small form factor (approx. 18mm-25mm width), making it suitable for PCB mounting or tight enclosures. --- ### 4. Common Applications 1. **Medical Diagnostics:** Reagent dispensing in IVD (In-Vitro Diagnostics) machines. 2. **Environmental Monitoring:** Sampling water or air for chemical analysis. 3. **Inkjet Printing:** Managing ink flow and waste suction. 4. **Laboratory Automation:** Precise titration and liquid handling.