SKU: SENS-0703
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Generic Force Sensitive Resistor RP-C18.3-ST (20g-6kg) - Thin-Film Flexible Sensor

₹176.00 (Inclusive of all taxes)
Out of Stock

The RP-C18.3-ST is a thin-film Force Sensitive Resistor (FSR) providing analog resistance output proportional to applied force from 20g to 6kg. Its compact, flexible design enables integration into embedded systems, robotics, and interactive interfaces compatible with Arduino, Raspberry Pi, and other microcontrollers via simple voltage divider circuits.

Features

  • Wide force sensing range from 20 grams to 6 kilograms (0.2N to 60N).
  • High-sensitivity thin-film resistive technology with sub-10ms response time.
  • Ultra-thin 0.4mm flexible form factor for integration into tight spaces.
  • Stable performance across an extended operating temperature of -40°C to +85°C.
  • Provides repeatable analog output with ±3% repeatability at 1kg load.

Out of stock

Description

The RP-C18.3-ST Force Sensitive Resistor operates on the principle of piezoresistivity, where applied force reduces the internal resistance of a specialized polymer film. This change creates a variable analog voltage signal when used in a simple voltage divider configuration, allowing microcontrollers to precisely measure force magnitude.

Engineered for reliability, the sensor exhibits minimal hysteresis and long-term drift, making it suitable for applications requiring consistent readings. Its robust construction ensures environmental adaptability, performing accurately across a broad industrial temperature range.

Key Features

  • Precision Thin-Film Sensing: Delivers highly responsive and linear resistance change corresponding directly to applied force.
  • Rapid Dynamic Response: Features a fast response time of less than 10 milliseconds for real-time force detection.
  • Robust Mechanical Endurance: Flexible substrate and durable contacts provide reliable operation under repeated loading cycles.
  • Extended Environmental Range: Maintains specified performance across temperatures from -40°C to +85°C.
  • Optimized Performance-to-Cost Ratio: Offers a high-value build for sensitive force measurement in cost-conscious designs.
  • Minimal Signal Drift: Engineered for stability with less than 5% drift under a 2.5kg load over 24 hours.

Applications

  • Robotic gripper and end-effector tactile feedback systems for precise object handling.
  • Medical device force monitoring in infusion pumps, rehabilitation equipment, and patient beds.
  • Interactive touch and pressure sensing for human-machine interfaces (HMI) and control panels.
  • Automotive seat occupancy detection and pedal force measurement systems.
  • Wearable device integration for gait analysis, sports biomechanics, and activity monitoring.

Technical Specifications

ModelRP-C18.3-ST
Force Range20 g to 6 kg (0.2 N to 60 N)
Actuation Force / Resistance20 g / 10 MΩ
Thickness0.4 mm
Shape / FlexibilityFlexible
Response Time< 10 ms
Repeatability (@ 1 kg)±3%
Hysteresis (@ 1 kg)+10%
Drift (2.5 kg load, 24H)< 5%
Operating Temperature-40°C to +85°C
Output TypeAnalog Resistance

Frequently Asked Questions

What is the output signal type of the RP-C18.3-ST sensor and how do I interface it with a microcontroller?

The sensor provides a variable analog resistance output. To read it with a microcontroller like Arduino, you must create a voltage divider circuit by connecting the FSR in series with a fixed resistor (e.g., 10kΩ) between Vcc and GND. The voltage at the junction between the resistor and the FSR is read by an analog input pin. This voltage changes proportionally with the applied force.

What is the recommended circuit for debouncing or conditioning the FSR signal?

For stable readings, a simple RC low-pass filter can be added to the voltage divider's output node to reduce electrical noise. For digital threshold detection, the conditioned analog signal can be fed into a comparator. Ensure your power supply is clean and stable, as the sensor's resistance reading is sensitive to the reference voltage.

How should the RP-C18.3-ST be mounted, and what are its durability considerations?

Mount the flexible sensor using adhesive backing or by securing its inactive peripheral area. Avoid Sharp Microelectronics bends or creases in the active sensing area. The sensor is designed for repeated use but is not intended for point-load impacts or forces exceeding its 6kg maximum. For long-term reliability, protect the sensing film from abrasion and corrosive environments.

Package Includes

  • 1 x Force Sensitive Resistor RP-C18.3-ST (20g-6kg)