RP-L-170 Thin Film Pressure Sensor (FSR) 170x15mm

The RP-L-170 from DFRobot is a thin film pressure sensor (FSR) with a strip-shaped sensing area 170 mm long. Its resistance drops the harder the sensing area is pressed: above 10 MΩ unloaded, below 200 kΩ when triggered. With a fixed resistor as a voltage divider, an Arduino reads the force on an analog input. According to DFRobot, the sensor is suitable for detecting and comparing pressure; for accurate force measurements the deviations are too large.

With ready-made evaluation board and Gravity connector: Gravity Thin Film Pressure Sensor

Recommended Accessories:

• Resistance Set 600 pcs. Assorted 1/4W 1% Accuracy
• Breadboard / Hole Grid Plug-In Board Half-Size
• Dupont Jumper Cable Set 20cm 60 Pieces.

Features:

• Resistance drops with increasing force, characteristic curve in the DFRobot wiki
• Static and dynamic pressure up to 10 Hz
• Trigger force below 20 g, measuring range 20 g to 10 kg or more
• Activation time below 0.01 s, response time below 10 ms
• Over 1 million load cycles
• Generates no electromagnetic interference
• With very small and very large forces the curve becomes steep or flat, so mainly for qualitative measurements (DFRobot)
• 2 connection pins, in the DFRobot example on a breadboard with a voltage divider to A0

Application Examples:

• Pressure switches and buttons without mechanics
• Occupancy of beds and seats
• Shoe soles and motion analysis
• Grip force and contact detection in robots

Documentation:

• Wiki DFRobot SEN0293 with example code for Arduino

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0293
• Type: RP-L-170
• Thickness: 0.35 mm
• Trigger force: below 20 g (resistance below 200 kΩ)
• Measuring range: 20 g to 10 kg or more
• Initial resistance: above 10 MΩ
• Activation time: below 0.01 s
• Response time: below 10 ms
• Measuring frequency: up to 10 Hz
• Hysteresis: +10 % (1000 g)
• Drift: below 5 % (2.5 kg, 24 h static)
• Lifespan: over 1 million cycles
• Operating temperature: -40 to +85 °C
• Dimensions: 175 × 15 × 0.35 mm
• Weight: 3 g

Scope of Delivery:

• 1× RP-L-170 Thin Film Pressure Sensor (FSR)