This water flow sensor has a pinwheel sensor inside it which helps the sensor detect how much liquid has passed through it. By counting pulses from the output of the sensor water flow can be calculated. Each pulse is approximately 2.25 millimeters.
₨ 749 ₨ 936
HC-SR501 passive infrared motion sensor for Arduino-compatible alarms, automatic lighting and occupancy prototypes. It provides adjustable sensitivity and output delay, plus repeatable or non-repeatable trigger modes. Allow a warm-up period and test the installed detection area before relying on the output.
MQ-7 carbon-monoxide sensor module with analog response and an adjustable digital threshold output for Arduino-compatible educational monitoring prototypes. Correct heater cycling, warm-up and calibration are required. This module is not a certified carbon-monoxide alarm and must not be used as life-safety equipment.
4.5-inch resistive flex sensor for Arduino-compatible bend, posture, wearable-control and robotics experiments. Resistance increases as the active strip bends. Read it through a voltage-divider circuit, calibrate it in the finished assembly and protect the base and connector from sharp bends or repeated strain.
Ultrasonic Sensor HC-SR04 
Microphone Sound Sensor Module 
Vibration Sensor SW-420 
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