MQ-2 Gas Sensor Module – Smoke, LPG, Butane, Methane Detection

Description The HC-SR04 Ultrasonic Sensor Module is a popular, low-cost sensor used to measure distance using ultrasonic sound waves. It emits ultrasonic pulses and detects their echo to calculate distance from an object. It’s widely used in obstacle avoidance systems, robotics, automation, and DIY security systems. Features: Low-cost and easy to use Accurate non-contact distance measurement Operates at 40kHz ultrasonic frequency Easy 4-pin interface: VCC, Trig, Echo, GND Works with Arduino, ESP32, Raspberry Pi and more Specifications: Operating Voltage: 5V DC Detection Range: 2cm to 400cm Resolution: 0.3 cm Accuracy: ±3 mm Measuring Angle: ≤15° Dimensions: 45mm x 20mm x 15mm Package Includes:1 x HC-SR04 Ultrasonic Sensor Module