Hw-416-b Pir Sensor Datasheet < FHD 2026 >

The HW-416-B is a passive infrared (PIR) sensor module commonly used in motion detection applications, such as security systems, lighting control, and robotics. In this post, we'll provide an overview of the HW-416-B PIR sensor datasheet, including its features, specifications, and usage guidelines.

The fresnel lens in front of the sensor focuses IR radiation; sensitivity adjusts how much signal change is required to trigger the output. Higher sensitivity extends range but may increase susceptibility to false triggers from small animals or environmental fluctuations.

Approximately 32mm x 24mm (Standard compact footprint) 3. Pinout and Hardware Overview

int ledPin = D7; // Onboard LED int inputPin = D2; // Sensor input