HW-416-B PIR Sensor Datasheet: Pinout, Specifications, and Application Guide
Introduction
The HW-416-B is one of the most popular and cost-effective Passive Infrared (PIR) motion sensor modules available in the electronics market. Often found in Arduino starter kits, security lighting projects, and automatic door systems, this module is frequently compared to its predecessor, the HC-SR501. However, the HW-416-B offers distinct advantages in terms of size, power consumption, and adjustability.
| Feature | HW-416-B | HC-SR501 |
| :--- | :--- | :--- |
| Size | Smaller (32x24mm) | Larger (32x24mm approx, thicker) |
| Quiescent Current | < 50 µA | < 65 µA |
| Adjustable Time Delay | Usually fixed or very short (2.5s) | Yes (0.3s – 600s) |
| Retriggering Mode | Internal (automatic) | Jumper-selectable (single/retrigger) |
| Best for | Battery-powered, short-lived triggers | Security lights, long delays | hw-416-b pir sensor datasheet
Typical performance scenarios
Indoor corridor: Reliable detection of walking adult at 5–8 m, 110° coverage across corridor width.
Small room (4×4 m): Single sensor on wall or ceiling will cover most walking paths; sensitivity tuning reduces false triggers.
Pet detection: Smaller thermal signatures may reduce detection distance; sensitivity adjustment can help, but pets under ~2–3 kg may not reliably trigger.
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HW-416-B PIR Sensor Datasheet: Pinout, Specifications, and Application Guide
Introduction
The HW-416-B is one of the most popular and cost-effective Passive Infrared (PIR) motion sensor modules available in the electronics market. Often found in Arduino starter kits, security lighting projects, and automatic door systems, this module is frequently compared to its predecessor, the HC-SR501. However, the HW-416-B offers distinct advantages in terms of size, power consumption, and adjustability.
| Feature | HW-416-B | HC-SR501 |
| :--- | :--- | :--- |
| Size | Smaller (32x24mm) | Larger (32x24mm approx, thicker) |
| Quiescent Current | < 50 µA | < 65 µA |
| Adjustable Time Delay | Usually fixed or very short (2.5s) | Yes (0.3s – 600s) |
| Retriggering Mode | Internal (automatic) | Jumper-selectable (single/retrigger) |
| Best for | Battery-powered, short-lived triggers | Security lights, long delays |
Typical performance scenarios
Indoor corridor: Reliable detection of walking adult at 5–8 m, 110° coverage across corridor width.
Small room (4×4 m): Single sensor on wall or ceiling will cover most walking paths; sensitivity tuning reduces false triggers.
Pet detection: Smaller thermal signatures may reduce detection distance; sensitivity adjustment can help, but pets under ~2–3 kg may not reliably trigger.
Pinout and Connections
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