can these be hooked in a circuit without an Arduino

I should think so. You just need a way of reading the values coming from the sensor to detect motion.

range please - how far away can it be from the surface that you are measuring?

Depends on the sensitivity setting. I have had no problems in the 2 to 3 meter range which is perfect for my uses. Also, this is an infrared sensor that senses motion, so if your surface is stationery, you might consider an ultrasonic sensor instead.

What is the field of view at 20 ft.?

It's pretty good, full range in 2 more feet

What are the dimensions of this? Specifically looking at the depth of the white dome and size of the white square. Trying to hide in woodworking.

From the dome top to the top of the square is .5" The square is .913" on a side

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HiLetgo 3pcs HC-SR501 PIR Infrared Sensor Human Body Infrared Motion Module for Arduino Raspberry Pi

HiLetgo 3pcs HC-SR501 PIR Infrared Sensor Human Body Infrared Motion Module for Arduino Raspberry Pi

Product ID: 103560846

Details

Brand
HiLetgo
Color
Black Green
Item Weight
22.95 g
Maximum Range
2 meters
Mounting Type
Wall Mount

⏳5-200s adjustable delay

⚡4.5-20V wide voltage range

📐<100° detection angle

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Description

🚀 Elevate your smart projects with motion sensing that never sleeps!

COMPACT VERSATILE DESIGN - Small 32x24mm board fits discreetly in security, automation, and lighting projects.
PLUG PLAY SMART DETECTION - Seamlessly integrates with Arduino & Raspberry Pi for instant motion sensing.
ULTRA LOW POWER CONSUMPTION - Consumes less than 50µA, maximizing energy efficiency for continuous operation.
RELIABLE MULTI TRIGGER MODES - Supports repeated or single triggers to tailor alerts and automation precisely.
CUSTOMIZABLE SENSITIVITY TIMING - Adjust detection delay from milliseconds to minutes to fit any environment.

The HiLetgo HC-SR501 PIR Infrared Sensor is a compact, energy-efficient motion detection module compatible with Arduino and Raspberry Pi. Operating between 4.5V and 20V, it features a wide <100° detection angle and adjustable delay times from fractions of a second up to 200 seconds. Ideal for security, automation, and smart lighting, this 3-pack offers reliable, customizable motion sensing to enhance any professional or home project.

Specifications

ASIN	B07KZW86YR
Antenna Location	Sidewalk, Driveway
Best Sellers Rank	#10,052 in Electronics ( See Top 100 in Electronics ) #45 in Motion Detectors (Electronics)
Brand	HiLetgo
Color	Black, Green, White, Yellow
Compatible Devices	Arduino, Raspberry Pi
Customer Reviews	4.4 4.4 out of 5 stars (384)
Item Weight	22.95 g
Manufacturer	HiLetgo
Maximum Range	2 meters
Mfr Part Number	3-01-0120
Model Number	3-01-0120
Mounting Type	Wall Mount
Number of Items	3
Number of Packs	3
Operating Temperature	50 °C

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60.69 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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