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

Product ID: 256334295

Details

Brand
HiLetgo
Colour
white
Item weight
0.81 Ounces
Maximum range
2 Meters
Power source
DC Power

⏳Adjustable 5-200s delay time

⚡4.5-20V wide voltage range

📐<100° detection angle

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Description

🚀 Elevate your smart projects with motion sensing precision!

COMPACT VERSATILE DESIGN - Small 32x24mm footprint with a 23mm lens diameter fits discreetly in any smart home or industrial setup.
PLUG PLAY SMART DETECTION - Seamlessly integrates with Arduino & Raspberry Pi for instant motion sensing innovation.
ULTRA LOW POWER CONSUMPTION - Consumes less than 50µA quiescent current—energy-efficient for 24/7 operation without draining your power budget.
MULTI USE SECURITY AUTOMATION - Ideal for smart lighting, alarms, automatic doors, and industrial controls—stay ahead in safety and convenience.
CUSTOMIZABLE SENSITIVITY TIMING - Adjust delay from fractions of a second up to 200 seconds to perfectly match your automation needs.

The HiLetgo HC-SR501 PIR Infrared Sensor is a compact, energy-efficient motion detection module compatible with Arduino and Raspberry Pi. Operating on a wide voltage range (4.5-20V) and featuring an adjustable delay time (5-200 seconds) with a <100° detection angle, it’s perfect for smart security, lighting automation, and industrial control applications. This 3-pack offers reliable, customizable motion sensing to future-proof your smart environment.

Specifications

ASIN	B07KZW86YR
ASIN	B07KZW86YR
Antenna Location	Sidewalk, Driveway
Battery Description	Battery not included
Best Sellers Rank	#4,193 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #5 in Motion Detectors
Brand	HiLetgo
Color	white
Compatible Devices	Arduino, Raspberry Pi
Customer Reviews	4.4 4.4 out of 5 stars (364)
Customer reviews	4.4 4.4 out of 5 stars (364)
Date First Available	19 December 2018
Is Discontinued By Manufacturer	No
Item Weight	0.81 Ounces
Item model number	3-01-0120
Manufacturer	HiLetgo
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 Degrees Celsius
Package Dimensions	9.19 x 5.59 x 3.4 cm; 22.96 g
Power Source	DC Power Supply

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₨137

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered 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 Seychelles.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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