Is the sensitivity adjustable?

Yes there are two pots on the board you can use to adjust. Check the web for how to do it.

Can i hook this directly to the item i want to switch? it’s dc current.

WRCoyle is pretty much wrong on their answer. I'm assuming you want to turn electricity on to another device with this? The answer to that is no. This provides a logic output that is high when it is triggered and low when on standby. The BISS0001 chip on this has the output pin rated for 10mA and it goes straight to the out pin on the board, no transistor used to handle more power. It can run a regular LED using a resistor to limit the LED to 10mA or less. Beyond that, you will need a transistor or solid state relay or some other setup to handle any amount of current.

How would you describe the range and sensitivity of these? I need to detect when motion stops in a 12x14 room of people.

It will sense any movement (heating moving paper) in a room of that size

Could this be used to replace a faulty IR sensor on animated halloween props?

The pir sensor should work but the output is simply a logic level output. It will not provide much current.

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HC-SR501 Pir Motion IR Sensor

Product ID: 19860536

Details

Brand
DIYmall
Color
HC-SR501
Item Weight
1.58 ounces
Maximum Range
15 feet
Power Source
Corded

📏0.5s to 200s adjustable timing

📡15 feet max detection range

🔧DIY solder jumper for retrigger control

NZ$30

Duties & taxes included

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Description

🚀 Elevate your smart space with precision motion sensing—don’t get left in the dark!

DIY CUSTOMIZATION - Solder jumper retrigger option lets you personalize sensor responsiveness like a pro.
BULK PACK ADVANTAGE - Five sensors in one pack to power multiple projects or scale your smart environment effortlessly.
VERSATILE APPLICATION - Perfect for security systems, smart lighting, and industrial automation—your all-in-one motion solution.
EXTENDED DETECTION RANGE - Reliable motion sensing up to 15 feet ensures your smart projects catch every move.
PRECISION TIMING CONTROL - Fine-tune detection duration from half a second up to 200 seconds for tailored automation.

The DIYmall 5 Pack HC-SR501 PIR Motion IR Sensor modules offer adjustable timing from 0.5 to 200 seconds and detect motion up to 15 feet. Designed for Arduino and compatible with various automation projects, these sensors feature a solder jumper for retrigger control and come in a convenient 5-pack, ideal for security, lighting, and industrial applications.

Specifications

ASIN	B012ZZ4LPM
Antenna Location	Security Products
Best Sellers Rank	#22,663 in Electronics ( See Top 100 in Electronics ) #104 in Motion Detectors (Electronics)
Brand	DIYmall
Color	HC-SR501
Compatible Devices	Incandescent Lamp
Customer Reviews	4.3 out of 5 stars 544 Reviews
Item Weight	1.58 ounces
Manufacturer	DIYmall
Maximum Range	15 feet
Mfr Part Number	FZ0057-
Model Number	4331029690
Mounting Type	Wall Mount
Number of Items	5
Number of Packs	5
Power Source	Corded Electric
UPC	717520589952

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