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HC-SR501 PIR Sensor (Passive Infrared Sensor) + IR Proximity Sensor
The HC-SR501 PIR Motion Sensor Module allows you to sense motion. It is almost always used to detect the motion of a human body within the sensor’s range. It is often referred to as “PIR”, “Pyroelectric”, “Passive Infrared” and “IR Motion Sensor” sensors. The PIR Motion sensor module has an onboard pyroelectric sensor, conditioning circuitry, and a dome-shaped Fresnel lens.
The PIR Sensor has a delay time adjustment Potentiometer and a sensitivity adjustment Potentiometer. Repeat Trigger Selection Jumper is also available. Compatible with Arduino, Raspberry Pi, NODE MCU, PIC, 8051, etc.
The IR Proximity Sensor module has great adaptive capability of the ambient light, having a pair of infrared transmitters and a receiver tube, the infrared emitting tube emits a certain frequency, encounters an obstacle detection direction (reflecting surface), and infrared reflected back to the receiver tube receiving, after a comparator circuit processing, the green LED lights up, while the signal output will output digital signal (a low-level signal), through the potentiometer knob to adjust the detection distance, the effective distance range 2 ~ 10cm working voltage of 3.3V-5V.
The detection range of the PIR sensor can be adjusted by the potentiometer, with little interference, easy to assemble, easy-to-use features that can be widely used for robot obstacle avoidance, obstacle avoidance car assembly line count, black-and-white line tracking, and many other occasions.
Check out our entire range of IR Proximity Motion Sensors
read our blog explaining the infrared sensor working principle, Learn about the components, physics laws involved, and their applications in proximity sensing, item counting, burglar alarms, and more.
PIR Sensor Pinout:
IR Proximity Sensor Pinout:
Applications:
- PIR sensors are used in thermal sensing applications, such as security and motion detection.
- The IR Sensor can be used in IP cameras.
- The PIR sensors are also used for Alarm systems and other crime-prevention devices.
- The IR sensor can be used for battery-driven human presence sensors for IoT smart homes.
Read our blog about how does a proximity sensor work where we discuss what proximity sensors are, the features of proximity sensors, how does proximity sensor work, and the different types of proximity sensors.
read our blog explaining the working principle of pir sensor, provides comprehensive information about Passive Infrared (PIR) sensors.
Package Includes:
- 1 x HCSR501 PIR Motion sensor module
- 1 x IR Proximity Sensor module
Specifications of PIR Sensor Module:
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Model
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HCSR501 PIR sensor
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Operating Voltage
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4.5 ~ 20V
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Average Current Consumption (mA)
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0.06
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Distance Measuring Range (cm)
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300 ~ 700
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Dimensions
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32 x 24 x 18 mm
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Weight
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15 grams
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Specifications of IR Proximity Sensor Module:
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Main Chip
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LM393
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Operating Voltage
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3.3 ~ 5 VDC
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Distance Measuring Range
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2 ~ 30 CM
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Dimensions
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48 x 14 x 8 mm
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Weight
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15 grams
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Return Policy Overview
At ROBODIUM™, we want you to be completely satisfied with your purchase. You may return most items within 7 days of delivery for a full refund or exchange.
Return Window
- Standard Returns: 7 days from delivery date for any reason, including change of mind.
- Defective / Damaged Items: 7 days from delivery date.
- Manufacturing Defects (Warranty): 15 days from delivery, unless otherwise specified on the product page.
What Can Be Returned
Most items sold on ROBODIUM™ can be returned within the return window, including:
- Items you no longer need or changed your mind about
- Products received in damaged condition
- Items with manufacturing defects
- Wrong items received (item mismatch)
- Missing components inside the package
Return Conditions
To be eligible for a return, items must be:
- In their original, unused condition
- In the original packaging with all accessories, manuals, and free gifts (if any)
- Accompanied by proof of purchase
Note: Products damaged due to misuse, modification, static discharge, soldering, or improper handling may not be eligible for return.
How to Initiate a Return
- Contact us via email at support@robodium.com or call +91 8123109966
- Provide your order number and reason for return
- Submit photos/videos of the item (mandatory for damaged or defective products)
- Our team will review and approve your request within 1–2 business days
Return Pickup Process
We arrange the return pickup for you — hassle-free returns similar to major e-commerce platforms.
- Pickup is coordinated after return approval
- Pack the product securely in its original packaging
- Include a copy of the order confirmation or packing slip
- Our logistics partner will collect the package at the scheduled time
Return Shipping Costs
- Defective, damaged, or wrong items: ROBODIUM™ covers all return shipping costs.
- Change-of-mind returns: ₹100 return shipping fee will be deducted from the refund.
Refund Process
- Refund Method: Original payment method
- Processing Time: 5–7 business days after inspection
- Refund Amount: Full purchase price minus applicable return shipping fees
- Orders canceled before shipping receive a full refund (minus up to 5% payment gateway charges, if applicable)
Replacements
- Replacement is shipped after the returned item is inspected and approved
- Dispatched within 2 business days of receiving the return
- If replacement is unavailable, a full refund will be issued
Warranty Terms
All products include a minimum 15-day warranty against manufacturing defects, unless otherwise specified on the product page.
Warranty does not cover misuse, soldering damage, modifications, physical damage, or incorrect electrical connections.
Order Cancellations
- Orders in Pending or Payment Verification status can be canceled for a full refund
- Contact us immediately before shipping to cancel an order
- Once shipped, orders cannot be canceled but can be returned after delivery
Customer Service Commitment
- Email response within 24 hours on business days
- Phone support: Monday–Saturday, 10:00 AM – 6:00 PM IST
- Return request review: 1–2 business days
- Issue resolution within 48 hours of verification
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