3 in 1 pH, TDS and Temperature Meter

The HC-SR501 PIR Motion Detector Sensor Module is a pyroelectric device that detects motion by measuring changes in the infrared levels emitted by surrounding objects. This motion can be detected by checking for a high signal on a single I/O pin.

The module has an onboard pyroelectric sensor, conditioning circuitry, and a dome-shaped Fresnel lens. It has a delay time adjustment Potentiometer and sensitivity adjustment Potentiometer.

It is used to sense the movement of people, animals, or other objects. They are commonly used in burglar alarms and automatically-activated lighting systems. Compatible with ARDUINO, RASPBERRY PI, AVR, PIC, 8051, etc.

Features:

• Compact size
• Infrared sensor: dual-element, low noise, high sensitivity
• Blockade time: 2.5s (Default)
• Infrared Sensor with Control Circuit Board
• The Sensitivity and Holding Time Can be Adjusted
• Sensitive Setting: Turn to Right, Distance Increases (About 7M); Turn to Left, Distance Reduce (About 3M)
• Time Setting: Turn to Right, Time Increases (About 200S); Turn to Left, Time Reduce (About 5S).

• Infrared Obstacle Avoidance IR Sensor Module (Active Low) contains a pair of infrared transmitting and receiving tubes. When the transmitted light waves are reflected back, the reflected IR waves will be received by the receiver tube. The onboard comparator circuitry does the processing and the green indicator LED comes to life.
• Mounting hole | Adjustable Range Detection | LED Indicators | Built-in Ambient Light Sensor | Infrared transmitting and receiving tubes | Onboard comparator circuitry | Easy to assemble | Easy to use
• LxWxH : 48 x 14 x 8 mm
• The IR sensor module can be widely used for robot obstacle avoidance, obstacle avoidance car assembly line count, black-and-white line tracking and many other occasions. This sensor module can be used for obstacle detection in autonomous robots and cars, in positional feedback for control system, industrial safety system, wheel encoder etc.
• Main Chip : LM393 Operating Voltage (VDC) : 3.6 ~ 5 Average Current Consumption (mA) : 0.06 Detection Angle : 35 ° Distance Measuring Range : 2 – 30 cm