SKU: SENS-1866
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Senba SB312A PIR Sensor Module - Digital Output, 3-12V DC

₹379.00 (Inclusive of all taxes)
Out of Stock

The Senba SB312A is a compact digital PIR (Passive Infrared) sensor module designed for human body detection, compatible with 3.3V and 5V microcontroller systems like Arduino, Raspberry Pi, and ESP32. It provides a simple high/low digital output signal upon detecting motion within its 100° field of view.

Features

  • Digital PIR sensor with integrated Fresnel lens for reliable motion detection.
  • Wide operating voltage range from 3V to 12V DC for flexible system integration.
  • Ultra-low quiescent current of ≤20µA for battery-powered applications.
  • Provides a clean 3V high-level output signal; standby output is 0V.
  • Compact PCB footprint measuring just 10mm x 8mm for space-constrained designs.

Out of stock

Description

The SB312A module integrates a dual-element, low-noise pyroelectric infrared sensor with a Fresnel lens onto a single PCB, eliminating the need for external signal conditioning ICs. This digital design enhances signal stability and simplifies interfacing by outputting a direct TTL-compatible high/low signal upon detecting infrared radiation changes, typically caused by human motion.

Engineered for reliable performance, the module features configurable timing parameters including a 2.3-second output delay and a 2.3-second blockade time, supporting a repeatable trigger mode. Its robust construction ensures stable operation across an industrial temperature range of -20°C to +55°C, making it suitable for both indoor and protected outdoor environments.

Key Features

  • High-sensitivity dual-element PIR sensor for accurate human presence detection.
  • Integrated Fresnel lens provides a wide detection angle of ≥100° and a range of 3 to 5 meters.
  • Digital output provides improved noise immunity and simplified microcontroller interfacing.
  • Ultra-low power consumption design ideal for always-on, battery-operated security and automation nodes.
  • Compact and durable PCB construction optimized for high-value integration into finished products.
  • Fixed, non-adjustable timing parameters ensure predictable and consistent trigger behavior.

Applications

  • Automatic lighting control and energy-saving systems in rooms and corridors.
  • Intrusion detection and security alarm systems for homes and small businesses.
  • Occupancy sensing for smart HVAC and ventilation control.
  • Motion-activated triggers for interactive displays, signage, or automated doors.
  • Battery-powered wireless sensor nodes for IoT-based presence monitoring.

Technical Specifications

Model NumberSB312A
Sensor TypeDigital PIR (Passive Infrared)
Operating VoltageDC 3V to 12V
Quiescent Current≤ 20 µA
Output SignalHigh Level: 3V, Standby: 0V
Detection Range3 to 5 meters
Detection Angle≥ 100°
Lens Diameter13.5 mm
Output Delay Time2.3 seconds
Blockade Time2.3 seconds
Trigger ModeRepeatable
Operating Temperature-20°C to +55°C
Module Dimensions (L x W)10 mm x 8 mm

Frequently Asked Questions

What is the output signal type of the SB312A PIR module?

The SB312A provides a digital TTL-level output. When motion is detected, the VOUT pin outputs a high-level signal of approximately 3V. In standby (no motion), the output is 0V. This simple high/low signal is directly compatible with the digital input pins of most microcontrollers like Arduino, ESP32, or Raspberry Pi GPIO.

What is the operating voltage range, and can I power it directly from a 5V Arduino pin?

The module operates from a wide DC input range of 3V to 12V. You can power it directly from a 5V regulator on an Arduino board or a 3.3V source on an ESP32. The quiescent current is very low (≤20µA), making it safe to power from a microcontroller's GPIO pin if current limits are observed, though a dedicated supply is recommended for reliability.

Are the delay and blockade times adjustable on this module?

No, the timing parameters on the SB312A module are fixed and non-adjustable. The output remains high for a fixed delay of approximately 2.3 seconds after motion is detected. Following this, a fixed blockade time of 2.3 seconds is enforced during which the sensor will not trigger again, preventing rapid re-triggering.

What is the detection pattern and maximum range?

The integrated Fresnel lens creates a wide detection field with an angle of ≥100 degrees. The effective detection range for human-sized movement is typically between 3 to 5 meters under standard conditions. The actual range can be influenced by the size and temperature of the moving object, as well as environmental factors.

Package Includes

  • 1 x Senba SB312A PIR Sensor Module

Additional Information

Weight 0.03 kg
Dimensions 1 × 0.8 cm