SKU: SENS-1863
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Senba HM412 Digital Long Distance PIR Sensor, Delay Time Adjustable Sensor

₹112.00 (Inclusive of all taxes)
Out of Stock

The Senba HM412 is a digital intelligent PIR motion sensor module featuring DSP for reliable detection up to 10 meters. It operates on a low 2.7-3.3VDC supply and provides a Schmitt trigger relay output, making it suitable for integration into Arduino, Raspberry Pi, and other microcontroller-based security and automation systems.

Features

  • Digital Signal Processing (DSP) for enhanced noise immunity and stable performance.
  • Long-distance detection range of 8 to 10 meters with adjustable delay from 2 seconds to 80 minutes.
  • Low-voltage operation (2.7-3.3VDC) with minimal power consumption for battery-powered applications.
  • Schmitt trigger relay output ensures clean switching signals for direct control of lights or alarms.
  • Built-in temperature compensation and RF interference filtering for reliable operation in varied environments.

Out of stock

Description

The Senba HM412 Digital PIR Sensor integrates a complete motion detection solution within a compact housing, utilizing advanced digital signal processing to filter out environmental noise and false triggers. Its two-way differential high-impedance sensor input, combined with temperature compensation, ensures consistent sensitivity across its operating range of -25°C to 85°C.

This sensor is designed for low-voltage embedded systems, drawing minimal current to enable long-term operation in battery-powered devices. The adjustable delay timer allows for precise control over the activation period following motion detection, from a brief 2-second pulse to extended durations up to 80 minutes, catering to diverse automation and security scenarios.

Key Features

  • Intelligent Digital PIR with integrated DSP circuitry.
  • Wide, adjustable detection delay from 2 seconds to 80 minutes.
  • Excellent power supply rejection ratio (PSRR) and RF interference immunity.
  • Low operating voltage range (2.7V to 3.3V DC) for energy-efficient designs.
  • Schmitt trigger output provides a clean, debounced digital signal.
  • Robust operating temperature range from -25°C to +85°C.
  • Compact form factor with a standard 4-pin interface for easy integration.

Applications

  • Automatic lighting control for indoor corridors, stairwells, and storage rooms.
  • Intruder detection and occupancy sensing in security alarm systems.
  • Energy-saving triggers for smart home appliances like TVs and air conditioners.
  • Motion-activated triggers for network cameras and surveillance monitors.
  • Battery-powered USB alarms and toy activation mechanisms.

Technical Specifications

Model NumberHM412
Sensor TypeDigital PIR (Passive Infrared)
Operating Voltage2.7 - 3.3 VDC
Output SignalSchmitt Trigger REL (Relay)
Detection Range8 - 10 meters
Delay TimeAdjustable, 2 seconds to 80 minutes
Operating Temperature-25°C to +85°C
Storage Temperature-40°C to +125°C
I/O Pins4 pins
Window Size4.2 x 5.2 mm

Frequently Asked Questions

What is the operating voltage range for the HM412 sensor?

The HM412 sensor is designed for low-voltage applications and operates strictly within a 2.7V to 3.3V DC range. Exceeding 3.3V may damage the internal DSP circuitry. It features excellent power supply rejection for stable operation even with slight fluctuations in this range.

How do I adjust the detection delay time?

The delay time is adjustable from 2 seconds up to 80 minutes. The specific adjustment method (typically via an onboard potentiometer or external resistor) is defined by the sensor's internal circuitry. Refer to the manufacturer's datasheet for the precise configuration method to set your desired activation period after motion is detected.

What type of output signal does this PIR sensor provide?

It provides a Schmitt trigger REL (relay) output. This means it outputs a clean, debounced digital signal suitable for directly driving a relay coil or interfacing with a microcontroller's digital input pin without additional signal conditioning, ensuring reliable switching in the presence of electrical noise.

Can this sensor be used outdoors?

While its operating temperature range (-25°C to +85°C) is wide, the HM412 module as supplied is typically a bare PCB. For outdoor use, it requires a protective, weatherproof enclosure that does not obstruct the IR-sensitive window. The sensor itself is not rated for a specific IP code against water and dust ingress.

Package Includes

  • 1 x Senba HM412 Digital PIR Sensor Module

Additional Information

Weight 0.01 kg
Dimensions 9 × 7 × 1 cm