Wireless Indoor Motion Sensor for 4000 Series Alerts
The Dakota Alert PIR-4000 is a battery-powered passive infrared motion sensor designed to work with Dakota Alert 4000 Series receivers to detect people moving through a protected area. When the PIR-4000 sees motion, it transmits a wireless signal to a paired receiver, which can sound a chime, trigger a relay, or generate a smart notification depending on the receiver model.
This compact motion detector is intended for indoor entrance alerts, interior hallway monitoring, and similar people-detection applications where running low-voltage wiring is not practical. Because it is compatible with all Dakota Alert 4000 Series receivers, it can be added to existing 4000 Series driveway or perimeter systems to extend coverage into interior spaces.
How the PIR-4000 Detects People
The PIR-4000 uses passive infrared (PIR) technology to monitor a defined area for people walking through its field of view. Inside the sensor, a pyroelectric element and multi-zone lens detect changes in infrared energy caused by a person’s body heat moving across the coverage pattern. When the sensor detects motion, the transmitter sends a wireless signal to the receiver to generate an entrance or movement alert.
Because it responds to changes in heat rather than static conditions, the PIR-4000 is suited for applications where people periodically walk through an area, such as doorways and corridors. The detection pattern is optimized for walking motion across the sensor’s field of view, so placement and aiming are important for consistent performance.
- Detection method: passive infrared sensing of body heat movement.
- Typical targets: people walking through entrances, aisles, and hallways.
- Alert path: sensor sends a wireless signal to a Dakota Alert 4000 Series receiver when motion is detected.
Entrance Alert and Interior Monitoring Applications
The PIR-4000 is designed for indoor applications where staff or occupants need a reliable indication that someone has entered or moved through a monitored space. It can be used as an entrance alert sensor near interior doors, as a hallway motion sensor for traffic monitoring, or as part of a simple customer alert system in retail stores.
When paired with a compatible receiver, the PIR-4000 can trigger chime tones, visual indicators, or, when used with a smart receiver, smartphone notifications. This flexible behavior allows the same sensor hardware to support a range of use cases, from backroom entrance alerts to basic interior security notifications.
- Retail use: customer entrance alerts at interior doors or aisles.
- Office use: monitoring hallways, lobbies, and staff-only doors.
- Light commercial: backroom and stockroom entries, interior service areas.
Compact, Battery-Powered Design
The PIR-4000 is a small, battery-operated device, making it suitable for installations where a discreet appearance and quick mounting are priorities. The compact housing can be placed near ceilings, on walls, or in corners so that it has a clear view of the monitored area without becoming a focal point in the room.
The sensor is powered by a lithium battery (such as a CR-123A), which supports long-term operation without external power wiring. This simplifies retrofit projects in existing buildings, as there is no need to open walls or run new cables; the installer can mount the sensor bracket, attach the housing, and pair the transmitter with the receiver.
- Power source: lithium battery for cordless operation.
- Mounting options: wall, corner, or near-ceiling placement depending on coverage needs.
- Form factor: compact housing suited for interior spaces.
Wireless Link to Dakota Alert 4000 Series Receivers
The PIR-4000 is compatible with all Dakota Alert 4000 Series receivers, including standard chime receivers and smart receivers that support app-based notifications. When motion is detected, the transmitter uses the 4000 Series wireless link to send an alert to the receiver, which then performs the programmed response such as playing a tone or activating an output.
Because the PIR-4000 uses the same wireless platform as other 4000 Series devices, it can be one of several transmitters in a multi-zone system. Installers can assign different tones or indicators at the receiver for each transmitter, allowing users to distinguish between interior motion, driveway activity, and other events based on which zone is activated.
- Compatibility: works with Dakota Alert 4000 Series receivers.
- Multi-zone systems: can share a receiver with driveway and perimeter sensors.
- Alert differentiation: receivers can use distinct tones for different transmitters.
Indoor and Sheltered Use Considerations
The PIR-4000 is designed for indoor applications and for certain outdoor applications when it is properly protected and installed within specified environmental limits. For interior use, the sensor should be installed where temperature and lighting are reasonably stable, avoiding direct aim at sources of rapid heat changes such as HVAC vents or direct sunlight.
Standard PIR placement guidance suggests positioning the sensor so that people move across the field of view rather than directly toward or away from the detector. The monitored area should be free of obvious obstructions that could block the sensor’s line of sight, and potential sources of nuisance motion like hanging signs or moving curtains should be minimized.
- Primary environment: indoor spaces such as entries, halls, and rooms.
- Line of sight: ensure clear view of the walking path.
- Environmental factors: avoid direct airflow and rapidly changing heat sources.
Role in a Dakota Alert System
In a complete Dakota Alert system, the PIR-4000 acts as the motion-sensing front end for entrance alerts and interior monitoring. When the sensor is triggered, the paired receiver provides the user-facing alert, which might be a chime tone, a visual indicator, a smartphone notification, or a relay closure depending on the receiver model and configuration.
This architecture allows the PIR-4000 to be used in installations that do not require a full alarm panel but still benefit from a clear indication of interior movement. For properties already using Dakota Alert 4000 Series driveway alarms, adding a PIR-4000 provides a way to extend coverage from exterior approaches into interior entrances while retaining a common receiving platform.
- System role: motion sensor feeding alerts to 4000 Series receivers.
- Alert types: chime tones, indicators, smartphone notifications, or relay outputs depending on receiver.
- Expansion path: combine with driveway, beam, or other sensors under a single receiver.
Key Features of the Dakota Alert PIR-4000
- Wireless indoor motion sensor compatible with all Dakota Alert 4000 Series receivers.
- Passive infrared detection for people walking through entrances, aisles, and hallways.
- Battery-powered design for easy installation without running power wires.
- Compact housing suitable for discreet mounting in interior spaces.
- Multi-zone support when used alongside other 4000 Series transmitters on a shared receiver.
PIR-4000 Motion Sensor Specifications
- Power source: CR-123A lithium battery (included)
- Product size: 3.25″ H x 2″ W x 1.5″ D
- Motion detection range: up to approximately 40 feet
- Operating temperature: -10° F to 120° F
- Wireless range: up to 1 mile line-of-sight (actual range varies by terrain and obstructions)
- Operating frequency: 433 MHz
