SensMax D3 Wireless People Counting Sensor

SensMax D3 is a wireless bidirectional people counting sensor designed to measure how many people enter and exit through doors, gates, and passage points. It is a compact, battery-powered people-counting device that installs without cables and sends counting data online through a wireless gateway.

The sensor is used for footfall counting, entrance traffic measurement in shops, offices, public buildings, libraries, and other indoor locations. It detects movement direction and provides separate IN and OUT counts, which help analyze visitor flow and space usage.

People Counting Technology

The SensMax D3 sensor uses multi-beam infrared people counting technology. Three synchronized IR beams detect crossing patterns and determine direction of movement.

D3 counts people anonymously — no cameras, no filming, and no personal data are collected. This makes it suitable for privacy-sensitive environments where GDPR-compliant people counting is required.

SensMax D3 wireless people counting sensors installed in a museum to collect visitor statistics.

How It Works

The D3 uses three invisible infrared beams to detect movement through an entrance and determine whether a person is entering or exiting. Data is stored inside the sensor and sent automatically every 20 minutes to a SensMax gateway, which forwards it either to the SensMax Cloud, a local server, or third-party reporting tools. With accuracy of up to 99%, the system provides consistent, reliable results even during busy hours.

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Installation

SensMax D3 is installed directly at a doorway or passage using two units placed on opposite sides of the opening. The setup does not require cabling or external power wiring.

• Fix the sensor modules on both sides of the passage using mounting tape or brackets
• Position the units facing each other across the walking path
• Align the infrared beam line at the required height
• Insert standard AA batteries into the sensor
• Register the device in the SMX gateway for data transfer

After pairing with the gateway, the sensor starts recording crossings and sending data automatically according to the reporting interval.

SensMax D3 bidirectional people counters installed in a gym.

Technical Advantages

• Directional detection — bidirectional algorithm distinguishes incoming and outgoing visitors.
• Wireless setup — cable-free installation finished in minutes for rapid rollouts.
• Periodic cloud updates — data uploads automatically (~every 20 minutes) to SensMax Cloud, local servers, or third-party reporting tools.
• On-device backup — internal memory safeguards statistics during temporary connectivity outages.
• Advanced reporting — configurable dashboards and occupancy monitoring in the online portal.

Architecture of the people counting system. Data flow visualization from a people counting sensor to cloud reporting portal.

Real-World Applications

• Retail stores — evaluate conversion rates by comparing visitor traffic with sales, adjust staff schedules during peak hours, and analyze campaign impact on customer flow.
• Libraries & museums — measure attendance for cultural events, optimize opening hours, and secure funding with reliable visitor statistics.
• Fitness clubs & gyms — identify busy times to improve equipment availability and schedule group classes effectively.
• Corporate offices — monitor occupancy in meeting rooms and shared spaces, improving resource allocation and safety compliance.
• Public buildings — plan cleaning services, manage security staffing, and better understand community facility usage.

SensMax D3 wireless bidirectional people counting sensor for retail stores.

Benefits for Business

By tracking real visitor traffic, managers can adapt staffing to peak times, optimize layouts, and measure the impact of marketing campaigns. Occupancy monitoring supports safety compliance, while the wireless design reduces installation costs and accelerates rollouts across multiple locations—delivering a faster return on investment.

Example in Practice

A retail chain in Central Europe installed SensMax D3 counters across 50 stores and discovered a consistent pre-lunch traffic peak that had gone unnoticed before. By analyzing the hourly visitor flow, managers clearly saw that between 11:00 and 13:00 customer numbers increased significantly compared to the rest of the day. After adjusting staff shifts to cover this high-demand period, the stores reduced waiting times at checkouts, improved service speed, and increased conversions during those hours by 12%. The data also helped the chain justify allocating additional staff in busier locations, thereby improving both customer satisfaction and overall sales efficiency.

Models & Range Options

• Pro D3 — up to 50 m communication range.
• D3 LR — up to 250 m range.
• D3 SLR — up to 1000 m range.

FAQ – SensMax D3 People Counting Sensor

• What is a bidirectional people counting sensor?
  A bidirectional people counter detects movement direction and counts how many people enter and exit separately through a doorway or passage.
• Does the SensMax D3 use a camera?
  No. The D3 uses infrared beams only. It does not record images or video and works as an anonymous people counting sensor.
• Is the counting GDPR compliant?
  Yes. The sensor performs anonymous counting without collecting personal data, images or biometric information.
• How is the D3 sensor installed?
  It is mounted near a doorway using adhesive tape or a small bracket and aligned across the passage. No cabling is required.
• What is the battery life?
  Typical battery life is up to one year with standard AA batteries, depending on traffic level.
• Can it work without internet?
  Yes. The sensor stores data internally and sends it through a SensMax gateway when connectivity is available.
• What entrance width can it cover?
  Optimal passage width is 1–5 meters, with maximum up to 9 meters depending on setup.
• Where is the D3 typically used?
  It is commonly used at retail entrances, office doors, libraries, museums, gyms and public buildings.

Get Started

Want accurate visitor flow data without complex installation? Request a demo or quote for the SensMax D3 Wireless People Counter today.

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