UltimateSensor Mini


Discover the new UltimateSensor Mini: your compact solution for smart home automation. Despite its small size, the Mini retains the powerful functionality of the original UltimateSensor, excluding the OLED screen and Ethernet connection. Instead, it introduces a built-in speaker and microphone, perfect for seamless Home Assistant voice solutions. Want to know more? Visit the UltimateSensor Mini product page.


Ultimate Smart Sensor: All-in-One - Measuring What Matters in Home Assistant for a Healthier Living Environment

Discover the UltimateSensor, your premium all-in-one solution for measuring and monitoring the indoor environment in your home. This advanced sensor provides real-time measurements of CO2 levels, humidity, temperature, lux (light intensity), volatile organic compounds (VOC), motion using PIR and mmWave sensors, and not to forget, fine dust levels. With Ethernet connectivity and PoE support, you can seamlessly integrate the UltimateSensor into your Home Assistant ecosystem for a healthier and smarter home.

Made for

Discover the UltimateSensor: A meticulously crafted Dutch creation, fully developed and designed to meet your needs.

Specially designed for Home Assistant & ESPHome: The UltimateSensor is specially designed to seamlessly integrate with Home Assistant & ESPHome.

The All-in-One Measurement Solution for Your Smart Home

With the UltimateSensor, you're ready for a comprehensive insight into your living environment in one go. This powerful sensor measures real-time CO2 levels, humidity, temperature, lux (light intensity), volatile organic compounds (VOC), and motion with the built-in PIR sensor. You can start right away with the standard version of the sensor, which already offers impressive capabilities.

But it doesn't stop there. What truly makes the UltimateSensor unique is its modular design. Do you want to add the mmWave sensor for even more precise motion detection? Or are you interested in measuring fine dust levels with the PM Fine Dust Meter? No problem. You can purchase these modules separately at any time and easily snap them into the UltimateSensor. This keeps your measurement solution flexible and tailored to your needs, ensuring you always have ultimate control over your living environment.


Your Comprehensive Monitoring Solution

Explore the versatile capabilities of the UltimateSensor, designed to provide a comprehensive overview of your living environment. From air quality to motion detection, every sensor function contributes to a healthier and smarter home.

CO2 sensor
Temperature Sensor
Humidity Sensor
Lux Sensor (Light Intensity)
VOC Sensor
NOx Sensor
Particulate Matter Sensor (PM)
mmWave Sensor
PIR Sensor
OLED Display

Live Tracking: Up to 3 People with mmWave & PIR

The UltimateSensor elevates motion detection to a new level by combining the powers of mmWave and PIR technologies. The mmWave sensor offers advanced detection of movement, position, and the number of people in a space. This enables not just the detection of presence but also accurately mapping the location and movement patterns of individuals.

Additionally, the PIR sensor ensures reliable detection of movements within direct line of sight, up to 12 meters away, adding an extra layer of precision and security to your smart home system.

Versatile Connectivity & Power Options

The UltimateSensor offers a range of connectivity and power options to seamlessly align with your preferences. Opt for reliable wired connections with Ethernet and Power over Ethernet (PoE) support, or choose flexibility with Wi-Fi connectivity. For power, you can use the included USB-C cable and adapter, making installation and integration into any part of your home a breeze. This ensures constant monitoring, regardless of your setup.

WiFi + USB-C
Ethernet (PoE)

Designed for Wall Mounting and Freestanding Placement

The UltimateSensor now offers even more flexibility with a temporarily free included wall bracket, making wall mounting a breeze. Prefer to place the sensor freestanding? No problem. The sensor is designed to also function independently, perfect for placement on any surface in your home.


Live Smart,
Live Safe,
Live Healthy

Breathe Cleaner: CO2 Levels Under Control

The CO2 sensor in the UltimateSensor continuously monitors the CO2 levels in the air. This is crucial for a healthy living environment. When CO2 levels get too high, it can lead to fatigue, headaches, and reduced concentration. With the UltimateSensor, you can easily set up notifications to know when it's time to open a window for fresh air.

Breathe Easier: VOC Measurement for Air Quality

The VOC sensor detects volatile organic compounds in the air, which can come from cleaning products, paint, and other sources. Too many VOCs can negatively affect air quality and cause respiratory problems. The UltimateSensor provides real-time information about VOC levels so you can improve the air quality in your home.

Optimal Humidity for Comfort and Health

The humidity sensor measures the moisture level in your home. Adequate humidity is essential for comfort and health. Dry air can lead to respiratory irritation and an increased risk of infections. With the UltimateSensor, you can closely monitor and adjust humidity for a healthier living environment.

Optimal Temperature for Well-being

A consistent and optimal room temperature is important for your well-being. The temperature sensor in the UltimateSensor ensures you're always comfortable. It helps you know when it's time to turn on the heating or open a window for cooling.

Clean Air for a Healthier Life

The fine dust sensor in the UltimateSensor measures the concentration of small particles in the air that can be harmful to health. It provides valuable information about air quality and can help reduce exposure to potentially dangerous substances.

Safety and Comfort with Motion Detection

The UltimateSensor is equipped with PIR and mmWave motion sensors, which means it not only detects motion but can also distinguish the type of motion. This is not only convenient for energy savings through automatic lighting but also for your safety. If unusual movements are detected when you're not at home, you can receive immediate notifications.

Complete Control Over Your Living Environment with Smart Automations in Home Assistant

Our sensor seamlessly integrates with Home Assistant and provides you with real-time insights into all these measurements.

What truly sets this sensor apart is the ability to set up smart automations. Imagine receiving a notification when CO2 levels become too high, and the UltimateSensor advises opening a window for fresh air. Or being alerted when fine dust or VOC levels exceed safe limits. With the UltimateSensor, you can maintain control over your living environment and take immediate action when needed.

With the UltimateSensor, you're the master of your living space. Discover a smarter way to manage your home and ensure a healthier and more comfortable living environment.

Home Assistant App

Prepared for Anything. The UltimateSensor Base and its expandable modules are ready for the challenge. Discover the components of the UltimateSensor today.

UltimateSensor Basic.
Included in the Standard Package:

12m PIR Motion Sensor

Precisely monitor motion up to 12 meters away thanks to the advanced Panasonic PIR sensor.

Light Sensor Module

The BH1750 Lux Light Sensor Module provides accurate measurements of light intensity, giving you a clear insight into ambient lighting.

Air Quality Sensor VOC and NOx Values

With the SGP40 Air Quality Sensor, you can measure VOC and NOx values, gaining insight into the air quality around you and the possible presence of pollutants.

CO2, Temperature, and Humidity

The SCD41 sensor provides accurate measurements of CO2 levels, temperature, and humidity, allowing you to monitor the air quality in your environment and ensure you always stay in a comfortable and healthy space.

Information Display

With the bright and sharp SSD1306 OLED display of the UltimateSensor, you have instant access to all your sensor data and can view important information about your living environment at a glance.

Adjustable LED Notification

Thanks to the built-in WS2811 LED in the UltimateSensor, you can add visual signals to your smart system. Customize the LED color to indicate important notifications or events in your living environment.

MMWave Motion Sensor

The DFRobot 24GHz mmWave sensor in the UltimateSensor accurately detects movements up to 9 meters away, even when you're still. This is one of the best mmWave sensors on the market and is a great addition to the PIR sensor.

Fine Particle Matter Meter (Optional)

The Sensirion SPS30 fine particle matter meter measures particle concentration in µg/m³ and the size of the measured particles, including PM1, PM2.5, PM4, and PM10. From the perspective of air pollution, it's essential to distinguish PM1. The smallest particles enter our bloodstream most easily, while larger particles (especially those above 2.5 µm and closer to 10 µm) are captured by our respiratory system. This sensor also has a self-cleaning mechanism built in.

Frequently Asked Questions

What exactly does the UltimateSensor measure?

The UltimateSensor monitors a wide range of data to accurately watch over your living environment. This includes:

-Motion Sensor: PIR sensor detects movement up to 12 meters away.
-Light Sensor Module: Provides accurate measurements of light intensity.
-Air Quality Sensor: Measures VOC and NOx values for insights into air quality.
-Optional modules include:

-MMWave Motion Sensor: Detects movements, the number of people, and up to 3 zones with precision.
-Particulate Matter Sensor: Measures the concentration of particles in µg/m³, including PM1, PM2.5, PM4, and PM10.

In short, the UltimateSensor offers comprehensive data for thorough monitoring of your living environment.

How do I integrate the UltimateSensor with Home Assistant?

The UltimateSensor can easily be integrated with Home Assistant via WiFi, Ethernet connection, and Power over Ethernet (PoE) support.

Does the UltimateSensor have a display to show data directly?

Yes, the UltimateSensor is equipped with a display that allows you to view real-time data.

Can I use the UltimateSensor outdoors?

No, the UltimateSensor is designed for indoor use and is not suitable for outdoor applications.

Can I expand the UltimateSensor with additional modules myself?

Yes, the UltimateSensor is modularly designed. You can upgrade and easily replace optional modules, such as the MMWave Motion Sensor and Particulate Matter Sensor, in your UltimateSensor for added functionality at any time.

What is the power supply for the UltimateSensor?

The UltimateSensor can be powered through standard power sources, such as a wall outlet or Power over Ethernet (PoE).

Does the UltimateSensor have a built-in LED, and what can I use it for?

Yes, the UltimateSensor is equipped with a built-in WS2811 LED. This LED can be customized to display various colors and serves as a visual indicator for notifications or events in your environment. You can program the LED, for example, to flash red when CO2 levels are too high or to glow green when air quality is optimal.

What does it mean that the UltimateSensor is self-calibrating, and why is this important for its use?

The UltimateSensor is designed with self-calibrating components and sensors. This means that all built-in sensors, including the CO2 sensor, particulate matter sensor, and others, automatically perform periodic calibrations to ensure the accuracy and reliability of measurements. Self-calibration minimizes the need for manual settings and adjustments, making the UltimateSensor user-friendly. It ensures that the sensor always delivers optimal performance, whether monitoring air quality, detecting movements, or conducting other measurements.

Technical Specifications

Network Connection
Wi-Fi IEEE 802.11 b/g/n (2.4 GHz), supports WPA/WPA2 security.
Ethernet (RJ45) with PoE support for a stable and direct network connection.
Measures CO2, temperature, humidity, light intensity (lux), VOCs (Volatile Organic Compounds), and particulate matter levels (PM1, PM2.5, PM4, PM10). Equipped with mmWave radar for motion detection, person count, and space occupancy.
Detection Distance
mmWave up to 8 meters, PIR sensor up to 12 meters.
Temperature Measurement
From 0 °C to +50 °C with an accuracy of ±0.5 °C.
OLED screen for direct display of measurement data.
Cable Length
USB-C power cable of 3 meters.
Power Supply
Through the provided USB power adapter or PoE (Power over Ethernet).
Operational Classification
IP20 (suitable for indoor use).
165 x 59 x 48 mm
Fully integrated with Home Assistant, including support for firmware updates via OTA (Over The Air).
Mounting Options
Can be installed both free-standing and with a provided wall bracket.
Additional Features
LED indicator for visual signals and alerts, programmable via Home Assistant. Functions as a Bluetooth Low Energy (BLE) proxy for Home Assistant, allowing nearby BLE devices to connect and be monitored through the sensor.