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  • Industrial Grade Sensor with 3-axis Accelerometer for Activity Detection
  • Configurable Activity Detection Parameters
  • Uses Interrupts for Activity detection with little power consumption
  • Configurable Acceleration Range ±2g to ±16g
  • Configurable Interrupt Threshold ±16mg to ±15.3g
  • Configurable Data Rate 1Hz to 5.37KHz
  • Configurable Interrupt Duration 200us to 1sec
  • Customizable Interrupt Types and Combinations for generating Activity condition
  • Configurable In-built Interrupt disable time for maximizing battery life time (sends a packet after this interval to show activity detection enabled)
  • Superior LOS Range of up to 28 miles with High-Gain Antennas
  • Interface to Raspberry Pi, Microsoft Azure, Arduino and More
  • Example Software for Visual Studio and LabVIEW
  • Wireless Mesh Networking using DigiMesh®
  • Operating Temperature Range -40 to +85 °C
  • 256 Sensor Nodes per Network
  • Open Communication Protocol for custom interfacing applications
  • IP65 Rated Enclosure
  • Small Form Factor Wireless Sensor (4.3×3.3 inch)
  • Power efficient Built-in Sleep mode
  • User Configurable Sleep duration
  • Up to 300,000 Transmissions from 4 AA Batteries
  • Improved reliability incorporating Retry feature in case of packet loss
  • Real time battery status


SKU: PR52-33J UPC: 689860069954 Categories: , , ,


Industrial Wireless Activity Detector

Our long range wireless enterprise series sensors are an easy to use and reliable start to any data aggregation application. This video will demonstrate how they work, what they do, and how to use them.

Industrial Wireless Activity Detector

Introducing NCD’s Industrial Wireless Activity Detector, boasting up to a 28 Mile range using a wireless mesh networking architecture. It incorporates a high accuracy acceleration sensor for measuring acceleration changes. Utilizing the interrupt feature of this sensor, it is able to minimize power consumption by making most of the components go to sleep while waiting for the interrupt from the sensor.

User can configure the Activity Detection condition (interrupt settings) using the configuration mode. User can configure acceleration range, data rate, interrupt duration and interrupt threshold. Interrupt duration is dependent upon data rate. It is the duration for which an interrupt condition has to hold to generate a system interrupt and initiate data transmission to a nearby receiver. Interrupt threshold is dependent upon acceleration range and it is the acceleration in g which if exceeded causes interrupt to fire. Note that the absolute value of actual g reading is compared with it therefore it works for both positive and negative acceleration exceeding threshold.

User can also setup interrupt settings. Interrupt settings also user to setup whether an acceleration above or below threshold will fire interrupt. This can be configured separately for all the axis. Moreover, the user can setup OR/AND gates between the interrupts. This allows activity detection (system interrupt) if any single axis interrupt fires (OR condition) or if all axis interrupts fire (AND condition). User can also configure a delay time in seconds which disables the interrupt for that amount of time after a successful interrupt. This enables a user to make sure that the sensor does not drain its battery (with continuous transmissions) if an interrupt condition persists or a wrong condition is accidentally programmed. This time is also used to send a periodic packet to a receiver with latest available data.

Powered by just 4 AA batteries and an operational lifetime of 300,000 wireless transmissions, a 10 year battery life can be expected depending on environmental conditions and the data transmission interval.  Optionally, this sensor may be externally powered.

With an open communication protocol, this sensor can be integrated with just about any control system or gateway.  Data can be transmitted to a PC, a Raspberry Pi, to Microsoft Azure® IoT, or Arduino. Sensor parameters and wireless transmission settings can be changed on the go using the open communication protocol which provides maximum configurability depending on the intended application.

The long range, price, accuracy, battery life and security features of Wireless Activity Detector makes it an affordable choice which exceeds the requirements for most of the industrial as well as consumer market applications.

NOTE: The current version of this sensor does not support the inbuilt temperature sensor.

Receiving Data From Industrial Wireless Activity Detector

This Industrial Wireless Activity Detector device sends data periodically, based on user-preset timing intervals. Data transmissions include battery level, signal strength, payload, firmware version, sensor type, and device serial number.  Please see the Resources section to see detailed information on the data structure of this device. This Industrial Wireless Vibration Temperature Sensor is a wireless transmitter that needs a receiver.  There are many options available for receiving data from NCD transmitters. We highly recommend using our USB Modem (available during purchase) so you can monitor this device and use our LabVIEW software for changing device settings. Using our long-range USB wireless modem, users can expect easy operation over a virtual COM port at 115.2K baud.  Optionally, we offer a Wireless receiver that operates over Ethernet.  Data from NCD sensors will appear over TCP/IP on port 2101.  Simply open a TCP/IP socket, port 2101, to the IP address of the Ethernet modem and see your data stream in to your local area network.

Now Supporting Microsoft Azure® IoT

We’ve been working with Microsoft engineers to post data from our sensors to Azure®.  If you need help integrating this sensor into Azure®, please let us know and we will work with you to get you connected!

Azure IoT Wireless Activity Detector

We take software samples seriously!  Be sure to to check out the resources section of our web site to see code samples for Raspberry Pi, Visual Studio, LabVIEW, Arduino, Python, and more.  We can help you post data to your Azure IoT account with some of our tutorials!


  1. Wireless Industrial Tools Monitoring
  2. Machine on/off state detection
  3. Machine Activity Detection
  4. IoT Security Applications
  5. Wireless Activity Monitoring For AWS/Azure
802.15.4 Module Wireless

900HP-S3B Industrial Wireless Mesh

Long-Range Wireless Mesh networking is our favorite of all wireless communication technologies.  This is the ONLY communications technology NCD recommends on the factory floor, operating at a safe 900MHz.  Mesh technology will hop data from one location to another to reach its intended destination, users do not need to do anything other than make sure wireless modules stay within hopping range of each other.  We use the Digi 900HP-S3B module in our products, as this is the best the industry has to offer.  With a 2 mile range between modules and up to 8 hops, it is possible to cover 16 miles of wireless territory using this technology.  Using high-gain antennas, this module is capable of communicating to a remote module up to 28 miles away.


Not for use in outdoor applications or for use in excessive temperature conditions.  Prolonged freezing will prevent batteries from functioning until thawed, using extended temperature range industrial batteries may improve the useful temperature range.  Extended freezing applications should use a full-time powered solution.  Prolonged exposure to extreme humidity conditions may damage this device.  The sensing element is rated for use for 5 years and may be replaced.  Exposure to high temperatures may cause the batteries to leak, causing permanent damage to this device.  NCD Warranty does not cover battery corrosion or use in excessively smoky environments under any circumstances.

900HP-S3B Wireless Compatibility Notes

When using an 900HP-S3B communication module, it is essential that you use the ZIGMO_PCB to configure the module settings.  Long-Range wireless sensors may be programmed over the air without removing the communications module.

A 900HP-S3B Modem or a gateway of some kind that support the 900HP-S3B communications module will also be required.



Mechanical Drawing

Wireless Sensor Enclosure

Sensor Probe Dimensions

Wireless Sensor Probe

Wiring Diagrams

Click to Enlarge
Click to Enlarge

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Standard Lead Times

Standard lead times are 3-5 business days as we manufacture and test the product at the time of order. Larger orders may require additional time.
Product Identification
SKU: PR52-33J
UPC: 689860069954
Country of Origin: US
HTS Code: 854231
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900HP-S3B Long Range Wireless ModemChange

You will need at least one 900HP-S3B Modem to talk to our complete line of 900HP-S3B Wireless Mesh devices.

Antenna Extension CablesChange

Do you need to extend the Antenna? Use Any of these Antenna Extension Cables:


We Customize Just for You!!

NCD offers many custom IoT electronic design services to help tailor our product to your exact needs.  Whether you are looking for custom firmware, circuit board modifications, metal enclosures, or industrial color printing, we can help you with a wide variety of design services.

Custom IoT Electronic Design Services Process

Most of our users purchase off-the-shelf hardware for initial testing.  Once everything is working, they contact us to build a custom solution which may include specialized changes to the board, firmware, connectors, etc.  Custom boards have many advantages such as reduced wiring, easy installation, small size, less power consumption, and in some cases, an overall reduction in product cost.  Custom IoT Electronic Design Services will have your company name and logo on the board as well as the enclosure.

Customized IoT Electronics

NCD engineers can help build a customized solution for your particular application based on the designs you see on our website.  We can combine devices onto a single board, change the shape, or even some of the components to meet your exact needs.  We also provide turn-key metal enclosures with powder coating and full-color printing on the top side starting at just $500 for setup!  We have more than 20 years of experience in electronics design and manufacturing.  All of our products are designed and manufactured in the USA, so we are here to support the products we make.  We only ask that our customers prototype their needs using our existing products before we customize.

Customization Guidelines

  • Custom designs should be based on our existing product because we can’t build rockets or electric cars over here!
  • We do not provide customization services if it involves the introduction of a new or untested technology.
  • Custom engineering fees depend on your requirements, so please contact us for a quote!
  • We maintain ownership of all designs, including our customized designs as they are based on our existing Design.
  • We will only ship the customized product to you or your authorized agents.
  • We have an NDA available if needed.
  • The turn-around time is about 2-3 weeks.
  • We specialize in low-volume designs, no quantity is too small!
  • We have the ability to scale to large volumes as needed.

Getting Started with Product Customization

All you have to do is contact us and we will walk you through the process from beginning to end, based on your individual needs.  Some people are surprised at how fast we finish CAD design (usually a few hours), but keep in mind, we still have to build your design, which takes considerably more time.  When we customize product, here are the general services we provide:

  • We design the circuit board.
  • We communicate with our customers throughout the customization and manufacturing process.
  • We manufacture surface mount stencils and circuit boards.
  • We program our pick and place machines to build your boards.
  • We build a working sample and run it through our wave solder machine.
  • We test your custom IoT solution.
  • Once the design is finalized it won’t be possible to make changes during production (changes cost money and require us to repeat the above processes)
  • Once it meets all your requirements, we will start production as needed.
  • We work with our metal fabricators to design a metal enclosure if required.
  • You work with our artist to print the top side of the enclosure in full color with your company logo if required. and ControlEverything Site Migration Notes

©2018 National Control Devices, LLC

Made in the USA
5 Year Warranty
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To learn something new, take the path that you took yesterday. ~John Burroughs

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