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  • Industrial Grade Wireless Frequency Meter
  • 24-bit Frequency pre-processed output in milli Hz
  • Frequency Range 2 Hz to 10k Hz
  • Internal processor Frequency Resolution
    • 2     to 12       Hz : 0.0004 Hz
    • 12   to 100     Hz :   0.002 Hz
    • 100 to 10000 Hz :     0.25 Hz
  • Max Frequency Error ±1 %
  • 16-bit Duty Cycle pre-processed output rounded to 2 decimal places
  • Duty Cycle Range 10% to 90%
  • Internal processor Duty Cycle Resolution
    • 2     to 100      Hz : 0.02 %
    • 100 to 10000 Hz :  0.25 %
  • Max Duty Cycle Error 0.02 to 0.25%
  • Auto Time Delay based transmission
  • Frequency and duty cycle change detection transmission
  • Configurable frequency and duty cycle change detection bounds
  • 2 Mile Range with On-Board Antenna
  • Superior LOS Range of up to 28 miles with High-Gain Antennas
  • 256 Sensor Node per Network
  • Open Communication Protocol for custom interfacing applications
  • Improved reliability incorporating Retry in case of packet loss


SKU: PR52-14 UPC: Category:


IoT Long Range Wireless Pulse/Frequency Meter Sensor

Introducing NCD’s Long Range IoT Wireless Pulse/Frequency Meter, boasting up to a 28 Mile range using a wireless mesh networking architecture. It samples frequency and duty cycle and internally adjusts its time base to maximize output resolution and minimize error. However, the above complexities are abstracted from the user and the output comes out pre-processed. This process is repeated at user defined intervals while sleeping in between to minimize power consumption.

This IoT Wireless Pulse/Frequency Meter has an additional feature of detecting change in frequency and duty cycle at user defined detection time intervals and sending out data if the change is greater than user defined detection change percentage. This change detection feature can be enabled/disabled by the user and works for both frequency and duty cycle against a single change percentage and detection time configuration. To minimize power consumption, the sensor sleeps during the time it is not detecting a change. Both of these features work in parallel to support multiple application areas in one package.

Powered by just 2 AA batteries and an operational lifetime of 500,000 wireless transmissions, a 10 years 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 providing maximum configurability depending on the intended application.

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

We opened the communications protocol so you can integrate wireless transmitters with just about any control system or gateway you could ever imagine.  Send data to a PC, a Raspberry Pi, to Microsoft Azure® IoT, or Arduino.  Your data belongs to YOU and it’s up to you to decide where you want the data to arrive.  Don’t be bogged down by the limitations of proprietary cloud solutions, post the data where you need it most.  Speaking of Communications, NCD long range IoT Wireless Pulse/Frequency Meter sensors use the DigiMesh® protocol from  DigiMesh® was designed by The industrial leader in secure wireless communications for industrial applications.  DigiMesh® automatically hops data from gateway to gateway until it arrives at the desired destination.

Note: By default the change detection feature is disabled to save the battery life.

Receiving Data From IoT Wireless Pulse/Frequency Meter Sensor

This device sends data periodically, based on user-preset timing intervals and on state change of the contact closure inputs. 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 wireless transmitter 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 that 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. 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.

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!

IoT Wireless Pulse/Frequency Meter


  1. Wireless Frequency Monitoring
  2. Wireless Pulse Width Measurement
  3. Flow Meter Monitoring
  4. Tachometer Interface
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.


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

Wiring Diagrams

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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: PR52-14
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.


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

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