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FieldSENSE – A Brief History

fieldSENSE60 Personal RF Monitor – Overview

fieldSENSE 2.0 Personal RF Monitor – Overview

FieldSENSE – A Brief History

FieldSENSE – A Brief History

fieldSENSE60 Personal RF Monitor – Overview

fieldSENSE60 Personal RF Monitor – Overview

fieldSENSE 2.0 Personal RF Monitor – Overview

fieldSENSE 2.0 Personal RF Monitor – Overview

FieldSENSE – A Brief History Transcript

Introducing fieldSENSE: A Proven Evolution in Personal RF Safety

The fieldSENSE personal RF safety monitor has evolved significantly over three generations, establishing a strong reputation for reliability, innovation, and performance in electromagnetic field (EMF) monitoring.

Generation 1: fieldSENSE 1.0

It supported frequency measurements from 380 MHz to 2.7 GHz, covering key occupational RF exposure bands.
This first generation featured a single-probe architecture, suitable for the frequencies and technologies in use at the time.

Generation 2: fieldSENSE 2.0

The frequency range was extended significantly, down to 50 MHz, ensuring broader compliance across VHF and UHF bands.
The architecture was upgraded from a single-probe to a 3x E-field and 3x H-field probe array, allowing for more accurate field vector measurements and improved spatial averaging.

At the time of its development, frequencies above 6 GHz were primarily limited to point-to-point communication systems, making fieldSENSE 2.0 more than sufficient for most environments.

Generation 3: fieldSENSE 60 – Designed for 5G

Frequencies above 6 GHz are no longer exclusive to point-to-point links; they are now widely deployed in 5G broadcast networks.
Responding to this shift, the fieldSENSE 60 was engineered to provide full compliance monitoring from 50 MHz up to 60 GHz.

This latest version features a completely redesigned probe architecture, purpose-built to handle the challenges of ultra-high-frequency RF environments.

Engineered for Professionals:

Extremely robust
Weatherproof and field-ready
Built for demanding work conditions

It’s designed to work as hard as you do, offering professionals in telecom, broadcasting, and EMF safety unmatched performance and peace of mind.

fieldSENSE60 Personal RF Monitor Transcript

fieldSENSE60 Personal RF Monitor

Advanced RF Safety for Modern Networks

The fieldSENSE60 is a cutting-edge personal RF safety monitor with a proven track record of protecting professionals in high-exposure environments. Engineered for tower climbers and RF technicians, the fieldSENSE60 ensures you stay safe while working on site.

Expanded Frequency Range

From broadcast FM bands
All the way up to millimeter-wave 5G systems, reaching 60 GHz

This wide range ensures compliance and protection across legacy systems and modern high-frequency networks.

Real-Time Exposure Monitoring

Continuously assesses RF exposure levels
Issues immediate alerts if occupational safety limits are exceeded

This direct, real-time feedback allows workers to respond quickly and safely in any RF environment.

Designed for Climbers

Includes a secure harness-attachment system

Prevents accidental drops
Ensures the warning buzzer remains within hearing range at all times

Built to Withstand the Elements

Weather-resistant
Rugged and dependable
Designed to perform in the toughest outdoor environments

You can rely on the device to be there, protecting you through every shift.

Need More Info?

Continue watching our product overview videos
Or contact our team directly — we’re here to answer any questions you may have

fieldSENSE 2.0 Personal RF Monitor Transcript

fieldSENSE 2.0 Personal RF Monitor

Next-Generation RF Protection for Climbers

The fieldSENSE 2.0 is a next-generation personal RF safety monitor purpose-built to protect workers operating near broadcast and telecom antennas. It’s a significant leap forward from previous models, offering more accuracy, functionality, and ruggedness for professionals who work in RF-intensive environments.

Wide Frequency Coverage

50 MHz to 6 GHz, covering broadcast, VHF, UHF, cellular, and early 5G deployments
An upgrade from the original fieldSENSE model, which measured from 380 MHz to 2.7 GHz

This extended range ensures you are protected in both traditional and modern RF workspaces.

Dual-Field Measurement for Accurate Exposure Assessment

Simultaneously measures E-fields (electric) and H-fields (magnetic)
Accurately assesses total RF exposure regardless of your orientation or position

Smart Features for Real-World Use

Isotropic sensing: Measures exposure from all directions when worn on the body
Fall detection alarm: Alerts nearby climbers if a fall is detected
Drop assist: Built-in alarm helps locate the unit if it’s dropped
Voice notes: Record audio reminders like antenna serial numbers or field data
Data logging: Automatically records measurements for later analysis via USB using the free downloadable software

Durable and Reliable Design

Made from the same material as riot shields for extreme durability
Weather-resistant: Operates in outdoor environments
Powered by two AAA batteries for convenience
Comes with a protective storage case for safe transport

Easy Harness Integration

Uses a durable rubber strap, similar to a dive watch strap
Thread the strap through the two rear slots
Loop around your harness shoulder strap and tighten
Keeps the device stable and out of the way while climbing

Where to Buy

The fieldSENSE 2.0 is available from various trusted suppliers.

Instructional Videos

How to take voice notes

Software demonstration

How the fieldSENSE60 works

How the refurbishment program works

How to start using your fieldSENSE

How to use the harness attachments

How the built-in fall detection and alarm works

How to start using your fieldSENSE

How to start using your fieldSENSE

How the fieldSENSE60 works

How the fieldSENSE60 works

Software demonstration

Software demonstration

How the built-in fall detection and alarm works

How the built-in fall detection and alarm works

How to use the harness attachments

How to use the harness attachments

How to take voice notes

How to take voice notes

How the refurbishment program works

How the refurbishment program works

Turning the FieldSENSE personal RF monitor on and off is fast and glove-friendly. • To power on the device, simply press and hold the main button. The device activates immediately and begins logging RF exposure data without delay. • To power off, perform the same long press action. The device will shut down cleanly. This intuitive one-button control ensures ease of use, even when wearing protective gloves in the field.

Accurate RF exposure assessment requires the measurement of both the electric (E-field) and magnetic (H-field) components. This is crucial because, in many real-world scenarios—such as when working near FM radio or television broadcast antennas—you are operating in the near-field rather than the far-field region. In the near-field, the relationship between the E- and H-fields is complex and cannot be inferred from just one component. To ensure safety, international RF exposure guidelines – such as those from the FCC, ICNIRP, Safety Code 6, and the EU Directive 2013/35/EU mandate a shaped frequency response. This means they account for the human body’s increased absorption of RF radiation at lower frequencies compared to higher frequencies. The fieldSENSE60 is engineered to comply with these standards by: • Simultaneously measuring E- and H-fields across a wide frequency range, • Applying frequency-weighted (shaped) response curves in accordance with international guidelines, • Calculating the cumulative exposure from multiple RF sources in real time. For example, if you’re exposed to both an FM transmitter and a 5G antenna on the same rooftop, the device quantifies the percentage contribution from each source and provides a combined exposure level. This means you only need to evaluate one clear exposure value, making it easy to determine whether it is safe to work in the area based on the total exposure relative to established limits.

Once powered on, your FieldSENSE personal RF monitor begins logging your exposure environment automatically—with data captured at intervals as frequent as once per second. To access these exposure logs, including any recorded voice notes: 1. Connect the Device via USB: Use the USB port located at the base of the FieldSENSE device. Open the battery flap to access the port, then connect it to your PC using the provided USB cable. 2. Download and Install the Software: Visit www.fieldsense.com to download the FieldSENSE desktop application. Once installed, launch the app. 3. Automatic Time Synchronization: When connected, the software will automatically sync the device's internal clock with your local time zone, ensuring precise time stamps for all logged sessions. 4. Navigating the Interface: Each recorded session—whether it's an exposure log or a voice note will appear in the left-hand panel. Click on a session to view its contents. Use the graph icon to switch between electric field (E) and magnetic field (H) data, displayed separately for detailed analysis. 5. Exporting Data to Excel: Click “Copy as TSV/CSV” on the right-hand side. You can then paste this directly into Excel for advanced graphing and reporting. 6. Device Management: The app displays the device's serial number. If needed, reset the device by clicking “CLR” in the top-right corner and selecting “Erase Device.” This will clear all logs, which is useful for users who frequently log data and want to manage sessions cleanly.

When working at height, a fall can be life-threatening—especially if the worker is rendered unconscious. While a shock-absorbing lanyard system may prevent impact, it does not eliminate the risk of suspension trauma. To address this, FieldSENSE devices are equipped with a built-in fall detection alarm. In the event of a fall: • The device automatically detects the incident. • It then triggers an audible alarm that continues to sound until manually silenced. This alarm helps draw immediate attention to the fallen worker’s location, enabling faster assistance and significantly reducing the risk of suspension trauma. This safety feature is part of FieldSENSE’s commitment to protecting RF workers operating in high-risk environments.

The fieldSENSE60 features a specially engineered harness attachment system, designed to reduce the risk of device drops when working at height. The clip assembly consists of two interlocking parts that attach securely to your safety harness: 1. Installing the Harness Clip: • Start with the smaller rear section of the clip. • Slide it behind the webbing strap on your harness at the point where you intend to mount the device. • Then take the front section of the clip and press it firmly into place until the hooks lock in with an audible click. 2. Attaching the Device: • First, connect the lanyard to the top of the fieldSENSE60. • Then, pass the other end of the lanyard through the slot in the harness clip base. • Pull it downward until you hear a click, confirming the lanyard is securely engaged. Once installed, the fieldSENSE60 is ready for use—safely secured to your harness and protected against accidental drops. For visual guidance, refer to the illustrated instructions in the official user manual.

FieldSENSE personal RF monitors not only continuously assess and log your RF exposure—they also include a convenient voice note recording feature for field documentation. Imagine you're on-site and need to quickly capture a serial number or a critical note. Instead of pulling out your phone and risking damage or loss – like dropping it from a tower—you can simply use the FieldSENSE device itself. To record a voice note: • Double-tap the button on the device. This starts audio recording immediately. • Speak clearly into the microphone – for example, to record a serial number or location detail. • Single-tap the button to stop the recording. These voice notes are automatically time-stamped and paired with the RF exposure data being logged at that moment. Once you're back at your workstation, simply connect the FieldSENSE device to a computer. Using the FieldSENSE software, you can easily download and review both your exposure logs and the associated voice notes—helping streamline reporting, compliance, and incident documentation.

FieldSENSE devices are built to endure the demands of daily fieldwork. Over time, however, even the most reliable monitors may show signs of wear – especially when it's time for routine calibration. That’s where the FieldSENSE Refurbishment Program comes in. When you send your device in through the program, you receive back: • A fully rebuilt unit, • Fresh calibration to ensure continued compliance with international safety standards, • An extended one-year warranty on the refurbished device. This program ensures your device continues to perform at its best – both functionally and physically. For more information or to initiate the process, contact your local FieldSENSE distributor.

Frequently Asked Questions

Who needs RF anyway?

Mankind has relied on various forms of communication through the ages. Our ability to communicate effectively is what has really allowed us to become a global society. As a global village we’ve only been able to accomplish this with our ability to communicate over vast distances in very short periods of time. In this series we’ll be discussing how this has all been enabled by RF and this whole field is barely 200 years old.

Action at a distance

Just over 200 years ago Hans Christian Ørsted was busy with an experiment where he passed electoral current through a conductor and noticed a compass needle a distance away deflecting later, Faraday proved the opposite is also true, if he were to alternate a magnetic field, he would induce an electric current. All of these lay the foundations for what is now known as Maxwell’s equations, the unification of electricity and magnetism and this brings us to the next step, what is RF?

What is RF?

Communication systems rely on your ability to transmit information. Action at a distance, the phenomena first observed by Hans Christian Ørsted over 200 years ago, is the basis of our communication systems these days. RF is really just a subset of the electromagnetic spectrum and it is the frequencies which have been found to be most suitable for telecommunications purposes.

The characteristics of RF

Making use of RF for telecommunications systems relies on transmitting antennas and receiving antennas. Now, you may have heard of the near field and the far field before. Well, the near field is really the area about a transmitting antenna where there is large amounts of reactive energy. Really, where the relationship between the electric and the magnetic field are not yet fully established. the far field is what we use when working with power densities for a receiver. It is really important to understand all these fundamental characteristics of electromagnetics to make effective use thereof.

Is too much of a good thing, bad?

When working near transmitting antennas the power densities you may encounter can easily exceed the safe working limits as one of the side effects of RF is its ability to heat biological tissue these levels need to be kept in check.

Who is at risk of overexposure?

Transmitting antennas are more ubiquitous than you may realize. Professions such as HVAC, waterproofing and window washers are very often up on base stations not realizing it. Anybody who works near transmitting antennas should be taking necessary steps to ensure their levels of exposure are within the safe working limits.

How do I know if I am being overexposed?

The strength of RF is also its weakness we have no inbuilt sensor which allows us to quantify the levels which we’re exposed to. Those working around transmitting antennas, where the levels may exceed the safe working limits, really do need to have some way of quantifying these to ensure they are not in harm’s way.

What is a personal RF monitor?

To avoid overexposure to RF the accurate assessment of the levels present in the environment in which you’re working is really important. This is accomplished through the use of a personal RF monitor. These devices are specifically designed to correctly assess both the E- and the H-field and also all the sources present around these transmitting antennas and reported to you in terms of the safe working limits. This way you will know as you begin to approach these limits or even exceed them allowing you to take the necessary corrective actions in time.

The evolution of telecommunications

As our dependents on telecommunications has grown so too has the need to convey more and more information using the same scarce resource with electromagnetic spectrum. This is brought about the evolution of the communication protocols we use. What originally started as a cell phone in 1973, the first iPhone in 2007, and right now we’re up to 5G handsets able to convey vast amounts of data in a very short period of time we can only imagine where this is going. This is becoming the basis of our economies and will be for many years to come.

Frequently Asked Questions Videos

Who needs RF anyway?

Action at a distance

What is RF?

The characteristics of RF

Is too much of a good thing, bad?

Who is at risk of overexposure?

How do I know if I am being overexposed?

What is a personal RF monitor?

The evolution of telecommunications

Product Features

Isotropic

FieldSENSE personal RF monitors each have a total of six orthogonal E- and H-field probes to ensure that the combination of all sources of radiation from all angles are correctly measured and assessed in accordance with safety limits.

E- & H-fields Measured

RF Safety guidelines use the radiated power density, S in milliWatt/cm2 or Watt/m2, to assess exposure to electromagnetic fields in a given situation. This is derived from the measured E- (electric) and H- (magnetic) fields. To accurately assess a given exposure situation, both of these should be measured, especially when working very low in frequency around FM transmitters for instance. Only measuring E-field in these instances can lead to inadvertent RF overexposure.

Data Logging

The monitors have an advanced E- and H-field data logger, which records all user measurements so that they can be easily accessed over a USB connection to a PC in the office. Additionally, the data can be viewed in real-time over the USB connection with the PC application.

Voice Notes

The inbuilt logging feature allows for quick voice note taking, which can be accessed later in the office. The data is paired with the logged E- and H-fields so specific exposure conditions can easily be tagged.

Shaped Response

The exposure limits, such as the FCC (NCRP), SC6 or ICNIRP limits, are all shaped over frequency. As such, PPE must also have a shaped probe response to accurately measure in accordance with it. RF monitors without a shaped response are inaccurate and can result in an individual being overexposed.

Fall-detection & Alarm

The devices have an inbuilt fall detection system which sounds an alarm should the user accidentally fall. The alarm is easily silenced should the user still be conscious but, should they have been knocked unconscious the sounding alarm will attract the attention of colleagues. This way they are able to immediately initiate rescue actions thus reducing the potential effects of suspension trauma following a fall at height.

User Interface

FieldSENSE devices use high brightness amber LED indicators for direct sunlight visibility and have a loud buzzer to ensure the user won’t miss a thing. Additionally, it is specifically designed to be operated whilst wearing gloves.

Attachments

Devices come with an easily adjustable wrist strap to ensure comfortable attachment while working. Additionally, the fieldSENSE60 harness attachment mechanism has been completely redesigned to include a coiled lanyard system. This facilitates the smooth handling of the device during operations while still remaining visible and audible. Should the device be dropped there is no risk of it falling off the site. A tripod attachment point on the base of the device allows for setting up remote monitoring of a site, or for attaching an extension pole.

AAA batteries

The devices use readily available AAA (LR03) batteries.

“Grippy” design

The device has a custom bevelled design that fits tightly into the user’s hand with a textured soft elastomer surface and grip ridges ensuring no fumble moments.

Rugged IP64 & IK08 Enclosure

The devices have a co-moulded enclosure with a base layer of polycarbonate which is typically used in riot shields, and an outer elastomer layer made of TPU which is designed for hard wearing environments. The design provides for IP64 dust & moisture ingress rating as well as IK08 impact protection.

Zipper Case

Shipped in a heavy-duty zipper case with a custom moulded insert makes for even further protection of the device.

Brochures & Policy Documents

fieldSENSE 2.0 Data Sheet

fieldSENSE 2.0 Manual

fieldSENSE 2.0 Brochure

fieldSENSE60 Data Sheet

fieldSENSE60 Manual

fieldSENSE60 Brochure

Warranty

USA Recalibration Form

Guide

Free Guide: An Introduction to RF Safety Around Transmitting Antennas

Software Download

fieldSENSE Software

fieldSENSE60

fieldSENSE 2.0

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