Overview
RF exposure in complex environments
Because permissible exposure levels or Action Levels (ALs) vary with frequency the Nardalert S3 and RadMan 2LT & XT have shaped alarm thresholds. A shaped alarm threshold means the unit is able to cope with multiple signal environments and will alarm at a set level regardless of the AL changing with frequency. The first alarm is triggered typically at 50% of the AL with a second alarm at 100%.
Personal Monitors
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Narda Radman 2LT
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Narda Radman 2XT
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Nardalert S3
More about Personal Monitors
A flexible EMF safety solution
Field strengths can change over time: increased call traffic, new installations, fault conditions or maybe just an antenna installed in the wrong place all mean that it’s really tricky to prove compliance by periodic measurements with survey equipment.
Personal monitors are a flexible solution in that they continuously monitor whatever field strength the user is exposed to, providing an alarm when the field strength starts to become significant with regard to the Action Level (AL). It’s worth noting that even if a monitor alarms at 100% it’s unlikely there has been a true over exposure. Certainly some action is required (it’s why it’s called the Action Level), such as performing more detailed measurements to determine the field strength or relocating or reducing system power.
Even so you don’t want false alarms causing costly stoppages so it’s important that a personal monitor is as accurate as possible. Narda designed the very first personal monitor over 30 years ago so it makes sense they lead the way in design and specifications.
The RadMan 2LT is a low cost unit designed to be the telecoms workhorse covering a reduced frequency range and the RadMan 2XT covers a wider frequency range (but without a thermocouple sensor).
The Nardalert S3 has a wide frequency range covering the MF & LF bands with a unique low frequency sensor & frequencies up to 100 GHz with a thermocouple sensor ideal for radar applications.
EMF Safety News & Events
BFD-400: Digital B field measurement 1 Hz to 400 kHz
For more years than we care to remember the Narda ELT-400 was the go-to for low frequency magnetic field measurements. […]
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Radman alarms
A common question we get is what to do if a personal monitor like the Radman gives an alarm. One […]
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Narda BFD-400
Just like the rest of the range of Narda digital field probes the new BFD-400 is designed to meet the demands of different applications – as you’d expect it can be connected to a handheld meter or (coming soon) via Narda TSX software, it will be possible to directly connect just the probe to a PC, really useful in lab/test environments.
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Digital EMF Probe Repeater
Sometimes it’s really useful to connect a field probe via fibre optic cable. It might be lab use where you want to make field strength measurements in an anechoic chamber, it might be on a test range where you need a lot of distance between the field probe and you, it might be you need something with great immunity so you can make high field strength measurements.
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Static & low frequency magnetic field measurements
Industrial EMF safety assessments aren’t exactly glamorous and hazards can be overlooked in favour of things that get the headlines
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EMF safety: broadband probe correction factors
It’s not uncommon that we get questions about how a meter, like the Narda FieldMan, reads and applies probe calibration / correction factors.
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5G EMF safety assessments 2
When selecting a 5G measurement method always consider the purpose of the measurement and the audience for your results. The […]
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Service & Support
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