Narda Nardalert S3 2270/01 Personal EMF Monitor 2271/31 ICNIRP Calibrated

Please note that we have 5 of these units in stock. The item you receive may differ slightly in cosmetic appearance from the one shown, but will be in a similar overall condition.

Item Description

Condition & Functionality
Condition	Used — cosmetically good condition - multiple units ins tock so actual may differ
Functionality	Fully tested and working. Self-test passes (Memory ✓, Hardware ✓). Alarm thresholds verified at 50% and 100% of reference level.
Calibration	Professionally calibrated by Glanford Electronics Ltd (GEL), Calibration date: 01 May 2026.

What's Included

Narda Nardalert S3 Mainframe (2270/01) with fitted 2271/31 ICNIRP sensor module
Hard carry case
UK mains USB power supply / charger
USB data/charge cable
Calibration certificate (Glanford Electronics Ltd, May 2026)

The Narda Nardalert S3 (Model 2270/01) is a compact, body-worn personal EMF safety monitor designed for use in electric fields from 100 kHz to 50 GHz, with ELF immunity up to 100 kV/m. Each unit is fitted with the 2271/31 ICNIRP 1998 Occupational sensor module, configured for E-field shaped response and compliant with the ICNIRP 1998 occupational exposure guideline — widely used by telecoms engineers, antenna riggers, and RF safety officers working near base stations and high-power transmitters. All five units have been professionally calibrated by Glanford Electronics Ltd in May 2026, traceable to UK National Standards.

Unit Configuration
Mainframe Model	Narda Nardalert S3 — 2270/01
Sensor Module	2271/31 — ICNIRP 1998 Occupational, E-field, Shaped
Sensor Frequency Range	100 kHz to 50 GHz
Standard / Guideline	ICNIRP 1998 Occupational (also compliant with EMF Directive 2013/35/EU and ICNIRP 2020 for frequencies above 30 MHz)
Alarm Levels	50% and 100% of reference level (factory set; configurable via NS3-TS software)

Key Technical Specifications
Frequency Range (with 2271/31 sensor)	100 kHz to 50 GHz
Mainframe Frequency Coverage	Up to 100 GHz (sensor dependent)
Field Measured	Electric field (E-field), shaped response
Monitor Range	5% to 200% of standard or guideline
ELF Immunity (50/60 Hz)	Up to 100 kV/m
Alarm Types	Visual (LED), audible, and vibratory
Display	Colour LCD — top-mounted for at-a-glance reading when worn on body
Battery	Single RCR123A rechargeable — charges via USB
PC Interface	USB (mini) and Fibre Optic (RP-02); serial, full-duplex, 57600 baud
Weight	230 g (with sensor)
Dimensions	117 x 82.6 x 31.8 mm
Calibration Interval	4 years (mainframe); 2 years (sensor)
Compliance	ICNIRP 1998 Occupational, EMF Directive 2013/35/EU, ICNIRP 2020 (>30 MHz)

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TT Instruments is an ISO 9001 certified company based in the UK, offering a wide range of used Test & Measurement (T&M) equipment at hugely discounted prices. We specialise in telecoms and fiber optic test equipment such as OTDRs, OSAs, fusion splicers, DSL cable testers, CATV, ethernet/network testers and much more. Devices from leading brands such as EXFO, VIAVI / JDSU, Keysight / Agilent, Fujikura, Sumitomo, Narda, Argus and Anritsu are stocked by us.

We also BUY test equipment — please contact us for a quote via www.ttinstruments.com

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