Model 702i radioisotopidentifierare

Handheld isotope identifier

A portable RIID system that detects and identifies multiple nuclides with quantified results.

Detector type: NaI, 5.1 × 3.8 cm (2 × 1.5 in)1
Energy range: 18 keV–3 MeV1
Spectrum channels: Standalone: 256/512 QCC; with Quantum: also 256/512/1024 linear2

Download product sheet (PDF)All values with references – for tender documents

Specifications checked against the manufacturer’s documents on 2026-10-16

Overview

Nuclear power & nuclear technology Defence, security & preparedness Emergency services & first response

Key features

NaI detector and integrated gamma electronics.
Time-slice analysis of measurement data.
Simple user mode and advanced settings.

Specifications

The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.

Detector

Detector type	NaI, 5.1 × 3.8 cm (2 × 1.5 in)1

Performance

Energy resolution	7%1

Measuring range

Energy range	18 keV–3 MeV1
Gamma sensitivity (¹³⁷Cs)	775 cpm per µR/hr1

Electronics & signal

Spectrum channels	Standalone: 256/512 QCC; with Quantum: also 256/512/1024 linear2

Software & data

Identification and analysis	Multiple nuclides; time-slice analysis2
Nuclide library	Selectable trigger lists for different applications, including standard ANSI isotopes, medical, industrial or SNM1

Connectivity & interface

Communication	Ethernet; CompactFlash1
Display	8.9 cm (3.5 in) transflective colour LCD, 320 × 2401

Power & battery

Batteries	8 rechargeable AA NiMH, 2450 mAh1
Battery life, generally	6–8 h with recommended batteries2

Mechanical

Dimensions with handle (H × W × D)	25.1 × 11.4 × 22.1 cm1
Weight	2.4 kg1

Environment & ratings

Operating temperature	−20 to +50 °C1
IP rating	IP561
Humidity	<95%1

Ordering & accessories

Part number	48-38001

General

Spectrum format	ANSI N42.421
Measurement functions	Nuclide identification, spectrum analysis, dose rate calculation (rem/h or Sv/h), total dose and audible search tool1
Calibration	Automatic (temperature) stabilisation with a low-level ⁴⁰K source; energy and dose-rate calibration done at the factory but available to expert users1

The data comes from the manufacturer’s published documents. Manufacturers may change specifications; the current configuration and performance are confirmed in the quotation.

Documents

PDFModel 702i Isotope Identifier with Internal DetectorDatasheet · Ludlum

Sources

The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.

1
Model 702i Isotope Identifier with Internal Detector
Publisher: Ludlum MeasurementsDatasheet p. 2, Specifications; p. 1, Additional Features; p. 2, Specifications (I/O); p. 1, Introduction; p. 2, Specifications (Power) Checked 2026-10-16
2
Ludlum Models 702i and 711i Isotope Identifiers – Technical Manual (September 2021)
Publisher: Ludlum MeasurementsManual Section 1, p. 1-1 (About Your Model 702i/711i Unit); Section 4, p. 4-1 (Spectrum Conversion); Section 3, p. 3-2 (Batteries) Checked 2026-10-16