Ludlum 3-98

Handheld survey meter

Ludlum 3-98 – handheld survey meter from Ludlum Measurements. Weight as specified: 2.5 kg including batteries and detector.

Weight as specified: 2.5 kg including batteries and detector1

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

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

Manufacturer’s product page (opens in a new tab)

Overview

Nuclear power & nuclear technology Defence, security & preparedness Emergency services & first response Environmental monitoring & radiation protection Industry & quality control

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.

Performance

Linearity	±10 %1

Electronics & signal

Detector bias	Adjustable from 400 to 1500 V1

Connectivity & interface

Detector connector	Series "C" (others available)1

Power & battery

Power supply	2 "D" batteries1
Battery life and conditions	Typically 600 hours with alkaline batteries1

Mechanical

Dimensions (H × W × L)	22.9 x 8.9 x 21.6 cm with handle2
Weight as specified	2.5 kg including batteries and detector1

Environment & ratings

Operating temperature	-20 to 50 °C1

General

Meter dial	0–5 kcpm, BAT TEST (other meter faces available)1

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 3-98 with 44-3 – Alpha Beta Gamma Survey Meter (data sheet, Jun 2026)Datasheet · 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 3-98 – 125I & Alpha-Beta-Gamma Survey Meter
Publisher: Ludlum MeasurementsProduct page Specifications tab, 'High Voltage'; Specifications tab, 'Linearity'; Specifications tab, 'Power'; Specifications tab, 'Battery Life' … Checked 2026-10-16
2
Model 3-98 with 44-3 – Alpha Beta Gamma Survey Meter (data sheet, Jun 2026)
Publisher: Ludlum MeasurementsDatasheet Specifications, 'Size' Checked 2026-10-16