Ludlum 2401-P DOSE

Handheld survey meter

Ludlum 2401-P DOSE – handheld survey meter from Ludlum Measurements. Weight as specified: 0.4 kg including battery.

Detector: 15.5 cm² (2.4 in²) pancake GM, integrated (protective screen window)1
Weight as specified: 0.4 kg including battery2

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.

Detector

Detector	15.5 cm² (2.4 in²) pancake GM, integrated (protective screen window)1

Measuring range

Sensitivity (¹³⁷Cs gamma)	Typically 3300 cpm per mR/hr2
Response time	Typically 11 s from 10 % to 90 % of final reading2
Energy response	With dose filter: energy compensated for gamma and X-ray; without dose filter: energy dependent2

Power & battery

Power supply	9 V battery2
Battery life and conditions	Typically 250 hours with alkaline battery2

Mechanical

Dimensions (H × W × L)	4.6 x 8.4 x 13.5 cm2
Weight as specified	0.4 kg including battery2

General

Alarm	No2

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 2401-P DOSE Pocket Size Multi-Purpose Ratemeter (data sheet)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 2401-P DOSE Pocket Size Multi-Purpose Ratemeter (data sheet)
Publisher: Ludlum MeasurementsDatasheet p. 1, Specifications 'Detector'; Introduction Checked 2026-10-16
2
Model 2401-P Dose Pancake GM Pocket-Size Survey Meter with Dose Filter
Publisher: Ludlum MeasurementsProduct page Specifications tab, 'Sensitivity (137Cs gamma)'; Specifications tab, 'Power'; Specifications tab, 'Battery Life'; Specifications tab, 'Size (H x W x L)' … Checked 2026-10-16