Ludlum 2363 with Model 42-41L

Portable neutron meter

Ludlum 2363 with Model 42-41L – portable neutron meter from Ludlum Measurements.

Weight as specified: Without PRESCILA: 2.0 kg; with PRESCILA: 4.2 kg (both including batteries)1

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 Research & laboratories

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	Reading within 10 % of true value with detector connected1

Measuring range

Neutron energy range	Thermal to 100 MeV1
Sensitivity	Neutron (with Model 42-41L): approx. 35 cpm/µSv/h (350 cpm/mrem/hr), gamma rejection up to 1 mSv/h (100 mR/hr); gamma (internal detector): approx. 100 cpm/µSv/h (1000 cpm/mR/hr)1

Connectivity & interface

Detector connector	Series "C" (others available on request)1

Power & battery

Power supply	2 "D" cell batteries1
Battery life and conditions	Greater than 200 hours1

Mechanical

Overall dimensions (H × W × L)	Without PRESCILA: 19.6 × 8.9 × 21.1 cm; with PRESCILA: 32.3 × 13.7 × 34.3 cm (both including connector protrusion)1
Weight as specified	Without PRESCILA: 2.0 kg; with PRESCILA: 4.2 kg (both including batteries)1

Environment & ratings

Operating temperature	Neutron (PRESCILA): ±30% from 0 to +40 °C (32 to 104 °F); gamma (internal GM): ±10% from −20 to +50 °C (−4 to 122 °F)2

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

Documents

PDFDatablad (PDF)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 2363 with Model 42-41L Neutron Dose Survey Meter
Publisher: Ludlum MeasurementsProduct page Specifications tab, 'Neutron Energy Response'; Specifications tab, 'Sensitivity'; Specifications tab, 'Linearity'; Specifications tab, 'Power' … Checked 2026-10-16
2
Ludlum Model 2363 manual
Publisher: Ludlum MeasurementsManual Manual p. 14 (p. 3-2), section 3 Specifications Checked 2026-10-16