Ludlum 3005/4

Handheld survey meter

Ludlum 3005/4 – handheld survey meter from Ludlum Measurements. Detector: Energy-compensated GM. Enclosure rating and conditions: IP53.

Detector: Energy-compensated GM1
Enclosure rating and conditions: IP531
Weight as specified: 1.06 kg1

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

Key features

Detector: Energy-compensated GM
Detector bias: 550 V
Linearity: ±10 %

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	Energy-compensated GM1
Internal detector	Energy-compensated GM1

Performance

Linearity	±10 %1
Resolution time	Approximately 5 µs as defined by IEC 603251

Measuring range

Response time	User-selectable from 1 to 60 s, or Auto-Response Rate FAST or SLOW1
Internal detector range	10 µSv/h to 500 mSv/h (1 mR/hr to 50 R/hr)1
Energy response	60 keV to 3 MeV (±25%)1

Electronics & signal

Detector bias	550 V1

Power & battery

Power supply	Four alkaline “AA” batteries1
Battery life and conditions	Approximately 750 hours of operation (as low as 100 hours with backlight configured for continuous-on)1

Mechanical

Dimensions (H × W × L)	16.5 x 11.4 x 21.6 cm1
Weight as specified	1.06 kg1

Environment & ratings

Operating temperature	-20 to 50 °C1
Enclosure rating and conditions	IP531

Ordering & accessories

Part number	48-42591

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 3005 – Digital Survey Meter with Internal Detector
Publisher: Ludlum MeasurementsProduct page Specifications tab, 'Detector'; Specifications tab, 'High Voltage'; Specifications tab, 'Linearity'; Specifications tab, 'Power' … Checked 2026-10-16