Ludlum 30-6

Handheld survey meter

Ludlum 30-6 – handheld survey meter from Ludlum Measurements. Measurement range as specified: 0.00 to 20 µSv/h (0.00 to 2000 µR/hr). Overall weight: 2.9 kg.

Detector: EJ-212 plastic scintillator, 15.2 × 2.5 cm (D × L)1
Measurement range as specified: 0.00 to 20 µSv/h (0.00 to 2000 µR/hr)1
Overall weight: 2.9 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

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	EJ-212 plastic scintillator, 15.2 × 2.5 cm (D × L)1

Performance

Linearity	±10 %1

Measuring range

Measurement range as specified	0.00 to 20 µSv/h (0.00 to 2000 µR/hr)1
Sensitivity (¹³⁷Cs gamma)	Typically 150 kcpm per µSv/h (1500 cpm per µR/hr)1
Response time	User-selectable from 1 to 60 seconds, auto-response rate FAST or SLOW, or Fixed FAST and SLOW1
Energy response	Energy dependent1

Power & battery

Power supply	Two alkaline or two rechargeable "AAA" batteries1
Battery life and conditions	Approximately 100 hours of operation1

Mechanical

Overall weight	2.9 kg1
Overall length	Adjustable from 111 to 161 cm, with 11 different length settings1
Dimensions	20.3 × 20.3 cm (L × W)2

Environment & ratings

Operating temperature	-20 to 50 °C1
Enclosure rating and conditions	IP52 with audio-hole seal option1

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 30-6 – Extended Reach microR Survey Meter
Publisher: Ludlum MeasurementsProduct page Specifications tab, 'Detector'; Specifications tab, 'Range'; Specifications tab, 'Sensitivity (137Cs gamma)'; Specifications tab, 'Linearity' … Checked 2026-10-16
2
Ludlum Model 30 Series manual
Publisher: Ludlum MeasurementsManual Manual p. 76 (p. 72), appendix A.2.2 Model 30-6 Specifications Checked 2026-10-16