Ludlum 3007Bi/1

Portable neutron meter

Ludlum 3007Bi/1 – portable neutron meter from Ludlum Measurements. Detector: ³He proportional detector. Measurement range: 0 - 100 mSv/h (0 - 10,000 mrem/hr).

Detector: ³He proportional detector1
Measurement range: 0 - 100 mSv/h (0 - 10,000 mrem/hr)1
Weight as specified: 5.5 kg, with batteries1

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

Key features

Detector: ³He proportional detector
Measurement range: 0 - 100 mSv/h (0 - 10,000 mrem/hr)
Detector bias: Adjustable from 300 to 2400 Vdc

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	³He proportional detector1
Internal gamma detector	CsI scintillator, 18 × 18 mm1

Performance

Linearity	±10 %1

Measuring range

Measurement range	0 - 100 mSv/h (0 - 10,000 mrem/hr)1
Response time	User-selectable from 1 to 60 seconds, auto SLOW, auto FAST, fixed SLOW (22 s), or fixed FAST (4 s)1
Internal gamma range	Background–500 µSv/h1
Neutron sensitivity (bare ²⁴¹AmBe)	Typically 4.5 cpm per µSv/h (45 cpm per mrem/hr)2
Dose response condition	Not energy compensated; energy response can over/underreport dose1

Electronics & signal

Detector bias	Adjustable from 300 to 2400 Vdc1

Power & battery

Power supply	Four alkaline "AA" batteries1
Battery life	Approximately 175 hours1

Mechanical

Dimensions (H × W × L)	37.1 x 19.5 x 24.4 cm1
Weight as specified	5.5 kg, with batteries1

Environment & ratings

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

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 3007 Series – Neutron Dose Survey Meter With Optional Internal Gamma Detector
Publisher: Ludlum MeasurementsProduct page Specifications tab, 'Detector'; Specifications tab, 'Measurement Range'; Specifications tab, 'High Voltage'; Specifications tab, 'Linearity' … Checked 2026-10-16
2
Model 3007i and 3007Bi Series (instruction manual)
Publisher: Ludlum MeasurementsManual p. 33 (PDF p. 41), Chapter 3 'Specifications' Checked 2026-10-16