Portable neutron survey meter - NSN3

Neutron radiation measurement

Fields of application

It is intended to protect workers at nuclear facilities and throughout the fuel cycle, at research centers, at particle accelerators, and among civil defense first responders.

Benefits

Lightweight and ultra-handy
Without ³He or BF3
Excellent Gamma rejection
Extended measuring range

Reference : NSN3

Retail price
, depending onconfiguration €17,296

Discounts available on request

Features
Documentation

Features

The NSN3 neutron radiometer measures the ambient dose-equivalent rate. It is designed to protect workers at nuclear facilities and throughout the fuel cycle, as well as at research centers, particle accelerators, and civil defense first-response teams. The NSN3’s innovative gas-counter detection principle relies on an organic gas mixture composed of methane and nitrogen (neutrons are measured by this gas mixture).

Fast neutrons are detected via the elastic scattering reaction of hydrogen from methane. Slow, thermal neutrons are detected via the 14N (n,p) 14C reaction involving nitrogen. The proton energy in this reaction is 626 keV.

Standard		Complies with IEC 61005 (2014), JIS Z 4341 (2006), and CE standards
Measured radiation		Neutron H(10), excluding pulsed neutrons*
Detector		Proportional flow meter for an organic gas mixture containing a flammable gas
Moderator		Polyethylene
Measuring range	Dose rate	1 µSv/h to 99.999 mSv/h
	Dose	0.1 µSv to 99.999 mSv
Accuracy	Dose rate	±20% or less at 10 µSv/h
	Dose	±20% or less at 1 µSv
Energy range		0.025 eV to 15 MeV
Energy dependence		Compliant with ICRP Publication 74 – H(10)/Φ* response curve
Angular dependence		±25% or less, from 0° to ±90° (²⁵²Cf or Am-Be)
Dose Rate Characteristics		-17% to +25% or less, reference 10 µSv/h
Gamma-ray sensitivity		≤ 1% up to 10 mSv/h for ¹³⁷Cs
Switching the time constant		Manual selection between two modes: Long (L) and Auto (A). Automatic switching of the time constant based on the dose rate.
Switching the measurement range		Automatic switching between µSv/h and mSv/h
Display		5-digit digital color display with high visibility and a wide viewing angle
Preset dose accumulation time		Adjustable from 1 to 999 minutes, in 1-minute increments
Memory		Storing measurements and their timestamps in internal memory
Communication / External Output		Serial Communication and Data Transfer via USB Port
Power supply		6 AA alkaline batteries
Battery life		About 40 hours with the LCD screen turned off
Operating temperature		0 °C to 35 °C
Operating humidity		35 to 90% RH, non-condensing
Dimensions		Approximately 165 (W) × 305 (L) × 225 (H) mm, excluding protruding parts
Weight		About 3.5 kg