Menu
  • Home
  • Products
    • Contamination Monitors
    • Clearance Monitors
    • Laundry Monitors
    • Vehicle Monitors
    • Data Sheets
  • Company
    • About Us
    • Ludlum Division
    • ISO 9001 Certificate
    • Quality Policy
    • Impress
    • Privacy Policy
    • Ethics Policies
  • Contact
Ludlum GmBH Transparent

+49 (0)40 2286 139 -0
  • English (United States)
  • Deutsch (Deutschland)
  • Home
  • Products
    • Contamination Monitors
    • Clearance Monitors
    • Laundry Monitors
    • Vehicle Monitors
    • Data Sheets
  • Company
    • About Us
    • Ludlum Division
    • ISO 9001 Certificate
    • Quality Policy
    • Impress
    • Privacy Policy
    • Ethics Policies
  • Contact

Products

  • Contamination Monitors
  • Clearance Monitors
    • HWM-21
    • HWM-38
    • HWM-65
    • HWM-100
    • HWM-180
    • HWM-300
    • HWM-400
    • HWM-400S
    • HWM-550
    • HWM-1800
    • HWM-1800C
  • Laundry Monitors
  • Vehicle Monitors
  • Data Sheets

HWM-400
Free Release Chamber

hwm-400-nobkg
hwm-400-nobkghwm-400_front-open-door_600px


Features

  • Reduced Dead Zones: > 70% Coverage (Inner Chamber to Detector Size)
  • Intuitive Operating Software That Is Easy to Use
  • Export of Measurement/Parameter Data in XML Format via USB
  • Energy Filter Settings to Optimize Discrimination of Background Radiation
  • Integrated Mini-UPS for Measurements During Mains Power Outage
  • Ergonomically Positioned Touch Operated Display
  • Access to Historical Measurement Data via Integrated Database
  • Access to Ludlum Test Tool Software for Detector Analysis
  • Web-Based Network Accessibility and Supervision

Free Release Monitor for Gamma Emitting Radionuclides

The HWM-400 is a compact clearance monitor for the release of materials and goods up to 150 kg (330 lb) and 400 L (14.1 ft3) in volume.

The standard unit is equipped with the following features:

  • 6 gamma plastic detectors for complete 4π coverage
  • 30 mm (1.2 in.) lead shielding
  • Built-in weight scale for up to 150 kg (330 lb)
  • Powder-coated steel frame with easy to clean stainless steel lining inside and outside
  • Integrated 17 in. touch-screen display
  • Automated measuring process with user guidance
  • Nuclide composition suggestion from detector pulse analysis
  • Network capability for remote monitoring and supervision
  • Integrated mini-UPS

The HWM-400 provides fast and reliable detection of gamma emitting radionuclides. Equipped with the latest measuring electronics and built-in maintenance module, it allows optimization of the system to ensure consistent peak performance.

 

  • Specifications
  • Options
  • Documents
  • Specifications
  • Options
  • Documents

Specifications

Standards The monitor is compliant with the following standards:
CE, CSA / UL or EMC, ISO11929
Detectors 6x gamma plastic detectors
Detector volume: > 125 L (4.41 ft3)
Direct connection of each detector to the PC via USB
User Software Intuitive operator software with touch-screen display, automated measurement process with user guidance, indications of results and measurement material position on the display. Web based for remote access.
Electronics Integrated illumination in the chamber, status-LED, interlock-relays with interface to external units
Housing Coated steel frame with stainless steel covers
Front door with special hinges and manual lock
Sensors 2 door sensors with interlock
Integrated weigh scale
Ext. Dimensions
(H x W x D)
1,979 x 1,095 x 1,118 mm (77.9 x 43.1 x 44 in.)
Chamber Volume
(H x W x D)
900 x 700 x 750 mm (35.4 x 27.6 x 29.5 in.)
473 L (16.7 ft3)
Shielding Standard: 30 mm (1.2 in.) lead
Option: 50 mm (2 in.) lead
Weight Standard: approx. 2,550 kg (5,620 lb)
Option with 50 mm lead: 3,350 kg (7,385 lb)
Power Supply External power adapter input: 100 - 240 V, 1.6 A max / 24 V, 5 A output
Uninterruptible power supply (UPS) to bridge mains power loss

Options

A range of additional options are available to enhance the capabilities of the monitor and to customize the instrument to your specific needs. Example options include:

  • Second door on the exit-side
  • External manual conveyor system (also see HWM-400S)
  • Additional lead shielding (50 mm [2 in.] instead of 30 mm [1.2 in.])
  • Integration of a camera in the chamber

Documents

  • Data Sheet

Impressum

Ludlum GmbH
Uwestr. 12
22525 Hamburg
Germany

Phone: +49 (0)40 2286 139 -0
Fax: +49 40 2286 139 10
Email:
https://ludlumgmbh.com
LinkedIn

Commercial Register Hamburg HRB 145218

Managing Directors: Dr. Ingo Kölln, Daan van Bree

VAT No. DE 313221648

Tax No. 45/735/02162

The Person Responsible for the Editorial Content: Dr. Ingo Kölln, Daan van Bree

Registry Court: Hamburg

© 2025 Ludlum Measurements, Inc.

Privacy Policy