Menu
  • Home
  • Products
    • All Products
    • Health Physics
    • Medical Physics
    • Metal Recycling
    • Monitoring Systems
    • Emergency Response
    • How To Order
    • Connector Types
  • Support
    • Service Center
    • Training
    • Product Videos
    • Webinars
    • Software & Firmware Downloads
    • Rad Pro Calculator
    • Warranty Plans
    • Radiation Resources
    • Field Service Support
  • Documents
    • Product Manuals
    • Detector Reference Chart
    • Response Curves
    • Test Reports
    • Newsletter Archive
    • Technical Articles
    • End User Statement Form
    • Price List
  • Company
    • About Us
    • Ludlum Family of Companies
    • Directions to Facilities
    • Exhibition Schedule
    • ISO 9001 Certificate
    • ISO/IEC 17025 Accredited
    • Radioactive Material Licenses
    • Mobile App Privacy Policy
    • Sales Tax Business Licences
    • Terms & Conditions
    • Export Information
    • Ethics Policies
  • Careers
  • Contact Us
    • Ludlum Headquarters
    • U.S. Contacts
    • International Contacts
    • Sales Contact Form
    • Feedback Form
Ludlum Measurements Logo
(800) 622-0828 (US, CA)
(325) 235-5494
(325) 235-4672



Field Service Support

To search products by model number, enter "m..."
(Ex: Enter "m3" to search for Model 3.)

  • Home
  • Products
    • All Products
    • Health Physics
    • Medical Physics
    • Metal Recycling
    • Monitoring Systems
    • Emergency Response
    • How To Order
    • Connector Types
  • Support
    • Service Center
    • Training
    • Product Videos
    • Webinars
    • Software & Firmware Downloads
    • Rad Pro Calculator
    • Warranty Plans
    • Radiation Resources
    • Field Service Support
  • Documents
    • Product Manuals
    • Detector Reference Chart
    • Response Curves
    • Test Reports
    • Newsletter Archive
    • Technical Articles
    • End User Statement Form
    • Price List
  • Company
    • About Us
    • Ludlum Family of Companies
    • Directions to Facilities
    • Exhibition Schedule
    • ISO 9001 Certificate
    • ISO/IEC 17025 Accredited
    • Radioactive Material Licenses
    • Mobile App Privacy Policy
    • Sales Tax Business Licences
    • Terms & Conditions
    • Export Information
    • Ethics Policies
  • Careers
  • Contact Us
    • Ludlum Headquarters
    • U.S. Contacts
    • International Contacts
    • Sales Contact Form
    • Feedback Form
Health Physics Medical Physics Metal Recycling Monitoring SystemsEmergency Response

All Products

Portable Survey Meters

  • Friskers
  • General Purpose - Digital
  • General Purpose - Analog
  • Computerized
  • Data Loggers
  • Specialized Meters
  • Geiger Counters
  • Intrinsically Safe
  • Ion Chambers
  • Isotope Identifiers
  • microR / microSv Meters
  • Extended Reach microR / microSv Meters
  • Neutron Meters
  • Pocket-Size Meters
  • Scaler-Ratemeters
  • Stretch Scopes

Personal Radiation Meters

No subcategories

Benchtop Meters

No subcategories

Scalers / Counters

No subcategories

Pulsers

No subcategories

Detectors

  • Alpha
  • Alpha-Beta
  • Alpha-Beta-Gamma
  • Beta
  • Gamma GM
  • Gamma Scintillator
  • Low-Energy Gamma Scintillator
  • Neutron
  • Waterproof Detectors
  • Pipe Detectors
  • Sample Counter Heads
  • Sample Holders

Monitoring Systems

  • Area Monitor Controllers
  • Area Monitoring Systems
  • Portal Monitors
  • Monitoring Systems
  • Contamination Monitors
  • Article Monitors
  • Air Monitors
  • Hand & Foot Monitors
  • Body Monitors
  • Vehicle Monitors
  • Scrap Monitoring Systems
  • Laundry Monitors

Ground/Floor Surveying

No subcategories

Sample Counting

  • Sample Counting Systems
  • Scalers / Counters
  • Sample Counter Heads
  • Protean Instrument Alpha-Beta Counting Systems

Tritium Monitoring

No subcategories

NORM Kits

No subcategories

Dosimetry

  • Dosimeters
  • Dosimeter Accessories

Accessories

  • Detector Accessories
  • Handles & Straps
  • Audio
  • Cables, Connectors & Signal Converters
  • Check Sources
  • Instrument Cases

Medical Physics

  • Radiation Safety QA
  • Imaging QA Test Tools
  • CT / MRI QA
  • Mammography QA
  • Ultrasound QA
  • Nuclear Medicine QA & Safety

Emergency Response Kits

  • General Response Kits
  • Medical Response Kits
  • Decontamination Kits

Need Help?

Unsure about which instrument is best for your application?

Find your region's Ludlum representative or dealer.

  • US Contacts
  • International Contacts

OR

Contact Ludlum Sales:

(800) 622-0828 (USA Toll Free)

(325) 235-5494

Newsletter

Subscribe to our customer newsletter! Stay informed about Ludlum products and services, and get helpful support tips.

Please enable the javascript to submit this form

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

hvl_filter_holder_500px_1644155434

Model L-435

HVL Filter Holder

Part Number: 99-9428

The new Ludlum L-435 HVL Filter Holder is designed to simplify the routine HVL measurement process. For years the method of attaching the HVL filters to the X-ray collimator involved using quantities of medical/surgical tape. While tape does the job, it also tends to destroy the thinner aluminum filters, particularly the high purity mammography filters.

The Model L-435 HVL Filter Holder eliminates the need to use tape to attach the HVL filters to the collimator housing.

The filter holder consists of a polycarbonate base 24.1 x 24.1 cm (9.5 x 9.5 in.). Permanently bonded to the center of the base plate is an acrylic pocket, open on one side and designed to hold a standard or high purity Al filter set. The polycarbonate material is easily cut with a standard utility knife or sheers to accommodate the two most common collimator track sizes in a given department. The base may also be attached with the hook-and-loop type fastener strips supplied for odd sized collimators. In either case, the filters themselves are protected from damage associated with the application and removal of heavy medical/surgical tape.

 

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

Specifications

Base Material Polycarbonate, 24.1 x 24.1 cm (9.5 x 9.5 in.)
Filter Pocket Acrylic, 10.2 x 10.2 x 9 mm

Options

OptionDescriptionPart Number
hvl_filter_plate_4e0e417b070a1
Model L-430, L-431, L-434
HVL filter plates Various
l-116_500px
Model L-116
CR/DR TG-116 filter holder set 99-9427

Documents

  • Data Sheet

Ludlum Measurements, Inc.
501 Oak Street
Sweetwater, TX 79556
USA

(800) 622-0828 (US & Canada)
(325) 235-5494
(325) 235-4672

All Products

Service Center

Training

About Us

Careers

Ludlum Family

Directions to Facilities

U.S. Contacts

International Contacts

Privacy Policy

Follow Us

LinkedIn

Facebook

YouTube

© 2025 Ludlum Measurements, Inc.