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

Health Physics

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 Convertors
  • Check Sources
  • Instrument Cases

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.

Alpha-Beta

All our instruments and detectors come standard with series "C" connectors. However, other connectors are available if specifically requested when ordering your instrument. View a list of common connectors.

Detector Reference Chart

Image Product
m43-1-1_a_angle
Model 43-1-1

ZnS(Ag) + Plastic Scintillator

83 cm2 (12.9 in2)

239Pu : 30%
90Sr/90Y : 30%
14C : 4%

m43-2-2_c_window_end
Model 43-2-2

ZnS(Ag) + Plastic Scintillator

9.7 cm2 (1.5 in2)

239Pu : 25%
90Sr/90Y : 20%
14C : 5%

m43-65_a-profile
Model 43-65-2

ZnS(Ag) + Plastic Scintillator

63 cm2 (9.8 in2)

230Th : 20%
239Pu : 20%
99Tc : 15%
90Sr/90Y : 20%
14C : 1%

m43-89
Model 43-89

ZnS(Ag) + Plastic Scintillator

125 cm2 (19.4 in2)

239Pu : 20%
99Tc : 10%
90Sr/90Y : 20%

m43-93
Model 43-93

ZnS(Ag) + Plastic Scintillator

100 cm2 (15.5 in2)

239Pu : 20%
99Tc : 15%
90Sr/90Y : 20%

m43-147
Model 43-147

ZnS(Ag) + Plastic Scintillator

200 cm2 (31.0 in2)

239Pu : 20%
99Tc : 13%
90Sr/90Y : 20%

m43-68_angle
Model 43-68

Rechargable Gas Proportional

126 cm2 (19.5 in2)

239Pu : 20%
14C : 15%
 99Tc : 30%
 90Sr/90Y : 20%
Gamma : 1%

m43-143-1_a
Model 43-143-1

Gas Proportional

100 cm2 (15.5 in2)

239Pu : 20%
14C : 15%
99Tc : 30%
90Sr/90Y : 20%
Gamma : 1%

m43-37-1_h-web_2_1706169478
Model 43-37 Series

Large-Area Gas Proportional

584 cm2 (90.5 in2)
or
821 cm2 (127 in2)

Gross Counting
239Pu : 20%
99Tc : 30%
90Sr/90Y : 30%
Gamma 1% 

Alpha-Beta Counting
239Pu : 17.5%
99Tc : 20%
90Sr/90Y : 20%
Gamma 1% 

model_43_135-1
Model 43-135-1

Gas Proportional
For Large-Area Source Calibration

500 cm2 (77.4 in2)
Windowless

239Pu : 42%
230Th : 33%
99Tc : 55%
63Ni : 37%
90Sr/90Y : 55%

Results 1 - 10 of 10

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.