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.

m43-65_a-profile
m43-65_a-profilem43-65_b-frontm43-65_d-upright

Model 43-65-2

Alpha-Beta Detector

Part Number: 47-2397

 

  • Specifications
  • Suggested Instruments
  • Documents
  • Specifications
  • Suggested Instruments
  • Documents

Specifications

Indicated Use Alpha-beta survey
Detector Type ZnS(Ag) scintillator adhered to 0.03 cm (0.01 in.) thick plastic scintillator
Window 1.2 mg/cm2 metallized polyester
Window Area Active: 63 cm2 (9.8 in2)
Open: 50 cm2 ( 7.8 in2)
Efficiency (4π)  230Th: 20%
239Pu: 20%
99Tc: 15%
90Sr/90Y: 20%
14C: 1%
Typical Background
(10 µR/hr field)
Alpha: ≤ 3 cpm
Beta: ≤ 200 cpm
Cross Talk Alpha to Beta: < 10 %
Beta to Alpha: < 1%
Detector Uniformity within 10% of average reading
Photomultiplier Tube 3.8 cm (1.5 in.) diameter, magnetically shielded
Operating Voltage 500 to 1200 V (typical)
Connector Series "C" (others are available)
Construction Aluminum housing with beige powder coat
Size (H x W x L) 10.2 x 10.2 x 24.9 cm (4 x 4 x 9.8 in.)
Weight 0.5 kg (1.2 lb)

Suggested Instruments

ModelDescriptionPart Number
m3002_frontrtangleview_500
Model 3002
Digital Survey Meter
  • For alpha-beta counting
  • Stores up to 1000 data points
48-4037
m2224-1-web
Model 2224-1
Analog Scaler-Ratemeter with Digital LCD
  • Simultaneous alpha-beta counting
48-2679
m2360-lft-angle-trans_500px
Model 2360
Analog Datalogging Meter with Digital Scaler LCD
  • Simultaneous alpha-beta measurements
  • Stores 550 data points
48-2872
m3030e_545x700
Model 3030E
Alpha-Beta Scaler
  • Dual channel for alpha-beta sample counting
  • Scaler Range: 0 to 999,999 counts
  • Timer: 0.1, 0.5, 1, 2, 5, 10, or 60 minutes
  • PC interface
48-3448
Alpha-Beta Scaler
  • Dual channel for alpha-beta sample counting
  • Scaler Range: 0 to 999,999 counts
  • Timer: 0 - 990 minutes
48-1426

Documents

  • Data Sheet
  • Product Manual

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.