Ludlum Model 44-40

   Alpha Beta Gamma Shielded Pancake G-M Detector

Introduction

The Ludlum Model 44-40 is an alpha beta gamma radiation lead shielded pancake G-M detector for radiation contamination survey.

Specifications

PART NUMBER: 47-1538

INDICATED USE: Alpha beta gamma radiation survey; sample counting
RADIATION DETECTOR: Pancake type halogen quenched G-M
WINDOW: 1.7 ± 0.3 mg/cm² mica
WINDOW AREA:
     Active - 15 cm²
     Open - 12 cm²
EFFICIENCY(4pi geometry): Typically 5%-¹⁴C; 22%-⁹⁰Sr/⁹⁰Y; 19%-⁹⁹Tc; 32%-³²P; 15%-²³⁹Pu
SENSITIVITY: Typically 3300 cpm/mR/hr (¹³⁷Cs gamma )
ENERGY RESPONSE: Energy dependent
DEAD TIME: Typically 80 microseconds
COMPATIBLE INSTRUMENTS: General purpose radiation survey meters, ratemeters, and scalers
OPERATING VOLTAGE: 900 volts
CONNECTOR: Series "C" (others available)
CONSTRUCTION: Lead housing with beige polyurethane enamel paint
TEMPERATURE RANGE: -4° F(-20° C) to 122° F(50° C)
May be certified for operation from -40° F(-40° C) to 150° F(65° C)
SIZE: 4.5" (11.4 cm) H X 4" (10.2 cm) W X 6.5" (16.5 cm) L
WEIGHT: 5.5 lb (2.5kg)

This Product is CE Certified

Replacement Parts

• Pancake G-M Tube (Part Number: 01-5008)

• Protective Screen (Part Number: 21-9586)

Technical Information

• Model 44-40 Manual

• Model 44-40 CE Certificate

• Model 44-9 Energy Response Curve

• Model 44-9 Beta Source Efficiencies

Alternate Detectors

• Model 44-9 - Standard pancake G-M detector

• Model 44-9-18 - Pancake G-M detector with a gooseneck type flexible end with an extension handle stretching to 36" in length

• Model 44-40-2 - Pancake G-M detector with and aluminum cased lead shield

Other Ludlum Products

• Other Ludlum Products

Ludlum Information

• Ludlum Introduction

• Ludlum Resources

• Ludlum Warranty

• Ludlum Repair and Calibration

• Ludlum Training