LUDLUM 3 SURVEY METER with 44-9 ALPHA BETA GAMMA RADIATION DETECTOR FREESHIPPING

This listing is for a GREAT Used Condition LUDLUM 3 SURVEY METER with 44-9 ALPHA BETA GAMMA RADIATION DETECTOR as can be seen in the pictures.

ALL IT NEEDS TO WORK IS A NEW BATTERY!

This unit came from a Federal University Lab, has been fully tested, and is guaranteed to be working perfectly or your money back!!!

FEEL FREE TO CHECK ALL TECHNICAL DATA ON THIS LUDLUM 3 SURVEY METER with 44-9 ALPHA BETA GAMMA DETECTOR BY GOOGLING THE FOLLOWING LINK: //ludlums.com/images/data_sheets/M44-9.pdf

General Description

The GM pancake-type detector in the Model 44-9 is one of the most popular radiation detectors used throughout the world. 

This alpha, beta, and gamma radiation detector has a rugged metal housing and is conveniently shaped and sized for checking contamination on people and objects.

This detector operates between 850 to 1000 volts, and is compatible with any Ludlum instrument capable of supplying 900 Vdc and an input sensitivity of 30 mV or higher.

Indicated Use Alpha, beta, gamma survey; Sample counting

Detector Type Pancake-type, halogen quenched G-M

Window 1.7 ± 0.3 mg/cm2 mica, protected by a stainless steel screen (79% open)

Window Area Active 15.5 cm2 (2.4 in2)

Open 12.3 cm2 (1.9 in2)

Efficiency (4π) 14C 5%

90Sr/90Y 22%

99Tc 19%

32P 32%

239Pu 15%

99mTc ≤ 1%

125I 0.2%

Typical Sensitivity            (137Cs gamma) 3300 cpm per mR/hr

Energy Response Energy dependent (see Energy Response Curve on Graphs tab)

Typical Background               (10 µR/hr field) 60 cpm

Typical Dead Time 80 μs

Operating Voltage 900 Vdc

Connector Series "C" (others available)

Input Sensitivity ≥ -30 mV

Construction Aluminum housing with beige powder-coat finish, stainless steel screen (79% open)

Size (H x W x L) 4.6 x 6.9 x 27.2 cm (1.8 x 2.7 x 10.7 in)

Weight 0.5 kg (1 lb)

INTRODUCTION:

Model 44-9 showing back view and angled handle

The Ludlum Model 44-9 GM (Geiger-Mueller) Detector with angled handle is designed and shaped for easy handling during surveys and monitoring of personnel for alpha, beta, and gamma radiation. 

A slip-resistant grip, powder-coated metal housing, and protective stainless steel screen contribute to the overall ruggedness of this instrument. The GM tube is easily removed for replaced if necessary. 

This detector operates between 850-1000 volts, with a recommendation from the tube manufacturer of approximately 900 Vdc. 

Recommended instrument input sensitivity is approximately 30 mV or higher to prevent the detector from double pulsing (where the detector “counts” a single pulse from the instrument multiple times). 

The Ludlum Model 44-9 will operate with any Ludlum instruments or equivalent instruments that provide 900 Vdc and an input sensitivity of approximately 30 mV or higher.

The detector is energy dependent, over-responding by a factor of 6 in the 60 keV to 100 keV range when normalized to 137Cs. Snap-on energy compensation filters are available (see below) that will flatten 

the energy response when exposure or dose measurements are required.

SPECIFICATIONS:

Part Number: 47-1539

INDICATED USE: alpha, beta, and gamma survey; frisking, sample counting DETECTOR: pancake-type, halogen-quenched GM

COMPATIBLE INSTRUMENTS: general purpose survey meters, ratemeters, and scalers WINDOW: 1.7 ± 0.3 mg/cm2 mica

WINDOW AREA: Active - 15.51 cm2 (2.4 in2); Open - 12.26 cm2 (1.9 in2)

EFFICIENCY (4π): 5% for 14C; 22% for 90Sr/90Y; 19% for 99Tc; 32% for 32P; 15% for 239Pu; ≤1% for 99mTc; 0.2% for 125I SENSITIVITY: typically 3300 cpm/mR/hr (137Cs gamma)

ENERGY RESPONSE: energy dependent, see optional energy filters (below) 

BACKGROUND: 60 cpm

DEAD TIME: typically 80 microseconds

OPERATING VOLTAGE: 900 Vdc

CONNECTOR: series “C” (others available)

CONSTRUCTION: aluminum housing with beige powder-coat finish, and stainless steel protective screen (79% open) 

TEMPERATURE RANGE: -15° to 50 °C (5° to 122 °F); may be certified to operate from -40° to 65 °C (-40° to 150 °F) SIZE: 4.6 x 6.9 x 27.2 cm (1.8 x 2.7 x 10.7 in.) (H x W x L) (other handle lengths are available)

WEIGHT: 0.5 kg (1 lb)

ENVIRONMENTAL RATING: IP (Ingress Protection) rating of 53

Stock # 20132