Ludlum Measurements Model 43-20 Probe

Model 43-20 Gas Proportional Detector Ludlum Measurements
The Model 43-20 is a large area gas proportional detector for use in simultaneous alpha/beta surveys as well as alpha or beta surveys	PART NUMBER:47-1530
INDICATED USE: Alpha-beta survey RECOMMENDED COUNTING GAS: P-10 (10% methane, 90% argon) GAS RECHARGE: Will operate on a static charge for over 15 hours with a 39" cable WINDOW: Typically 0.8 mg/cm² aluminized mylar (other thicknesses available) WINDOW AREA: Active - 181 cm² Open - 143 cm² EFFICIENCY (4pi geometry): Typically 20% - Pu-239; 30% - Tc-99; 15% - C-14; less than 1% - gamma BACKGROUND: Alpha - Less than 5 cpm (when operating on the alpha only plateau region) Beta - Typically 400 cpm or less (10 micriR/hr field) COMPATIBLE INSTRUMENTS: Model 12, 16, 18, 2000, 2200, 2221, 2224, 2225, 2241, 2350-1 OPERATING VOLTAGE: Alpha - Typically 1000 - 1500 volts Beta-gamma - Typically 1600 - 1800 volts COUNTER THRESHOLD SETTING: Typically 2 - 5 mV GAS CONNECTORS: Double end quick disconnect CONNECTOR: Series "C" (others available) CONSTRUCTION: Anodized aluminum housing 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: 3"(7.6cm)H X 5"(12.7cm)W X 8"(20.3cm)L WEIGHT: 2 lbs (0.9kg)

Replacement Parts Mylar Window Protective Screen Gas Fittings Electrodes