Counter Heads

Counter Heads

Model 43-9

Ludlum Part Number: 47-1525

Alpha Radiation Sample Counting Head
ZnS(Ag) Scintillation Radiation Detector
Used with Ludlum Models 2000, 2200, 2221, 3000 Series, 2241 Series
Efficiency (4π): 30% Th-230

Sample Size: 1.5 in.
Window: 0.4 mg/cm²
Background: 3 cpm or less

Data Sheet Product Manual

Model 43-10

Ludlum Part Number: 47-1526

Alpha Radiation Sample Counting Head
ZnS(Ag) Scintillation Radiation Detector
Used with Ludlum Models 3030E, 2000, 2200, 2221, 3000 Series, 2241 Series
Efficiency (4π): 37% Pu-239

Sample Size: 2 in.
Windowless
Background: 3 cpm or less

Data Sheet Product Manual

Model 43-10-1

Ludlum Part Number: 47-1305
Alpha/Beta Radiation Sample Counting Head
ZnS(Ag) and Plastic Scintillation Detector
Used with Ludlum Models 3030E, 3002, 2360
Efficiency (4π): 37% Pu-239; 32% Th-230; 39% U-238; 5% C-14; 27% Tc-99; 29% Cs-137; 26% Sr-90/Y-90
Sample Size: 2 in.

Window: 0.4 mg/cm²
Alpha Background: 3 cpm or less
Beta Background: 80 cpm
Alpha to Beta Crosstalk: 10% or less
Beta to Alpha Crosstalk: 1% or less

Data Sheet Product Manual

Model 43-78

Ludlum Part Number: 47-2180

Alpha Radiation Large Sample Counting Head
ZnS(Ag) Scintillation Radiation Detector Adhered to Light Pipe
Efficiency (4π): 37% Pu-239; 37% Th-230
Used with Ludlum Models 2000, 2200

Sample Size: 5 x 0.18 in.
Windowless
Background: 3 cpm or less

Data Sheet Product Manual

Model 43-78-1

Ludlum Part Number: 47-2307

Beta Radiation Large Sample Counting Head
ZnS(Ag) Scintillation Radiation Detector Adhered to Light Pipe
Efficiency (4π): 40% Sr-90/Y-90; 12% C-14; 35% Tc-99

Used with Ludlum Models 2000, 2200
Sample Size: 5 x 0.18 in.
Windowless
Background: 500 cpm or less Beta/Gamma

Data Sheet Product Manual

Model 43-78-2

Ludlum Part Number: 47-2620

Alpha/Beta Radiation Sample Counting Head
ZnS(Ag) and Plastic Scintillation Detector
Used with Ludlum Model 3030E
Efficiency (4π): 37% Pu-239; 37% Sr-90/Y-90
Shielding: 0.75 in. Lead

Sample Size: 3 x 0.18 in.
Window: 0.4 mg/cm²
Alpha Background: 3 counts per 10 minutes
Beta Background: 100 cpm or less

Data Sheet Product Manual

Model 44-110-4

Ludlum Part Number: 47-3929

Low Energy Alpha/Beta Radiation Sample Counting Head
Windowless Gas Flow Proportional Detector
Used with Ludlum Model 2200

Efficiency (4π): 12% Ni-63; 34% Pu-239
Sample Size: 2.0 x 0.4 in.
Background: 300 cpm in Beta Mode

Data Sheet Product Manual

Model 120

Ludlum Part Number: 47-1625

Alpha/Beta/Gamma Sample Counting Head
P-10 Gas Flow Proportional Radiation Detector
Used with Ludlum Models 3000, 12, 2200, 2221, 2241, 2241-2, 2350-1, 3030E
Efficiency (4π): 10% C-14; 42% Sr-90/Y-90; 35% Th-230; less than 1% Gamma

Sample Size: 2.0 in.
Window Active/Open Area: 32 cm²
Window: 0.4 mg/cm²
Alpha Background: 3 cpm or less
Beta Background: 100 cpm or less

Data Sheet Product Manual

Model 180-8

Ludlum Part Number: 47-1549

Low Background Alpha/Beta/Gamma Radiation Sample Counting Head
End Window Halogen Quenched GM Detector
Used with Ludlum Models 2000, 2200
Efficiency (4π): 2% C-14; 10% Sr-90/Y-90; 7% Pu-239

Sensitivity: 2100 cpm/mR/hr (Cs-137 Gamma)
Sample Size: 1.8 in.
Window Active Area: 6 cm²
Window Open Area: 5 cm²
Window: 1.7 ± 0.3 mg/cm²
Background: 14 cpm

Data Sheet

Model 203

Ludlum Part Number: 47-1638

Shielded Well Gamma Radiation Assay/Gross Counting Head
Used with Ludlum Models 2000, 2200, 2221 and others
2 x 1.8 in. Integral NaI(Tl) Well Scintillation Radiation Detector
Well: 0.66 x 1.6 in.

Efficiency (4π): 65% I-129; 33% Cs-137; 43% Co-60
Sensitivity: Will Detect 0.005 mCi Gamma or 200 dpm Removable Contamination for Tc-99m; I-131; Tl-201; In-111; I-125; Cs-137; Co-60; Ga-67
Background: 500 cpm or less

Data Sheet Product Manual

Model 243

Ludlum Part Number: 47-1621

Shielded Well Gamma Radiation Assay/Gross Counting Head
Used with Ludlum Models 2000, 2200, 2221 and others
1.8 x 2 in. Integral NaI(Tl) Well Scintillation Radiation Detector
Well: 0.7 x 1.6 in.

Efficiency (4π): 65% I-129; 33% Cs-137; 43% Co-60
Sensitivity: Will Detect 0.005 mCi Gamma or 200 dpm Removable Contamination for Tc-99m; I-131; Tl-201; In-111; I-125; Cs-137; Co-60; Ga-67
Background: 1000 cpm or less

Data Sheet Product Manual

Model 182

Ludlum Part Number: 47-1633

Radon Flask Counter
Uses Scintillation Techniques
Used with Ludlum Models 2000, 2200

Photomultiplier Tube: 2 in. Diameter
Sample Size: 2.4 x 5 in.

Data Sheet Product Manual