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Ludlum Neutron Meters Comparison Table

Image	Product	Features

	Model 30-7 Series	Digital Meter ³He Proportional Detector Moderator: 19.5 cm (7.7 in.) dia. Sensitivity (²⁴¹AmBe): 4.5 cpm per µSv/h (45 cpm per mrem/hr) or 10 cpm per µSv/h (100 cpm per mrem/hr) Range: 0 to 99.9 mSv/h (0 to 9.99 rem/hr)
	Model 3007 Series	Digital Meter ³He Proportional Detector Moderator: 19.5 cm (7.7 in.) dia. Sensitivity (²⁴¹AmBe): 4.5 cpm per µSv/h (45 cpm per mrem/hr) or 10 cpm per µSv/h (100 cpm per mrem/hr) Range: 0 to 100 mSv/h (0 to 10,000 rem/hr) Internal Detector Option for Exposure/Dose Measurements
	Model 12-4-7	4-Range Analog Meter Moderator: 19.5 cm (7.7 in.) dia. Sensitivity (²⁴¹AmBe): 10 cpm per µSv/h (100 cpm per mrem/hr) Range: 0 to 100 mSv/h (0 to 10,000 mrem/hr)
	Model 30-4	Digital Meter ³He Proportional Detector Moderator: 22.9 cm (9.0 in.) dia. Sensitivity (²⁴¹AmBe): 10 cpm per µSv/h (100 cpm per mrem/hr) Range: 0 to 99.9 mSv/h (0 to 9.99 rem/hr)
	Model 12-4	4-Range Analog Meter Model 42-31H ³He Proportional Detector Moderator: 22.9 cm (9.0 in.) dia. Sensitivity (²⁴¹AmBe): 10,000 cpm per mSv/h (100 cpm per mrem/hr) Range: 0 to 100 mSv/h (0 to 10,000 mrem/hr)
	Model 2241-4	Digital Scaler-Ratemeter Model 42-31H ³He Proportional Detector Moderator: 22.9 cm (9.0 in.) dia. Sensitivity (²⁴¹AmBe): 30 cpm per mrem/hr Range: 0 to 100 mSv/h (0 to 10,000 mrem/hr)
	Model 2363 with 42-41L	Neutron and Gamma Detection Analog + Digital Scaler-Ratemeter External Model 42-41L PRESCILA Detector Neutron Sensitivity: 350 cpm per mrem/hr Range: 0.1 mrem/hr to 1 rem/hr Internal GM Detector Gamma Sensitivity: 1000 cpm per mR/hr Range: 1 µSv/h to 10 m Sv/h (0.1 mR/hr to 1 R/hr)
	Model 15	Neutron and Alpha-Beta-Gamma Detection 4-Range Analog Meter Model 42-14H ³He Proportional Detector Sensitivity (²⁴¹AmBe): 55 cpm per mrem/hr Model 44-7 End-Window GM Detector Sensitivity (137Cs): 2100 cpm per mR/hr Range: 0 to 500,000 cpm