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Neutron Meters

Ludlum Neutron Meters Comparison Table

Image	Product	Detector Type	Linear Range	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 375-31H	External ³He Tube with 22.9 cm (9 in.) diameter moderator	0 to 100 mSv/h (0 to 10 rem/hr)	Digital Area Monitor ³He Proportional Detector Moderator: 22.9 cm (9.0 in.) dia. Sensitivity: 10,000 cpm per mSv/h (100 cpm per mrem/hr) Range: 0 to 100 mSv/h (0 to 10 rem/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

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