Ludlum Model 43-9 Alpha Sample Counter HeadIndicated Use Sample counting Detector ZnS(Ag) scintillator Window 0. 4 mg cm2 Efficiency 230Th: 30% Typical Background (10 R hr) 3 cpm Photomultiplier Tube 3. 8 cm (1. 5 in.) diameter Operating Voltage 500 to 1200 V Sample Size (max.) 2. 54 cm (1 in.) dia. Sample Holder O ring sealed stainless steel slide Size (D x L) Detector: 7. 6 x 21. 6 cm (3 x 8. 5 in.) Sample Tray: 4. 6 x 14 cm (1. 8 x 5. 5 in.) Weight 0. 9 kg (2 lb)

A nuclear counting gas bottle and a survey instrument are additionally required for the operation of the floor monitor

though two would increase throughput and provide a backup for use during maintenance periods

• Partial ANSI N42

and this is an inexpensive way to do it

Model 3003

The adjustable beta shield is a 360-degree shield with a linear movement to permit discrimination between penetrating and non-penetrating

This Meter is Counts

Low Alarm Remote

gamma radiation survey

Amongst the lowest MDA/largest counting chamber volume combinations

There is no limit to the counts that can be saved with a CountsPro

Anti-jam recovery of the sample changer mechanism protects samples