Ludlum Model 53 Portal Monitor (pre 2010 model)The Model 53 Gamma Personnel Portal detects gamma radiation in or on personnel passing through the portal from either direction. This highly sensitive portal uses six large plastic scintillation detectors. Shielding is accomplished with either the standard 2. 5 cm (1 in.) Comes from a working lab in perfect working condition. Smaller footprint than larger portal monitors at a cheaper entry point.

thereby reducing the collapsed length from 105

You get these at a slight discount

These have some shielding around the detector to reduce background

one hand operation

These can be easily wheeled anywhere

4-decade range

Ludlum Part no

Much more sensitive than a Model 19 uR meter to which it is comparable

Exterior Dimensions: 2

These all have a "C" Connection

Typical Dead Time 50 µs

This meter has data logging capabiltiy