T.E. SURVEY METER

The HPI model 1010 is a portable survey meter. It can accurately and quickly evaluate low level continuous or pulsed radiation fields, and also provides a tool for general surveying of penetrating radiation hazards.
The instrument can be used to scan for near background levels on the 0.1 mradh range. If accurate measurements are needed at these levels, the dose can be integrated for a short time using the 0.01 mrad range. Used in this manner the Model 1010 becomes a fence post monitor.
The detector is tissue equivalent, and all measurements are taken as the absorbed dose in soft tissue. In mixed radiation fields which would be in the vicinity of accelerators, or in gamma-neutron fields, the reading can be corrected by a quality factor to obtain the dose equivalent.
The instrument’s high sensitivity, wide range, and tissue equivalent response are the result of an HPI developed multiplying ion chamber. It is made of tissue equivalent plastic and is operated with gas multiplication. This detector makes possible a survey meter with unsurpassed characteristics: tissue response, a sensitivity of 0.1 mradh full scale, and a wide range extending to 1 radh in 5 linear decade ranges.