This site introduces wide range of radiation detector / personal dosimeter catalogues including geiger counter, and any radiation detector related news and its basic knowledge.
Unfortunately, this site is all in Japanase. You can enjoy the site letting "Google Translator" interpret it or looking at the catalogue may give you a rough idea.
As of now (March 2014), the catalogue covers more than 500 radiation detectors produced today. The list is here.
The spec chart is as follows.
|manufacture||CLEAR-PULSE [official site]|
|dose rate||0.001 - 9.999μSv/h|
|measurement time||display 60s moving average in every 10s|
|energy sensitivity||above 150 keV|
|battery||two AA batteries (above 20h)|
|size（mm)||75*27*135mm / 81*32*141mm (with protection cover)|
|weight||130g (with protection cover)|
|notes||The Ministry of Education,Culture,Sports,Science & Technology in Japan adopts A2700 as a radiation detector for radiation education in elementary school. Many local authorities lend it to citizens.
It has a energy compensated system. With MCA (option), it can display gamma spectrum on PC via USB.
|purchase||item list (Rakuten Ichiba) | item list (Amazon)|
Please feel free to contact me directly geigercounter001(#)yahoo.co.jp anytime if you have any questions.
twitter : @GCC_001