As we know,the sensor of sony 238 is famous of it's great night vision on security camera and digital  camera market .from 2013,market borned the first cctv camera HD board :sony 238+8520(FUHAN),even though the resulotion can reach 1200TVL ,but the price is so high that many customers are not even wincing.At 2014 ,as the IPC price is lower and lower,sony 238+8520 became less and less competitive.

  In the next half year of 2014,a new technology of HD cctv came out AHD that Xiongmai discovered it,it's a samiliar technology as CVI(discoveried by DAHUA),AHD is competitived by it's very high property price ratio.AHD 960P 2431+238,the vedio is same as 960P IP camera ,and the nigh vision is better than 960P IPC 3518C+0130,less noisy ppint .Most people would like choose AHD instead IPC.

  At the begining of 2015,security market is lack of sony 238,because DAHUA and HIKVISION have monopolized sony 238,but market have endorsed AHD2431+238,last month the market begin use SONY 225 instead SONY 238,the vedio of them is same ,but market has enough SONY 225.and 2431+225 is cheaper than 2431+238.After you compared them you will found choose 2431+225 is a better choice .