Thanks for the information, hope to get more detail explanation.
I learnt that ADC11 have no power supply, neither battery since here powers is frequently blackout, it will be much better if there is a battery powered and own memory feature.
If available please advice complete list part no. including logger/sensor/switch/cable that fit my need ie. fast sample rate, high sensitivy, battery backup power, own memory and PC networking something like mix of EL005 + ADC11
if above spec is not available, pls advice whether EL001 + switch is also work on ADC11 (I already bought one) ? if not please update me which part no shall I order for recording open/close activity that work on ADC11 including cabling, etc ?