We have designed a new current monitoring board with 6 current sensor inputs and a reference AC voltage input. We have plans on a 32 channel current monitoring board with 2 reference AC voltage inputs as well suitable for monitoring an entire circuit breaker panel. The current monitoring boards and this new board actually have an Atmel processor on them which monitors the sensors and does averaging to give an accurate current reading in mA. Current readings out of the sensors fluctuate quite a bit so you have to average several readings at a time to get an accurate reading. Also getting an accurate current reading when there are inductive loads present on the circuit is NOT child’s play let me tell you!
The new controller with AC voltage monitoring will actually return the reading in RMS so you do not have to do anything. This is part of the reason why our current monitorings board are a little expensive. There was quite a bit of firmware development in that Atmel processor to make it something anyone can use. We could sell it as more of a raw/dumbed down device but felt for most users this would a good choice.
I would also like to add that we can discount units on very high volume quantities. We can also do custom engineering/design work for users who want to have a device manufactured. We do all SMT and through hole manufacturing of the units in house. We source many parts from China(have an employee there permanently), but all semi conductors are sourced from reputable vendors. We do not source semi conductors from China directly due to the high amount of counterfeiting, we have been burned there before. That also contributes some to our prices.