water submeter for 2 family home in Newark

[Rene Bee]

Hi Everyone, 

I want to install a submeter so I can charge each tenant for their water consumption.  It is a 2 family home.  I can have the plumber install the meters.  But wondering the best way to read the meter and bill the tenant each month.  I've called a few companies and they only work with units 50+.  Any one know of a company that works with small houses or have another suggestion for metering reading and billing.  Thx!