thanks for the speedy reply, i am most likely to use the 2V range with 0.01V accuracy.... actually i am planning to use this as a part of hot wire anemometer to measure velocities accurately.... basically it works like this... a thin strand of wire is part of a balanced wheatstone bridge...the wire is heated by passing electric current..so when kept in flow the wire starts to cool and reaches steady state...so resistance of wire changes and the extra voltage developed is measured and hence the flow velocity is measured the voltage measurement requires voltmeter... if anyone has better ideas or suggestions .please do so...