The Tek-DP 1610B Dual Chamber Orifice Fitting containing an orifice plate is used as a mean of generating a differential pressure in a range of gas/liquid flow measurement applications. Built on the oldest and proven differential pressure measurement technique, the Tek-DP 1610B Dual Chamber Orifice Fittings are constructed to allow ease of orifice plate replacement, reliable measurement and exceptional performance without interrupting the flow or depressurizing the line.