An exhaust filtration system comprises a first pressure sensor and a second pressure sensor, each configured to measure pressure in the exhaust filtration system under low-flow conditions. The exhaust filtration system comprises a third pressure sensor and a fourth pressure sensor, each configured to measure pressure in the exhaust filtration system under high-flow conditions. A flow rate of exhaust gas flowing through the exhaust filtration system is periodically determined. When the flow rate is below a predetermined flow rate threshold, the first and second pressure sensors are used to measure pressure in the exhaust filtration system, and a soot load of the exhaust filtration system is estimated using the pressure measured by the first and second pressure sensors. When the flow rate is above the predetermined flow rate threshold, the third and fourth pressure sensors are used to measure pressure in the exhaust filtration system and a soot load of the exhaust filtration system is estimated using the pressure measured by the third and fourth pressure sensors.