Microwave transmission measurement Enhanced process control: Real-time, maintenance-free inline measurement of total solids in various industries. Proline Teqwave MW 300 – Total solids meterInline measuring device for total solids measurement in wastewater sludge with a compact, easily accessible transmitter Proline Teqwave MW 500 – Total solids meterInline measuring device for total solids measurement in wastewater sludge as remote version with up to 4 I/Os.