In wet gas scrubbers, scrubbing effectiveness is maintained by keeping an excess concentration of the scrubbing chemical - either caustic or acid - depending on the waste gas. pH provides a measure of this concentration that can be used to control the addition of make-up chemicals. ORP measurement may also be used if the scrubbing involves an oxidation and reduction reaction. Dirty scrubbing water can plug a pH sensor or ORP sensor, leading to a shorter sensor life. The Rosemount™ 396P pH/ORP Sensor is ideal for wet gas scrubbers due to its large area reference junction that resists coating and plugging.
Трехканальный анализатор модели 1057 имеет входы с датчиков pH/ОВП/ селективного определения ионов или проводимости/сопротивления при контакте. При неограниченном выборе двойных измерений можно сократить затраты на контур и сэкономить место на панели.