Thermo Scientific AquaSensors
™
AnalogPlus
™
Differential pH Sensor User Guide
23
3.4.6.
Flow Chamber Mounting
Thermo Scientific AquaSensors Flow chambers are compatible with 1 inch diameter pH sensors that
are configured with a flat salt bridge with a face seal. These salt bridges can be retrofitted to any
Thermo Scientific AquaSensors pH sensor. The flow chamber is mounted at a minimum of 15° above
horizontal with the inlet at the bottom and the outlet at the top. The sensor is inserted into the chamber
so that the salt bridge face seal seats. A retaining ring is used to lock the sensor in place.
1.0 inch pH Sensor
Flow Chamber Retaining Ring
3.4.7.
Wash Head Accessory
In application where the sensor head is quickly fouled with sediment, a wash head assembly can be
attached. The head slips on the body of the sensor and the wash nozzle is aligned with the glass pH
electrode. A single screw is tightened to secure the wash head to the sensor. A hose is connected
from the wash head to an air compressor or water source valve that is controlled by an AV88 wash
relay that is programmed with a wash interval and duration.
.
Salt Bridge Face Seal
Flow Chamber
Flow Chamber Inlet
Flow Chamber Outlet
Mounting screw
(1 of 4)
1.5 Inch pH Sensor
Wash Head
Hose Inlet
Wash Nozzle
Lock Screw
Figure 3.15:
pH Sensor with Face Seal Mounted in
a Flow Chamber.
Figure 3.16:
pH Sensor with Wash Head Attached
