72-900-06 Rev. F
Page 35 of 38
Use proper handling procedures including rubber gloves, eye protection and
protective clothing, when handling any acid solution.
7.3.3 Flow Sensor
The Flow Sensor uses differential pressure to cause a shuttle to rise and magnetically
activate a reed switch. Occasionally this assembly may become fouled, preventing the
shuttle from rising and/or falling.
To clean the assembly:
1. Close isolation valves and relieve system pressure from the flow assembly.
2. Remove flow cap by loosening retaining nut. Remove flow cap from flow body by pulling
straight out.
3. Remove red shuttle by pulling straight out. Note post shuttle rides on.
4. Clean all internal surfaces of flow body with soft bristle bottle brush. Be careful of the
post that the shuttle rides on, its surfaces must be clean, but do not break it while
cleaning.
5. Clean shuttle exterior surfaces and shuttle bore with a soft brush. You may use a mild
dish soap if desired. Flush well before re-installing.
6. Re-install shuttle and attach flow cap. Open isolation valves. Check for leaks.
8. SPECIFICATIONS
+/- 2% at point of measure
Maximum relay output
current
120 VAC: 8 A Resistive/General
use.4LRA/4FLA,1/10HP (motors)
220 VAC: 8 A Resistive/General
use. Not rated for motors
Temperature compensation
range
Toroidal Conductivity, standard
pH and ORP
Materials of construction
0-9999 uS/cm; 1 uS/cm
increments
Approximately 1 GPM (3,785
LPM)
Materials of construction
PVC and Glass filled
Polypropylene
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