Honeywell 4905 Style Conductivity Cells 70-82-25-18 - Manual (Page 7)

Introduction
12/07 4905 Series Conductivity Cells – Installation and Maintenance 1
1. Introduction
1.1 Overview
These cells form the sensing network for industrial analyzers and transmitters designed to make continuous
measurements of electrolytic conductivity. The cells are primarily suited to measurements in effluents of
ion-exchangers and distillation columns; but appropriate constants are provided for many other
applications, including measurements in micro-electronic component washing and plating-rinse effluents.
Universal in mounting, any of the cells can be arranged for immersion (for applications where the
temperature does not exceed 85°C), insertion (1” NPT) or flow type sampling. The latter can be achieved
by use of a CPVC flow housing, a 1” pipe tee (schedule 40), or 1-1/4” plastic tee (schedule 80) installed in
a process line or bypass line as pictured in Figure 1-1.
Cell Assembly
Adapter Bushing
Schedule 80
1-1/4" Pipe Tee
Guard Tube
on Cell
a/n 23381
Figure 1-1 4905 Type Conductivity Cell Mounted in a 1-1/4”
Schedule 80 Tee Using an Adapter Bushing
ATTENTION
Please note that specific parameters of your process may prohibit the use of nickel elements. For example,
use a platinum-element cell if the cell will measure or be exposed to regeneration acids or bases.