Honeywell 4905 Style Conductivity Cells 70-82-25-18 - Manual (Page 13)

Installation
12/07 4905 Series Conductivity Cells – Installation and Maintenance 7
3.6 Insertion-Type Mounting
The cell can be inserted into a 1” N.P.T. threaded opening, but it is imperative that the tank or chamber be
full under all process conditions. Make certain the liquid head is above the cell location. A vertical
insertion (from above) or a horizontal insertion can be used. To install, simply tighten the cell into a 1”
N.P.T. threaded opening (using a Teflon thread compound such as Teflon tape) so that the entire electrode
is immersed in the measured solution. Allow at least 1/2-inch clearance beyond the end of the cell. In
applications where vertical mounting is required, avoid a position with the cell channels pointed up, as this
will permit solution to flow down into the open end of the cell and may result in clogging by solids settling
in the cell channels. See Figure 3-1.
C
EL
L
IN
11/2"
(38mm)
83/4"
(222mm)
131/4"
(337mm)
1" Fitting
Allow73/4" (197mm) for removal o f cell
3/4" NPT
FlowIn
FlowChamber
11/2"
(38mm)
Octagon
3/4" NPT
FlowOut
1 1/2"
(38mm)
11/2"
(38mm)
Octagon
2" min.
(51mm) C
E
L
L
IN
Notes
1.
Mount cell and flow chamber horizontally as shown above with flow exit “up to eliminate possible air gap around cell body.
2. If cell and flow chamber must be mounted vertically, attach a short length of tubing to flow exit as shown below and form
a trap to ensure filing of flow chamber, especially at low flow.
C
EL
L
IN
11/2"
(38mm)
83/4"
(222mm)
131/4"
(337mm)
1" Fitting
Allow73/4" (197mm) for removal o f cell
3/4" NPT
FlowIn
FlowChamber
11/2"
(38mm)
Octagon
3/4" NPT
FlowOut
1 1/2"
(38mm)
11/2"
(38mm)
Octagon
2" min.
(51mm) C
E
L
L
IN
2" min.
(51mm) C
E
L
L
IN
Notes
1.
Mount cell and flow chamber horizontally as shown above with flow exit “up to eliminate possible air gap around cell body.
2. If cell and flow chamber must be mounted vertically, attach a short length of tubing to flow exit as shown below and form
a trap to ensure filing of flow chamber, especially at low flow.
Figure 3-2 Dimension Drawing for 276127 Flow Housing