Yokogawa FS20 Fittings for pH and ORP - Manual (Page 18)

IM 12B6K1-01E-E
16
Specifications
Materials
Nozzle
: Hastelloy
O-rings : EPDM rubber
Mounting set : Stainless steel
Tubing
: 1/4” (OD Ø) Nylon tubing
Process cond. : Max. 1 MPa (10 bar) at 100 ºC
Mounting
K1547PA
: / HCN2, 2-hole flow-, insertion fitting (PH20)
K1547PA : / HCN3, 3-hole flow-, insertion-, immersion fitting
K1547PB : / HCN4, 4-hole flow-, insertion-, immersion fitting
K1547PJ : / HCNF, back-end mounting on FU20/PH20
4-5. Salt bridge
(Model SB20-VP, VC and VS)
This reference electrode/salt bridge
combination allows pH and ORP(Redox)
measurement with the normal electrodes in
those cases when:
a. excessive contamination of the ceramic
flow diaphragm is expected
- the flow of the reference liquid
through the diaphragm is increased
by pressurising the container.
Consequently, the contamination rate will
decrease.
b. the process to be measured cannot stand
the contamination with KCl
- the salt bridge can be filled with several
electrolytes.
c. measurements have to be performed at
pressures up to 10 bar and temperatures
up to 100 °C
- the container with reference liquid can
be pressurised.
FLOW TUBE (A)
Material
: glass
Flow diaphragm : ceramic, PTFE or sleeve
Connector
: Ryton R4
TUBING (B)
Material
: nylon
Diameter : 1/4” o.d.
Length : 2 mtr.
CONTAINER (C)
Container
: PVC, PVC (transparent)
Electrode
mounting set : Ryton R4
“O” ring
: silicone
Reference
Electrode
C
B
Ш 75
65
166
Ш 75
Ш 1/4”
A
Ш 17
Ш 12
120
39
Figure 4-8
Figure 4-9