YOKOGAWA PH72-21-E-AA, User Manual

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IM 12B03D02-01E
1-7
1. Outline
F010602.EPS
KCl replenish-free type combination pH sensor
Sensor body
Sensor grip
Sensor grip
Fill hole for KCl filling solution
Fill hole plug
Glass electrode
(Platinum electrode)
Glass electrode
Sensor cable
Waterproof cover
Connector
Name plate
KCl refillable type combination pH sensor,
ORP sensor
Wetting cap
Wetting cap
Sensor body
Sensor cable
Waterproof
cover
Connector
Name plate
Protective cover
Liquid
junction
Temperature element
Liquid junction
Temperature element
Prevents water ingress
that may cause
insulation failure.
Measures pH
values.
Removed only
during cleaning.
Measures solution temperature
and compensates for temperature
effect on pH electrode.
Used to prevent glass electrode from dying out. During storage this cap
with cotton wad moistened with water should be attached to electrode tip.
Connection to pH/ORP
meter.
Plastic body that can withstand
temperature up to 80
°
C.
Provides electrical contact
between internal reference
electrode and sample solution.
3.3 mol/l KCl solution is used.
Prevents filling solution from
leaking from fill hole during
storage. Always unplugged
during measurement.
Protective cover
*1
*1
*1
PH72 - 21 - - AA
PH72 - 23 - - AA PH72 - 11 - - AA
PH72 - 13 - - AA
PH72 - 41 - - AA
PH72 - 43 - - AA
PH72 - 51 - - AA
( PH72SN-11-AA,
PH72SN-13-AA )
*1
( PH72SN-21-AA,
PH72SN-23-AA,
OR72SN-41-AA,
OR72SN-43-AA )
*1: On the name plate of sensor, Model and Suffix Code of sensor itself (PH72SN- -AA or OR72SN- -AA) is indicated. (See Section 1.6.)