Specification; Standard Specifications - YOKOGAWA PH8ERP User Manual

1.

Specification

The Model PH8ERP KCl Refillable pH Sensor features maintainability which involves no KCl
solution coming out of the liquid junction.
This sensor can be mounted on either an PH8HF flow-through holder or an PH8HS submersion
holder. The sensor can be submerged up to a maximum of 3 meters, depending on the
specification.
1.1

Standard Specifications

Measurement:
Measurement principle: Glass electrode method
Measuring range:
Installation:
Note: If any of the following solutions are measured, install the sensor either in a flow-through or submersion holder.
• A strong acid solution is to be measured (e.g., aqua regia, chromic acid, hypochlorous acid or perchloric acid, etc.).
• The solution contains corrosive gases (e.g., ammomia, chlorine, hydrogen sulfide, etc).
• The solution contains a small percentage of organic solvent or oil.
Solution temperature: -5 to 80°C (refer to Table 1)
Table 1. Process Temperature Range
Holder Type
Guide-pipe
(PH8HG) (*2)
Submersion (PH8HS)
Flow-through (PH8HF)
Well Bucket (HH350G)
(*2)
Float
(PB350G, PB360G) (*2)
Note: PVC: Rigid Polyvinyl, PP: Polypropylene, SS: Stainless Steel
*1: Stainless steel holder and Stainless steel adapter should be used when the pH value of the solution is pH3 or more acidic.
*2 Cannot be used with pH sensors connected to Variopin connecter.
Temperature detection element: Pt1000
Solution pressure:
Table 2. Process Pressure Range
Holder
Submersion
Guide-pipe
Suspension Float
Flow-through (*1)
*1: For flow-through types, refer also to the solution temperature and pressure diagram of Holder IM.
Operating solution depth:
Solution flow velocity:
Solution flow rate:
Hydrogen ion concentration (pH) of a solution
pH 2 to 12
Mounting in PH8HS submersion holder
Mounting in PH8HG guide-pipe holder
Mounting in PH8HF flow-through holder
Holder
Cleaner
Material
PVC None
PP None
None
PP, SS (*1)
Provided
None
SS (*1)
Provided
PP, SS (*1) None
under atmospheric pressure to 50 kPa, when using a holder,
refer to Table 2.
Process Pressure Range
Atmospheric pressure (Submersion depth: Max. 3 m)
Atmospheric pressure
(Submersion depth: Max.3 m)
Atmospheric pressure to 50 kPa
3 m water pressure (max.) under atmospheric pressure
2 m/s max.
3 to 11 L/min
(when the sensor is installed in a flow-through type holder).
< 1. Specification >
Solution
Solution
Temperature
pH Range
(°C)
-5 to 50
-5 to 80
-5 to 80
2 to 12
-5 to 80
-5 to 50
IM 12B7K1-02E
1-1
11th Edition : Dec.14,2018-00