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DKK brand instrument: Immersion pH/ORP detector HC-7 series
DKK brand instrument: Immersion pH/ORP detector HC-7 series
Product details

Industrial immersion pH/ORP meters can be used for open waterways or tanks. Select the appropriate immersion sheath and electrode combination according to the usage conditions. The electrodes introduced in this article are all KCl supplied electrodes. For flow type installation, please refer to the relevant specifications of the flow type pH/ORP meter detector.


KCl supply electrode immersion detector


The immersion pH • ORP detector used in combination with KCl supplied electrodes contains a large amount of KCl reference solution inside. It can be used in different measurement conditions, from drainage treatment processes to industrial processes with harsh measurement conditions, and has a wide range of applications. And there are various liquid bonding materials and different types of electrodes to choose from. In addition, in order to maintain long-term stable reference points and ensure high reliability of measurements, there are various pressurized immersion detectors available for selection.


Standard specifications


● General specifications
Construction: Rainproof Construction (JIS C 0920)
Internal liquid volume: approximately 500mL (when the sheath is 1.0m long)
Water sample conditions: pressure... atmospheric pressure (unpressurized), Max 0.15MPa (pressurized), flow rate... below 2m/s


● Model classification

  No pressure applied Pressurized type characteristic
Used for drainage and control monitoring HC-763 type HC-753 type The sheath is made of semi transparent PP (polypropylene) material, which has heat resistance and drug resistance.
The length of the sheath gradually increases in increments of 0.5m, up to a maximum of 3m.
For general use, direct sunlight should be avoided as much as possible during installation.
HC-703C type HC-753C type The sheath is made of transparent PVC (polyvinyl chloride) material, which has high strength and is not easy to bend.
The length of the sheath gradually increases in increments of 0.5m, up to a maximum of 4m.
Used for online process control HC-703F type HC-753T type The sheath is made of semi transparent PVDF (polyvinylidene fluoride) material, which has good properties
Drug resistance, high temperature resistance, etc.
Good weather resistance, can be directly exposed to sunlight.
The length of the installation rod gradually increases in increments of 0.5m, up to a maximum of 4m.
HC-703T type HC-753T type The mounting rod is made of fluororesin material (semi transparent PFA) that is resistant to organic solvents. Sealed filling
Using perfluororubber that is resistant to organic solvents.
The length of the installation rod gradually increases in increments of 0.5m, up to a maximum of 3m.
Recommended conditions for pressurized installation: ① Installed in a sealed tank with internal pressure. ② In situations where water sample pollution is severe and salt bridges are prone to scaling. ③ In the case of low ion water determination (conductivity below 200 μ S/cm).


System composition diagram


● Specifications

  Generally used Drug resistance and high temperature resistance Resistant to organic solvents  
model Non pressurized type HC-763 HC-703C HC-703F HC-703T
PRESSURE TYPE HC-753 HC-753C HC-753F HC-753T
Liquid junction material essence PP PVC PVDF PFA
Protective tube PP PP PVDF PFA
Electrode sealing FPM FPM FPM FFKM
Sheath length 3.0m 4.0m 4.0m 3.0m
Heat resistant temperature (Note 1) 80℃ 60℃ 120℃ 80℃
Quality (Note 2) 1 kg 1 kg 1 kg 1.5kg
(Note 1) Heat resistance temperature of the material body of the liquid joint. The temperature range for use is determined by the electrode model.
(Note 2) The mass of KCl reference solution filled with a sheath length of 1m.


● Electrode

The electrode represented is a representative model used in conjunction with the sheath

  Model of electrode sheath PH electrode model ORP electrode model
Generally used High temperature use Resistant to fluoride acid Resistant to solvents High temperature and solvent resistant Platinum type (Pt) Alloy type (M)
Usage temperature -5~70℃ -5~95℃ -5~50℃ -5~70℃ -5~95℃ -5~70℃ -5~70℃  
No pressure applied HC-763 5600 5601 5605 —— —— 2600 2605
HC-703C 5600 —— 5605 —— —— 2600 2605
HC-703F —— 5601 —— 5602 5603 2601 ——
HC-703T —— —— —— 5602 5603 2602 ——
PRESSURE TYPE HC-753 5610 5611 5615 5612 —— 2610 2615
HC-753C 5610 —— 5615 —— —— 2610 2615
HC-753F —— 5611 —— 5612 5613 —— ——
HC-753T —— —— —— 5612 5613 —— ——
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