Sensor Holders for pH/ORP, DO and MLSS Analyzers

Yokogawa provides several types of holders, for which cleaners can be added, allowing customers to build reliable and easy-to-maintain measuring systems by selecting the right holders and cleaners for the conditions of applications.

The submersion type holders PH8HS, PH8HSF and DOX8HS are widely used with process analyzers and can be directly immersed in reaction tanks or measuring baths for measurement.

The flow-through type holders PH8HF, PH8HFF and FH350G can be set up at a point along pipelines to measure solvent in production lines or wastewater pipelines.

The suspension holder HH350G has a guide pipe along which just a fitting mounted electrode can be separately pulled up with a chain, thus increasing the ease of maintenance.

The inclined float holder, PB350G is equipped with a float that moves up and down in accordance with the fluctuating water surface level. Since the float has been designed to accommodate an electrode without extreme projections and depressions, the amount of foreign matter building up around the float or electrode decreases, and it becomes harder for dirt to accumulate, thus enabling continuous stable measurement over a long period.

We have provided the vertical float holder, PB360G, for cases when the installation space for a float holder is limited or the measuring bath is covered.

Submersion Type Holders: PH8HS, PH8HSF and DOX8HS

  • Available in stainless steel or polypropylene.
  • Optional jet- or ultrasonic-cleaning device (unavailable for DOX8HS).
  • Optional flange fitting for PH8HS.
  • Skewed mounting for DOX8HS to prevent influence from bubbles.

Flow-Through Type Holders: PH8HF, PH8HFF and FH350G

  • Available in stainless steel or polypropylene.
  • Optional jet- or ultrasonic-cleaning device (unavailable for FH350G).
  • Allows direct mounting to the pipeline.

Suspension Holder: HH350G

  • Allows the electrode to be pulled up separately.
  • Easy maintenance.
  • Optional jet-cleaning device.

Float Ball Holders: PB350G and PB360G

  • Continuous stable measurement without effect from fluctuations in fluid level.
  • Reduces maintenance frequency.
  • Easy-to-maintain.
  • Vertical type is also available for limited installation space.

Sensor Holders

1. Guide-Pipe PH8HG

Applicable sensors General pH Sensor PH8ERP, PH8EFP
General ORP Sensor OR8ERG, OR8EFG
Dissolved Oxygen Sensor DO30G
MLSS Sensor SS300G
Mounting 2-inch pipe mounting vertical or horizontal
Material
Holder Polypropylene or PVC
Mounting bracket Galvanized iron or stainless steel (equivalent to 304SS)
Measuring temperature 0 to 50℃ (PVC), 0 to 80℃ (Polypropylene)
Weight
Holder Approx. 2 kg
Mounting bracket Approx. 1 kg/set

 

2-A. Submersion Type Holder PH8HS

Applicable sensors General pH Sensor PH8ERP, PH8EFP, PH8ERG, PH8EFG
Special pH Sensor HA405, DPA405, HF405
General ORP Sensor OR8ERG, OR8EFG
Special ORP Sensor HA485, DPA485
Mounting 2-inch pipe mounting vertical or horizontal with 1 or 2 set of mounting hardware
Cleaning method Jet cleaning, brush cleaning or ultrasonic cleaning
Material
Holder Polypropylene or stainless steel (equivalent to 316SS)
Mounting bracket Galvanized iron or stainless steel (equivalent to 304SS)
Weight
Holder Approx. 0.5 to 2.2 kg (polypropylene),Approx. 1.5 to 11.5 kg (stainless steel)
Mounting bracket Approx. 1 kg/set
Measuring temperature
No Cleaning -5 to 100℃
With Cleaning -5 to 80℃
Measuring flow speed 2m/s or less
Measuring pressure Submersion depth Max. 3m

 

2-B. Submersion Type Holder (Explosionproof Type) PH8HSF

Applicable sensors General pH Sensor PH8ERP, PH8EFP, PH8ERG, PH8EFG
General ORP Sensor OR8ERG, OR8EFG
Mounting 2-inch pipe mounting vertical or horizontal with 1 or 2 set of mounting hardware
Cleaning method Ultrasonic cleaning
Material
Holder Polypropylene or stainless steel(equivalent to 316SS)
Mounting bracket Galvanized iron or stainless steel (equivalent to 304SS)
Construction JIS flameproof type (for d2G4 gas)
Weight
Holder Approx. 0.5 to 2.2 kg (polypropylene), Approx. 1.5 to 11.5 kg (stainless steel)
Mounting bracket Approx. 1 kg/set
Measuring temperature -5 to 80℃
Measuring flow speed 2m/s or less
Measuring pressure Submersion depth Max. 3m

 

2-C. Submersion Type Holder DOX8HS

Applicable sensors Dissolved Oxygen Sensor DO30G
MLSS Sensor SS300G
Mounting 2-inch pipe mounting vertical or horizontal, with 1 or 2 set of mounting hardware
Cleaning method Water or air jet cleaning
Material
Holder Polypropylene or stainless steel equivalent to 316SS)
Mounting bracket Stainless steel (equivalent to 316SS) or galvanized iron
Weight
Holder Approx. 0.5 to 1.5 kg (polypropylene), Approx. 1.5 to 11.5 kg (stainless steel)
Mounting bracket Approx. 1 kg/set
Measuring temperature 0 to 80℃
Measuring flow speed 2 m/s or less.

 

3-A. Flow-Through Type Holder PH8HF

Applicable sensors General pH Sensor PH8ERP, PH8EFP, PH8ERG, PH8EFG
Special pH Sensor HA405, DPA405, HF405
General ORP Sensor OR8ERG, OR8EFG
Special ORP Sensor HA485, DPA485
Mounting 2-inch pipe mounting vertical or horizontal, with 1 set of mounting hard hardware
Cleaning method Jet cleaning, brush cleaning or ultrasonic cleaning
Material
Holder Polypropylene or stainless steel(equivalent to 316SS)
Mounting bracket Stainless steel (equivalent to 304SS)
Weight
Holder Approx. 0.5 to 1.5 kg (polypropylene), Approx. 1.5 to 11.5 kg (stainless steel)
Mounting bracket Approx. 0.5 kg
Measuring Temperature
No Cleaning -5 to 80℃ (polypropylene)
-5 to 105℃ (stainless steel)
With Cleaning -5 to 80℃
Measuring flow rate 3 to 11 l/min.
Measuring pressure Atmospheric pressure to 500kPa.

 

3-B. Flow-Through Type Holder (Explosionproof Type) PH8HFF

Applicable sensors General pH Sensor PH8ERP, PH8EFP, PH8ERG, PH8EFG
General ORP Sensor OR8ERG, OR8EFG
Mounting 2-inch pipe mounting vertical or horizontal, with 1 set of mounting hardware
Cleaning method Ultrasonic cleaning
Material
Holder Polypropylene or stainless steel(equivalent to 316SS)
Mounting bracket Stainless steel (equivalent to 304SS)
Construction JIS flameproof type (for d2G4 gas)
Cable entrance port of terminal box; G 3/4
Weight
Holder Approx. 3 to 3.2 kg (polypropylene),Approx. 5.6 to 7.6 kg (stainless steel)
Mounting bracket Approx. 0.5 kg
Measuring temperature -5 to 80℃
Measuring flow rate 3 to 11 l/min
Measuring pressure Atmospheric pressure to 500kPa

 

3-C. Flow-Through Type Holder FH350G

Applicable sensor MLSS Sensor SS300G
Mounting 2-inch pipe mounting vertical or horizontal
Cleaning method Water or air jet cleaning
Material
Holder Polypropylene or stainless steel(equivalent to 316SS)
Mounting bracket Stainless steel (equivalent to 304SS)
Weight
Holder Approx. 0.4 to 5 kg
Mounting bracket Approx. 0.5 kgt
Measuring temperature 0 to 80℃
Measuring flow rate 6 to 11 l/min

 

4. Suspension Holder HH350G

Applicable sensors General pH Sensor PH8ERP, PH8EFP, PH8ERG, PH8EFG
General ORP Sensor OR8ERG, OR8EFG
Dissolved Oxygen Sensor DO30G
MLSS Sensor SS300G
Mounting 2-inch pipe mounting vertical.
Cleaning method Water or air jet cleaning
Material
Holder Polypropylene and stainless steel (equivalent to 304SS)
Mounting bracket Stainless steel (equivalent to 304SS)
Weight 6.4 to 13.8 kg
Measuring temperature 0 to 80℃
Measuring flow speed 1 m/s or less

 

5. Angled Floating Ball Holder PB350G

Applicable sensors General pH Sensor PH8ERP, PH8EFP, PH8ERG, PH8EFG
General ORP Sensor OR8ERG, OR8EFG
Dissolved Oxygen Sensor DO30G
MLSS Sensor SS300G
Pipe length 2.5m
Mounting 2-inch pipe horizontal mounting or horizontal plane mounting
Material
Holder ABS resin, Nitrile rubber (NBR), brass, and PVC
Mounting bracket Stainless steel (equivalent to 304SS)
Weight
Holder(incl.arm) Approx. 4.8 kg to Approx. 5.4 kg
Mounting bracket Approx. 5 kg
Measuring temperature 0 to 50℃
Measuring flow speed 20 to 100 cm/s

 

6. Vertical Floating Ball Holder PB360G

Applicable sensors General pH Sensor PH8ERP, PH8EFP, PH8ERG, PH8EFG
General ORP Sensor OR8ERG, OR8EFG
Dissolved Oxygen Sensor DO30G
MLSS Sensor SS300G
Mounting 2-inch pipe vertical mounting
Material
Holder ABS resin, brass, and rigid PVC
Mounting bracket Stainless steel (equivalent to 304SS)
Weight
Holder, guide-pipe, and arm Approx. 7.4 kg to Approx. 9.6 kg
Mounting bracket including assist bracket and U-bolt assembly Approx. 5 kg
Measuring temperature 0 to 50℃
Measuring flow speed 20 to 100 cm/s
Overview:

The lifetime of a pH sensor has a significant impact on the overall annual costs of a pH measuring loop. Optimizing four key factors will decrease these costs and optimize process control and overall plant efficiency.

Instruction Manuals
General Specifications
Technical Information
Drawings

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