pH Sensor for Titanium Dioxide


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SKU: TT-TiO2-pH-2104.

pH Sensor for Titanium Dioxide

  • 6m cable
  • RADEL with ¾” Front End – 1” Back End MNPT
  • -5°C to 105°C
  • Fouling resistant
  • Slurry Resistant
  • Acid/Fluoride Resistant
  • Ammonia, Chlorine & Sulphide Resistant
  • High Capacity KYNAR Reference
  • Proprietary toughened glass
  • Digital smart sensor technology (optional)
    • No hard wiring – plug-n-play connectivity
    • Sensor stores calibration data, analyser configuration and sensor history
    • Hot-swap for quick sensor change-out
    • No interaction with analyser – sensor data auto uploads
  • Description
  • Downloads
  • Application & Use
  • Case Studies

TT-TiO2-pH Titanium Dioxide pH Sensor

The Turtle Tough Titanium Dioxide pH Sensor has been the result of more than 20 years of experience and persistence in this physically tough environment.

A characteristic common to all Turtle Tough pH and ORP sensors is a massive solid state reference area which is ideally suited to this application as a physical deterrent to fouling. The unique construction and material composition allows it to withstand harsh cleaning. Any caking or fouling of the reference can be overcome by soaking in high strength acid or by physical removal such as scrubbing or even scrapping with a blade. This won’t damage the sensor, but instead will reveal fresh reference area, greatly extending service life. Our proprietary glass is extremely tough and designed to withstand the harsh abrasion of the environment and cleaning regime. Chemical resistance is also a major feature of this sensor, particularly against sulphide poisoning.

Quite simply, the TT-TiO2-pH Sensor will provide the best service life for Titanium Dioxide applications.

Digital Smart Sensor Technology (DSST)

This sensor is available with our digital smart sensor technology. This plug and play sensor has a quick connect fitting, eliminating the need for hard wiring to the analyser. On-board sensor memory allows the storage of calibration data, analyser configurations and sensor service history. This allows the sensor to be conveniently maintained and calibrated off-site or in the laboratory and pre-programmed with calibration data and analyser configurations.  This stored information automatically uploads to the analyser upon connection and eliminates the need for any interaction with the analyser, greatly simplifying the change-out of sensors. A service log stored on the sensors is ideal for maintenance and quality assurance records.

Applications

Specifically designed for Titanium Dioxide.  Any process media containing free sulfide species such as hydrogen sulfide gas (H2S), hydrogen sulfide (HS-) or sulfide ions (S2-). Any measurement where aggressive chemical cleaning is needed to remove fouling or low-maintenance operation is required with minimal cleaning and re-calibration.

Application Difficulty Index: 9/10

This sensor is design for difficult applications with a difficulty index up to 9/10

Maintenance FREE

Turtle Tough pH and ORP sensors are a completely sealed assembly and are sealed for life.  This provides extreme process resistance as well as a totally maintenance free sensor which greatly increases sensor life and reduces labour costs.  A Turtle Tough sensor does not contain any O-rings, washers, gaskets, or serviceable components/assemblies. It does not require refreshing or refilling of electrolyte. The only requirement is regular cleaning in accordance with our recommended cleaning schedule for your application. Regular cleaning will prolong the life of your sensor and ensure hassle free operation.

Recommended Cleaning Schedule

The recommended cleaning interval is based upon the difficulty index for your application.

Recommended Cleaning Schedule

Application Difficulty Rating

Cleaning Schedule

1-3

Monthly

4-6

Fortnightly

6-7

Weekly

8-9

Twice (2x) per week

10

Daily

If a Turtle Tough pH/ORP sensor response slows down, it is most likely the result of a fouled  reference or dirty coated glass.  Cleaning should be performed as required and will vary across  applications.  See cleaning instructions.

Storage

The standard shelf life for all Turtle Tough pH and ORP sensors is one year from the date of shipment. Sensors stored longer than this period may still be functional but are no longer under warranty. Sensors should be stored in a cool, dry location with the sensor tip (sensing element) oriented toward the ground.  All sensors come standard with a conditioning solution in the cap. This conditioning solution is 50% pH 4 buffer and 50% saturated potassium chloride (mixed by volume). The sensor cap should be kept tightly affixed to the sensor body and sealed with common PVC tape when the sensor is not in use. Sensors that are to be returned for shelf life warranty claim must have the original sensor cap and conditioning solution intact to be eligible for warranty replacement.

Avoiding Thermal Shock

For high temperature applications where process liquid exceeds 70°C you will prolong the life of the sensor by avoiding thermal shock. Thermal shock occurs when you rapidly change the temperature of the sensor from hot to cold or vice versa. This rapid expansion/contraction of sensor components can damage internal elements and cause micro-cracking that will accelerate the rate of deterioration. In extreme cases it will crack the sensing element causing a total failure.  To avoid this sensor should be heated or cooled slowly during removal/insertion and cleaning and calibration processes. Consult your Turtle Tough representative for techniques to avoid thermal shock.

Conditioning After Calibration

After the sensor has been cleaned, it must be thoroughly rinsed with deionised water to remove any residual cleaning reagents. The sensor can then be soaked in pH 4 buffer to recondition the pH and reference elements. Some sensors will also require conditioning in saturated potassium chloride if the reference junction has been depleted of the ions in the solid state conductive polymer (typical for clean water applications). Condition the sensor in saturated potassium chloride and/or pH 4 buffer for whatever period of time is required to achieve optimal calibration results.

Please refer to your sensor manual for correct installation, maintenance and use.

Kwinana, Western Australia, 2000.

This titanium dioxide plant converts dull black synthetic rutile into pure white titanium dioxide via chlorinators that produce titanium tetrachloride. Dissolved chlorine gases were deteriorating sensors so fast that calibrations were attempted twice a day, with a new sensors being used every 1-2 days.

A special glass formulation was required for this application to provide chlorine and dissolved gas resistance. The high impedance nature of the glass required a preamplifier and fortunately the existing Rosemount Analysers were able to accomodate this.

The resulting sensor was physically tougher than its predecessor and could withstand more vigorous cleaning, further extending service life. The Turtle Tough sensor provided much greater accuracy and was able to survive for months at a time, providng as much as a 12 times gain in life expectancy. Titanium Dioxide