Turtle Tough pH Sensor for Uranium


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SKU: TT-Uranium-pH-2116.

Turtle Tough pH Sensor for Uranium

  • 6m cable
  • RADEL with Double O-Ring Front End – ¾” MNPT Back End
  • Triple Junction
  • -5°C to 105°C (-35° to 150°C Optional)
  • Hot-tap insertion valve retractable assembly (up to 150 psi); or
  • Sanitary assembly and tri clover fitting (up to 100 psi)
  • Fast Response TC for calibration accuracy
  • Teflon Silicon Sealing (optional)
  • Acid/Fluoride Resistant
  • Sulphide Resistant
  • Slurry Resistant (High Abrasion)
  • High Capacity KYNAR Reference
  • Proprietary toughened glass (Ultra Tough optional)
  • Sensor holder and valve retractable assembly sold separately
  • 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

Uranium pH Sensor

The TT-Uranium-pH sensor has evolved over a period of more than a decade in one of Australia's largest Uranium Mines.  Continuous improvement of the design has seen the sensor outlast and outperform ALL competitors.  In this most recent design the sensor has been given a double thickness RADEL body and Ultra Tough Glass option (non-standard) to withstand high velocity slurries and harsh cleaning regimes and special sealants to resist solvent and dissolved gases attacks.  The all purpose body design allows this sensor to be used for immersion, submersion and hot-tap (valve retractable) applications. This sensor continues to provide unparalleled performance and service life in this demanding application earning it the respected title of being the best in the industry.

The principle application here is leaching with sulphuric acid, which requires precise electrochemical control of a number of reagents. Accordingly our fast response TC is utilised to improve calibration accuracy and sensor response during calibration. It is also ideally position should the sensor be used in a hot-tap configuration.

Our retractable pH Sensor is uniquely designed to interface with our hot-tap insertion valve retractable assembly.  For this application, the modified hot-tap assembly includes a cross-flow dual port purge flush assembly allowing the sensor to be flushed with hot water on removal.  This allows for safe and clean removal from the process dual-port-purge-flushunder pressure.

Our hot-tap assemblies are a common feature in industries where direct access to the process is required inline or in-tank without interruption to service.  The RADEL body plastics provide superior resilience to physical impact and high abrasion, while the high capacity KYNAR reference provides both chemical resistance and temperate resistance to 105°C with a high temperature option up to 150°C.  Utilising our proprietary toughened glass the sensor is ideal for abrasive media as well as being capable of resisting acids or fluorides that may chemically attack the glass.

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 the Uranium industry.  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.