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Turtle Tough GP-X Digital Extreme pH Sensor

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Acid/Fluoride Resistant, Ammonia, Chlorine and Sulphide Gas Resistant, Slurry (High Abrasion) Resistant

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Product Description

GP-X Digital Extreme pH Sensor

SKU: TT-GP-pH-2010

The GP-X Digital Extreme is quite simply our most extreme pH sensor!

The GP-X Digital extreme comes standard with ALL our advanced options including high impact break resistant glass, ultra high temperature, dissolved gas and volatile organic solvent resistant, high HF acid resistant, brine and extreme dehydration resistance.

The sensor is equipped with fast response temperature compensation as standard to guarantee high calibration accuracy.  The Ultra thick RADEL body is extreme in both its chemical and physical resistance. An oversized KYNAR reference provides massive chemical resistance as well as extreme dehydration resistant properties.   Utilising our most advanced, proprietary break resistance glass the sensor is ideal for slurries and ultra-abrasive media as well as being capable of resisting acids or fluorides that may chemically attack the glass. For operators who are prone to bashing the sensor against hard surfaces or breaking the glass during vigorous cleaning or maintenance regimes, the ULTRA TOUGH break resistant glass is standard feature you must have.

Arguably one of the most significant advantages of the GP-X Digital Extreme pH Sensor is that it is only available in our digital smart sensor.  Our digital sensors have many advantages including:

  • Integrated smart digital board stores calibrations & transmitter configurations in the sensor
  • NEMA 6P Quick disconnect Corrosion Resistant Connector (no wiring required)
  • Up to 600 meters noise insensitive digital cable
  • True plug and play sensor with automatic loading of calibration values for hot-swap
  • Calibrate conveniently in lab or workshop and install quick-disconnect sensor in the field
  • Advanced auto read algorithm for reproducible & operator independent calibrations
  • Automatic recognition of 4.00, 6.86 , 7.00, 9.18 & 10.00 NIST traceable pH buffers with built-in correction for temperature induced changes to pH buffer value
  • Reliable readings in acidic or alkaline range with 1-point, 2-point or 3-point calibrations
  • Calibrate with sophisticated Windows software or any TT-MA pH Analyser
  • Entire transmitter configuration can be downloaded to sensor or uploaded from sensor to intelligent TT-MA Analyser
  • Stores last five offset (1-point), slope (2-point & 3-point) and temperature calibrations

The Turtle Tough GP-X Digital Extreme pH Sensor is ideal for applications such as industrial autoclaves, ammonium nitrate plants, sugar refining and extraction.  Any measurement where aggressive chemical cleaning is needed to remove fouling or low maintenance operation is required with minimal cleaning and recalibration

Not suitable for use in low conductivity, steam sterilization or steam type processes.

 Key Features

  • 6m cable, up to 600m optional.
  • RADEL Body, 1” twist lock x 1.25” MNPT
  • -5°C to 150°C (Optional 180°C)
  • Fast response TC for accurate calibration
  • Acid/Fluoride Resistant
  • Ammonia, Chlorine and Sulphide Gas Resistant
  • Slurry (High Abrasion) Resistant
  • High Capacity KYNAR Reference
  • Submersible Water proofing & Cable Sealing
  • Extreme Dehydration
  • Ultra Tough Break Resistant Glass
  • Digital smart sensor technology
    • 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

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 dataanalyser 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.

Additional Information

Additional Information



General Specifications


GP-X Digital Extreme pH Sensor

Part Number


pH Range

-0.5 to 14.5 pH

Temperature Range

-15 to 150°C


6.9 to 1035 kPa (1 to 150 psig)

Body Type

RADEL (Poly-Phenyl-Sulfone) with 1” Front End – 1¼” Back End MNPT

Junction Material

KYNAR (Poly-Vinylidene-Fluoride)


216mm Length, Maximum Diameter 42.2mm

Cable Length


Temperature Compensation



Not Fitted – Digital Sensor


Extreme Submersible


Snap Connector NEMA 6P

Special Features

Acid/Fluoride, Slurry (high abrasion), Sulphide, Organic and Solvent Resistant, High Impact Resistant, High Temperature Resistant, Accu-Temp Pt1000

pH Sensor Specifications

Measuring Glass Type

Hemispherical, Green Glass (MUGG)

Glass Dimensions

8.0mm (0.315”) Diameter

Initial Impedance

< 800 M Ohms @ 25°C

Sodium Ion Error

< 0.15 pH in Na⁺ solutions at pH 14.00

Acidic Errors

< 0.05 pH in HCl solutions at 0.00 pH

Reference System Specifications


Triple Junction

Reference Half Cell

Ag/AgCl, Saturated KCl

Primary & Secondary Junction

Porous Ceramic, Saturated KCl in Cross-linked polymer, interfaced to Tertiary Junction

Tertiary Junction

Solid-State Non-Porous Cross-Linked Polymer embedded in high capacity Kynar Support Matrix. Holds excess KCl assuring saturation at all temperatures for stability & long sensor service life.

Application Specifications

Recommended Applications

Industrial & mining autoclaves, ammonium nitrate plants, sugar refining and extraction. Any measurement where aggressive chemical cleaning is needed to remove fouling or low-maintenance operation is required with minimal cleaning and re-calibration. Not for use in low conductivity, steam sterilization or steam type processes.

Analyser / Interface

Turtle Tough TT-MAD Digital Analyser


Item should be kept at room temperature with closed protector cap, filled with storage solution in an upright position. Shelf life warranted for 12 months from the date of purchase.


12 Month Conditional Warranty

Application Aquaculture, Chemical Processing , Food & Dairy, Laboratory, Pulp & Paper, Soil & Fertilisers, Water & Wastewater, Mining Slurries, High Cyanide, Titanium Dioxide, Solvent Extraction
Duty Cycle Moderate, Heavy, Ultra


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