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Turtle Tough GP-XI Portable pH Meter Sensor

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Product Description

GP-XI Portable pH Meter Sensor

SKU: TT-GP-pH-2011


General Specifications


GP-XI Portable Meter pH Sensor

Part Number


pH Range

0 to 14 pH

Temperature Range

-5 to 105°C


6.9 to 690 kPa (1 to 100 psig)

Body Type

RYTON (Poly-Phenylene-Sulfone) with ¾” MNPT Front & Back End

Junction Material

KYNAR (Poly-Vinylidene-Fluoride)


203.2mm Length, Maximum Diameter 26.7mm

Cable Length


Temperature Compensation



Not Fitted


Immersible, Submersible if threaded on sealed immersion rod with sufficient sealing tape


BNC Connector and Banana Plugs

Special Features

Acid/Fluoride, Slurry and Sulphide Resistant

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


Double Junction

Reference Half Cell

Ag/AgCl, Saturated KCl

Primary & Secondary Junction

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

Tertiary Junction

Compact Style Solid-State Non-Porous Cross-Linked Polymer embedded in Kynar Support Matrix. Holds excess KCl assuring saturation at all temperatures for stability & long sensor service life in application where little or no maintenance will be performed.

Application Specifications

Recommended Applications

Any process media contaning 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.

Analyser / Interface

Turtle Tough pHP Portable Meter


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

Please see 

Additional Information

Additional Information

Specifications No
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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