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Turtle Tough TT-HF-pH Acid Etching pH Sensor

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Acid/Fluoride, Slurry, Sulphide, and Organic Resistant, High HF Resistant

Availability: In stock

Exc. GST

Product Description

TT-HF-pH Acid Etching pH Sensor

SKU: TT-HF-pH-2109

The Turtle Tough Acid Etching pH Sensor has been specifically designed for acid fluoride etching solutions or fluoride wastewater treatment systems where low pH conditions may exist or strong acid cleaning is required to remove fouling from sensor.

Our proprietary glass sensing element is designed to resist etching from acid fluoride and high HF and is renown for its performance and longevity in these demanding applications.

The 3/4" x 1" MNPT Ryton body is highly resistant to chemical attack and is extremely cost effective.

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.

Key Features

  • 6m cable
  • RYTON Body, 3/4"x 1” MNPT
  • -5°C to 105°C
  • High HF Resistant
  • Acid/Fluoride Resistant
  • Ammonia, Chlorine and Sulphide Gas Resistant
  • High Capacity KYNAR Reference
  • Proprietary toughened 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

Additional Information

Additional Information




General Specifications


pH Sensor for Acid Etching

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”  Front End – 1”  Back End MNPT

Junction Material

KYNAR (Poly-Vinylidene-Fluoride)


216mm Length, Maximum Diameter 33.3mm

Cable Length


Temperature Compensation



Not Fitted


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


Hard Wired Tinned Leads for Sensor & TC

Special Features

Acid/Fluoride, Slurry, Sulphide, and Organic Resistant, High HF 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 Junction

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

Secondary Junction

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

Application Specifications

Recommended Applications

Specifically designed for Acid Etching.  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.

Analyser / Interface

All Turtle Tough pH Analysers


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 

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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