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Turtle Tough TT-FR-pH Rosemount Compatible pH Sensor

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Acid/Fluoride, Slurry and Sulphide Resistant

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Product Description

TT-FR-pH Rosemount Compatible pH Sensor

SKU: TT-FR-pH-2202

The TT-FR-pH Fisher Rosemount Compatible pH Sensor is without doubt our most supplied sensor.  In the early years of Turtle Tough when we didn't have our own analyser hardware we forged our reputation on building tough pH sensors to mate up with Fisher Rosemount Analysers.   Rosemount Analysers are legendary and rightly so as they've built  a reputation as having some of the best hardware in the industry. Rosemount analysers such as the 1056, 1181, 2081, 3081, 5081, XMT's (just to mentioned a few) supported some of our toughest features which few other vendors could. As a results, some of the most resilient sensors we've designed are compatible with Rosemount hardware, and virtually all our application specific sensors can be designed to interface with these analysers.

Our replacement OEM sensor for the Rosemount product is designed as an affordable all-rounder and can be special ordered with nearly any option.  The standard double junction sensor is sulphide resistant and can be special ordered in triple junction.  The affordable and highly chemical resistant RYTON body plastic is standard, however for added physical strength and abrasion resistant RADEL can be optioned.  This OEM replacement is not simply a substitute.  It will outlast and outperform the OEM product several times over. 20 years of evidence guarantees it.

The standard sensor is without preamplifier and supports a 6 meter cable run.  For greater distances the sensor can be fitted with an integral preamplifier that supports cable runs of up 100 meters.   With or without preamplifier, tinned leads are supplied in the OEM wiring conventions for easy connectivity to any analyser.

Extreme dehydration, slurry/abrasion resistance, high HF are all options supported by preamplifier versions of this sensor.

The result is a sensor that will in all cases will outperform the OEM because of our application specific approach to improved sensor performance.  There are many good reasons why some of the biggest names in the industry are using a Turtle Tough sensor on a Rosemount Analyser, but the main reason is reliability and a lower cost of ownership.

Key Features

  • 6m cable
  • RYTON Body, 3/4”x 1” MNPT
  • -5°C to 105°C
  • Immersion or Submersible (optional)
  • Double Junction
  • Acid/Fluoride Resistant
  • Ammonia, Chlorine and Sulphide Gas Resistant
  • High Capacity KYNAR Reference
  • Proprietary toughened glass
  • Options:
    • High Impact, Solvent Resistant, Extreme Dehydration
    • Integrated pre-amplifier required for certain models

Additional Information

Additional Information



General Specifications


Rosemount Compatible pH Sensor

Part Number


pH Range

0 to 14 pH

Temperature Range

-5 to 105°C


6.9 to 690 kPa absolute (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 – Optional


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


Hard Wired Tinned Leads for Sensor & TC

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 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

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

Compatible with most Rosemount analogue 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

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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