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Turtle Tough TT-GP-ORP-V Valve Retractable ORP Sensor

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

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Product Description

GP-V Valve Retractable ORP Sensor


The GP-V Valve Retractable ORP Sensor is uniquely designed to interface with our HOT TAP insertion valve retractable assembly, or sanitary assembly held in place by a tri-clover fitting.  Both methods allow for rapid insertion and removal from a process under 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.  Utilising our proprietary toughened glass the sensor is ideal for slurries and abrasive media as well as being capable of resisting acids or fluorides that may chemically attack the glass.

The GP-V Valve retractable ORP sensor is one of our most demanded configurations and meets the installation requirements of many applications. As such this sensor is available in many optional configurations 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.

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
  • RADEL Body, Double O-Ring front end, ¾” MNPT back end
  • -5°C to 105°C
  • 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
  • Acid/Fluoride Resistant
  • Slurry (High Abrasion) & Sulphide Resistant
  • High Capacity KYNAR Reference
  • Proprietary toughened glass
  • Sensor Holder and Retractable Valve assembly sold separately
  • Wide range of optional configurations
  • 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

Additional Information

Additional Information



General Specifications


GP-V Valve Retractable ORP Sensor

Part Number


mV Range

-2,000 to +2,000 mV

Temperature Range

-5 to 105°C


6.9 to 690 kPa (1 to 100 psig) with Retractable Assembly

6.9 to 1379 kPa (1 to 200 psig) with 1.25” MNPT Sensor Holder

Body Type

RADEL (Poly-Phenyl-Sulfone)  with Double O-Ring Front End – ¾” MNPT Back End

Junction Material

KYNAR (Poly-Vinylidene-Fluoride)


206.3mm Length, Maximum Diameter 26.7mm

Cable Length


Temperature Compensation



Not Fitted




Hard Wired Tinned Leads for Sensor & TC

Special Features

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

ORP Sensor Specifications

Measuring Glass Type

Platinum Ball in Low Profile Configuration

Glass Dimensions

5.0mm (0.197”) Diameter

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 gross excess KCl assuring saturation at all temps for stability & long sensor service life.

Application Specifications

Recommended Applications

Any process media where the redox (ORP) potential is monitored or controlled. Can be combined with other sensor options available for pH sensors such as high temperature resistant, slurry & viscous material resistant, acid fluoride & HF resistant, pulp and paper resistant, sulfide resistant, dissolved gas and organic solvent resistant or saturated brine resistant.

Analyser / Interface

All Turtle Tough ORP 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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