SMART-5 pH & ORP Direct Smart Sensor – High Temp

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SMART-5 pH & ORP Direct Smart Sensor – High Temp

  • Designed specifically for high temperatures
    • Abrasion resistant
    • High velocity solids resistant
  • 6m cable
  • RADEL with ?? Front End ? 1? MNPT Back End MNPT
  • -5?C to 105?C
  • Submersible Water proofing & Cable Sealing
  • Acid/Fluoride Resistant
  • Ammonia, Chlorine and Sulphide Gas Resistant
  • High Capacity KYNAR Reference
  • Proprietary tough glass
    • Virtually unbreakable
  • Quick connect?plugs – eliminate hard-wiring of sensors and allow for instant hot-swap
  • Smart Sensor Technology
    • Direct MODBUS RTU output from sensor
      • Connects to wide array of platforms
    • Reduce Overhead & Installation Costs – No need to install expensive analysers
    • No hard wiring ??plug-n-play connectivity
    • Smart Sensor stores calibration data
    • Smart Calibrator ? use one device to calibrate and interface with ALL sensors
    • Hot-swap for quick sensor change-out
  • Description
  • Downloads
  • Application & Use
  • Case Studies

SMART-5 pH Direct Smart Sensor

The Turtle Tough SMART-5 direct smart sensor is one tough sensor. Designed specifically to resist high velocity solids and high levels of abrasion this sensor provides unprecedented periods of survival in applications where most of our competitors literally disintegrate.

The Turtle Tough SMART-5 direct smart sensor is extremely versatile for a variety of installation methods. By utilizing?a double thickness 3/4" x 1" RADEL body, it is suitable for both immersion, submersion and valve retractable installation types. ?The RADEL body material offers excellent resistance to abrasion at an economical price, while a fast response TC is built in close to the sensing element for superior calibration accuracy in all installation types.

The real secret to this sensor is the glass. Known for its fragility, the glass sensing element is often the weakest link in sensors having to cope with high velocity solids and slurry abrasion.? Our unique and proprietary glass formulation is arguably the strongest pH glass bulb in the world and is capable of withstanding direct impact from high velocity slurries. We like to think it is 'virtually' unbreakable for it's intended use.

Fouling is another common problem with many brands of sensors, however our open geometry, coating resistant materials and our preference for high velocity (to keep the sensor clean) maintain optimal performance of the sensor within the sensibilities of a standard cleaning regime.

Direct Smart Sensor Technology (DSS-MO)

Lightweight & Portable
Calibrate and configure at any location retaining all values

Portable 9V battery powered communicator to calibrate & configure DSS-MO smart digital sensors with MODBUS RTU output at any location desired while still retaining all values stored including the last calibration performed

Six values stored in non-volatile EEPROM memory
Complete installation portability & hot-swap use with the following values stored:
  • Offset calibration for temperature pH or ORP sensor
  • Offset calibration for pH or ORP sensor
  • Acidic slope for pH sensor used when reading < pH 7
  • Alkaline slope for pH sensor used when reading > pH 7
  • Factory set Sensor Serial & Item Number for traceability
  • The max & min ?C in service & total time in use (energized)
Intelligent Software

The intelligent software on DSS-MO communicator auto-detects sensor type connected & loads the appropriate options such that one communicator can interface all possible types of DSS-MO smart digital MODBUS sensors

Access to REAL-TIME DATA in no time.

With the MODBUS RTU you will have access to ALL information that is available from the communicator:

  • Real-time data acquisition of measured process parameter (pH or ORP)
  • Temperature
  • All calibrations & diagnostic details about the installed DSS-MO smart digital sensor for intelligent remote management & troubleshooting capabilities
Quick disconnect cables to 1,000 meters
  • NEMA 6P & IP67 rated waterproof
  • HiQ4M & HiQ4F snap connectors for rugged field use

Offset calibrations available for ORP measurement and temperature

Input Data ranges and max resolution for pH & ORP measurements
  • pH range of -2 to 16 with 0.001pH max resolution
  • ORP range of ?1000 or ?2000mV; 0.1mV max resolution
  • Temperature range of -40 to 210 ?C; 0.1?C max resolution
3 Calibration points for optimal accuracy at any pH

Perform 1-point offset anywhere in the range. Slope calibrations are automatically assigned for acidic (-2 to 7) or alkaline (7 to 16) pH ranges yielding a 3-point point overall calibration scheme with a dual slope for optimal accuracy at any pH (can be very important for batch systems).

Automatic Temperature Compensation

(ATC) for pH measurement

  • Integral RS-485 MODBUS RTU interfaces all-modern PLC controllers & data acquisition systems
  • Easy management of field installations without the cost of a mating transmitter
  • Ideal for locations where a local display is not necessary or possible due to installation limitations
  • Intelligent management of sensor calibrations and service life-cycle
  • Efficient commissioning & maintenance
  • Simple and fully portable installation scheme from the shop to the field site location
  • Optimal maintenance planning Keep record of the calibration ?Days in Use?
  • Reliable operation even in extreme and noisy process environments
  • No degradation in digital output even with very long cable runs up to max of 1,000m
  • No loss of signal quality
  • Bridging connections & modifying installations easily without loss of signal quality with NEMA 6P & IP67 rated quick disconnect waterproof and corrosion-resistant dual snap connector
  • Low-cost snap digital extension cables facilitate consolidation of very many DSS-MO sensors outputs into one panel enclosure where very many remote field installations can all be conveniently all viewed at once
  • Identifies type of sensor connected & auto loads correct features
  • There exists no possibility of accidentally using the wrong set of options or settings
  • All Extension cables for DSS-MO sensors are inter-compatible
  • Uniform extension cables minimize stocking. Separate field installation guide details available options to commission & exchange sensors
  • ALL Industrial Series TURTLE TOUGH pH Sensors for Tough Inline, Immersion or Submersible Use
  • ALL Application Specific Series TURTLE TOUGH pH Sensors
  • The new rugged low-profile impact & break resistant parabolic pH glass element optimized for use in slurries & high viscosity applications is available in the DSS-MO type configuration
  • The extreme dehydration resistant style reference technology that allows for prolonged exposure to dry conditions and intermittent wet & dry use are also available in the DSS-MO type configuration


Specifically designed for abrasive slurry & high-viscosity inline, immersion or submersible process installations. Industrial, chemical, food & beverage, semiconductor, pharmaceutical & wastewater. Any measurement where aggressive chemical cleaning is needed to remove fouling or low-maintenance operation is required with minimal cleaning and re-calibration.

Application Difficulty Index: xx/10

This sensor is design for difficult applications with a difficulty index?up to xx/10

Maintenance FREE

Turtle Tough pH and ORP sensors are a completely sealed assembly and are sealed for life.? This provides extreme process resistance as well as a totally maintenance free sensor which greatly increases sensor life and reduces labour costs.? A Turtle Tough sensor does not contain any O-rings, washers, gaskets, or serviceable components/assemblies. It does not require refreshing or refilling of electrolyte. The only requirement is regular cleaning in accordance with our recommended cleaning schedule for your application. Regular cleaning will prolong the life of your sensor and ensure hassle free operation.



Recommended Cleaning Schedule

Application Difficulty Rating

Cleaning Schedule








Twice (2x) per week



If?a?Turtle?Tough?pH/ORP?sensor?response?slows?down,?it?is?most?likely?the?result?of?a?fouled? reference?or?dirty?coated?glass.??Cleaning?should?be?performed?as?required?and?will?vary?across? applications.??See cleaning instructions.


The standard shelf life for all Turtle Tough pH and ORP sensors is one year from the date of shipment. Sensors stored longer than this period may still be functional but are no longer under warranty. Sensors should be stored in a cool, dry location with the sensor tip (sensing element) oriented toward the ground.? All sensors come standard with a conditioning solution in the cap. This conditioning solution is 50% pH 4 buffer and 50% saturated potassium chloride (mixed by volume). The sensor cap should be kept tightly affixed to the sensor body and sealed with common PVC tape when the sensor is not in use. Sensors that are to be returned for shelf life warranty claim must have the original sensor cap and conditioning solution intact to be eligible for warranty replacement.

Avoiding Thermal Shock

For high temperature applications where process liquid exceeds 70?C you will prolong the life of the sensor by avoiding thermal shock. Thermal shock occurs when you rapidly change the temperature of the sensor from hot to cold or vice versa. This rapid expansion/contraction of sensor components can damage internal elements and cause micro-cracking that will accelerate the rate of deterioration. In extreme cases it will crack the sensing element causing a total failure.? To avoid this sensor should be heated or cooled slowly during removal/insertion and cleaning and calibration processes. Consult your Turtle Tough representative for techniques to avoid thermal shock.

Conditioning After Calibration

After the sensor has been cleaned, it must be thoroughly rinsed with deionised water to remove any residual cleaning reagents. The sensor can then be soaked in pH 4 buffer to recondition the pH and reference elements. Some sensors will also require conditioning in saturated potassium chloride if the reference junction has been depleted of the ions in the solid state conductive polymer (typical for clean water applications). Condition the sensor in saturated potassium chloride and/or pH 4 buffer for whatever period of time is required to achieve optimal calibration results.

Please refer to your sensor manual for correct installation, maintenance and use.