Reliable online measurement of ORP – with DULCOTEST® sensors
Our product line of DULCOTEST® ORP electrodes provides a wide range of sensors for different measuring tasks. The field of application covers everything from simpler water treatment tasks to industrial process waters with more stringent requirements in terms of temperature, pressure, contamination tolerance and chemical resistance.
The production of our electrodes is subject to very strict quality controls. Routine steps are automated but critical steps are carried out manually under expert supervision. In this way we achieve optimum reproducible quality and cost reduction.
ORP potential is a measured variable that quantifies the presence of oxidants or reducing agents in a medium under specific conditions on a non-selective basis. Measuring this parameter is relatively inexpensive, but does have some drawbacks: no selective measurement of a specific oxidant / reducing agent, strong dependence on pH, measuring signal tends towards a saturation curve as concentration increases. To measure specific reducing agents and oxidants selectively, without the above disadvantages, suitable amperometric sensors are used (e.g. chlorine sensors).
Your benefits
- Precise and reliable measurement enables efficient processes and maximum process reliability
- The wide choice of sensor types with different constructions makes them reliable components in many applications
- A long service life is achieved through the use of select quality materials for the measuring electrodes and diaphragms and a stable reference system. This minimises both downtime and maintenance
- With short storage times and fast delivery, your sensors can be up and running very quickly and you can make maximum use of their service life (all glass sensors start to age as soon as they leave production)
- Wide range of special versions for fitting length, cable length and plugs for made-to-measure connection to your process
- Unique label for OEM partners
Technical Details
- Selection of sensor type according to the application
- The insertion angle must be > 15° from the horizontal
- Maximum flow < 0.8 m/s
- With cable lengths > 10 m, use the 4-20 mA transducer type PHV1
- Calibration using quality buffer solutions
ORP Sensor RHES-Pt-SE
ORP sensor optimised for use in potable water treatment, swimming pools/hot tubs at up to 60 °C/3 bar
Your benefits
- Electrochemical combination electrode: ORP and reference electrode integrated
- Diaphragm and reference system optimised for use in swimming pools and for potable water
- Ceramic diaphragm with special material, optimised size and optimised pore diameter
- Long service life due to reduced diffusion ("bleeding") of the electrolyte
- Long service life due to the material, which is inert to aggressive disinfectants
- Stable reference system
- Rotating sensor head sleeve. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding moisture on the plug-in contacts
- Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
| Temperature | 0 … 60 °C |
| Max. pressure | 3.0 bar |
| Min. conductivity | 150 µS/cm |
| Electrolyte | Gel containing potassium chloride |
| ORP electrode | Platinum |
| Diaphragm | Ceramic |
| Sensor shaft | Glass |
| Shaft diameter | 12 mm |
| Fitting length | 120 ±3 mm |
| Fitting position | Vertical up to +25° |
| Thread | PG 13.5 |
| Electrical connection | SN6 plug-in head, rotatable with a ProMinent cable |
| Enclosure rating | IP 65 |
| Installation | Bypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube |
| Measuring and control equipment | all DULCOMETER® controllers |
| Typical applications | Swimming pools, whirlpools, potable water. |
| Resistance to | Disinfectant |
| Measuring principle, technology | Direct potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm |
| Fitting length | Order no. |
|---|
| RHES-Pt-SE SLg100 | 100 ±3 mm | 1051746 |
| RHES-Pt-SE | 120 ±3 mm | 150703 |
ORP Sensor RHES-Au-SE
ORP sensor optimised for use in potable water treatment, swimming pools/hot tubs when electrolysis processes are used for disinfection and with ozone treatment at up to 60 °C/3 bar
Your benefits
- Electrochemical combination electrode: ORP and reference electrode integrated
- Gold electrode to prevent faults by products from electrolysis processes where the electrodes are immersed directly into the sample water
- Diaphragm and reference system optimised for use in swimming pools and for potable water
- Ceramic diaphragm with special material, optimised size and optimised pore diameter
- Long service life due to reduced diffusion ("bleeding") of the electrolyte
- Long service life due to material, which is inert to aggressive disinfectants
- Stable reference system
- Rotating sensor head sleeve. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding moisture on the plug-in contacts
- Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
| Temperature | 0 … 60 °C |
| Max. pressure | 3.0 bar |
| Min. conductivity | 150 µS/cm |
| Electrolyte | Gel containing potassium chloride |
| ORP electrode | Gold |
| Diaphragm | Ceramic |
| Sensor shaft | Glass |
| Shaft diameter | 12 mm |
| Fitting length | 120 ±3 mm |
| Fitting position | Vertical up to +25° |
| Thread | PG 13.5 |
| Electrical connection | SN6 plug-in head, rotatable with a ProMinent cable |
| Enclosure rating | IP 65 |
| Installation | Bypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube |
| Measuring and control equipment | all DULCOMETER® controllers |
| Typical applications | Swimming pools, whirlpools, potable water, with disinfectants from electrolysis processes (electrodes directly in the process water). |
| Resistance to | Disinfectant, by-products from electrolysis process and from ozone treatment process |
| Measuring principle, technology | Direct potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm |
| Fitting length | Order no. |
|---|
| RHES-Au-SE | 120 ±3 mm | 1044544 |
ORP Sensor RHEP-Pt-SE
ORP sensor optimised for use with clear process water and conditions of up to 80 °C/6 bar
Your benefits
- Electrochemical combination electrode: ORP and reference electrode integrated
- Diaphragm and reference system optimised for exacting process requirements
- Ceramic diaphragm with special material, optimised size and optimised pore diameter
- Long service life due to reduced diffusion ("bleeding") of the electrolyte
- Long service life due to material, which is inert to aggressive chemicals
- Stable reference system for high pressure / temperature requirements
- Rotating sensor head sleeve. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding moisture on the plug-in contacts
- Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
| Temperature | 0 … 80 °C |
| Max. pressure | 6.0 bar |
| Min. conductivity | 150 µS/cm |
| Electrolyte | Gel containing potassium chloride |
| ORP electrode | Platinum |
| Diaphragm | Ceramic |
| Sensor shaft | Glass |
| Shaft diameter | 15 mm |
| Fitting length | 120 ±3 mm |
| Fitting position | Vertical up to +25° |
| Thread | PG 13.5 |
| Electrical connection | SN6 plug-in head, rotatable with a ProMinent cable |
| Enclosure rating | IP 65 |
| Installation | Bypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube |
| Measuring and control equipment | all DULCOMETER® controllers |
| Typical applications | Swimming pools during pressurisation for higher temperatures and pressures, potable and industrial water, electroplating. |
| Resistance to | Disinfectant, not suitable for media containing ozone, cyanides, electrolysis processes (electrodes directly in the sample water) |
| Measuring principle, technology | Direct potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm |
| Fitting length | Order no. |
|---|
| RHEP-Pt-SE | 120 ±3 mm | 150094 |
ORP Sensor RHEP-Au-SE
ORP sensor optimised for use with clear process water when electrolysis processes are used for disinfection and with ozone treatment and with cyanide detoxification at conditions of up to 80 °C/6 bar
Your benefits
- Electrochemical combination electrode: ORP and reference electrode integrated
- Gold electrode to prevent faults by products from electrolysis processes where the electrodes are immersed directly into the sample water
- Diaphragm and reference system optimised for exacting process requirements
- Ceramic diaphragm with special material, optimised size and optimised pore diameter
- Long service life due to reduced diffusion ("bleeding") of the electrolyte
- Long service life due to the material, which is inert to aggressive chemicals
- Stable reference system for high pressure / temperature requirements
- Rotating sensor head sleeve. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding moisture on the plug-in contacts
- Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
| Temperature | 0 … 80 °C |
| Max. pressure | 6.0 bar |
| Min. conductivity | 150 µS/cm |
| Electrolyte | Gel containing potassium chloride |
| ORP electrode | Gold |
| Diaphragm | Ceramic |
| Sensor shaft | Glass |
| Shaft diameter | 15 mm |
| Fitting length | 120 ±3 mm |
| Fitting position | Vertical up to +25° |
| Thread | PG 13.5 |
| Electrical connection | SN6 plug-in head, rotatable with a ProMinent cable |
| Enclosure rating | IP 65 |
| Installation | Bypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube |
| Measuring and control equipment | all DULCOMETER® controllers |
| Typical applications | Cyanide detoxification, ozone monitoring. |
| Resistance to | Disinfectant, by-products from electrolysis process and from ozone treatment process, cyanides |
| Measuring principle, technology | Direct potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm |
| Fitting length | Order no. |
|---|
| RHEP-Au-SE | 120 ±3 mm | 1003875 |
ORP Sensor RHEIC-Pt-SE
ORP sensor optimised for use in industrial waste water/water – with DULCOTEST® sensors.
Your benefits
- Mechanically resistant platinum dome permits lasting use even when exposed to abrasive particles
- Large dirt-repellent Teflon diaphragm protects against unwanted blockage of the reference
- Double junction reference system for stability with chemically polluted water
- Large electrolyte reservoir for long service lives
- Solid high-grade plastic housing with integrated process connection for direct installation in the process with ½" and ¾" NPT thread
| Temperature | 0 … 80 °C |
| Max. pressure | 6.0 bar |
| Min. conductivity | 50 µS/cm |
| Electrolyte | gel containing potassium chloride with a large KCI reservoir of gel |
| Diaphragm | PTFE ring diaphragm |
| Sensor shaft | Plastic |
| Sensor shaft Ø | 17 ±0.2 mm (below the ½" NPT thread), 22 ±0.2 mm (below the ¾" thread) |
| Fitting length | 20 ±0.2 mm (from the lower end of the ½" thread), 60 ±0.2 mm (from the lower end of the ¾" thread) |
| Fitting position | Vertical up to +25° |
| Thread | ½" and ¾" NPT thread |
| Electrical connection | SN6 plug-in head, rotatable with a ProMinent cable |
| Enclosure rating | IP 65 |
| Installation | Bypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube |
| Measuring and control equipment | all DULCOMETER® controllers |
| Typical applications | Municipal and industrial waste water, cooling water, process water, water in the chemical industry and paper making, general use for water with solid fractions. |
| Resistance to | Disinfectant, solids content (turbid water), water-soluble chemicals |
| Measuring principle, technology | direct potentiometric measurement, 2 probes, double junction, gel electrolyte, large Teflon diaphragm, separate temperature measurement for temperature compensation needed |
| Order no. |
|---|
| RHEIC-Pt-SE | 1082281 |
ORP Sensor RHER-Pt-SE
ORP sensor optimised for use in contaminated water containing solids and for low conductivity of > 50 μS/cm at up to 80 °C/6 bar
Your benefits
- Electrochemical combination electrode: ORP and reference electrode integrated
- The large dirt-repellent Teflon® diaphragm prevents the reference system from becoming blocked up
- Long service life when solids are present
- High-viscosity electrolyte combined with a salt reservoir prevents the electrolyte from "bleeding"
- Long service life without drifts when there is clear water with low conductivity
- Rotating sensor head sleeve. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding moisture on the plug-in contacts
- Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
| Temperature | 0 … 80 °C |
| Max. pressure | 6.0 bar |
| Min. conductivity | 50 µS/cm |
| Electrolyte | Electrolyte with KCI supplement (salt rings in the reference electrolyte) |
| ORP electrode | Platinum |
| Diaphragm | PTFE ring diaphragm |
| Sensor shaft | Glass |
| Shaft diameter | 12 mm |
| Fitting length | 120 ±3 mm |
| Fitting position | Vertical up to +25° |
| Thread | PG 13.5 |
| Electrical connection | SN6 plug-in head/other versions on request |
| Enclosure rating | IP 65 |
| Installation | Bypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube |
| Measuring and control equipment | all DULCOMETER® controllers |
| Typical applications | Municipal and industrial waste water, cooling water, process water, chemical applications, paper manufacturing. In general for water with a noticeable solid fraction. |
| Resistance to | Disinfectant, solids content (turbid types of water) |
| Measuring principle, technology | Direct potentiometric measurement, 2 electrodes, Teflon ring diaphragm, polymer electrolyte |
| Fitting length | Order no. |
|---|
| RHER-Pt-SE | 120 ±3 mm | 1002534 |
ORP Sensor RHEX-Pt-SE
ORP sensor optimised for use with contaminated water with a high solids content at 6 bar/100 °C or 16 bar/25 °C
Your benefits
- Electrochemical combination electrode: ORP and reference electrode integrated
- Diaphragm and reference system optimised for extremely high solids content
- The solid electrolyte makes the diaphragm redundant and prevents the reference system from becoming blocked up
- Long service life when sludge is present due to lack of a diaphragm
- Long service life as the solid electrolyte prevents the electrolyte from "bleeding"
- Stable reference system
- Rotating sensor head sleeve. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding moisture on the plug-in contacts
- Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
| Temperature | 0 … 100 °C |
| Max. pressure | 16.0 bar up to 25 °C, 6.0 bar up to 100 °C |
| Min. conductivity | 500 µS/cm |
| Electrolyte | Polymer containing potassium chloride (solid) |
| ORP electrode | Platinum |
| Diaphragm | Circular gap (solid electrolyte) |
| Sensor shaft | Glass |
| Shaft diameter | 12 mm |
| Fitting length | 120 ±3 mm |
| Fitting position | Vertical up to +25° |
| Thread | PG 13.5 |
| Electrical connection | SN6 plug-in head/other versions on request |
| Enclosure rating | IP 65 |
| Installation | Bypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube |
| Measuring and control equipment | all DULCOMETER® controllers |
| Typical applications | Waste water, industrial water, process chemistry, emulsions, suspensions, protein-containing media. In general for water with a high solid fraction. Not suitable for clear media. Not suitable for media with oxidation agents. |
| Resistance to | Solids content (turbid types of water), sludge, emulsions |
| Measuring principle, technology | Direct potentiometric measurement, 2 electrodes, no diaphragm, polymer electrolyte |
| Fitting length | Order no. |
|---|
| RHEX-Pt-SE | 120 ±3 mm | 305097 |
ORP Sensor RHEN-Pt-SE
Refillable ORP sensor optimised for use with chemically contaminated water at up to 80 °C/without excess pressure
Your benefits
- Electrochemical combination electrode: ORP and reference electrode integrated
- Renewable liquid electrolyte by continuous replenishment from an electrolyte bottle installed above the electrode
- 1 ceramic diaphragm made of special material, with an optimised size and with optimised pore diameter
- Long service life in the presence of chemicals dissolved in the water, which could contaminate the reference system
- Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
| Temperature | 0 … 80 °C |
| Max. pressure | Operation at atmospheric pressure |
| Min. conductivity | 150 µS/cm |
| Electrolyte | KCl electrolyte, refillable |
| ORP electrode | Platinum |
| Diaphragm | Ceramic |
| Sensor shaft | Glass |
| Shaft diameter | 12 mm |
| Fitting length | 120 ±3 mm |
| Fitting position | Vertical up to +25° |
| Thread | PG 13.5 |
| Electrical connection | SN6 plug-in head/other versions on request |
| Enclosure rating | IP 65 |
| Installation | By tripod or manually |
| Measuring and control equipment | all DULCOMETER® controllers |
| Typical applications | Waste water, cooling water, chemically contaminated water, only clear types of water. |
| Resistance to | Disinfectant, chemicals dissolved in water |
| Measuring principle, technology | Direct potentiometric measurement, 2 electrodes, liquid electrolyte, 1 ceramic diaphragm |
| Fitting length | Order no. |
|---|
| RHEN-Pt-SE | 120 ±3 mm | 305091 |
Supplied without PE storage tank and tube
ORP Sensor RHEK-Pt-S
ORP sensor with plastic shaft for use with manual measuring instruments, optimised for use in potable water treatment, swimming pools/hot tubs at up to 60 °C/3 bar
Your benefits
- Electrochemical combination electrode: ORP and reference electrode integrated
- Diaphragm and reference system optimised for use in swimming pools and for potable water
- With plastic shaft to prevent glass breakage
- Mechanical protection of the glass diaphragm
- Ceramic diaphragm with special material, optimised size and optimised pore diameter
- Long service life due to reduced diffusion ("bleeding") of the electrolyte
- Long service life due to the material, which is inert to aggressive disinfectants
- Stable reference system
- Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
| Temperature | 0 … 60 °C |
| Max. pressure | Operation at atmospheric pressure |
| Min. conductivity | 150 µS/cm |
| Electrolyte | Gel containing potassium chloride |
| ORP electrode | Platinum |
| Diaphragm | Ceramic |
| Sensor shaft | Polycarbonate |
| Shaft diameter | 12 mm |
| Fitting length | 125 ±3 mm |
| Fitting position | Vertical up to +25° |
| Thread | None |
| Electrical connection | SN6 plug-in head, rotatable with a ProMinent cable |
| Enclosure rating | IP 65 |
| Installation | By tripod or manually |
| Measuring and control equipment | all DULCOMETER® controllers |
| Typical applications | Manual measurement e. g. swimming pools, potable water, aquarium water. |
| Resistance to | Disinfectant |
| Measuring principle, technology | Direct potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm |
| Fitting length | Order no. |
|---|
| RHEK-Pt-S | 125 ±3 mm | 305052 |
ORP Sensor RHEK-Pt-SE
ORP sensor with plastic shaft, optimised for use in potable water treatment, swimming pools/hot tubs at up to 60 °C/3 bar
Your benefits
- Electrochemical combination electrode: ORP and reference electrode integrated
- Diaphragm and reference system optimised for use in swimming pools and for potable water
- With plastic shaft to prevent glass breakage
- Mechanical protection of the glass diaphragm
- Ceramic diaphragm with special material, optimised size and optimised pore diameter
- Long service life due to reduced diffusion ("bleeding") of the electrolyte
- Long service life due to the material, which is inert to aggressive disinfectants
- Stable reference system
- Rotating sensor head sleeve. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding moisture on the plug-in contacts
- Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)
| Temperature | 0 … 60 °C |
| Max. pressure | 3.0 bar |
| Min. conductivity | 150 µS/cm |
| Electrolyte | Gel containing potassium chloride |
| ORP electrode | Platinum |
| Diaphragm | Ceramic |
| Sensor shaft | Polycarbonate |
| Shaft diameter | 12 mm |
| Fitting length | 120 ±3 mm |
| Fitting position | Vertical up to +25° |
| Thread | PG 13.5 |
| Electrical connection | SN6 plug-in head, rotatable with a ProMinent cable |
| Enclosure rating | IP 65 |
| Installation | Bypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube |
| Measuring and control equipment | all DULCOMETER® controllers |
| Typical applications | Swimming pool, potable water, aquariums. |
| Resistance to | Disinfectant |
| Measuring principle, technology | Direct potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm |
| Fitting length | Order no. |
|---|
| RHEK-Pt-SE | 120 ±3 mm | 1028459 |
ORP Sensor RHEK-L Pt-SE
ORP sensor with plastic shaft, optimised for vertical to horizontal installation position for use in potable water treatment, swimming pools/hot tubs at up to 60 °C/3 bar
Your benefits
- Electrochemical combination electrode: ORP and reference electrode integrated
- With plastic shaft to prevent glass breakage
- Horizontal (level) installation possible (90° angle) (usually limited to 0 - 75° angle)
- Diaphragm and reference system optimised for use in swimming pools and for potable water
- Ceramic diaphragm with special material, optimised size and optimised pore diameter
- Long service life due to reduced diffusion ("bleeding") of the electrolyte
- Rotating sensor head sleeve. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding moisture on the plug-in contacts
- Long service life due to the material, which is inert to aggressive disinfectants
- Stable reference system
| Temperature | 0 … 60 °C |
| Max. pressure | 3.0 bar |
| Min. conductivity | 150 µS/cm |
| Electrolyte | Gel containing potassium chloride |
| ORP electrode | Platinum |
| Diaphragm | Ceramic |
| Sensor shaft | Polycarbonate |
| Shaft diameter | 12 mm |
| Fitting length | 120 ±3 mm |
| Fitting position | vertical to horizontal |
| Thread | PG 13.5 |
| Electrical connection | SN6 plug-in head, rotatable with a ProMinent cable |
| Enclosure rating | IP 65 |
| Installation | Bypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube |
| Measuring and control equipment | all DULCOMETER® controllers |
| Typical applications | Swimming pools, potable water, aquariums, horizontal installation possible. |
| Resistance to | Disinfectant |
| Measuring principle, technology | Direct potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm |
| Fitting length | Order no. |
|---|
| RHEK-L Pt-SE | 120 ±3 mm | 1034919 |
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