XS Instruments
The ORP meters from XS Instruments enable fast and accurate redox potential measurements – ideal for applications in water analysis, environmental monitoring, industry, and research. With a well thought-out design, easy operation, and durable construction, they are perfectly suited for everyday use.
Key Benefits at a Glance
High Accuracy & Stability
- Precise measurement of redox potential in millivolts (mV)
- High-quality sensors ensure stable and repeatable readings
Compact & Portable Devices
- Ideal for field use or mobile measurements
- Lightweight, ergonomic, and easy to carry
Easy Operation & Fast Results
- Intuitive user interface with clear display
- Results available within seconds
- Supports both automatic and manual calibration
Typical Application Areas
The ORP meters from XS Instruments are highly versatile:
- Water treatment & drinking water monitoring – Monitoring of disinfection processes (e.g., chlorine effectiveness)
- Environmental monitoring – Measuring redox potential in surface waters or wastewater facilities
- Food & beverage industry – Monitoring fermentation processes and ensuring product quality
- Electroplating & chemical industry – Monitoring redox-based reactions in process baths
- Aquatics & swimming pools – Ensuring consistent water quality
Robust & Durable – Built for Daily Use
- Protection against dust and splashing water (e.g., IP67 rated)
- Long service life thanks to replaceable sensors
- Perfectly suited for demanding environments
Conclusion
- XS Instruments offers reliable ORP meters for precise redox potential measurements whether in the lab, in industrial settings, or out in the field. A strong choice for anyone who values ease of use and professional-grade performance.
- All Products
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Parameter
- pH
- ORP
- Conductivity and TDS
- Dissolved oxygen (DO)
- Combined - Multiparameter
- Ammonia (NH3)
- Calcium Ion (Ca2+)
- Chlorid (Cl-)
- Iron (Fe)
- Fluoride (F-)
- Free Chlorine
- Total Chlorine
- Gloss
- Iodine (I)
- Potassium Ion (K+)
- Seawater specific gravity (SSG)
- Sodium Ion (Na+)
- Sodium Chloride (NaCl)
- Nitrate Ion (NO3-)
- Salinity
- Turbidity
- Applications
- Application examples
- Quality
- Brand
- Buffer and calibration solutions
- Spare parts and single components
- Plant analysis - sodium, nitrate, potassium, calcium
- Laboratory Benchtop Meters
- Accessories
Filter products
The XS REVIO is a professional portable multi-parameter meter that can be powered in three different ways (battery, PC, AC adapter). It has an illuminated color graphic display for excellent data visualization in all lighting conditions, also thanks to the possibility of automatically and manually adjusting the contrast and illumination of the display. Measurement of pH, mV, ORP, ISE, conductivity, TDS, salinity, resistivity, dissolved oxygen and temperature. Online help with setup and calibration allows easy and immediate use of the instrument. Simultaneous display of multiple parameters that can be selected by the operator. Automatic pH calibration with USA and NIST buffers up to 5 points and 5 user defined points. Automatic ORP calibration 1 point. Automatic conductivity calibration with up to 4 points and 1 user defined point. Adjustable reference temperature and selectable cell constant. Automatic O2 calibration up to two points (0% - 100%). Display of calibrated points with symbols. GLP functions: Date and time, display of calibration data and calibration period setting.Manual and automatic data logger with the possibility of downloading the data to a PC via micro USB.Display of measurement stability and possibility to select 3 stability levels. All processes are constantly monitored and signaled to the operator by the colored LED above the display and by self-diagnostic messages. The following pre-assembled case variants are available for selection: Variant 1: with digital electrode 201 T DHS, cell 2301T and polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable, in compact case (manufacturer's number: 50110952). Variant 2: with pH electrode 201T/3MT , 2301T cell (conductivity), polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable each, in compact case (manufacturer's number: 50110912)Variant 3: complete with pH electrode 201T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m, in compact case (manufacturer number: 50110922) Variant 4: complete with conductivity cell 2301T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m. Additionally S7-BNC cable and NT55 temperature sensor, each 3m cable, in compact case (manufacturer number: 50110942) Variant 5: with S7-BNC cable and NT55 temperature sensor, both 3m cable, in compact case (manufacturer number: 50110932)
The XS REVIO is a professional portable multi-parameter meter that can be powered in three different ways (battery, PC, AC adapter). It has an illuminated color graphic display for excellent data visualization in all lighting conditions, also thanks to the possibility of automatically and manually adjusting the contrast and illumination of the display. Measurement of pH, mV, ORP, ISE, conductivity, TDS, salinity, resistivity, dissolved oxygen and temperature. Online help with setup and calibration allows easy and immediate use of the instrument. Simultaneous display of multiple parameters that can be selected by the operator. Automatic pH calibration with USA and NIST buffers up to 5 points and 5 user defined points. Automatic ORP calibration 1 point. Automatic conductivity calibration with up to 4 points and 1 user defined point. Adjustable reference temperature and selectable cell constant. Automatic O2 calibration up to two points (0% - 100%). Display of calibrated points with symbols. GLP functions: Date and time, display of calibration data and calibration period setting.Manual and automatic data logger with the possibility of downloading the data to a PC via micro USB.Display of measurement stability and possibility to select 3 stability levels. All processes are constantly monitored and signaled to the operator by the colored LED above the display and by self-diagnostic messages. The following pre-assembled case variants are available for selection: Variant 1: with digital electrode 201 T DHS, cell 2301T and polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable, in compact case (manufacturer's number: 50110952). Variant 2: with pH electrode 201T/3MT , 2301T cell (conductivity), polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable each, in compact case (manufacturer's number: 50110912)Variant 3: complete with pH electrode 201T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m, in compact case (manufacturer number: 50110922) Variant 4: complete with conductivity cell 2301T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m. Additionally S7-BNC cable and NT55 temperature sensor, each 3m cable, in compact case (manufacturer number: 50110942) Variant 5: with S7-BNC cable and NT55 temperature sensor, both 3m cable, in compact case (manufacturer number: 50110932)
The XS REVIO is a professional portable multi-parameter meter that can be powered in three different ways (battery, PC, AC adapter). It has an illuminated color graphic display for excellent data visualization in all lighting conditions, also thanks to the possibility of automatically and manually adjusting the contrast and illumination of the display. Measurement of pH, mV, ORP, ISE, conductivity, TDS, salinity, resistivity, dissolved oxygen and temperature. Online help with setup and calibration allows easy and immediate use of the instrument. Simultaneous display of multiple parameters that can be selected by the operator. Automatic pH calibration with USA and NIST buffers up to 5 points and 5 user defined points. Automatic ORP calibration 1 point. Automatic conductivity calibration with up to 4 points and 1 user defined point. Adjustable reference temperature and selectable cell constant. Automatic O2 calibration up to two points (0% - 100%). Display of calibrated points with symbols. GLP functions: Date and time, display of calibration data and calibration period setting.Manual and automatic data logger with the possibility of downloading the data to a PC via micro USB.Display of measurement stability and possibility to select 3 stability levels. All processes are constantly monitored and signaled to the operator by the colored LED above the display and by self-diagnostic messages. The following pre-assembled case variants are available for selection: Variant 1: with digital electrode 201 T DHS, cell 2301T and polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable, in compact case (manufacturer's number: 50110952). Variant 2: with pH electrode 201T/3MT , 2301T cell (conductivity), polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable each, in compact case (manufacturer's number: 50110912)Variant 3: complete with pH electrode 201T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m, in compact case (manufacturer number: 50110922) Variant 4: complete with conductivity cell 2301T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m. Additionally S7-BNC cable and NT55 temperature sensor, each 3m cable, in compact case (manufacturer number: 50110942) Variant 5: with S7-BNC cable and NT55 temperature sensor, both 3m cable, in compact case (manufacturer number: 50110932)
The XS REVIO is a professional portable multi-parameter meter that can be powered in three different ways (battery, PC, AC adapter). It has an illuminated color graphic display for excellent data visualization in all lighting conditions, also thanks to the possibility of automatically and manually adjusting the contrast and illumination of the display. Measurement of pH, mV, ORP, ISE, conductivity, TDS, salinity, resistivity, dissolved oxygen and temperature. Online help with setup and calibration allows easy and immediate use of the instrument. Simultaneous display of multiple parameters that can be selected by the operator. Automatic pH calibration with USA and NIST buffers up to 5 points and 5 user defined points. Automatic ORP calibration 1 point. Automatic conductivity calibration with up to 4 points and 1 user defined point. Adjustable reference temperature and selectable cell constant. Automatic O2 calibration up to two points (0% - 100%). Display of calibrated points with symbols. GLP functions: Date and time, display of calibration data and calibration period setting.Manual and automatic data logger with the possibility of downloading the data to a PC via micro USB.Display of measurement stability and possibility to select 3 stability levels. All processes are constantly monitored and signaled to the operator by the colored LED above the display and by self-diagnostic messages. The following pre-assembled case variants are available for selection: Variant 1: with digital electrode 201 T DHS, cell 2301T and polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable, in compact case (manufacturer's number: 50110952). Variant 2: with pH electrode 201T/3MT , 2301T cell (conductivity), polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable each, in compact case (manufacturer's number: 50110912)Variant 3: complete with pH electrode 201T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m, in compact case (manufacturer number: 50110922) Variant 4: complete with conductivity cell 2301T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m. Additionally S7-BNC cable and NT55 temperature sensor, each 3m cable, in compact case (manufacturer number: 50110942) Variant 5: with S7-BNC cable and NT55 temperature sensor, both 3m cable, in compact case (manufacturer number: 50110932)
The XS REVIO is a professional portable multi-parameter meter that can be powered in three different ways (battery, PC, AC adapter). It has an illuminated color graphic display for excellent data visualization in all lighting conditions, also thanks to the possibility of automatically and manually adjusting the contrast and illumination of the display. Measurement of pH, mV, ORP, ISE, conductivity, TDS, salinity, resistivity, dissolved oxygen and temperature. Online help with setup and calibration allows easy and immediate use of the instrument. Simultaneous display of multiple parameters that can be selected by the operator. Automatic pH calibration with USA and NIST buffers up to 5 points and 5 user defined points. Automatic ORP calibration 1 point. Automatic conductivity calibration with up to 4 points and 1 user defined point. Adjustable reference temperature and selectable cell constant. Automatic O2 calibration up to two points (0% - 100%). Display of calibrated points with symbols. GLP functions: Date and time, display of calibration data and calibration period setting.Manual and automatic data logger with the possibility of downloading the data to a PC via micro USB.Display of measurement stability and possibility to select 3 stability levels. All processes are constantly monitored and signaled to the operator by the colored LED above the display and by self-diagnostic messages. The following pre-assembled case variants are available for selection: Variant 1: with digital electrode 201 T DHS, cell 2301T and polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable, in compact case (manufacturer's number: 50110952). Variant 2: with pH electrode 201T/3MT , 2301T cell (conductivity), polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable each, in compact case (manufacturer's number: 50110912)Variant 3: complete with pH electrode 201T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m, in compact case (manufacturer number: 50110922) Variant 4: complete with conductivity cell 2301T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m. Additionally S7-BNC cable and NT55 temperature sensor, each 3m cable, in compact case (manufacturer number: 50110942) Variant 5: with S7-BNC cable and NT55 temperature sensor, both 3m cable, in compact case (manufacturer number: 50110932)
Dear customers, our handy pocket tester analysis case protects your handheld tester safely and also offers you space for the required calibration and buffer solutions. The storage solution matching the tester in the 25 ml sachet and the 70ml 475mV redox solution finds place in the foam blank. Your analysis case consists of the following components: 1x pocket tester 1x storage solution (25ml sachet or 70ml bottle) 1x ORP 475mV solution in a 70ml bottle 2x batteries 1x lanyard for the pocket tester 1x pack of tissues You can also purchase the case separately to safely store your existing testers and always have the appropriate calibration and buffer solutions on site in the case. IP protection class: IP67
IP Protection: IP67 With exchangeable probe Manufacturer article number: 50014313
The high quality XS Instruments portable multi-parameter meters of the Vio 7 and Vio 70 series with innovative high-resolution colour display are suitable for working in all conditions and offer easy handling through an integrated user-friendly operator guide in the form of the set-up and calibration mode. This allows the user to operate the instruments easily and intuitively. The XS Instruments meters feature automatic pH calibration with USA and NIST buffers with up to three points for pH and one point for ORP. The user is supported by intuitive symbols on the backlit screen, including display of the measurement stability (adjustable) and any errors. Another plus point is that the multi-parameter meter is supplied in a professional measuring case, which contains the selected measuring electrode, as well as the appropriate buffer solutions and instructions. Complementary advantages of the 70 Vio version: GLP functions: Date and time, recall of calibration data and "Calibration due" function Integrated data logger for up to 1000 data, automatic and manual PC connection via USB for evaluation of measurement data (Micro-USB on the instrument side) via Data Link+ software Automatic brightness control of the display (prolongs battery life) Only 6 keys for easy control of all functions of the unit 230V power supply unit Manufacturer article number: 50119012
Dear customers, our handy pocket tester analysis case protects your handheld tester safely and also offers you space for the required calibration and buffer solutions. The 25ml sachet or 70ml bottle solutions matching the tester can be accommodated in the foam blank. Your analysis case consists of the following components: 1x pocket tester 1x pH 4.01 buffer solution (25ml sachet) 1x pH 7.00 buffer solution (25ml sachet or 70ml bottle) 1x conductivity calibration solution EC 1413 µS/CM (25ml sachet or 70ml bottle) 1x 475mV ORP solution (70ml bottle) 1x storage solution (25ml sachet) 2x batteries 1x lanyard for the pocket tester 1x pack of tissues You can also purchase the case separately to safely store your existing testers and always have the appropriate calibration and buffer solutions on site in the case. IP protection class: IP67
IP Protection: IP67 With exchangeable combined probe Manufacturer article number: 50014293
The high quality XS Instruments portable multi-parameter meters of the Vio 7 and Vio 70 series with innovative high-resolution colour display are suitable for working in all conditions and offer easy handling through an integrated user-friendly operator guide in the form of the set-up and calibration mode. This allows the user to operate the instruments easily and intuitively. The XS Instruments meters feature automatic pH calibration with USA and NIST buffers with up to three points for pH and one point for ORP. The user is supported by intuitive symbols on the backlit screen, including display of the measurement stability (adjustable) and any errors. Another plus point is that the multi-parameter meter is supplied in a professional measuring case, which contains the selected measuring electrode, as well as the appropriate buffer solutions and instructions. Complementary advantages of the 70 Vio version: GLP functions: Date and time, recall of calibration data and "Calibration due" function Integrated data logger for up to 1000 data, automatic and manual PC connection via USB for evaluation of measurement data (Micro-USB on the instrument side) via Data Link+ software Automatic brightness control of the display (prolongs battery life) Only 6 keys for easy control of all functions of the unit 230V power supply unit Manufacturer article number: 50110012
The high quality XS Instruments portable multi-parameter meters of the Vio 7 and Vio 70 series with innovative high-resolution colour display are suitable for working in all conditions and offer easy handling through an integrated user-friendly operator guide in the form of the set-up and calibration mode. This allows the user to operate the instruments easily and intuitively. The XS Instruments meters feature automatic pH calibration with USA and NIST buffers with up to three points for pH and one point for ORP. The user is supported by intuitive symbols on the backlit screen, including display of the measurement stability (adjustable) and any errors. Another plus point is that the multi-parameter meter is supplied in a professional measuring case, which contains the selected measuring electrode, as well as the appropriate buffer solutions and instructions.Complementary advantages of the 70 Vio version:GLP functions: Date and time, recall of calibration data and "Calibration due" functionIntegrated data logger for up to 1000 data, automatic and manual PC connection via USB for evaluation of measurement data (Micro-USB on the instrument side) via Data Link+ software Automatic brightness control of the display (prolongs battery life) Only 6 keys for easy control of all functions of the unit 230V power supply unit Manufacturer article number: 50110112
This portable device accurately measures pH values (0.01 resolution) and ORP/redox potentials and, thanks to its IP67 protection, is also reliable for outdoor use. With automatic three-point pH calibration, flexible ORP calibration, temperature compensation and mV diagnostic function, it is extremely versatile. The large 3-colour display clearly shows measured values, calibration buffers, stability and temperature. Practical extras such as auto power-off and self-diagnostic messages make it particularly safe and user-friendly. IP protection class: IP67With replaceable probeManufacturer item number: 50014133
Dear customers, our handy pocket tester analysis case protects your handheld tester safely and also offers you space for the required calibration and buffer solutions. The pH buffer and storage solution matching the tester in the 25 ml sachet and the 70ml 475mV redox solution finds place in the foam blank. Your analysis case consists of the following components: 1x pocket tester 1x pH 4.01 buffer solution (25ml bag or 70ml bottle) 1x storage solution (25ml bag or 70ml bottle) 1x 475mV ORP solution in a 70ml bottle 2x batteries 1x lanyard for the pocket tester 1x pack of tissues You can also purchase the case separately to safely store your existing testers and always have the appropriate calibration and buffer solutions on site in the case. IP protection class: IP67
This compact measuring device combines pH and ORP/redox measurement in a robust, waterproof housing (IP67). With a resolution of 0.01 pH and mV, it offers maximum precision. The built-in microprocessor and replaceable combination electrode ensure reliable and long-lasting use. The three-colour LCD display clearly shows all important information: calibration buffers used, measurement stability, temperature and mV values. pH calibration is performed automatically at three points with five selectable US buffer values, while ORP calibration can be flexibly performed at a point specified by the user. In addition, the mV display can be used for both electrode diagnosis and redox measurement. For convenient operation, a temperature display, automatic temperature compensation (0–60 °C), an automatic switch-off function and clear self-diagnostic messages for low battery status or calibration errors are integrated. This makes the device ideal for precise laboratory and field applications. IP protection class: IP67 With interchangeable probeManufacturer item number: 50014173