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Mettler Toledo® InLab® Sensors Electrodes
The manufacturing of high quality sensors with outstanding performance not only requires technical skills and expertise but also a profound understanding of the various customer applications and their specific requirements. METTLER TOLEDO has built up an enormous treasure trove of experience and knowledge over the last decades, which has resulted in a complete sensor portfolio that supports any of your applications Mettler Toledo® pH Meters

Mettler Toledo® InLab® Sensors Electrodes
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Mettler Toledo® InLab® Sensors Electrodes

General Purpose pH Glass

Premium pH Glass Electrodes

Specialist Micro pH Glass Electrodes

Specialist Solid pH Glass Electrodes

Specialist Low Temperatures pH Glass Electrodes

ORP Electrodes

Performance to Trust
Measurements have to be fast, precise and reproducible. Tried and trusted technologies combined with state-of-the-art production processes guarantee highest performance for every InLab sensor, providing reliable results at any time.

Easy to Use
All InLab sensors are shipped ready to use. Everything you need for your measurement comes together with the sensor. Your work in the lab will be simplified by application specific sensors, automatic recognition of ISM sensors and the spillfree wetting cap

Built to Last
The thought-out InLab sensor construction as well as the highquality materials used for manufacturing guarantee high robustness even in harsh applications. The versatile sensor portfolio ensures the perfectly suited sensor for every application, a match that greatly extends the lifetime of the products.

InLab® Sensor Technology Proven Reliability
The variety of electrochemical sensors is as diverse as the applications they are used for. Only the right combination of high-quality materials, tried-and-trusted technologies, and the shape of the membrane make a sensor perfectly suited for a specific application.

  • Membrane Glass - The membrane is the pH sensing part of the sensor. Its shape and glass composition are optimized to assure best results for different applications.
  • HA – High alkali glass with low alkali error for high pH values and high temperatures.
  • U – Universal glass for standard applications and small membranes.
  • A41 – highly robust glass particularly resistant to harsh chemicals, suitable for high temperatures.
  • LoT – Low temperature glass with low resistance. Suitable for samples with low temperatures and low ion concentrations.
  • HF – Hydrofluoric acid resistant glass for samples containing hydrofluoric acid (up to 1 g/L).

  • Wetting Cap - Ready to use at any time, easy to handle and spill proof. Perfect to keep the glass membrane hydrated.
  • Junction - The junction is the connection between the reference electrolyte and the sample.
  • Temperature Probe - Temperature compensation included! The pH value of a solution is temperature dependent. Thus, the temperature should be measured with every pH value.
  • Ceramic Junctions - For general applications.
  • Sleeve Junctions - For fast results, best in dirty samples.
  • Open Junctions - For easy cleaning and clogfree measurement.
  • SafeLock™ - For refillable sensors: easy to open for measurement, perfectly sealed for storage and transport.
  • Reference Electrolyte - Liquid electrolytes are typically used for general applications and provide fast results. Polymer or gel electrolytes stand for low maintenance.
  • Shaft Material - The sensor robustness is dependent on the right shaft material. Glass is highly chemically resistant and allows for measurements at high temeratures. When mechanical robustness is key, plastic is the preferred material
  • Reference System - Provides a stable potential against which the pH dependent potential can be compared.
  • ARGENTHAL™ with silver ion trap - For silver ion free electrolyte. No clogging of the junction due to sulfide or protein containing samples or TRIS buffers.
  • SteadyForce™ - Pressurized (3 bar) electrolyte ensures electrolyte flow even in viscous samples and guarantees highly reproducible results.

ISM

  • Intelligent Sensor Management - Every ISM marked sensor offers data security and easy handling.
  • Secure and efficient - Calibration data and sensor ID are automatically transferred to the meter.
  • Always up to date - New calibration data are stored in the sensor.
  • Backup certificate guaranteed - Initial factory calibration is stored in the sensor.
  • Conclusive calibration history - The last five calibrations are stored in the sensor.
  • Easy lifetime monitoring - The maximum temperature that the sensor has been exposed to is monitored automatically.

General Purpose pH Glass Electrodes

Time is Precious Sensors for Fast Results

Liquid filled electrodes are reliable workhorses, constructed for efficient pH measurements in daily laboratory use of a wide application range. For more complex sample matrices like emulsions or biological media, electrodes with a sleeve junction are recommended.

Electroplating is a common technique used to coat metals in order to add desired properties to them. Strong acids and bases are needed for this process and the robust HA glass of the InLab Routine Pro-ISM is ideal for this application as it covers the whole pH range with an extremely low alkali error.

Model Routine
51343050
Routine Pro
51343054
Routine Pro-ISM
51344055
Science
51343070
Science Pro-ISM
51344072
Versatile Pro
51343031
Price Mettler Toledo® InLab® Routine 51343050 General Purpose 2-in-1 ARGENTHAL with Ag+ ion trap Electrode
$190.95
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Mettler Toledo® InLab® Routine 51343054 General Purpose 3-in-1 ATC probe (TRIS compatible) Electrode
$283.10
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Mettler Toledo® InLab® Routine 51344055 4-in-1 General Purpose ATC Probe with Argenthal with ISM Electrode
$330.60
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Mettler Toledo® InLab® Routine 51343070 4-in-1General Purpose 2-in-1 Movable glass sleeve Electrode
$327.75
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Mettler Toledo® InLab® Routine 51344072 4-in-1 General Purpose ATC Probe with moveable glass sleeve and ATC Electrode
$517.75
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Mettler Toledo® InLab® Routine 51343031 Economy 3-in-1 Replaceable junction, refillable, ATC probe Electrode
$243.20
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pH range 0 – 14 0 – 14 0 – 14 0 – 12 0 – 12 0 – 14
Temperature probe - NTC 30 kΩ NTC 30 kΩ - NTC 30 kΩ NTC 30 kΩ
Type of membrane glass HA HA HA A41 A41 U
Membrane resistance (25 °C) < 600 MΩ < 600 MΩ < 600 MΩ < 600 MΩ < 600 MΩ < 250 MΩ
Type of junction Ceramic Ceramic Ceramic Movable glass sleeve Movable glass sleeve Ceramic
Bridge electrolyte - - - - 3 mol/L KCl -
Cable and connection S7 MultiPin™ MultiPin™ S7 MultiPin™ 1.2 m cable; BNC / RCA
Shaft material Glass Glass Glass Glass Glass Polysulfone
Shaft length 120 mm 120 mm 120 mm 120 mm 170 mm 120 mm
Common specifications Type of electrode: pH-combination / Reference system: ARGENTHAL™ with Ag+-trap / Reference electrolyte: 3 mol/L KCl Temperature range: 0…100 °C / Shaft diameter: 12 mm



Premium pH Glass Electrodes

Always Ready Maintenance-Free Sensors

Well-equipped for challenging tasks. The highly robust PEEK shaft in combination with the open junction makes the InLab Expert both resilient and easy to handle. Its solid reference electrolyte requires no refilling and is always ready for use. If highest performance is expected, the InLab Power is the first choice.

The InLab Power-Pro-ISM is simply brilliant. The SteadyForce™ reference system is under over-pressure. This guarantees highest reproducibility of pH measurements even in challenging samples like polymeric dispersions which are used in the production of plastics.

Model Expert Pro
51343101
Expert Pro-ISM
30014096
InLab® Power
51343110
Power Pro-ISM
51344211
Easy
51343010
Price Mettler Toledo® InLab® Expert Pro 51343101 Premium 3-in-1 Open junction, PEEK shaft, 0 to 100°C Electrode
$293.55
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Mettler Toledo® IInLab® Expert Pro ISM 30014096 Premium 4-in-1 Open junction, PEEK shaft, 0 to 100°C with Intelligent Sensor Management Electrode
$347.70
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Mettler Toledo® InLab® Power 51343110 Premium 2-in-1 Pressurized reference system SteadyForce™ Electrode
$508.25
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Mettler Toledo® InLab® Power 51344211 Premium 4-in-1 Pressurized reference system SteadyForce, ATC with ISM Electrode
$636.50
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Mettler Toledo® InLab® Power 51343010  Economy 2-in-1 Gel-filled, polysulfone shaft Electrode
$168.15
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pH range 0 – 14 0 – 14 0 – 12 0 – 12 0 – 14
Temperature range 0 to 100 °C 0 to 100 °C 0 to 130 °C 0 to 130 °C 0 to 80 °C
Temperature probe - NTC 30 kΩ - NTC 30 kΩ -
Type of membrane glass U U A41 A41 U
Membrane resistance (25°C) < 250 MΩ < 250 MΩ < 600 MΩ < 600 MΩ < 250 MΩ
Type of junction Open junctions Open junctions Ceramic Ceramic Ceramic
Reference system ARGENTHAL™ with Ag+-trap ARGENTHAL™ with Ag+-trap SteadyForce™ SteadyForce™ ARGENTHAL™ with Ag+-trap
Reference electrolyte XEROLYT® Polymer XEROLYT® Polymer DPA-Gel DPA-Gel Gel
Cable and connection S7 1.2 m cable; BNC / RCA (Cinch) S7 MultiPin™ S7
Shaft material PEEK PEEK Glass Glass Polysulfone
Shaft length 120 mm 120 mm 120 mm 170 mm 120 mm
Shaft diameter 12 mm 12 mm 12 mm 12 mm 12 mm
InLab® Expert NTC30 The InLab® Expert Pro is also available with a MultiPin™ connector: Order number 51343104
InLab® Easy BNC The InLab® Easy is also available with a 1.2 m cable (BNC): Order number 51343011
Common specifications Type of electrode: pH-combination / Shaft diameter: 12 mm



Specialist Micro pH Glass Electrodes

Nothing is Impossible Sensors for Small Volumes

The more precious or limited the sample, the greater the challenge to use it for analysis. The narrow sensor shaft of micro pH sensors fits in nearly every sample container and enables measurements of sample volumes down to the lower ìL ranges.

The InLab Ultra-Micro-ISM allows pH measurements of sample volumes down to 15 ìL. Key for any lab working with expensive or precious micro samples

Model Ultra-Micro-ISM
30244732
Micro
51343160
Micro Pro-ISM
51344163
Semi-Micro
51343165
Flex-Micro
51343164
Price
$375.25
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Mettler Toledo® InLab® Micro 51343160 Specialist 2-in-1 3 mm shaft diameter Electrode
$300.20
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Mettler Toledo® InLab® Micro Pro-ISM 51344163 Specialist 4-in-1 5 mm shaft diameter, with ATC and ISM Electrode
$527.25
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Mettler Toledo® InLab® Semi-Micro 51343165 Specialist 2-in-1 6 mm shaft diameter Electrode
$300.20
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Mettler Toledo® InLab® Flex-Micro 51343164 Specialist 2-in-1 Epoxy shaft Electrode
$439.85
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pH range 1 - 11 0 – 14 0 – 14 0 – 12 0 – 14
Temperature range 0 to 80 °C 0 to 80 °C 0 to 100 °C 0 to 100 °C 0 to 80 °C
Temperature probe - - NTC 30 kΩ - -
Type of membrane glass LoT U U A41 U
Membrane resistance (25°C) < 700 MΩ < 1000 MΩ < 300 MΩ < 600 MΩ < 600 MΩ
Type of junction Ceramic Ceramic Ceramic Open junction Porous PTFE
Reference system ARGENTHAL™ with Ag+-trap ARGENTHAL™ with Ag+-trap ARGENTHAL™ with Ag+-trap ARGENTHAL™ with Ag+-trap ARGENTHAL™ with Ag+-trap
Reference electrolyte FRISCOLYT-B® 3 mol/L KCl 3 mol/L KCl XEROLYT®EXTRA Polymer Gel
Cable and connection MultiPin™ S7 MultiPin™ S7 1.0 m cable; BNC
Shaft material Glass Glass Glass Glass Epoxy
Shaft length 40 mm 60 mm 130 mm 100 mm 180 mm
Shaft diameter 3 mm 3 mm 5 mm 6 mm 6 mm
Shaft diameter 15 µL 45 µL 100 µL 100 µL 500 µL
Common specifications Type of electrode: pH-combination



Specialist Solid pH Glass Electrodes

Accept the Challenge Sensors for Solid and Viscous Samples

The measurement of solid or semi-solid samples is challenging and requires sensors that are robust, ensure proper electrolyte flow and are easy to clean. Sensors with these properties are often requested for food or cosmetic applications.

The pH value is an indicator for the ripeness of fruits. Thanks to the puncture electrode InLab Solids it is possible to measure where it counts: directly in the fruit. Strawberries taste best at a pH of 3.5.

Model Solids
51343153
Solids Pro-ISM
51344155
Viscous
51343150
Viscous Pro-ISM
51343151
Surface
51343157
Surface Pro-ISM
30249570
Price Mettler Toledo® InLab® Solids 51343153 Specialist 2-in-1 Spear tip Electrode
$340.10
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Mettler Toledo® InLab® Solids Pro-ISM 51344155 Specialist 4-in-1 Spear tip, ATC probe with ISM Electrode
$412.30
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Mettler Toledo® InLab® Viscous 51343150 Specialist 2-in-1 SteadyForce™, special thin tip Electrode
$527.25
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Mettler Toledo® InLab® Viscous Pro ISM 51343151 Specialist 4-in-1 SteadyForce™, specialized thin tip, ATC with ISM Electrode
$655.50
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Mettler Toledo® InLab® Surface 51343157 Specialist 2-in-1 SteadyForce™, special thin tip Electrode
$281.20
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Mettler Toledo® InLab® Surface Pro-ISM 30249570 Specialist 4-in-1 SteadyForce™, specialized thin tip, ATC with ISM Electrode
$401.85
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pH range 1 - 11 1 - 11 0 – 14 0 – 14 1 - 11 1 - 11
Temperature range 0 to 80 °C 0 to 80 °C 0 to 130 °C 0 to 130 °C 0 to 50 °C 0 to 50 °C
Temperature probe - NTC 30 kΩ - NTC 30 kΩ - NTC 30 kΩ
Type of membrane glass LoT LoT HA HA LoT LoT
Membrane resistance (25°C) < 250 MΩ < 250 MΩ < 600 MΩ < 600 MΩ < 800 MΩ < 800 MΩ
Type of junction Open junction Open junction Ceramic Ceramic Ceramic ring Ceramic ring
Reference system ARGENTHAL™ with Ag+-trap ARGENTHAL™ with Ag+-trap SteadyForce™ SteadyForce™ ARGENTHAL™ with Ag+-trap ARGENTHAL™ with Ag+-trap
Reference electrolyte XEROLYT®EXTRA Polymer XEROLYT®EXTRA Polymer FRYSCOLYT-C® FRYSCOLYT-C® 3 mol/L KCl 3 mol/L KCl
Cable and connection S7 MultiPin™ S7 MultiPin™ S7 MultiPin™
Shaft length 25 mm 25 mm 40 mm 40 mm 120 mm 120 mm
Shaft length 6 mm 6 mm 6 mm 6 mm 12 mm 12 mm
Common specifications Type of electrode: pH-combination / Shaft material: Glass



Specialist Low Temperatures pH Glass Electrodes

Pure Performance Low Temperatures and Ionic Strenght

A special membrane glass and a large membrane surface are typical characteristics for sensors suited for measuring in samples at low temperatures or with low ion concentrations. One of the key areas of application is the measurement of pure water at various levels of purity.

Pure water is a key ingredient in every pharmaceutical production process. The InLab Pure Pro-ISM convinces with a strong performance in weak ionic strength samples.



Reach New Depths Long Sensors

The deeper the container, the more difficult it gets to reach the sample. Sensors with especially long and robust shafts are required for proper pH measurements in very deep or narrow containers

From the chalk board to experimental reactions to ultimately the final formulation. The extra-long InLab Reach sensors are a solid companion during the whole scale-up process in the pilot production

Model Pure
30248112
Pure Pro-ISM
51344172
Cool
51343174
Cool Pro-ISM
30247850
Hydrofluoric
51343176
Reach Pro-425
51343061
Price Mettler Toledo® InLab® Pure 30248112 Specialist 2-in-1 For use in pure water or low ionic strength solutions  Electrode
$368.60
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Mettler Toledo® InLab® Pure Pro-ISM 51344172 Specialist 4-in-1 For use in pure water or low ionic strength solutions, with ATC and ISM  Electrode
$494.00
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Mettler Toledo® InLab® Cool 51343174 Specialist 2-in-1 FRISCOLYT-B electrolyte, –30 to 80°C  Electrode
$368.60
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Mettler Toledo® InLab® Cool Pro-ISM 30247850 Specialist 4-in-1 For low temperature measurement, with ATC and ISM  Electrode
$438.90
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Mettler Toledo® InLab® Hydrofluoric 51343176 Specialist 2-in-1 Special HF resistant membrane  Electrode
$401.85
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Mettler Toledo® InLab® Reach Pro-425 Pro-ISM 51343061 Specialist 4-in-1 For low temperature measurement, with ATC and ISM  Electrode
$465.50
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pH range 1 - 11 1 - 11 1 - 11 1 - 11 1 - 11 1 - 14
Temperature range 0 to 80 °C 0 to 80 °C -30 to 80 °C -30 to 80 °C 0 to 100 °C 0 to 100 °C
Temperature probe - NTC 30 kΩ - NTC 30 kΩ - NTC 30 kΩ
Type of membrane glass LoT LoT LoT LoT HF HA
Membrane resistance (25°C) < 50 MΩ < 50 MΩ < 50 MΩ < 50 MΩ < 100 MΩ < 600 MΩ
Type of junction Immovable glass sleeve Immovable glass sleeve Immovable glass sleeve Immovable glass sleeve Ceramic Ceramic
Reference electrolyte FRYSCOLYT-B® 3 mol/L KCl FRYSCOLYT-B® FRYSCOLYT-B® 3 mol/L KCl 3 mol/L KCl
Bridge electrolyte - 1 mol/L KCl - - - -
Cable and connection S7 MultiPin™ S7 MultiPin™ S7 MultiPin™
Shaft material Glass Glass Glass Glass Glass Glass
Shaft length 120 mm 170 mm 120 mmm 120 mm 120 mm 425 mm
Common specifications Type of electrode: pH-combination / Reference system: ARGENTHAL™ with Ag+-trap / Shaft diameter: 12 mm


ORP Electrodes

High Potential ORP Electrodes

Sensors that measure ORP (oxidation reduction potential) have to cope with similar challenges as pH sensors. Thus, the correct combination of reference system, junction, and shape are of equal importance for successful ORP measurements.

Fluffy bread with a crispy crust requires a well-controlled baking process. The InLab Redox allows bakeries to control the fermentation process of dough in an easy and efficient way.

Model InLab® Redox
51343200
InLab® Redox Flow
51343201
Redox Au
51343204
Redox Ag
51343205
Price Mettler Toledo® InLab® Redox 51343200 ORP electrode Platinum Ring
$285.95
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Type of electrode Combined ORP Combined ORP Combined ORP Combined ORP
Temperature range 0 to 100 °C 0 to 100 °C 0 to 100 °C 0 to 100 °C
Type of junction Ceramic Moveable glass sleeve Ceramic Ceramic
Reference electrolyte 3 mol/L KCl 3 mol/L KCl 3 mol/L KCl 3 mol/L KNO3
Shaft length 120 mm 120 mm 120 mm 120 mm
Shaft diameter 12 mm 12 mm 12 mm 12 mm
Metal Platinum ring Platinum ring Gold ring Silver ring
Storage 3 mol/L KCl 3 mol/L KCl 3 mol/L KCl 3 mol/L KNO3
Cable and connection S7 S7 S7 S7
Reference system ARGENTHAL™ with Ag+-trap ARGENTHAL™ with Ag+-trap ARGENTHAL™ with Ag+-trap ARGENTHAL™ with Ag+-trap
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