Name: pH Sensor InPro4281i/SG/425
Brand: Mettler Toledo

Withstands Demanding Applications

The InPro 4281i uses a polymer reference system and a titanium shaft for reliable pH measurement, even under difficult industrial conditions.

Advanced Predictive Diagnostics

This pH sensor has Intelligent Sensor Management (ISM) technology, offering predictive diagnostics to reduce maintenance and simplify calibration.

Accurate pH Measurement

The InPro 4281i provides a wide measurement range from 1-14 pH and has a solution ground for enhanced stability.

Eliminates Clogging & Resists Poisons

The InPro 4281i features an open junction Argenthal reference system with a Xerolyt® Extra polymer electrolyte that eliminates sensor clogging and ensures the sensor is resistant to poisoning, solvents, and strongly acidic or basic conditions.

Optimizes Maintenance Cycles

This pH sensor features intelligent diagnostics to help manage your maintenance. The sensor provides a clear display of its remaining lifetime, time remaining until calibration is needed and indicates when the sensor will need to be cleaned.

Suitable for Hazardous Conditions

The InPro 4281i is ATEX and FM certified for hazardous areas. It can withstand temperatures up to 176°F (80°C) and has a titanium shaft to resist the daily knocks of industrial manufacturing.

Fast Replacement of Sensors

Ensure the safety of the maintenance team with the ability to Plug & Measure. The InPro 4281i can be calibrated away from the process and then quickly swapped into the process environment without the need to recalibrate.

Specifications - pH Sensor InPro4281i/SG/425

ISM (Digital) or Analog	ISM (Digital)
pH Sensing Technology	Glass Membrane Suitable For Low Temperatures (LoT)
pH Range	1 – 14
Reference System	Xerolyt® polymer electrolyte, open double junction, Argenthal cartridge with silver-ion trap
Operating Temperature (Fahrenheit)	32 °F - 176 °F
Operating Temperature (Celsius)	0 °C - 80 °C
Cable Connector	K8S
Process Connection	Pg 13.5 Thread
Sterilizable/Autoclavable	No
Sensor Length	425 mm
Certificates & Approvals	ATEX/IECEx: Ex ia IIC T6/T5/T4/T3 Ga/Gb CE FM: IS Cl. I, II, III, Div 1, GR ABCDEFG/T6 METTLER TOLEDO Quality Certificate PED
Operating Pressure (Bar)	0 to 15 barg @ 25°C
Model Family	InPro4260(i)
Temperature Sensor	Digital
Measurement Parameter	pH
Shaft Material	Titanium
Operating Pressure (PSI)	0 to 217 psig @ 77°F
Solution Ground/Redox Metal	Titanium
Refillable Electrolyte	No
Hazardous Area Approvals	Yes
Primary Media/Application	Chemical Processes
Hygienic/Biocompatibility Approvals	No

Material No.: 52300383

Computer Accessory iLink Multi

Material No.: 30130631

Sensor Simulation & Validation

ISM Simulator pH Kit

Simulating ISM sensors

Material No.: 52300410

Buffers for In-Line pH Sensors

Technical Buffer pH 2.00 6x250ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This package contains six bottles of 250mL of pH 2.00 buffer solution.

Material No.: 51319010

Technical Buffer pH 2.00 1000ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single bottle contains 1000 mL of pH 2.00 buffer solution.

Material No.: 51319011

Technical Buffer pH 4.01 6x250ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This package contains six bottles of 250mL of pH 4.01 buffer solution.

Material No.: 51340058

Technical Buffer pH 4.01 1000ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single bottle contains 1000 mL of pH 4.01 buffer solution.

Material No.: 51340228

Technical Buffer pH 7.00 6x250ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This package contains six bottles of 250mL of pH 7.00 buffer solution.

Material No.: 51340060

Technical Buffer pH 7.00 1000ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single bottle contains 1000 mL of pH 7.00 buffer solution.

Material No.: 51340229

Technical Buffer pH 9.21 6x250ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This package contains six bottles of 250mL of pH 9.21 buffer solution.

Material No.: 51300194

Technical Buffer pH 9.21 1000ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single bottle contains 1000 mL of pH 9.21 buffer solution.

Material No.: 51340230

Technical Buffer pH 10.00 6x250ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This package contains six bottles of 250mL of pH 10.00 buffer solution.

Material No.: 51340231

Technical Buffer pH 10.00 1000ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single bottle contains 1000 mL of pH 10.00 buffer solution.

Material No.: 51340232

Buffer pH 4.01 ACS red 5000ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single container holds 5000 mL of pH 4.01 buffer solution.

Material No.: 51319012

Buffer pH 7.00 ACS green 5000ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single container holds 5000 mL of pH 7.00 buffer solution.

Material No.: 51319016

Buffer pH 9.21 ACS blue 5000ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single container holds 5000 mL of pH 9.21 buffer solution.

Material No.: 51319017

Technical Buffer pH 2.00 250ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single bottle contains 250 mL of pH 2.00 buffer solution.

Material No.: 51340055

Technical Buffer pH 4.01 250ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single bottle contains 250 mL of pH 4.01 buffer solution.

Material No.: 51340057

Technical Buffer pH 7.00 250ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single bottle contains 250 mL of pH 7.00 buffer solution.

Material No.: 51340059

Technical Buffer pH 9.21 250ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single bottle contains 250 mL of pH 9.21 buffer solution.

Material No.: 51300193

Technical Buffer pH 10.00 250ml

Certified and traceable pH buffer solution for sensor calibration and verification in life science and industrial applications. This single bottle contains 250 mL of pH 10.00 buffer solution.

Material No.: 51340056

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