Polilyte Plus XP 120

Part # 238811

The Polilyte Plus XP is a robust, maintenance-free pH sensor from Hamilton, engineered for demanding industrial applications such as chemical processing, petrochemical operations, process water, and wastewater treatment, ensuring reliable performance in challenging environments.

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Polilyte Plus XP Details

The Polilyte Plus XP is a robust, maintenance-free pH sensor engineered for demanding industrial environments like chemical processing, wastewater treatment, and petrochemical operations. Its polymer electrolyte and dual Single Pore junctions minimize clogging and ensure stable measurements, even in low conductivity media. 

Featuring the Everef-L reference system and optional integrated Liquid Earth (VP connection) for enhanced signal stability, the sensor offers reliable, long-term performance. With ATEX and IECEx approvals, it’s also ideal for hazardous areas.

Common applications Water, Energy, & Environment, Water and Wastewater, Chemical Processes, Basic Chemicals, Agri-Food and Beverage

Maintenance-Free Design

Elimination of clogging with two single pore junctions.

Robust Performance

Good performance in highly alkaline solutions and in samples with low conductivity.

  • Hamilton pH sensors are characterized by their high measuring accuracy and long service life.

    Hamilton pH sensors are characterized by their high measuring accuracy and long service life. This contributes significantly to the control of our processes. They also help us to guarantee the required product quality and to further optimize processes.

    Felix Colin
    Bioprocess Engineer, AB Enzymes GmbH

  • The measurement technology from Hamilton is hard to beat in terms of its measurement accuracy and reliability.

    The measurement technology from Hamilton that is used in our brewery is hard to beat in terms of its measurement accuracy and reliability. The planning security and cost stability with the subscription is very attractive and important to us. Hamilton offers great support and is always open to customer requests.

    Holger Bruckes
    Deputy head of Quality Assurance Mönchengladbach Brewery, Branch of OETTINGER Brewery GmbH

  • I could not be more pleased with my experience with Hamilton!

    My company has been using Hamilton probes for years and have always been happy with their performance! The team is always very helpful in trouble shooting issues and answering any questions that we may have about our probes. Overall, I could not be more pleased with my experience with Hamilton!

    Abigail Mann
    Bioprocessing Fermentation Associate at Heliae Development

Polilyte Plus XP 120 Specifications

Print
Process Connection PG13,5
Wetted Parts GΙass
FKM (Fluorocarbon Elastomer)
pH Glass Hamilton Type H Glass
a-length 120 mm
Measuring Range pH 0 to 14
Electrolyte Polisolve Plus
Sensitivity 57 to 59 mV / pH at 25 °C
Zero Point 0 ± 20 mV
pH Glass Resistance Moderate
Membrane Shape Spherical
Diaphragm Single Pore
Number of Diaphragms 2
Reference System Hamilton Everef-L
O-ring Material FDA 21 CFR 177.2600; EC 1935/2004; USP <87>; USP <88> Class VI (121 °C)
Serial Number Yes
Recommended Storage Hamilton Storage Solution or 3 M KCl
Certificate Yes, with measured values in Buffer pH 4.01 and pH 7.00
ATEX Approval II 1/2 G Ex ia IIC T4/T5/T6 Ga/Gb; II 1/2 D ia IIIC T x °C Da/Db
IECEx Approval II 1/2 G Ex ia IIC T4/T5/T6 Ga/Gb; II 1/2 D ia IIIC T x °C Da/Db
Diameter 12 mm
Autoclavable Yes
Steam Sterilizable Yes
CIP No
Operating Temperature Range 0 to 130 °C
Sample min Conductivity 2 µS/cm
Pressure Range bar g 0 to 50 bar (60°C), 0 to 20 bar (100 °C), 0 to 16 bar (130°C)
Electrical Connector S8
Liquid Earth No
Temperature Sensor No

Polilyte Plus XP 120 Resources

Browse app notes, user guides, specification documents, and more in our Knowledge Center.

Browse app notes, user guides, specification documents, and more in our Knowledge Center.

Browse app notes, user guides, specification documents, and more in our Knowledge Center.

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Article

Common Questions for Autoclave Sterilization of Sensors

This brief article examines common questions from end-users about best practices for autoclaving Hamilton sensors.
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Article

Warnings and Errors with Arc pH / ORP Sensors

The advanced diagnostics of Hamilton Arc pH / ORP sensors are indicated by warnings and errors. This article dives into the different types of warnings and errors as well as how they are defined.
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Article

Understanding Wetted Materials (Stainless, Plastics, & Elastomers)

Wetted materials such as stainless steel, plastics, and elastomers are often listed by different names and abbreviations in different parts of the world. This quick cross reference guide helps sort out the common names for wetted materials used in Hamilton sensors.

Browse app notes, user guides, specification documents, and more in our Knowledge Center.

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FAQ

What is a polymer-filled sensor and why would I choose it?

Polymer-filled sensors use solid (or nearly solid) electrolyte. This design keeps electrolyte from flowing out of the sensor and process liquid from poisoning or clogging the sensor. Polymer filled sensors are a great choice for industrial applications with strong chemicals, particulates and elevated pressures.
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FAQ

What is the difference between ORP and Redox?

They are the same. Redox is a shortened word for “Reduction Potential”. ORP is shortened for “Oxidation Reduction Potential”. The sensor and measurement is the same.
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FAQ

What is the effect of temperature on ORP?

Temperature compensation is a common requirement for accurate pH measurements, but not generally used for ORP. Why? pH is a measurement of the hydrogen ion concentration by the glass membrane. The voltage output of this glass membrane is temperature dependent, as is the hydrogen ion activity in the liquid. Temperature compensation will correct the pH voltage output back to a standardized 25°C. ORP differs from pH as it is not tied to a specific ion. The effects of temperature can be different depending on oxidizing and reducing substances present in the liquid. Due to this uncertainty, the ORP sensor output is uncompensated millivolts.
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