What is the primary benefit of a pre-pressurised pH sensor?

A pre-pressurised design helps to prevent process media from entering the reference system, extending sensor lifespan and reducing maintenance, particularly in fluctuating pressure environments.

Why is a built-in PT1000 temperature sensor important for pH measurement?

pH values are temperature-dependent. A built-in PT1000 allows for automatic temperature compensation, ensuring accurate and reliable pH readings across varying process temperatures.

Can this sensor be used in applications requiring frequent sterilisation?

Yes, units of this type are typically designed to be sterilizable/autoclavable, making them suitable for repeated steam sterilization or autoclaving cycles without significant performance degradation.

What does the Argenthal cartridge with a silver-ion trap achieve?

The Argenthal cartridge with a silver-ion trap is designed to improve performance and extend sensor life in applications where the process media contains sulfides or other substances that can poison conventional silver/silver chloride reference systems.

What kind of maintenance is typically required for this type of pH sensor?

These are generally low-maintenance sensors due to their pre-pressurised, liquid-filled design. Regular calibration and cleaning, as per manufacturer guidelines, are usually the main maintenance requirements.

Is this sensor suitable for outdoor or harsh industrial environments?

While the sensor itself is robust, its suitability for specific harsh industrial or outdoor environments depends on the overall housing and installation. The sensor's design is optimised for demanding process conditions rather than external environmental factors.

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Mettler Toledo InPro (Unused Boxed) 3253/120/PT1000 Pre‑pressurized, liquid‑filled, low‑maintenance pH sensor

New Mettler Toledo InPro (Unused Boxed) 3253/120/PT1000 Pre‑pressurized, liquid‑filled, low‑maintenance pH sensor - pH Meters & Sensors, photo 1

New Mettler Toledo InPro (Unused Boxed) 3253/120/PT1000 Pre‑pressurized, liquid‑filled, low‑maintenance pH sensor - pH Meters & Sensors

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Mettler Toledo InPro (Unused Boxed) 3253/120/PT1000 Pre‑pressurized, liquid‑filled, low‑maintenance pH sensor

Name: Mettler Toledo InPro (Unused Boxed) 3253/120/PT1000 Pre‑pressurized, liquid‑filled, low‑maintenance pH sensor
Brand: Mettler Toledo
SKU: P104.3146A
Price: 140 GBP
Availability: InStock

Price: £ 140

These Items are unused and boxed in original Packaging.

Supplier Catalogue No. 52002567

The Mettler Toledo InPro 3253/120/PT1000 is a high‑performance in‑line pH sensor / electrode with some specific featuresA pre‑pressurized, liquid‑filled, low‑maintenance pH sensor.

It has a built‑in PT1000 temperature sensor for temperature compensation.

The sensor length (shaft) is 120 mm, which is relatively short, making it suitable for installations with limited insertion depth.

It is sterilizable/autoclavable and optimized for steam sterilization or autoclaving cycles.

That means it can withstand repeated sterilization without losing performance.

Reference system: pre‑pressurized liquid electrolyte, with a ceramic diaphragm, and includes an Argenthal cartridge with a silver‑ion trap (for better performance in environments with sulfides etc.)

It can handle pressures up to 4 bar gauge and works in the range 0 °C to 100 °C.

It has process connection thread of Pg 13.5, and its connector is of “VP” type

This sensor would be used in settings where real‑time, reliable pH measurement is needed under harsh or demanding conditions. Some examples:

Biopharmaceutical / biotechnology production, e.g. fermenters, bioreactors, where sterilisation (e.g. steam) is frequent and you need accurate pH control.
Hygienic food or beverage processing where cleaning and sanitisation/sterilisation are done in‑place (CIP / SIP).
Chemical processing, especially where pH may swing extreme and environment may be harsh (high/low pH, temperature, maybe some contaminants).
Water/wastewater treatment in situations needing durable, robust probe

Cambridgeshire, United Kingdom

5,773 km away

Model Number

InPro 3253/120/PT1000

Stock Number

P104.3146A

Machinery Masters View

Typical context for this category of equipment. Always confirm specifics with the seller.

Biopharmaceutical and biotechnology production, such as fermenters and bioreactors, requiring accurate pH control and frequent sterilisation.
Hygienic food and beverage processing where Clean-in-Place (CIP) and Sterilisation-in-Place (SIP) procedures are routinely performed.
Chemical processing environments, particularly those with extreme pH swings or challenging media.
Water treatment plants for monitoring and controlling pH levels in various stages of purification.
Laboratories and research facilities requiring precise and reliable pH measurement in demanding applications.

Measurement Range: Typically 0-14 pH, with this unit specified for 0-100 °C operation.
Temperature Compensation: Units of this type commonly feature integrated temperature sensors, such as the PT1000 in this model, for accurate compensation.
Pressure Rating: For this class of sensor, pressure ratings up to 4 bar gauge are common, as specified for this unit.
Process Connection: Pg 13.5 thread is a standard process connection for these sensors, allowing for straightforward integration.
Electrolyte System: Pre-pressurised liquid electrolyte systems are typical for low-maintenance pH sensors designed for demanding applications.
Sterilisation Capability: Sensors like this are commonly designed to be sterilizable/autoclavable, suitable for steam sterilization or autoclaving cycles.
Sensor Length: Shaft lengths vary; 120 mm, as on this unit, is considered relatively short, suitable for limited insertion depths.
Connector Type: VP (VarioPin) connectors are frequently used on Mettler Toledo sensors for robust and reliable connections.

A pre-pressurised design helps to prevent process media from entering the reference system, extending sensor lifespan and reducing maintenance, particularly in fluctuating pressure environments.

pH meters and sensors attract strong buyer interest in laboratory, biotech and pharmaceutical settings. Industry consensus values accuracy, calibration stability and sensor longevity as critical factors. Used units typically offer good value if maintained properly. Buyers prioritise checking calibration history, electrode condition and display functionality before purchase. Reputable brands retain performance well. Common strengths include reliable readings in controlled environments and straightforward operation, though sensors require regular maintenance and occasional replacement to sustain accuracy standards.

General overview for this equipment type

Machinery Masters Intelligence. General guidance for this category of equipment only, not a substitute for the seller's exact specifications. Always confirm details with the seller.