What is the primary advantage of an in-line pH electrode?

In-line electrodes provide continuous, real-time pH measurement directly within a process stream, eliminating the need for manual sampling and laboratory analysis.

Why is temperature compensation important for pH measurement?

pH values are temperature-dependent. Integrated temperature compensation ensures accurate pH readings across varying process temperatures by correcting for the electrode's response.

Can this type of electrode be used in hazardous environments?

Many industrial pH electrodes, including this model, are available with certifications (e.g., ATEX, IECEx) for safe use in potentially explosive atmospheres. Buyers should confirm specific certifications with the seller.

What maintenance does an industrial pH electrode typically require?

Maintenance commonly involves periodic calibration, cleaning to prevent fouling, and eventual replacement of the electrode as its performance degrades over time.

What does the 'VP' connector signify?

The 'VP' (VarioPin) connector is a common industrial standard for pH electrodes, designed for robust, secure, and reliable electrical connections in demanding process environments.

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Mettler ToledoInpro 3253/120/PT1000 pH Electrodes

Used Mettler ToledoInpro 3253/120/PT1000 pH Electrodes - pH Meters & Sensors, photo 1

Used Mettler ToledoInpro 3253/120/PT1000 pH Electrodes - pH Meters & Sensors, photo 2

Used Mettler ToledoInpro 3253/120/PT1000 pH Electrodes - pH Meters & Sensors, photo 3

Used Mettler ToledoInpro 3253/120/PT1000 pH Electrodes - pH Meters & Sensors, photo 4

Used Mettler ToledoInpro 3253/120/PT1000 pH Electrodes - pH Meters & Sensors, photo 5

Used Mettler ToledoInpro 3253/120/PT1000 pH Electrodes - pH Meters & Sensors, photo 6

Used Mettler ToledoInpro 3253/120/PT1000 pH Electrodes - pH Meters & Sensors

used Equipment

Available

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Mettler Toledo - Mettler ToledoInpro 3253/120/PT1000 pH Electrodes

Name: Mettler ToledoInpro 3253/120/PT1000 pH Electrodes
Brand: Mettler Toledo
SKU: 3146A SR.BLS02
Price: 175 GBP
Availability: InStock

Price: £ 175

This item is unused and in the original packaging.

We have a quantity available.

The InPro 3253SG 120/PT1000 is an in-line industrial pH electrode (probe) intended for continuous process measurement rather than simple lab spot checks.

It integrates both the pH sensing element and temperature compensation in a single unit, allowing accurate, real-time pH measurement in process lines, tanks, fermenters and reactors.

Physical & Mechanical

Sensor shaft length: ~120 mm — relatively short, good for installations with limited insertion depth.
Process connection: Pg 13.5 threaded connection.
Connector type: VP industrial connector for secure integration.
Pressure rating: Up to ~4 bar gauge.

Temperature & Compensation

Built-in PT1000 temperature sensor — provides temperature compensation for accurate pH reading.
Operating range: ~0 °C to ~100 °C.

Sensing & Reference System

Glass pH sensing membrane with a pre-pressurized liquid electrolyte system — lowers maintenance and improves stability.
Ceramic diaphragm — stable reference junction.
Argenthal silver-ion trap cartridge — improves reference performance, especially in environments containing sulfides.

Sterilisation & Hygiene

Sterilisable/autoclavable — built to withstand repeated steam sterilization or autoclave cycles without losing calibration or performance.

Certifications & Approvals

Typically supplied with industrial and safety certifications (e.g., ATEX, IECEx and CE) for use in hazardous zones and hygienic processing.

pH Range

Suitable for pH measurement typically within 0 to 12 (depending on membrane type).

Summary

In essence, the Mettler Toledo InPro 3253/120/PT1000 is a high-performance industrial pH electrode designed for robust, low-maintenance in-line monitoring with integrated temperature compensation, suitable for sterilizable and process‐critical environments.

Its pre-pressurized reference and rugged build help deliver stable pH measurements in demanding applications.

Cambridgeshire, United Kingdom

5,773 km away

Model Number

InPro 3253/120/PT1000

Stock Number

3146A SR.BLS02

Machinery Masters View

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

Monitoring pH in fermentation processes within breweries and pharmaceutical manufacturing.
Controlling pH levels in wastewater treatment plants to ensure regulatory compliance.
Measuring pH in chemical reactors for process optimisation and quality control.
Ensuring stable pH in food and beverage production lines, such as dairy or soft drinks.
Continuous pH monitoring in industrial water treatment systems, including boiler feed water.

Sensor Type: Typically a combined pH electrode with integrated temperature compensation.
Measurement Range: Commonly 0-14 pH, suitable for a wide range of acidic to alkaline solutions.
Temperature Sensor: Units of this type commonly feature an integrated PT1000 for accurate temperature compensation.
Process Connection: Often a Pg 13.5 threaded connection for secure in-line installation.
Operating Temperature: Typically designed for process temperatures ranging from approximately 0°C to 100°C.
Pressure Rating: Units in this class are commonly rated for pressures up to around 4 bar gauge.
Electrolyte System: Often features a pre-pressurised liquid electrolyte system for enhanced stability and reduced maintenance.
Sterilisation Capability: Many industrial pH electrodes are sterilizable/autoclavable for hygienic applications.

In-line electrodes provide continuous, real-time pH measurement directly within a process stream, eliminating the need for manual sampling and laboratory analysis.

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.