Pi’s Charge Analyzer for the determination of charge demand at the wet end of a paper machine accurately measures colloidal and ionic charge using the streaming current principle (electrokinetic charge), which is comparable to zeta potential. Charge demand is determined with polyelectrolyte titration to the isoelectric point, either manually or by use of an automatic titrator.

ChargeSense Charge Analyzer

ChargeSense Charge Analyzer

Pi’s ChargeSense Charge Analyzer is intuitive, flexible and gives great repeatable charge demand determinations time after time.

The ChargeSense is an essential tool for papermaking allowing fast determination of the wet end charge demand.

Pi’s ChargeSense Charge Analyzer measures the streaming current produced by colloidal/dissolved species in a sample taken from various points on the wet end of the papermaking process, and allows for an automatic titration with built in titration pumps and routines. The charge demand result is then expressed as either microequivalents per litre (μeq/L) or parts per million (ppm).

A very important feature is the large sample size capacity which allows the user to accurately titrate samples of varying sizes using undiluted coagulant (requires micro-pipette), which is the recommended method when feeding PolyDADMAC. Large samples provide for more accurate results and one more representation of the charge demand.

Accommodates Multiple Sample Sizes

Accommodates Multiple Sample Sizes

Standard Features

  • LabTrac – accompanying software for extracting and analyzing titration data
  • Sample volume range of 200-2000ml for greatest accuracy
  • Sensitivity adjustment for highly conductive samples
  • Measures charge and charge demand
  • Sturdy housing for easy mobility, quick set-up, and bench-top stability
  • Low maintenance, improved reliability
  • Detachable probe and piston to facilitate cleaning and prevent corrosion
  • Gain control to amplify low level signals
  • Zero offset to customize data sets
  • Clear display
  • Adjustable stand

Adjustable Stand

Adjustable Stand

In addition to the features listed above, the ChargeSense Charge Analyzer has the following additional features:

  • Built-in titrator, two titrant pumps
  • Cationic and anionic titration
  • pH measurement
  • Temperature measurement

The ChargeSense is particularly suitable for paper applications including:

  • Tissue
  • Fine paper
  • Speciality papers
  • Coated papers
  • Linerboard
  • Newsprint

Charge Analyzer Screen - Titration Results

Charge Analyzer Screen – Titration Results

The ChargeSense is equipped with two titrant pumps allowing for automatic switching between cationic and anionic titrants depending on the sample’s charge.

Charge Analyzer Screen - SCV with pH

Charge Analyzer Screen – SCV with pH

Knowing the pH of the samples, the titrate can give more information to the well informed papermaker. pH measurement is included on ChargeSense.

Document Type Size
ChargeSense Brochure 585kB
Laboratory Based and Portable Analyzers Technical Note 652kB

Focus Ons are a series of short articles distributed by email providing technical information regarding instrumentation, process measurement in potable, waste, process and pool waters. If you would like to join the mailing list, please contact us.

Process Instruments (Pi) is known for making the best online Water Quality Analyzers on the market. However, did you know…

… that Pi also supplies stand alone laboratory based analyzers for determining coagulant dose in 5 minutes?
… that Pi also manufactures and supplies portable versions of some of their online water analyzers?

This Focus On will highlight some of the features of Pi’s LabSense and ChargeSense Laboratory Charge Analyzers and Pi’s UV254 Portable Meter.

LabSense 1 Charge Analyzer

LabSense 1


Pi’s range of LabSense Laboratory Charge Analyzers are an essential coagulation optimization tool for water treatment. LabSense allows the user to determine the ideal coagulant dosage needed to achieve optimum NTU and TOC reduction in typically less than 5 minutes, earning it the description “5 minute jar tester”.

How does it work?

Based on streaming current technology, the LabSense titrates a sample of raw water to determine the dose of coagulant required to achieve charge neutralization. The LabSense, which has been shown to be an accurate approximation for coagulant dosage, is proving an invaluable tool for a Water Process Scientist with the responsibility to optimize coagulant dosage often on rapidly changing water sources where jar testing can just take too long.

ChargeSense Charge Analyzer


For more details about Pi’s LabSense Laboratory Charge Analyzers, click here.


Pi’s ChargeSense Laboratory Charge Analyzer is an essential tool for papermaking allowing fast determination of wet end charge demand.

How does it work?

ChargeSense measures the streaming current produced by colloidal/dissolved species in a sample taken from various points on the wet end of the papermaking process, and allows for a titration with a poly-electrolyte titrant to bring the sample’s charge to zero. The charge demand result is then expressed as either microequivalents per liter (µeq/L) or parts per million (ppm).

UV254 Portable

UV254 Portable UV254 Analyzer

UV254 Portable

With the UV254 Portable range of UV254 handheld meters you get a simple and reliable means of testing any water for UV transmittance (UVT) and UV absorbance (UVA). Used to provide quick (less than 1 min) information on site, the UV254 Portable provides an invaluable tool to water treatment engineers, essential for verifying an online analyzer reading or as an independent measurement.

How does it work?

The Pi UV254Sense Portable for the measurement of UV254 absorbance and UV254 transmission can provide testing in both units of UVT and UVA, and any of the meters can be equipped with our optional battery pack feature, allowing the meter to truly go anywhere, anytime.

The patented Split-Sensor technology also allows for the unique ability to remember the meter’s calibration, eliminating the need to calibrate (zero) the meter to a known pure (DI) water source before taking a measurement. This improves ease of use in the field for performing rapid grab sample testing of various water sources.

For more details about Pi’s UV254Sense range of analyzers, click here.

Contact us on...

Julius Guth
Head of Central Offices

"Get in touch with me. I'm here to help you"

Tel: +44 (0)7497 861662
Email: julius.guth@processinstruments.net

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