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Water Quality Analysers - Global Suppliers

Chlorine analysers, pool controllers, suspended solids analyzers and online pH meters are just a few of the products that we manufacture and sell across the world. Please complete a contact form or telephone us now so that we can put you in touch with your local sales outlet. Pi is a global supplier and will have a distributor in your area.

Residual Chlorine Analyzer - HaloSense

Cronos HaloSense

"The Residual Chlorine Analysers from Pi are the best we've ever used" Dr Lester Simmonds, UK

Compared to other market leading residual chlorine analyzers the HaloSense range (including a total chlorine analyzer, a free chlorine analyzer and a chloramine analyzer) gives you:

  • Reagent free - lower cost of ownership
  • A range of controllers - pay for what you need, no more, no less
  • Remote access via GSM - your expert can be on site, wherever they are

Dissolved Oxygen Meter - OxySense

Dissolved Oxygen Monitor

"Simply the best DO sensor I've used" Jon Shan, USA

The CRIUS® OxySense Optical Dissolved Oxygen Monitor is for use in aeration lanes and oxidation ditches to control air blowers. Enhanced with a Pi self cleaning and self verification end cap (Pat pending), the CRIUS® OxySense DO Meter is a true market leader!

  • No chemicals or moving parts
  • Optional self-cleaning sensor and self-verification
  • Stability and reliability - excellent process control
  • Suitability for all Dissolved Oxygen applications
  • Up to 12 months between maintenance
  • Up to 12 months between calibration

Chlorine Dioxide Analyzer - DioSense

DioSense

"These are the best chlorine dioxide sensors we've ever used and we've tested most" Alistair Cameron, UK

The DioSense range of Chlorine Dioxide Analyzers and Chlorine Dioxide Monitors utilise the very latest and best chlorine dioxide sensors available in the world. It is a membraned device which is insensitive to chlorine, uses no reagents, is extremely stable, with reduced maintenance and reduced whole life costs.

  • Lower cost of ownership
  • Stable and reliable
  • Suitable for all potable and process waters
  • Tolerant of water containing detergents

Turbidity Meter / Suspended Solids Monitors - SoliSense

SoliSense Suspended Solids In-line Tip

The Solisense® Turbidity Meter, Suspended Solids Monitor is designed for use in industry as well as in WwTW's and is suitable for monitoring potable water, mixed liquor suspended solids, return activated sludge, centrates, filtrates, thickeded sludge, and much more! With its sophisticated sensor ranging from 0.02 NTU (FTU) to 8% solids, the Solisense® Turbidity Meter, Suspended Solids monitor is the ideal online process monitor solution.


  • Autoclean optical sensor
  • Stability and reliability
  • Suitability for all potable, waste and process waters
  • Up to 6 months between maintenance
  • From 0.02 NTU to 8% Solids

Pool Controller - AquaSense

Pool Controller

"Since installing two CRIUS AquaSense in 2008, our control over the pool chemistry has greatly improved leading to a better bathing experience for our customers" Alistair Cameron, UK

The AquaSense Swimming Pool Controller and Spa Controller measures the pool chlorine levels and then controls the chlorine and pH levels by controlling the chemical dosing. The AquaSense advanced swimming pool chlorine controllers offer bufferless and reagentless operation.

  • Lower cost of ownership
  • Stable and reliable
  • SMS text alarms
  • Remote Access via Internet

Conductivity Meter - ConductiSense

SoliSense Suspended Solids In-line Tip

The ConductiSense range of online conductivity meters from Pi utilise the very latest and best conductivity sensors available in the world today for measuring the online conductivity of any aqueous solution. The ConductiSense sensors and accessories are available with different controllers giving you the same great performance with different communication, display, and control options.With the ConductiSense range of Conductivity Monitors, you get everything that you need - and nothing that you don't.


  • Resists coating, corrosion and fouling
  • Durable Noryl construction
  • Easy installation
  • Low purchase cost
  • Custom tee for in-line mounting

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