CRIUS Instrument Controller

CRIUS® Instrument Controller

Highest Quality – Low Cost – Superior Functionality

Part of a range of controllers, the CRIUS® is the big brother of the CRONOS® and offers more sensor connections, more functionality and more flexibility with a colour screen and optional built in 3G modem. The CRIUS® is an attractively priced, top of the range instrument controller. Optional communications packages allow Profibus, Modbus ASCII, Modbus RTU, Modbus TCP and others.

The CRIUS® is equipped with the capability to connect up to four sensors of any type with appropriate analogue outputs and relays. Four sensors not enough? Simply connect up to 4 CRIUS® together all using the same display and communications. Equipped with data-logging as standard and multiple PID loops as options, the CRIUS® is very able to control complex water treatment processes at a fraction of the cost of other controllers.

With all users having their own log on, and with three levels of instrument and remote access security, you can use the CRIUS® with all of its superior functionality with confidence.

A CRIUS® plus Sensor equals…

  • Free Chlorine Analyser (HaloSense)
  • Total Chlorine Monitor (HaloSense)
  • Chlorine Dioxide Analyser (DioSense)
  • Ozone Monitor (OzoSense)
  • Dissolved Oxygen Meter (OxySense)
  • Suspended Solids Monitor (SoliSense®)
  • Turbidity Meter (SoliSense®)
  • Streaming Current Monitor (StreamerSense)
  • pH Analyser (pHSense)
  • ORP Analyser (ORPSense)
  • Organics Monitor (UV254Sense)
  • Biofilm Monitor (BioSense)
  • Online Conductivity Monitor (ConductiSense)
  • Particle Counter (CounterSense)
  • Filter Monitor (FilterSense)
  • Coagulation Controller (CoagSense)
  • External inputs
  • Choose from Standard Configurations or ‘Build Your Own’

For each sensor the CRIUS® will prompt users through calibration procedures and will remind them when maintenance is due for each sensor type.

The CRIUS® is currently used in a multitude of applications including: Water Treatment for the control of, for example, Cooling Towers where the online biofilm control of the BioSense and the remote access capability is bringing solutions to our customers’ water treatment requirements.

The CRIUS® is preferred in the Swimming Pools market, where the superior control and sensor capability provides for better quality bathing water. Again the remote access is proving essential to our customers along with the Variable Speed Drive (VSD) control which is massively reducing electricity usage and CO2 emissions (and reduces the electric bills!).

In the municipal drinking water market, the superior control capability is making it the controller of choice for areas like coagulation control with the superior sensors in use particularly for chlorine control and dissolved oxygen control.

Summary of Applications

  • Water Treatment
  • Drinking Water
  • Waste Water
  • Pool and Spa Control
  • Industrial Water
  • Food and Drink
  • Paper and Pulp

The CRIUS® can also come in a multitude of languages making it suitable for use in any market.

Customers requiring a no-frills controller should consider the CRONOS® controller.

Document Type Size
CRIUS® Brochure 1MB
CRONOS® Brochure 1MB
CRIUS® Remote Communications Brochure 3MB
CRONOS® and CRIUS® Control Options Technical Note 1MB
How To Specify a Pi Analyser Technical Note 1MB
Remote Access GPRS Technical Note 190kB
PID Control Technical Note 1MB

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.

If you have used a Pi controller you will know that they give you unrivalled control options but did you know that Pi’s new controllers also offer individual security for up to 20 named individuals?

Pi’s controllers have always given flexibility but did you know that Pi’s new controllers can accommodate up to 16 sensors of any description?

CRONOS Controller

This Focus On describes the 10 most popular innovations to be found in Pi’s new CRONOS® and CRIUS®.

No. 1 – Human readable service log

Both the CRONOS® and CRIUS® analyser/controller has a downloadable human readable service log – giving an entire history of the instrument including current settings, calibrations etc. Provides a great snapshot of how an engineer left an instrument.

No. 2 – Cloning facility

Ever had to set up many instruments with the same settings? Simply set up one and copy it to others!

Connections ExampleNo. 3 – On screen wiring diagrams

Lost the manual or can’t be bothered to find it? Pi’s analysers have the answer!

No. 4 – Want a bit more info on what’s going on with a sensor?

Pi’s new sensor maintenance pages are just for you then! Detailed information about all aspects of the signal coming off the sensor clearly available.

DatalogNo. 5 – Instrument datalogs not quite giving you what you need?

Pi’s new look datalogs in CRONOS® and CRIUS® (downloadable) let you datalog almost everything, put graphs on the display, datalog the same parameters at more than one interval and a whole lot more. Never has instrument datalogging been so easy and complete.

No. 6 – New enclosure

The new enclosure brings a new level of flexibility being wall mountable, pole and handrail mountable and even flush mountable. Not only that, but it gives you loads of room to work in and there are even spare live, neutral and earth terminals to make wiring relays easier!

No. 7 – Not enough I/O?

Don’t worry, simply daisy chain 4 CRIUS® together and you can use the same display, comms options etc. and increase your I/O fourfold to give up to 16 sensors.

No. 8 – Bored of reading about stuff in manuals that you don’t have?

Pi’s new manuals are bespoke to each instrument. The manual is ‘built’ to match each individual instrument so the manual only has what you have!

CRIUS Controller

No. 9 – Has the operator been messing with settings they shouldn’t?

No more! With 20 individual user settable logons, you can give people access to what they need and no more.

No. 10 – Control algorithms

Pi has developed a reputation for developing great control algorithms and this has continued with the new CRONOS® and CRIUS® with the introduction of feed forward control algorithms and a master controller which selects the correct control philosophy to use (for use with complex systems such as coagulation control).

Contact us on...

Tel: +44 (0)7966 931 928

Email: [email protected]

"Get in touch, I'd be
happy to help."

Alan Burns

Head Office Contact

Tel: +44 (0)7854 133327

Email: [email protected]

"Give me a ring, I'd love
to hear from you."

Rob Paramore

North/West England, Wales, N. Ireland

Tel: +44 (0)7779 993848

Email: [email protected]

"Give me a ring, I'd love
to hear from you."

Bill Sykes

Scotland, Isle of Man