Instrument Controllers

Pi doesn’t believe in asking you to choose between many different instrument controllers but instead we have a scalable solution for both the simpler and the more complex measurement and control applications. The CRONOS® is a less capable version of the CRIUS®4.0 with less I/O and communications options. Contact us and we can help you to decide what you need for your application.


The CRONOS® is capable of controlling up to two sensors of any type with appropriate analogue outputs and relays. Equipped with optional PID control, the CRONOS® is highly proficient at controlling complex water treatment processes, all at a much better cost compared to other controllers in the industry.


The CRIUS®4.0 can connect up to four sensors of any type with relevant analogue outputs and relays. Four sensors not enough? Simply connect up to 4 CRIUS®4.0 together (see below), all using the same display and communications. Equipped with data-logging by default and multiple PID loops as options, the CRIUS®4.0 is quite capable of controlling complex water treatment processes at great value in relation to other similar controllers on the market.

Multi-Parameter Analyzers – CRONOS® and CRIUS®4.0

Multi-sensor, multi-channel, multi-parameter analyzers can significantly reduce the cost per point of any measure including pH, residual chlorine, ORP, ozone, chlorine dioxide, dissolved oxygen and turbidity measurements, all without sacrificing the quality of those measurements.

Remote Access

The Process Instruments CRIUS®4.0 controller can provide remote access via LAN or GPRS modem. Have a look at our video to get a flavor of what Control InSite can do for you. In this COVID world, remote working has become more important and with the CRIUS®4.0, the first in the world to utilize the IoT protocol MQTT, you can be confident that you have the best and most complete remote access solution anywhere in the world.

Need help deciding what you need? Fill in the form and we will call you.

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