Application: COW Water

Whether you’re going to re-purpose COW water or simply send it to waste, solids carry-over can create challenges. Quadbeam’s multi-beam suspended solids sensors can help in both scenarios.  

As well as highlighting process issues around the evaporator, monitoring suspended solids can also protect filtration systems from being overburdened with excess solids when COW water is going to re-purposed applications. Or if COW water is going directly to waste, monitoring solids can ensure that what’s released stays within the required limits.

How to use the Quadbeam sensor


Install the sensor directly into COW water line using a 3-inch tri-clamp fitting.


Connect the sensor to the MXD73 or MXD75 transmitter and simply calibrate against the solids to be measured.


The transmitter provides a 4-20mA output for each sensor for connection into the plant control system.


Alarms can be set on transmitter relays or within the plant system to detect suspended solids in the COW water.

A sensor to suit you

The range of Quadbeam sensors suits different applications, conditions, concentrations, and products.

For COW water, the T30-3HY is often used.

(the measuring range will vary according to media and particle characteristics)

Find the right sensor

Why you can rely on Quadbeam sensors

The range of Quadbeam sensors suits different applications, conditions, concentrations, and products. The most commonly used sensors for loss monitoring are the S20 and S40, in either the tri-clamp (hygienic) or immersion styles.

Listening to nature’s voice


Quadbeam sensors are incredibly accurate because they’re multi-beam, so they can eliminate measurement error that single-beam sensors can’t cope with. Two LEDs fire near-infrared (NIR) light at two detectors to generate multiple light intensity measurements that represent the suspended solids concentration. These measurements are combined into a ratio-metric algorithm that self-compensates for common sources of measurement error like contamination or component ageing.

Listening to nature’s voice

One-piece body

Quadbeam sensors are also tough because they’re made from a one-piece polymer body, with no glass lenses that could leak or break.

Listening to nature’s voice

Simple to use

Quadbeam sensors are simple to calibrate on-site, so they give results that are directly relevant and meaningful to the site. There are easy calibration instructions here, or contact us for assistance. They’re also easy to use. They produce a 4-20 mA output for transmitters, and can be used with Quadbeam’s MXD73 or MXD75 multi-channel transmitter.

Listening to nature’s voice


Quadbeam’s T30 sensor has a T90 of 8 seconds, which tends to be faster than many other COW water monitoring solutions.

Find out more


Monitoring COW water with a Quadbeam sensor offers multiple advantages and savings:

1. Control of evaporation or concentration:
A sensor will detect any milk solids in the COW water as a result of process issues. This offers an opportunity to identify process improvements.

2. Protecting filtration systems:
When COW water is re-used, monitoring and controlling suspended solids provides a level of safety preventing filtration / RO systems from becoming blocked by excess solids.

3. Checking COW water is clean before discharge:
Contaminated COW water may exceed compliance requirements.  A sensor inline can identify this so you can take action.

For help or to find out more

If you want to discuss your installation or have another question, or just want to find out more, contact us. You can also see our full product range here, and access data sheets, manuals, and technical information.

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