ColorPlus 2 (HAZEN and DOC Measurement in Raw Water)

How the ColorPlus will provide reliable data in 3 effective steps

1. Contamination Compensation: The ColorPlus is an absorption instrument which is in contact with the sample water. Like all alternative products, the optics will eventually become contaminated when they are in contact with water. However, it’s at this point that the Sigrist philosophy of minimal maintenance with no tools gives you a clear benefit.

Inside the measuring cell is a small piece of glass made from the same material as the windows. This is called the Compensation Glass. The light source is split into 2 beams. One beam goes through the transmitter window, the water sample and the receiver window. The second beam goes through the transmitter window, the water sample, both faces of the compensation glass, and the receiver window (ie twice the contamination). The ColorPlus now compensates for contamination until no more correction can be made internally and a Clean Alarm is generated.

2. Turbidity Compensation: The ColorPlus uses narrow bandwidth light sources to monitor concentration by using the Beer-Lambert principle of absorption as an indicator of concentration. However, this concept has an Achilles heel. It affects everybody, and It is turbidity. Turbidity will absorb the light intensity unless it is taken out of the equation. This is where the 3^rd light source at 700nm is used to solely monitor absorption outside the visible spectrum and then used to compensate the colour and UV 254 values. This feature will give you True Colour readings.
3. Simple, Fast, Accurate Calibration. With up to 3 different values to calibrate, the ColorPlus completes in minutes what would take other instruments hours to check. By using the tried and proven optical calibration elements from a major aerospace company, the Calibration process couldn’t be easier. No chemicals. No mixing. No cost.

Additionally, the Sigrist ColorPlus provides easy integration into your control system. We offer a range of output signals for efficient communication with your equipment.

• Up to four 4-20 mA outputs, Digital inputs and outputs
• Ethernet, Modbus TCP
• Optional: Profibus DP, Modbus RTU. HART