8
Sensor Maintenance and Precaution
The ST-500 Series sensor is designed to provide reliable and continuous PTSA readings even when installed
in moderately contaminated industrial cooling waters. Although the optics are compensated for the effects
of moderate fouling, heavy fouling will prevent the light from reaching the sensor, resulting in low readings
and the potential for product overfeed if the ST-500 Series sensor is used as part of an automated control
system. When used to control product dosing, it is suggested that the automation system be configured
to provide backup to limit potential product overfeed, for example by limiting pump size or duration, or by
alarming if the pumping rate exceeds a desired maximum limit.
The ST-500 Series sensor is designed to be easily removed, inspected, and cleaned if required. It is sug-
gested that the ST-500 Series sensor be checked for fouling and cleaned/calibrated on a monthly basis.
Heavily contaminated waters may require more frequent cleanings. Cleaner water sources with less con-
tamination may not require cleaning for several months.
The need to clean the ST-500 Series sensor can be determined by the
Cleanliness Check
using either the
uP-
yxis®
Mobile App (see the
section) or the
uPyxis®
Desktop App (see the
section).
8.1
Methods to Cleaning the ST-500 Series Sensor
Any equipment in contact with industrial cooling systems is subject to many potential foulants and contam-
inants. Our inline sensor cleaning solutions below have been shown to remove most common foulants and
contaminants. A small, soft bristle brush, Q-Tips cotton swab, or soft cloth may be used to safely clean the
sensor housing and the quartz optical sensor channel. These components and more come with a Pyxis Lab
Inline Probe Cleaning Solution Kit
(P/N: SER-01) which can be purchased at our online E-Store
lab.com/product/st-series-probe-cleaning-kit/
Figure 17.
Inline Probe Cleaning Solution Kit
ST-500 Series User Manual
| +1 (866) 203-8397
16
