Water & Wastewater Asia September/October 2022

ON OUR RADAR
REAL-TIME CHLORINE
MEASUREMENTS
in drinking water
LACROIX’s latest sensors can facilitate strict monitoring
of chlorine levels in drinking water, putting utilities at a
peace of mind.
Controlling the level of chlorine in water
networks is crucial to guaranteeing the quality
of drinking water. Monitoring active chlorine
levels in drinking water distribution networks
is becoming more important across the world,
while regulations in some countries have
made it imperative that water suppliers can
constantly monitor these levels.
To solve the challenge of active chlorine
level monitoring, LACROIX has developed
the ChlorIN sensor. When connected to a
SOFREL data logger, it collects chlorine
levels at regular intervals. This continuous
monitoring means that an alert can be sent to
the operators and the centralisation software
should the chlorine level exceed or fall below
thresholds set in the software.
This brings numerous savings to the operator,
from less travel time and working on-site, to
supplying more extensive data. The sensor
can be installed anywhere on the water
network, and it can be used to monitor critical,
strategic, or interconnection points, as well
as at the end of the network. The internal
battery has a service life of up to 10 years.
A version with an external power supply is
also available, allowing the data logger to
be powered for even longer via an external
source, be it a battery, mains power or a solar
panel.
The sensor can be installed to existing
water pipes, without interrupting the flow of
water. The attached sampling valve allows
for immediate sensor calibration. Data is
transmitted via 2G/4G networks, via an
integrated high-capacity antenna. The
ChlorIN sensor is also available with an
additional CPR pressure sensor for service
quality measurements.
SOFREL DL4W OPENSENSOR DATA
LOGGERS FOR MORE SENSOR
OPTIONS
The new range of SOFREL DL4W data
loggers allows the connection of up to
eight sensors, thanks to an open Modbus
connection.
The open Modbus model allows the data
loggers to meet the monitoring needs
of both drinking water and wastewater
networks. The high power model is preequipped
with a connector allowing the
connection of an ultrasonic level probe
and is usually used for self-monitoring
and permanent diagnostic needs. The
RS-485 serial input is compatible with all
Modbus RTU equipment.
Two additional DIs make it possible to
also measure pulses, for example, to
signal the opening of the manhole cover,
or to monitor an overflow sensor or rain
gauge.
The ChlorIN sensor from LACROIX installed
retroactively on a water pipe
The ChlorIN sensor is equipped with a sampling valve
for sensor calibration
Like all of the SOFREL data loggers, the
DL4W also comes with an enhanced
IP68 waterproof rating, an integrated
2G/4G M2M antenna, and a three-year
manufacturer’s guarantee.
54 WATER & WASTEWATER ASIA | SEPTEBMER/OCTOBER 2022