for Aquaculture Recirculating Systems, the new Enviro-Monitron
is a full-feature multi-task monitoring and control
Experienced aquaculturists and supporters of the
KISS principle (keep it simple) , the Enviro-Monitron’s designers
wanted a system that biologists, researchers, and
technicians alike could easily adjust to their own
needs without previous programming training. Designed
to hold up well under the harsh conditions of most
aquaculture applications, this system can grow to
handle complex and numerous tasks, while remaining
extremely simple to use.
It integrates data monitoring (8 analog inputs, 8 digital inputs and 2 high-speed digital inputs), process control (6 cyclic or proportional outputs, 2 analog 4-20 mA, and 2 on/off outputs), display, alarming, and the capacity to transfer data to a central computer via a radio link.
• Possibility to continuous monitoring
of Dissolved Oxygen (DO), Temperature, pH, Salinity,
Conductivity, Oxidation Reduction Potential (ORP),
Other equipment (e.g. flowmeters, level
sensors) can be integrated
• Each probe is easily calibrated by one or
• Auxiliary I/O supporting 18 Inputs (8 Digitals,
8 Analogs and 2 Pulses). Inputs can monitor parameters
such as pump, chillers and heater’s status,
• Handy for maintaining control over water use,
the Enviro-Monitron can monitor and control the level
of water exchange in a system. Water inlet can be
adjusted as either the % tank volume per day or as
% of total flow
• Every unit is built to client’s specification.
Most popular configurations include DO, pH, % recirc,
and temperature control
• 8 Power Switches (International Rectifier)
output (5 Amp. 24 Volts DC each).
• Menu-driven programming environment.
• FLASH memory for stocking data (49 152 data
for 25 days).
• Battery back-up for monitoring.
• Multi instrument networking capability (up
to 50 apparatus) via a Radio-link or a RS485 cable.
• Housed into a 100% polycarbonate non-corrosive
NEMO 4-X box (humidity and splash resistant enclosure).
Data transmitted by radio frequency can travel through
walls and floors, and on long distance depending on
the environment. For example, 900 MHz signals will
travel between 250 m when travelling across 5 concrete
walls, and up to 6 km in open air. This span can be
increased considerably with the use of an RF repeater.
Monitoring functions have been standardized. Every
1/10 second the Enviro-Monitron reads each input and
after 100 reading, the apparatus computes, monitors
and displays a mean of these readings. Each 5 minutes,
this data can be transferred to a central computer
that integrates records from up to 50 individual Enviro-Monitrons.
Dissolved oxygen measurements are computed in both
mg/L and % saturation; temperature in oC or oF, salinity
in PSU and flow in L/min. or US Gal/min.
Enviro-Monitron’s advanced control functions
include PID (proportional derivative integral control),
cyclic PID (voltage variable) and on/off regulation.
These sophisticated features integrate the advantage
of great precision and stability in maintaining DO,
temperature, % of recirculation, salinity, etc., at
a given value. This is done with extreme ease: the
operator simply enters the set points for a given
parameter; a smooth and precise response is then automatically
set in motion. Further, an unique auto tuning function
allows to rapidly and precisely calibrate the PID
and cyclic PID controls.
The alarm system provides visual notification (blinking
screen) when data exceeds the programmed deviation
(set in %). Each input triggers its own alarm. Used
in conjunction with a standard telephonic modem, the
Monitron generates remote alarm notification via a
digital pager. Used in conjunction with the central
computer running the Enviro-Monitron software, it
provides more elaborate Email alarm notification directly
on digital pager (service offered by most telephone
Our monitrons are currently operating in
aquatic laboratories and live lobster facilities in Canada and Europe.