Aquariums recycle the tank water and only occasionally add new water to the system. The recycled water is typically ozonated to clean out bacterial waste and sent through a sand filter to remove other wastes in the water. ORP is usually used to measure ozone levels in the water. The flow in the system is measured at various points in the loop. A paddlewheel may function properly in this type of application. However, bacterial growth may build up on the rotor and frequent cleaning may be required. Also, some solids may flow pass the sensor and clog the rotor. A magmeter flow sensor is a good alternative that requires less cleaning and maintenance. The temperature of most aquariums is monitored to insure the water environment is tolerable to the species in the tank. Other measurements such as pressure and level may also be monitored.
Measurements in closed system aquariums:
Flow:
Monitor water turn-over through the filter system
Monitor the amount of discharge water
ORP: Monitor disinfectant levels in the recycled water
Pressure: Monitor the media filter tank pressure which is a good indicator of when a back-wash procedure should be performed
Temperature: Monitor and maintain proper temperature, critical to many species of sea life
Level using a pressure sensor : Monitor hydrostatic level as an accurate alternative to mechanical level switches.
Signet Product Line - Features & Benefits
Flow
515, 2536
• High quality, low cost
paddlewheel for reliable
measurement
• Compatible materials for
fresh and sea water
• Easy installation into
½ to 36 inch pipes
2551
• Insertion style magmeter
for easy installation in up
to 8 in. pipes (Available
for 10" & 12" pipes upon
request)
• Accurate measurement
even in dirty liquids
• 4 to 20mA output available
for direct input to PLCs
or chart recorders
ORP
2715, 2717, 2755,
2757, 2775, 2777
• Reliable ORP measurement
• Twist-Lock or DryLoc™
connector for easy
installation
• Various mounting designs,
including wet-tap, for
quick & simple calibration
& maintenance
