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7300w² Monitor

Monitor for the WaterWatch² Range

The 7300w² Monitor is the core product in the WaterWatch² range. The monitor is designed to interface with all of the sensors in the WaterWatch² range. The monitor specification provides all the connections required for 1 or 2 sensors, systems can be created by the use of expansion boxes to include multiple sensors. The maximum number of sensors will be limited by the practicalities of most sites. We anticipate 8 being a sensible maximum although many more can be accommodated.

For specialist advice call:

+44 (0)1726 879800

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  • Overview
  • General Specifications
  • Input/Output Specifications
  • Expansion Options
  • Ordering Information

Combining sensors provides a very cost effective way of simultaneously monitoring parameters such as dissolved oxygen and suspended solids in an activated sludge plant, or pH and turbidity at a treatment works outfall where the sensors can be located close together.

Monitoring of these key parameters requires sensors that are reliable and accurate, the TurbiTechw² LS meets this requirement perfectly.

The large optical surfaces and sample volume ensure that the information provided by the sensor is both representative of the process and tolerant of fouling. In addition the sensor incorporates a self cleaning mechanism that ensures the optical surfaces are kept clean at all times, the cleaning system is designed to avoid problems with ragging and does not smear the optical system.

The cleaning system ensures that manual intervention on a routine basis is not required, the sensor should simply be checked as part of general site housekeeping.

The TurbiTechw² LS Sensor employs infrared light at 860 nm using the 90º Light Scatter principle in accordance with ISO7027 (2000). The cleaning process is automatically initiated by the 7300w² Monitor at a user determined frequency.

The cleaning process takes only 90 seconds, which means that the sensor is available for 99.5% of the time with a 5 hourly cleaning cycle.

Dimensions (hxwxd)185 x 215 x 95 mm
Weight1.4 kg
Protection ClassIP65
Enclosure MaterialABS
Cable Entry1x M20, 4x M16, 1x M12
Cable Core SizeMax Conductor Size 2.5 mm²
Power Supply100 to 240 VAC 50/60 Hz
Power Rating30 W
If more than two TurbiTechw² Sensors are to be used than an external higher rated power may be necessary
Environmental Data
Operating/Storage Temperature-20 to 60ºC, 0-95% Relative Humidity, Non-Condensing
User Interface
DisplayGraphical LCD, Black on White, Transreflective
Viewing Area78 x 59 mm
Back LightOn/Off/On after Keypress with user adjustable contract
Membrane Keypad6 Key, pillow embossed, 20 mm diameter
Sensor2x ModTechw², RS485
AuxilliaryAdditional input for ancilliary devices such as sample presence detectors. This connection can also be used for powering such devices
Serial CommunicationsModbus RTU on RS485
Profibus DP via Interface Unit
Analogue2x 4-20 mA, maximum load 750 ohm
Relay TypeSPCO
Relay RatingMax 2A @ 30VDC/230VAC
Auxiliary ConnectionsConfigurable for Remote Input, Device Power
Part NumberDescription
224939WaterWatch² Expansion Box (3-4 Sensor Input, 4x 0/4-20mA Output, 4x Relay Outputs) (Cable Length: 2 metres)
225036WaterWatch² Power Supply (Input: 100-240VAC, Output: 12VDC, 5A)
Part NumberDescription
2231607300w² Monitor (100 to 240 VAC, 2x 0/4-20mA Output, 3x Relay Outputs)
2231617300w² Monitor (9 to 30 VAC, 2x 0/4-20mA Output, 3x Relay Outputs)
Mounting Options
223974FlexTech Monitor Bracket (7300w²/SludgeWatch Ultra Monitor, Ø 43 to 60.3mm)

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To speak with one of our specialist advisors, call +44 (0)1726 879800
or complete our Online Enquiry