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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

The 7300w² contains an inbuilt trending display, customer configurable, that shows the last 24 hours data for any measurement point on an easy to navigate graph. This can also be downloaded for reporting purposes. An external USB port and data logging function allows users to log and retrieve all stored data for a site in a standard .csv format without the need for specialist SD cards or compatible hardware.

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.

Dimensions (hxwxd)185 x 213 x 95 mm
Weight1.4 kg
Protection ClassIP65
Enclosure MaterialPolycarbonate (PC)
Cable Entries1x M20, 4x M16, 1 x USB Type A
Environmental Data
Operating Temperature-20 to +70ºC, 0-95% Humidity (Non-Condensing)
Power Supply100 to 240 VAC 50/60 Hz
Power RatingAC Supply - 0.8 A
DC Supply - 30 W
User Interface
DisplaySunlight Readable Black on White Graphic LCD
Back LightOn/Off/On after Keypress with user adjustable contract
Keypad6 Key
Trending Display24 hour trend display - user configurable
DataloggingUSB port for user memory stick
10,000 records limit
User configurable intervals 1-999 seconds
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 (85 to 264 VAC, 2 x 0/4-20mA Output, 3 x Relay Outputs)
2231617300w² Monitor (9 to 36 VDC, 2 x 0/4-20mA Output, 3 x Relay Outputs)
2269747300w² Monitor (85 to 264 VAC, Modbus Slave, 1 Relay Output)
2269757300w² (9 to 36 VDC, Modbus Slave, 1 Relay output)
Mounting Options
223974FlexTech Monitor Bracket (7300w²/SludgeWatch Ultra Monitor, Ø 43 to 60.3mm)

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