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Wellmon 550 User Manual

Wellmon 550 user manual


The Polar Monitoring Wellmon 550 is a remote monitoring telemetry device for water wells & boreholes.

It was designed to give owners more information about their borehole. It monitors the ground water level inside of the well as well as if the pump is running.

The 550 controllers come with the ability to turn the pump on and off remotely via the web portal.

Remote Monitoring

The heart of the Wellmon range is the ability to be able to remotely monitor & control your site using the Polar Monitoring online portal.

Polar Monitoring provides the following facilities on its web-based portal:

  • Visualizations of collected data
  • Logging & history of data points
  • SMS & Email Alerts
  • Reports & CSV Downloads
  • Control of devices

The Polar Monitoring portal is located at: https://portal.polarmonitoring.com



You will need a valid user account in order to make use of the online portal.

Ask your subscription administrator to create an account for you. Or if you are the subscription admin you can add additional users via the “Users” Tab.

You are able to add unlimited number of users to access the device.

Wellmon 550 Installation

Physical Installation

Mount the unit at a convenient place close to the pump’s controller box & the well. The unit is IP66 water & dust resistant, so it can be mounted outdoors.

Keep in mind that the unit uses GSM connectivity, so it should not be mounted close to any large transformers or electrical machinery as this could affect the GSM signal.

Make sure that the unit is mounted vertically, with the cable glands positioned at the bottom.

Electrical Installation

  • Remove the four screws on the front of the unit and remove the front cover
  • The wiring connections are all done on the din rail mounted terminals on the inside of the enclosure.


The electrical connections are shown below:

Group Name




Wire Colour

Power In

230V AC










Pump sense

230V AC (IN)







Pump Relay Control

N/O Relay Connection


N/0 Com





Sensor 1

4-20mA 2 wire (12V DC)





Negative (-)



Positive (+)



Image of terminals:

There are 4 steps to correctly wiring the unit:

  1. Connecting AC power to the unit
  2. Connecting the pump / contactor
  3. Connecting the pump run sense
  4. Connecting the sensor probe

1.     Connecting AC power to the unit

This step involves connecting power to the Wellmon unit. This will be used to power the telemetry as well as the pump control circuitry.

NB: Please note that Wellmon 550 controller operates on single phase 230V AC power.

Connect terminal 1, 2, and 3 up to the corresponding mains power source.

If you are taking power from a 3 phase supply, you only need to connect neutral and one of the phases.

2.     Connecting the Pump

In order to be able to remotely control the pump from the web portal, one needs to connect the pump control circuitry. The Wellmon 550 controller has a dedicated output for controlling the pump.
Please see details below.

There are two available methods that can be used to control the pump:

  1. N/O (Normally Open) Relay Control:
    1. This option is ideal if the pumps starter / controller has a built in low power relay control input. This would act as pressing a start / stop button or float switch.
    2. Using an external contactor to break power supply to pump.

Detailed instructions for each option to be found below:

1:  N/O Relay Control

Please check that the pump’s controller supports a Normally Open (N/O) input switch.

  • Step 1: Identify the location of the connections on the pump controller
  • Step 2: Run a suitable 2 core cable from the pump controller to the Wellmon 550 controller
  • Step 3: Connect the cables to Terminals 6 & 7 on the Wellmon controller
  • Step 4: Connect the other end of the cables to the pump controllers terminals

When the pump is set to OFF, the Wellmon will break the connection between terminal 6 & 7. When the pump is set to ON there will be a connection between terminal 6 & 7.

Please note that this relay control is designed for control logic only, and is not designed to switch high power loads.

Single Phase 230V Installations

Three phase 400V Installations

Connecting the sensor probe

Installing the sensor into the well

It is best practice to install the sensor probe inside a piezometer tube. We recommend using a 32mm HPDE plastic tubing. This protects the sensor & its cable from the pump. In larger installations the pump can create a vortex of water inside the well, causing the sensor probe to move around. This could cause the pump to get jammed into the well and prevent it from being lifted to the surface.

Steps to install the piezometer tube:
  • Measure out the correct length of pipe, it should sit roughly 1m above the pump and go the entire way to the top of the well
  • Plug the bottom end of the pipe to ensure that the sensor does not fall out
  • Cut small slots / notches into the pipe every few meters or so using a hacksaw. Ensure that the bottom last meter has more slots to allow water to easily escape
  • Place the pipe into the well ensuring that it is tightly secured at the top of the well.
    • Alternatively if you are doing a new installation or pulling up the pump, it is best to secure the piezometer tube to the rising main.
  • Once the piezometer tube has been successful installed, simply slide the sensor into the tube and lower it all the way to the bottom.

Secure the sensor cable tightly at the top of the well so that the sensors height does not change. Ensure that the weight of the sensor will not cause the cable to cut or fray against the wall of the well.

Connecting the sensor to the controller

Bring the sensor cable through the right most cable gland at the bottom of the Wellmon 550 controller.

Connect the 3 wires in the correct order to terminals 8, 9 & 10.






Power Input Voltage

230V AC

Power usage

50W Max


300mm (Width)

400mm (Height)

100mm (Depth)

Weight – PVC Enclosure

3 Kg

Weight – Steel Enclosure

6 Kg

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