Krucial Connected Seafarm sensors

There are a range of Connected Seafarm sensors available that use the Krucial K-Mote. Installation of these sensors is detailed in this page. These include:

Sensor Model	Function	Measurements
Aanderaa 4531D	Dissolved Oxygen Sensor	Dissolved Oxygen (mg/L), Temperature (°C), Air Saturation (%)
Aanderaa 5819	Conductivity Sensor	Conductivity (mS/cm), Temperature (°C), Salinity (psu), Sound Speed (m/s), Water Density (kg/m3)
Chelsea Technology Trilux	Chlorophyll Sensor	Chlorophyll (ug/L), Turbidity (FNU), Phycoerthrin (ug/L), Temperature (°C), Vin (V), Vref (V)

Pen installation

You will need:

• Rope
• Buoy
• 1-5kg Weight (if using Aanderaa 4531D sensor)
• 1x M8-M10 D Shackle (for the above weight)
• Cable ties
• Electrical tape
• Sensor from the list above with Krucial K-Mote connector
• Krucial K-Mote (including power cable/supply and antenna, see K-Mote for installation)

Preparation

Prepare the equipment on dry land prior to going out to the site

1. Thread the rope through the buoy so that there is plenty of length on both ends to reach each side of the pen.
2. Tie one side around the other, thread the rope through the buoy again, and tie it aroud the loop again. You should now have the buoy tied in the middle of the rope with a loop around the buoy.
3. Thread the connector end of the sensor cable through the loop around the buoy, and pull the cable through to the required length. This cable length between the buoy and the sensor will be the sensor depth in the water.
4. Tape the cable to the rope at 0.5m intervals on one side of the buoy. This will be the distance of the sensor from the edge of the pen, but can be adjusted at installation.
5. Use the shackle to connect the weight to the hole on the bottom of the sensor (if using Aanderaa 4531D sensor).
6. Coil up cables/ropes and put in a box to transport to deployment site.

The Krucial K-Mote should be installed on the pen before the sensor is installed.

Installing sensor on pen

1. Take the end of rope with the sensor cable taped to it and tie it to the pen close to the KMote. Note - leave at least 1m extra slack cable between the rope tie-off and K-Mote for strain relief.
2. Walk the other end of the rope around to the opposite side of the pen so that the buoy is held in the middle of the pen with eh sensor hanging below it. Tie-off the rope to the pen. – Note - leave enough slack in the rope so it can flex with the movement of the pen in sea conditions.

1. Secure the sensor cable to the pen by wrapping electrical tape around, as shown.

Note - The extra 1m slack for strain relief should be looped and taped loosely between pen and K-Mote, as shown

Barge installation

You will need:

• 1-5kg Weight (if using Aanderaa 4531D sensor)
• 1x M8-M10 D Shackle (for the above weight)
• Cable ties,
• Electrical tape
• Sensor from the list above with Krucial K-Mote connector
• Krucial K-Mote (including power cable/supply and antenna, see K-Mote for installation)

Installing sensor on barge

• Install in a location away from risks of damage to the sensor cable, i.e. away from boat moorings, such as where feed pipes enter the water.
• Mark the desired sensor depth on the cable before lowering into the water.
• Once lowered, secure the cable to the barge using cable ties and electrical tape.
• Run the remaining cable to the K-Mote installation location, securing the cable out of harms way with cable ties.

Connecting sensor to K-Mote

1. Connect the sensor to the K-Mote, and twist locking ring to the right so that it locks in place. The padlock symbol will be in-line with white line when the connector is locked. Do not force connector together. If there is resistance, ensure locating tab on both sides of connector are correctly orientated.
2. Tape sensor cable to KMote mounting pole – secure with cable tie as shown below. Secure cable with slack between tape and K-Mote as highlighted in Step 2 image below.
3. Tape off sensor cable loop to keep walkway clear and prevent snagging of cable. Cut off cable tie tails once secure.