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Tritech 720im multibeam Sonar

So here’s my next project, I’ll be integrating the Gemini 720im onto the bluerov2.

Details to follow along with possible videos.


Exciting form factor…

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Excellent! I think you’ll be impressed with the performance. I have had really good luck with the Gemini 720ik; it’s about double the price but well worth it. Do you have a plan for comms and power?

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I’m pretty licky having access to all of the tritech range.The 720ik is the next step, I absolutely love the image quality i get on the ik but at the moment we are working some developements with the 720im so thought it would be a good oportuniuty to integrate it with te Bluerov2.

For power im looking at this DC-DC converter https://uk.rs-online.com/web/p/isolated-dc-dc-converters/8431733/

The 720 im works over serial RS485 and the 720ik is VDSL, so running them shouldnt be an issue.

I’m interested to see if we get any issues from thruster noise and also how much drain on battery life running the sonars will be and how it affects running time.

I’ll be carrying out testing with our micro Nav system USBL system as well.


Nice power supply! We use a slightly different brand on our mux board, but it’s effectively the same.

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Chris, hope you’re doing well! It’s been a while. Below are a couple links to forum postings we put up that you may already be aware of, but I figured it may be worth sharing again.

Regarding thruster noise, we have not seen any on our systems so far with the Gemini 720ik…

1.) BlueLink Multiplexer - DEPS MUX (Dual Ethernet Plus Serial). This MUX also has clean 12VDC & 24VDC DC-DC convertors built right onto the board. Everything you need to add a 720ik to the BlueROV2.

2.) Our surface powered SAR BlueROV2 system which has a Gemini 720ik mounted on it without adding a skid or changing the overall size of the ROV.

You have my email addy, shoot over an email if you have questions.

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I had a meeting with Mike Broadbent a few months ago. He kindly gave me a lot of his time going through the Tritech range. At that time I thought the 720im was going to be the best choice; especially here in the U.K. because water vis. is notoriously bad.

Looking forward to hearing how you get on. Saving hard, a few more jobs and I’ll have one :grin:

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Hi Terry, yes Mike is a really good guy. I’m going to start with the 720im and the 720ik and hopefully get the microNav USBL system on it for position hold and automation. Having used Pixhawk and ardupilot for my flying systems I know there is a auto survey capability on it so would be good to try and implement it

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Hi Chris, I was about to integrate reach RTK into my agricultural fixed wing drone when I discovered ROV’s, so I am familiar with mission planner / pixhawk. If you need any help, please feel free to ask.
Off to Cornwall in a few weeks as I have permission to video U1021. USBL would be useful.


Hi Terry,
sorry for the lack of response, I set up a email folder and didnt see the message notification till now.
Frustratingly, Istill havent progressed with this since installing the whips for the Micron and the Gemini 720ik sonars. somehow i have been busy and not be able to get back on this.

I’ll give you a shout when i can.