Public Discussion Forum

The one Don came up with looks like it would do the trick, especially if it's not a solid piece all the way inside the threads. Can't tell. If I had to do it again I'd get both and try it out.

Here's what I found:

https://www.amazon.com/dp/B073WLH4CD?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

If the link doesn't work: CHARLOTTE PIPE 3 DWV Flush CLEANOUT Plug DWV (Drain, Waste and Vent) (1 Unit Piece)

The threads were definitely correct but I will say a the fit was a bit sloppy but a few wraps of teflon tape seemed to do the trick.

The TW4 docs said it was 3" FPT so that's what I was looking for. Typical one has a big square nut on top so naturally I was looking for a flush mount option.

This fits:

https://www.amazon.com/dp/B008FMMJIQ?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_11

Hey David, where did you get the blank pvc plug? I'm away on vacation, but my new sensors are at home awaiting my return!

Steve

Kallisto 5369

Happy to report that Safiery sensor on a PVC plug where the TW4 dipsticks were is reading nicely. Seems very accurate, registering every flush.

Thanks everyone for the tips and feedback.

Hi, David. It took a lot of trial and error to get mine dialed in, but it has been pretty stable for the last few weeks while we've been cruising. It's definitely more accurate when there is little movement of the boat. When underway, it will fluctuate, but so does our Tank Watch level sensor. The hardest part was getting the tank depth set. I kept pumping out to get as empty as I could. Whenever I would see a larger Sensor Value When Empty, I would update the settings. Unless you push the button to do a 10-second refresh, it will take longer for the value to change. Also, Victron Remaining value is actually the volume in the tank. Not sure if that is a Safiery problem or a Victron issue to resolve. Attached a couple of screenshots of my setup for comparison. (Yes - our tank is one of those 70-gallon ones that was reduced to 35 for placement of the bow thruster batteries. Ugh.)

Nick Vespa

LunaSea 5318

You can definitely tell in the attached picture when I had a pump out

I have 3 units on the way, so I hope the accuracy issue can be resolved! Have you tried reaching out to the manufacturer?

Steve

Kallisto 5369

Venus OS on Raspberry Pi (3B+) recognized the sensor no problem.

Getting accurate readings from the sensor is another story. Tried the different calibration techniques multiple times, different positions on tank.

Only had what I would consider an accurate reading a couple times and then no change when tank level changed.

BT levels to pilothouse seem strong. Tank is small and shallow. Maybe that's part of problem?

Considering swapping out the TW4 plug with a blank PVC plug and trying the sensor on top of that.

I'll keep messing with it but so far unimpressed.

Hoping to try this next next week (Raspberry Pi).

Will report back.

Here is where I placed mine. It's been working great.

Nick

LunaSea 5318

Should work the same as the Cerbo GX.

Nick

LunaSea 5318

Has anyone tried this for compatibility with the Venius OS on a Raspberry Pi?

Steve

Kallisto 5369

5393 has only a single 110gal tank and I put it right about middle-ish. The bluetooth dongle with the antenna works so much better.

Corey

Interesting...Maybe this is my issue? Where did you all place the sensor on your tanks? My MSR sensor still has issues where it thinks it is always full

Did the same. No issues since.

Nick

I replaced my UB500 nano bluetooth dongle in the Cerbo with the tplink UB500 Plus which has an antenna. So much better. Costs less than $20 bucks on amazon. My waste tank sensor appears to be tracking great now. Only a few anomalies in a week. See photo. Definitely recommending the radar tank sensor.

Corey

Leizu 5393

I installed a star-tank sensor on our blackwater tank today. 53-89 only has a single blackwater tank of 110 gals. It's definitely a shallow tank so I set it at the low setting for calibration. When the number comes up in the Cerbo settings for the device of depth at empty, is that based upon what the sensor detected or is it just a default? Mine said 20cm - which is definitely a bit shallow for the tank. Mine says it is 1in thick fiberglass so I set full at 3 cm. Our tank watch 4 is still operational so will be interesting to compare as it goes.

This is helpful. I remember seeing a sensor value of 27.5cm when placed on the tank under the middle stateroom bunk. I'll give it another go when I get back to the boat in a couple of weeks.

Thanks, everyone!

Nick

LunaSea 5318

Sensor set to small (0-50cm)

Sensor value when full 4.7cm (offset)

Sensor value when empty 22.0cm

Your tank may require slightly different numbers as it's a 70 gallon vs 65. These are easy to change, but hopefully it gets you started.

My sensor is now at the aft end of the tank. It's not ideal as they don't like them close to a side of the tank, but every spot I tried in the middle had issues. What I've also seen is these tanks have different locations for the various items mounted, so I'd just start with what looks like a good spot away from as many things as you can and towards the center and then adjust from there if you have issues.

Kevin

Endeavor 5329