# Resin sensor issues with Black and ESD resins **URL:** \ **Category:** Support & Troubleshooting\ **Created:** [November 1, 2023, 7:12pm UTC](https://forum.formlabs.com/t/resin-sensor-issues-with-black-and-esd-resins/37177 "2023-11-01T19:12:50Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![wolfmannm](https://avatars.discourse-cdn.com/v4/letter/w/4bbf92/32.png) [@wolfmannm](https://forum.formlabs.com/u/wolfmannm)\ **Post date:** [November 1, 2023, 7:12pm UTC](https://forum.formlabs.com/t/resin-sensor-issues-with-black-and-esd-resins/37177/1 "2023-11-01T19:12:50Z")
I’m using Form 3+ and Form 3L printers. After the most recent firmware update, I have been having some issues with the resin sensors when using Black and ESD resins. Just prior to the new firmware I had run some other prints with Black resin on the 3+ printer and it had run without an issue. I tried the same tank and bottle of Black on 2 different Form 3+ printers. The first one had a resin sensor error. I hit retry about 5 times and then decided to transfer the tank and bottle to another printer. The second one stuck on filling. It errored several times saying the tank was not filling but I could see resin coming from the bottle. It got to the point I was concerned it would over fill, (the mixer was pushing resin to about a half inch below the lip of the tank) so I aborted the print. There does not seem to be an issue with the bite valve and the resin looks to be flowing into the tank. I used Clear resin on both printers and had no issues. The tank is relatively new, less than 6 months old and fewer than 20 prints. I’m not sure how many layers I have done. I’m also having the resin sensor error on the 3L using ESD resin. This happened about 85 or 90% of the way through a print. The first error said that the tank was not filling, so I checked the bottles and both of them were mostly full and both bite valves were opening correctly. I forced it to retry about 10 times and then the error changed to say that there was a resin level sensor error. I looked at the resin level in the tank and it looked fine so I told it to ignore the error and the print finally finished. The tank is brand new and I manually filled it with 1L of resin before starting the print with 2 full liters installed. I had just finished using Clear resin right before the firmware update and material change. Prior to that I had been running Grey Resin. I have had no problems with them. Just prior to the new firmware I had run some other prints with Black resin on the 3+ printer and it had run without an issue. ---
**Author:** ![Jesse\_K](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.formlabs.com/jesse_k/32/18872_2.png) [@Jesse\_K](https://forum.formlabs.com/u/Jesse_K)\ **Post date:** [November 2, 2023, 11:33pm UTC](https://forum.formlabs.com/t/resin-sensor-issues-with-black-and-esd-resins/37177/2 "2023-11-02T23:33:33Z")
Hi @wolfmannm, Thank you for getting in touch! I’m sorry to hear about the resin sensor-related errors you encountered with your printers. Given that there may be a problem with multiple printers, [creating a Support case](https://support.formlabs.com/s/contact-support?language=en_US) will be the best way for us to advise more thoroughly. For resin sensor errors in particular, a few initial steps would be to power cycle the printers, ensure the [printers are level](https://support.formlabs.com/s/article/Leveling-Formlabs-SLA-printers), and [Recalibrate the LevelSense board](https://support.formlabs.com/s/article/Form-3-error-messages#cannot-read-sensor) (for Form 3). ---
**Author:** ![system](https://us1.discourse-cdn.com/flex025/uploads/formlabs/original/3X/5/b/5bc2bdf993ff27c2e0eecab5010b25626fbb327a.png) [@system](https://forum.formlabs.com/u/system)\ **Post date:** [May 3, 2024, 11:34am UTC](https://forum.formlabs.com/t/resin-sensor-issues-with-black-and-esd-resins/37177/3 "2024-05-03T11:34:30Z")
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