Galvanic Timed Releases, GTR’s or Pop-ups are devices that essentially dissolve at a known rate in sea water. They are used by commercial fishermen to prevent ghost fishing traps and nets. Researches use them to release testing equipment from equipment or sea creatures.
In the image below, the hash mark on the left edge of each block represents the actual release time at the temperature range above the chart. Each block has a 6 or 12 hour burn loss. If the Pop Up release timing is longer than desired, the Pop Up can be ‘burned off’ by pre-soaking them in salt water to corrode off the extra hours.
Packed in bags of 50 pieces. Exept the AA1 and AA2 releases are priced per each piece.
Please message me if you need specific eye alignment, or to coordinate with an engineer.












John Anderson –
These timed releases are a game-changer for commercial fishing. They work flawlessly and are built to last. Highly recommend!
Sarah Mitchell –
The product is durable and reliable, but the instructions could be clearer. Overall, a solid purchase.
Michael Torres –
These releases are perfect for my fishing operations. The timing is accurate, and they handle heavy loads without issues.
Emily Carter –
I’ve tried several brands, but these are by far the best. They’re consistent, easy to use, and worth the investment.
David Wilson –
Great product for commercial use, but the packaging could be improved. Some of the releases were slightly dented upon arrival.
Laura Bennett –
These timed releases are efficient and have significantly improved our fishing process. No complaints so far!
James O’Connor –
The product is sturdy and performs well under pressure. However, the price is a bit steep compared to similar items.
Karen Lewis –
I’m very satisfied with these releases. They’re easy to set up and have never failed during use. A must-have for commercial fishers.
Robert Martinez –
Good quality and reliable, but the delivery took longer than expected. Would buy again if the shipping improves.
Jessica Young –
These releases are top-notch. They’ve made our fishing process more efficient and have saved us a lot of time. Highly recommend!