| 2011 | SeoJin Instech Level Controller SLC-100U / SLCA-HL | |
| 2012 | SeoJin Instech Level Controller SEC 3U/5U | |
| 2013 | SeoJin Instech Level Controller SLIC-4P | |
| 2014 | SeoJin Instech Level Controller SLI-100U | |
| 2015 | SeoJin Instech Level Transmitter SDG-3000 | |
| 2016 | SeoJin Instech Level Transmitter SLA | |
| 2017 | SeoJin Instech Level Transmitter SMS | |
| 2018 | SeoJin Instech Level Transmitter SCAP-IV | |
| 2019 | SeoJin Instech Level Transmitter SLT | |
| 2020 | SeoJin Instech Level Transmitter SDT-420 | |
| 2021 | SeoJin Instech Level Transmitter SGL | |
| 2022 | SeoJin Instech Level Transmitter ST-600 | |
| 2023 | SeoJin Instech Level Switch SDS-3000 | |
| 2024 | SeoJin Instech Level Switch SC5/SB3 | |
| 2025 | SeoJin Instech Level Switch SPS/SR7 | |
| 2026 | SeoJin Instech Level Switch SCAP | |
| 2027 | SeoJin Instech Level Switch SRF | |
| 2028 | SeoJin Instech Level Switch SVL | |
| 2029 | SeoJin Instech Level Switch SPT/SPL | |
| 2030 | SeoJin Instech Level Switch SFP | |
| 2031 | SeoJin Instech Level Switch SMC-7 | |
| 2032 | SeoJin Instech Level Switch SMC | |
| 2033 | SeoJin Instech Level Switch SHM-200 | |
| 2034 | SeoJin Instech Level Switch SHM-100 | |
| 2035 | SeoJin Instech Level Switch SFM | |
| 2036 | SeoJin Instech Level Switch SFS-2 | |
| 2037 | SeoJin Instech Level Switch SF | |
| 2038 | SeoJin Instech Level Switch STT | |
| 2039 | SeoJin Instech Level Switch SH(SEC) | |
| 2040 | SeoJin Instech Level Switch SQ | |