2011 ------ 144*144 transmitter, pH/ORP transmitter, conductivity transmitter, membrane oxygen transmitter.

2012 ------  96 *96 type transmitter, pH/ORP transmitter, conductivity transmitter, membrane oxygen transmitter.

2013 ------ ion transmitter, fluorescent oxygen transmitter.

2014-2015 ------ residual chlorine transmitter, turbidity/suspension/sludge concentration transmitter.

2016 ------ ammonia nitrogen/nitride transmitter.

2017 ------ digital electrode, chlorophyll transmitter, blue-green algae transmitter.

2018----multi-parameter controller

2019----digital hydrongen and nitrogen electrodes /digital nitrate electrode

2020----fluorescent oxygen,turbidity and other optical sensors

2021----multi parameter analyzer universal controller