Yes!
In seawater there is between 50 and 70 mg/l (ppm) of bromide salts. As chlorine is more reactive than bromine the chlorine replaces the bromide and the bromine is released to become HOBr (Hypobromous acid) and OBr- (hypobromite). Even though it is the bromine that does the disinfection people around the world still refer to it as chlorination. The Free Chlorine and Total Chlorine sensors can work in seawater measuring free and total bromine. Please do tell us though if you are going to measure sea water because the electrolyte is different as it has a higher salt content to resist the osmotic pressure of seawater.
