Knick's Stratos pro Mettler M420 transmitter and the transmitter from the same source, but the specific details of the function even better, in the price, Strantos Pro lower. 

 1, with the corresponding two-wire, four-wire version. 
 2, according to conditions of light colored tips. 
 3, white backlight for easy display. 
 4, not only can access ISM electrode (Mettler), but also general memosens electrode (E + H), Inducon electrode (Hamilton). 
 5, with pH + DO, dual pH, conductivity and other two-module combination, select More 


 Germany 
 IP 67 protection class 
 Under the conditions of the backlight color tips 
 Universal temperature sensor Pt 1000/Pt100 
 Current Input 
 HART, IR, and other optional protocols 
 Digital electrodes, analog mixed-access electrode 
 Multi-channel, modular 
 District Ex 0,1,2 
 Prompted alarm color backlight