Below are some of key factor you shall consider while choosing a correct transmitter for your application 1)The input of the transmitter, if you are end user and looking for a cost down version solution, you might want go with the transmitter with a fixed input such as type K thermocouple or PT100, in this case, we as factory can preset the input and range of you, the transmitter will be installed right way after you get it from us, no extra programming is needed, saves time and efforts for you.  If you are stockiest looking to build up some stocks in your disposal, then our universal input transmitter is an ideal choose. Transmitter compatible with both TC and RTd input, and programmable via PC and android device.   2)Output is another key factor to consider, in many cases, 4-20mA output will be the choice for output, but some of customer will need 0-10VDC output too, we can offer both, our TT-210 is 4-20mA output version, and TT-500 is 0-10Vdc output version   3)Some o...