Temp gauge in heater hose, will this work ?

[blazer2007]

I have a 89 jeep cherokee and this home made fitting was installed on the heater hose for a mech. gauge but the gauge line was broken when I bought it. I would like to use a elec. sending unit gauge, never had much luck with the small dia. mech. gauge sending units ,seem to last a year or so. If I put a adapter to run a elec. gauge in this home made fitting will I get a proper reading with the sending unit being too far from the main stream of the coolant? I also believe he has it on the wrong heater hose, would it still tell me the temp? I still want to keep the idiot line gauge and don,t want to play with the stock fitting