8
Installation
1.
Determine the best location for the temperature sensor in the DEF line. Figure 2 shows a typical temperature
sensor installation in the DEF dispenser pan furthest from the DEF tank. Each site should be evaluated to
determine the best location for the temperature sensor.
2.
Install a bushing in the line which has a female 1/2” NPT port at the desired sensor location (see example in
Figure 2).
Figure 2. DEF Temperature Sensor Example Installation
3.
Apply non-setting, DEF-compatible thread sealant to the external 1/2” NPT threads on the tube fitting and
install it into the bushing.
4.
Loosen the nut on the tube fitting and insert the temperature sensor into the tube fitting enough, but not more
than 6”, to ensure the 1/4” diameter section of the sensor is inside the tube fitting.
5.
Tighten the nut on the tube fitting 1-1/4 turns beyond hand tight.
6.
Figure 3 shows a typical DEF recirculation return line fittings in the DEF pump sump.
When routing the return to the tank it is recommended that the return line be extended near
the bottom of the tank to avoid any disruption to the tank probe’s readings.
DEF Flow To
Dispenser
Meter
DEF Dispenser
Pan
DEF Flow
From Tank
DEF Return
Flow To Tank
DEF Fluid
Temperature
Sensor
Bushing With
1/2” Female Port
Junction Box
And Seal Off
(Customer
Supplied)
Wiring
To ATG
NOTICE
