1
Introduction
Overview
A Diesel Exhaust Fluid (DEF) Recirculating Temperature Sensor monitors the temperature in the DEF fluid
between the DEF tank and the DEF dispensers to prevent DEF fluid from freezing in the lines or degrading at high
temperatures (see Figure 1). When the sensed temperature drops or rises to a preset temperature, the ATG can
turn on the DEF pump to recirculate the DEF fluid throughout the piping until the product temperature reaches a
preset stop temperature. The ATG can also control a customer supplied Heat Trace System independently or
concurrently with the DEF pump.
Figure 1. DEF Fluid Temperature Monitoring Components
DEF Dispenser
DEF Dispenser
Heat Trace manufacturer required
GFI EPD circuit breaker per NEC
Article 427-22
To optional
Heat Trac
DEF Temperature Sensor
(Up to 2 depending on
application requirements)
Mag
Probe
DEF Tank
MP
H
Controller
Hook
Pump Power
H
TS
Pump
L
L
N
N
G
T 2: DELIVERY NEEDED
12/20/2012 06:01 PM
Tank Overview
TANK 1: reg
Fuel Volume
3655
Fuel Height
38.6
Ullage 100%
6345
Temperature
61.9
Water Height
3.0
1 Warning(s)
0 Alarms(s)
Print (0)
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Overview
TANK 2: diesel
Fuel Volume
1600
Fuel Height
20.6
Ullage 100%
8345
Temperature
60.8
Water Height
0.0
!
From
Distribution
Panel
Intrinsically safe
Intrinsically safe
