CONTROLS CONTROLS
NRT SERIES
LIQUID LEVEL CONTROL
CONSTANT LEVEL
PUMP UP
UL listed CSA recognized
•100 kΩSensitivity
•10 Amp SPDT Relay
•Maintain Constant Level
•Four Mounting Options
SPECIFICATIONS:
Input . . . . . . . . . . . . . . . . . . . . . . . . 24 VAC, 48 VAC, 110 VAC
220 VAC, ± 15%, 50/60 Hz
Maximum power consumption . . . 24 VAC: 1.5 VA
48 VAC: 1.7 VA
110 VAC: 2 VA
220 VAC: 2 VA
Output . . . . . . . . . . . . . . . . . . . . . . SPDT Relay
Contact material . . . . . . . . . . . . . . AgCdO
Maximum loading . . . . . . . . . . . . . 10 A AC resistive 8 A Dc resistive
Maximum switching voltage . . . . . 250 VAC 250 VDC
Relay maximum power rating . . . . 2500 VA 80 W
Mechanical life of relay . . . . . . . . . 3 x 107operations
Electrical life of relay . . . . . . . . . . . 2 x 105at 2200 VA resistive load
Probe isolation . . . . . . . . . . . . . . . Switching contact 2000 VAC
Electrodes: 2000 VAC
Probe sensitivity . . . . . . . . . . . . . . 100 kΩ
Probe voltage . . . . . . . . . . . . . . . . 24 VAC, 60 Hz
Probe current . . . . . . . . . . . . . . . . . 1 mA max.
Operating temperature . . . . . . . . . +14°F to +140°F -10°C to +60°C
Weight . . . . . . . . . . . . . . . . . . . . . . 7 oz. (200g)
Note: The probe cables (max. 300ft) need not be shielded; however, it is
not advisable to run the probe cables with power cables. If shielded cable
is used, the shield and common should be connected.
MOUNTING
D= DIN-rail or panel mounting
L= 11 pin plug-in
P= 8 pin plug-in
N= open PC board
SERIES
NRT = Enclosed
NNRT = Open PC board version mounting
dimensions same as NNR
P
MOUNTING
NRT
SERIES
110A
INPUT POWER
INPUT POWER
24A = 24 VAC
48A = 48 VAC
110A = 110 VAC
220A = 220 VAC
WIRING DIAGRAM:
ORDERING INFORMATION:
The NRT series is applied for maintaining a constant level of
conductive liquid. When the liquid decreases below the probe,
the relay is energized after a 4 second time delay to avoid wave
disturbances. The relay de-energizes when the liquid reaches
the probe. A common electrode is needed if the container is
non-conductive.
s
0 t
R
Level
TT
0.3 s
11
12 14
C
R
1
2
3
4
567
8
9
10
11 1
2
3
45
6
7
8
DNRT PNRTLNRT
A1
A2
RR
SSS
Max C C Max
min
˜
˜
max
Products and specifications subject to change without notice.
Consult factory for application assistance.
204 Airline Drive, Suite 300, Coppell, Texas 75019 / Tel: (800) 677-5311 / FAX: (800) 677-3865 / www.crouzet-usa.com
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