4
E2K-L
Liquid Level Sensor
■
Characteristics
*
In the following cases, stable detection may not be possible and so be sure to confirm correct operation in the actual installation before use.
1. If the dielectric constant or conductivity of the liquid is low.
2. If the capacity of the liquid is small, or if the pipe diameter is so small or the walls of the pipe are so thick that the amount by which the
capacity changes in proportion to the level of the liquid is small.
3. If there are a lot of bubbles or a highly viscous liquid film residue on the inside walls of the pipe, or if there is a build up of dirt on the inner or
outer walls of the pipe.
■
Output Circuit Diagrams
Item
Model number
E2K-L13MC1
E2K-L26MC1
Applicable
pipes
Material
Non-metal
Size
External
diameter
8 to 11 mm-dia.
12 to 26 mm-dia.
Wall
thickness
1 mm max.
1.5 mm max.
Sensing object
Liquid
*
Repeat accuracy
±
0.2 mm max.
Hysteresis (reference value only;
varies with pipe size and solution)
0.6 to 5 mm
0.3 to 3 mm
Supply voltage
(operating voltage range)
12 to 24 VDC, 10% max. ripple (10.8 to 30 VDC)
Current consumption
12 mA max.
Control
output
Switching capacity
100 mA max.
Residual voltage
1 V max. (for load current of 100 mA cable length of 2 m)
Detection position of liquid
surface
Notch position (For details, refer to Sensitivity Adjustment on page 6.)
Indicator
Operation indicator (orange)
Ambient temperature
Operating: 0 to 55
°
C; Storage:
-
10 to 65
°
C (with no icing or condensation)
Ambient humidity
Operating/storage: 25% to 85% (with no condensation)
Temperature influence
In the range 0 to 55
°
C: Detection level at 23
°
C
±
4 mm
(with distilled water or 20% concentration salt water)
(
±
6 mm with E2K-L13MC1 for distilled water in pipe of diameter 8 mm)
Voltage influence
At the rated power supply voltage
±
10%: Detection level at rated power supply voltage
±
0.5 mm
Insulation resistance
50 M
W
min. (at 500 VDC) between charged parts and case
Dielectric strength
500 VAC, 50/60 Hz for 1 minute between charged parts and case
Vibration resistance (destruction)
10 to 55 Hz with a 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions
Shock resistance (destruction)
500 m/s
2
for 3 times each in X, Y, and Z directions
Enclosure rating
IEC60529 IP66
Connection method
Pre-wired (standard cable length: 2 m)
Weight (packed state)
Approx. 70 g
Material
Case, cover
Heat-resistant ABS resin
Cable clamp
NBR
Accessories
2 binding bands, 4 slip-prevention tubes, instruction manual
Output
format
Model number
Timing chart
Output circuit
NO
E2K-L13MC1
E2K-L26MC1
Yes
No
Operates
Releases
ON
OFF
Load
(brown-black)
Operation indicator
(orange)
Liquid surface
brown
+V
0V
black
∗
∗
100 mA max. (load current)
blue
Main circuit
Load
