Capacitive Level Sensor E7B
Compact, High Sensitivity Level Sensor
Uses Capacitance to Detect Product
Submersible oil resistant construction for use in
aggressive environments.
Low mutual interference enables close mounting of
multiple units.
Installation with E7U controller provides dual sensor
control for dependable high–low level control.
Ordering Information
Function
type
Probe type
Detectable material
Controller unit
Sensing probe
General purpose
Polyacetal covered
stainless steel
See chart
E7U E7B-311M
High sensitivity type
Stainless steel
E7B-111
Specifications Type
Item E7B–111 E7B–311M
Supply voltage
24 VDC (ripple: 10% max.)
Operating voltage range
±
15% of rated voltage
Current consumption
21 mA max.
Oscillation frequency
Approx. 600 kHz
Operating sensitivity
0 to 20 pF 0 to 100 pF
Stable operating sensitivity
1.5 pF max. 5.0 pF max.
Control Output
Solid–state output: 24 VDC 100 mA max. (output resistance: 6.8 k
Ω)
V
ariation due to temperature
fluctuation
0.8 pF max.
1.5 pF max. (within ambient operating
temperature range)
V
ariation due to voltage fluctuation
0.2 pF max.
1.0 pF max. (within operating voltage range)
Min. permissible resistance by
material adhering to electrode
100 k
Ω
min.
30 k
Ω
min.
Insulation resistance
Data are excluded because case is grounded
Dielectric strength
Vibration
(mechanical durability)
10 to 25 Hz, 1.5 mm double amplitude
Shock
(mechanical durability) 200 m/s
2
(approx. 20 G’
s)
Pressure resistance of electrode
16 kg/cm
2
max.
Ambient temperature
Operating: –10
°
to 70
°C
Ambient humidity
Operating: 35% to 95% RH
Degree of protection
Submersible construction (JIS C0920), IP67 (IEC 144)
W
eight (circuit section)
Approx. 600 g (E7B-1
11)
