ENS 3000 Series

The ENS 3000 is an electronic level switch with integral display. The unit has 1,2 or 4 switching outputs and an analogue output signal as an option.

Along with the standard minimum and maximum switch points, it is now possible with the 4 output version, to set additional warning signals to prevent problems such as tank overflow or aeration of the pump.

The ENS 3000 is suitable for oil as well as water. The fluid type can be selected via the menu.

The main applications of the ENS 3000 are primarily found in hydraulics, e.g. for fluid level monitoring of a tank.


Technical Details


Fluid level Sensor type capacitive fluid level sensor
Probe length 9.80˝, 16.20˝, 20.50˝, 28.70˝
Active zone 6.70˝, 10.20˝, 14.20˝, 23.20˝
Inactive zone 3.10˝, 5.95˝, 6.35˝, 5.50˝
Maximum speed of
change in fluid level
9.80˝ : 4.57˝/s
16.20˝ : 2.36˝/s
20.50˝ : 3.15˝/s
28.70˝ : 3.94˝/s
Repeatability ≤ 2 %FS*
Switching point accuracy ≤ 2 %FS
Temperature Sensor type semiconductor sensor
Measuring range 13° to 212°F (-25° to 100°C)
Accuracy ± 2.7°F (1.5°C)
Reaction speed (T90) 180 s


Analogue output With 1 or 2 SP: selectable 0 to 10V or 4 to 20mA;
0 to 10V (ohmic resistance min. 1 kΩ) or
4 to 20mA (ohmic resistance max . 500Ω)
corresponds to measuring range
With 4 SP: 0 to 10V (ohmic resistance min. 1 kΩ)
corresponds to measuring range
Switching output 1, 2 or 4
Type PNP transistor output
Programmable as N/O or N/C
Assignment of switching output Temperature or fluid level (user selectable)
Switching current 1 or 2 SP: max. 1.2 A each 4 SP: max. 0.25 A each
Switching cycles > 100 million


Ambient temperature range 32° to 140°F (0° to 60°C)
Operating temperature range 32° to 140°F (0° to 60°C)
Storage temperature range -40° to 176°F (-40° to 80°C)
Fluid temperature range 32° to 140°F (0° to 60°C)**
CE mark EN 61000-6-1, EN 61000-6-2
EN 61000-6-3, EN 61000-6-4
Vibration resistance approx. 5 g
Shock resistance approx. 25 g


Max. tank pressure 7 psi (temporary 40 psi, t < 1 min)
Supply voltage 18 to 35 V with analogue output
9 to 35 V without analogue output
Protection class IP 67
Fluids Hydraulic oils (mineral based) synthetic oils, water containing fluids***
Components in contact with the fluid Ceramic
Display 4 digit, 7-segment LED, red height of digits 0.28˝
Residual ripple supply voltage ≤ 5%
Protection against reverse polarity of the supply voltage,
excess voltage, override and short-circuit protection
Note: FS (Full Scale) = relative to the full measuring range
*specified for calm, non-turbulent fluid
**larger temperature range on request
***other fluids on request