Crouzet 84870306 Data Sheet
Plug-in Mount 39 mm LN Part number 84870306
Relay for controlling level of conductive liquids
Output relay status display LED
Sensitivity adjustable from 5 kΩto 100 kΩ
LN
Relay for controlling level of conductive liquids
Regulation of two levels : minimum, maximum
Empty function
Plug in (8 or 11 pins)
Sensitivity adjustable from 5 kΩto 100 kΩ
LN2
Combined fill and empty functions
Combined regulation of pumping out a well and filling a tank
Plug in (11 pins)
Part numbers
Specifications
Operating principle
Control of maximum and/or minimum levels of conductive liquids (tap water, sea water, waste water, chemical solutions, coffee etc).
The principle is based on measurement of the apparent resistance of the liquid between two submerged probes. When this value is lower than the preset threshold on the unit front face, the output
relay changes state. To avoid electrolytic phenomena, an AC current funs across the probes. Applications found in environmental, chemical industries and food technology etc.
Regulation of two levels : Minimum / Maximum
The output relay changes state when the level of liquid reaches the maximum electrode, with the minimum electrode submerged. It returns to its initial state when the minimum probe is no longer in
contact with the liquid.
Note
The probe wire (max length 100 metres) does not have to be screened, but avoid mounting it in parallel with the power supply wires. A screened wire can be used, with the screening connected
to the common.
Type
Supply voltage
Base
84 870 306
LN
24 V AC
11-
pin
Supply voltage Un
230 V, 110 V, 48 V, 24 V AC, 50/60 Hz
Operating range
0,85→1,15xUn
Max. absorbed power
3 VA
Adjustable sensitivity
5 k
Ω
→100k
Ω
Measurement accuracy (at maximum sensitivity)
0→+30%
Electrode voltage (max)
24 V AC (50/60 Hz)
Electrode current (maximum)
1 mA (50/60 Hz)
Maximum cable capacity
10 nF Response time high level
300 ms
Response time low level
500 ms
Output relay (according to AC1 resistive load)
1 AgCdO switch 8 A AC max.
Galvanic isolation via transformer (4 kV, 8 mm creepage
distance)
Class II
Isolation of contacts and electrodes from power supply
2,5 kV AC
Temperature limits use (°C)
-
20→+60
Temperature limits stored (°C)
-
30→+70
Weight (g)
140
Principles
20/10/2014 www.crouzet.com
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
TRADOS Empty Field
N
o
Legend
Max. level
Min. level
Output relay
Down
Unit power-up
Controlled level
Empty function
Dimensions (mm)
LN
Dimensions (mm)
LN connector sockets
8-pin : 25 622 129
11-pin : 25 622 078
Connections
LN
20/10/2014 www.crouzet.com
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
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