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Liquid level monitoring relay MRL01

MRL01 is a double function level relay designed to control maximal and minimal level of conductive liquid in the vessel.

The relay can be used to pump liquid up (function UP) or to pump liquid down (function DOWN). In case that the vessel is made from conductive material it can be used instead of GND probe.

The relay uses for measurement AC current which avoids electrolysis and probes oxidation. The relay has one double-throw output contact 8 A.

  • two functions: pump UP or pump DOWN
  • time hysteresis for liquid waves limitation
  • AC signal to avoid electrolysis and probes oxidation
  • probes error diagnostic
  • universal power supply 89 ... 264 VAC
  • DFT (Discrete Fourier Transformation)
  • digital optical operation status signalisation
MRL01
Image

PUMP UP

If the level decreases below the minimal limit and it remains that way for the time of 5 s at least, the relay will start the pump-up process. In the moment after the maximal limit being exceeded for more then 5 s, the relay stops the pump-up process.

Image

PUMP DOWN

If the level exceeds over the maximum limit and it remains that way for the time of 5 s at least, the relay will start the pump-down process. In the moment after the minimal limit being exceeded for more then 5 s, the relay stops the pump-down process.

Technical features

Parameter Value
supply voltage 89 ... 264 VAC
self consumption max. 1.5 VA
sensitivity 5 kOhm ... 100 kOhm
delay for liquid waves elimination 1.5 sec
number and type of output contacty 1x changeover
nominal current 16 A
switching power max. AC 4000 VA
trigger current 30 A
nomina/max switching voltage 250 VAC / 440 VAC
mechanical life time 3 x 107
electrical life time 1 x 105 250 VAC, 8 A
ambient temperature -20 ... +55 °C
working position any
mounting IEC 60715 (DIN 35)
protection degree IP 20
Izolace vstup-výstup 4 kV
maximum input wire diameter max. 2 x 1.5 mm2; 1 x 2.5 mm2
weight 85 g
dimensions 90 x 18 x 65 mm

Contact

BMR trading - Hasal s.r.o.
Horní lán 1200/17
779 00 Olomouc
Czech Republic

+420 778 066 566

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