Dold Liquid Level Relay - DIN Rail Mount, 220 → 240 V ac 1 Input

  • RS Stock No. 240-9011
  • Mfr. Part No. MK9151.11 2-450kOhm AC220-240V
  • Manufacturer Dold
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): DE
Product Details

MK 9151 - level relay

The MK9151 is used for

Level monitoring and control of conductive liquids and powders, e.g. maximum and minimum fill level, protection against overfilling and dry running
Monitoring and control of the mix ratio for conductive liquids
General resistance monitoring, e.g. recording temperature limits with PTC (device to IEG 255, VDE 0435 section 303)


3 electrode connections for 2-point and 1-point level control
The metering circuit galvanically isolated from the mains is immune from high levels of interference
Max. lead length to the electrodes: 1500 m
Wide setting range: 2 → 450 kΩ which enables differentiation between liquid and foam
Adjustable response and fallback delay: 0.2 → 20 s
Programmable for working current principle (without bridge) or rest current principle (X1-X2 and/or X1-COM bridge)
2 LEDs to indicate operating readiness and contact position
1 changer
Overall width 22.5 mm, protection class IP40


Liquid Level Relays are used to monitor the levels of conductive liquids, and are available in Up/Down, Minimum, Maximum, and Fill/Empty variations. Liquid Level Relays are straightforward to install and safe to use.

Application Examples

Liquid Level Relays (Conductive Level Sensors) are used in a wide variety of applications including waste water management and the monitoring and management of corrosive liquid media, and designed specifically to provide for the:

Monitoring and control of liquid levels
Protection of pumps against dry running
Ability to detect liquid leaks in a system
Control of media mixing ratios
Control of liquid levels

Attribute Value
Number of Inputs 1
Mounting Style DIN Rail Mount
Probe Voltage 10V ac
Supply Voltage 220 → 240 V ac
Overall Length 82mm
Overall Width 22.5mm
Overall Depth 99mm
Minimum Operating Temperature -20°C
Maximum Operating Temperature +60°C
2 Within 5 working day(s) (Global stock)
16 Within 5 working day(s) (Global stock)
Price (ex. GST) Each
$ 232.90
(exc. GST)
$ 267.84
(inc. GST)
Per unit
1 +
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