MK 9151N - level relay

Application

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 tasks, e.g. recording temperature limits with PTC

Contact protection relay with delay

Features

3 electrode connections for 2-point and 1-point level control

Measuring circuit for electrodes works on AC voltage generated internally in the device (approx. 30 Hz); therefore no electrolysis occurrence in the fluid

The measuring circuit galvanically isolated from the mains is immune from high levels of interference

Max. lead length to the electrodes: 3000 m

Wide setting range: 2 kΩ → 450 kΩ which enables differentiation between liquid and foam

Response and fallback delay: 0.2 s → 20 s, adjustable separately for MIN and MAX level

Programmable for operating or rest current principle

LEDs to indicate operational readiness and contact position

Output contact 2 changeovers

Overall width: 22.5 mm

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

Approvals

Standards

IEC/EN 60 255, DIN VDE 0435-303

Units	Per unit
1 - 4	R 3,766.56
5 - 9	R 3,672.40
10 +	R 3,562.23

Select all	Attribute	Value
	Brand	Dold
	Number of Inputs	1
	Mounting Style	DIN Rail
	Probe Voltage	10V ac
	Supply Voltage	230 V ac
	Overall Length	90mm
	Overall Width	22.5mm
	Overall Depth	98mm
	Minimum Operating Temperature	-20°C
	Maximum Operating Temperature	+60°C

	Select all
	Brand Dold
	Number of Inputs 1
	Mounting Style DIN Rail
	Probe Voltage 10V ac
	Supply Voltage 230 V ac
	Overall Length 90mm
	Overall Width 22.5mm
	Overall Depth 98mm
	Minimum Operating Temperature -20°C
	Maximum Operating Temperature +60°C

Dold Liquid Level Relay - DIN Rail, 230 V ac 1

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