Dold MK 9151N Series Liquid Level Relay -, DIN Rail 1 Voltage Input 230 V ac-Rated Relay

RS Stock No.:: 465-0621
Mfr. Part No.:: MK9151N.12 2-450kOHM AC230V 0-20s
Manufacturer:: Dold

Dold MK 9151N Series Liquid Level Relay -, DIN Rail 1 Voltage Input 230 V ac-Rated Relay

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HK$1,520.50

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Shipping from 06 March 2026

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Units	Per unit
1 - 4	HK$1,520.50
5 +	HK$1,453.80

*price indicative

RS Stock No.:: 465-0621
Mfr. Part No.:: MK9151N.12 2-450kOHM AC230V 0-20s
Manufacturer:: Dold

Specifications

Product overview and Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Dold
	Product Type	Liquid Level Relay
	Number of Inputs	1
	Probe Voltage	10V ac
	Overall Length	90mm
	Mount Type	DIN Rail
	Response Time	20s
	Overall Depth	98 mm
	Minimum Operating Temperature	-20°C
	Terminal Type	Clamp
	Maximum Operating Temperature	60°C
	IP Rating	IP40, IP20
	Maximum Supply Voltage	230V ac
	Overall Width	22.5mm
	Standards/Approvals	IEC, CE
	Hazardous Area Certification	No
	Number of Outputs	2
	Input Type	Voltage
	Series	MK 9151N
	Output Type	Relay
	Current Rating	4 A

	Select all
	Brand Dold
	Product Type Liquid Level Relay
	Number of Inputs 1
	Probe Voltage 10V ac
	Overall Length 90mm
	Mount Type DIN Rail
	Response Time 20s
	Overall Depth 98 mm
	Minimum Operating Temperature -20°C
	Terminal Type Clamp
	Maximum Operating Temperature 60°C
	IP Rating IP40, IP20
	Maximum Supply Voltage 230V ac
	Overall Width 22.5mm
	Standards/Approvals IEC, CE
	Hazardous Area Certification No
	Number of Outputs 2
	Input Type Voltage
	Series MK 9151N
	Output Type Relay
	Current Rating 4 A

Datasheet - IL9151

COO (Country of Origin):: DE

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