Dold Liquid Level Relay - DIN Rail, 220 → 240 V ac 1
- RS Stock No.:
- 240-9011
- Mfr. Part No.:
- MK9151.11 2-450kOhm AC220-240V
- Brand:
- Dold
Subtotal (1 unit)*
£148.35
(exc. VAT)
£178.02
(inc. VAT)
FREE delivery for orders over £50.00
In Stock
- Plus 7 unit(s) shipping from 20 October 2025
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit |
---|---|
1 + | £148.35 |
*price indicative
- RS Stock No.:
- 240-9011
- Mfr. Part No.:
- MK9151.11 2-450kOhm AC220-240V
- Brand:
- Dold
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
---|---|---|
Brand | Dold | |
Number of Inputs | 1 | |
Mounting Style | DIN Rail | |
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 | |
Select all | ||
---|---|---|
Brand Dold | ||
Number of Inputs 1 | ||
Mounting Style DIN Rail | ||
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 | ||
- COO (Country of Origin):
- DE

Dold Level Relay
The Dold MK9151 series liquid level relay is a single input and DIN rail mount device. It monitors and controls conductive liquids and powders, example maximum and minimum fill level, protection against overfilling and dry running. The 3-probe connections for 2-point and 1-point level control. It has 220VAC to 240VAC supply voltage. General resistance monitoring, example recording temperature limits with PTC (device to IEG 255, VDE 0435 section 303). This device is straightforward to install and safe to use.
Features and Benefits
High interference resistance of the measuring circuit, which is isolated from the mains
Maximum wire length to the probes is 1500m
Large setting range between 2kohm and 450kohm which permits differentiation between fluid and foam
Adjustable response and release time delay: 0.2seconds to 20seconds
Programmable for open circuit operation (without bridge) or closed circuit operation(bridge X1-X2 or X1-COM)
Green LED for operation
Yellow LED for contact position
1 or 2 changeover contacts
Also available with a sealable transparent cover
Maximum wire length to the probes is 1500m
Large setting range between 2kohm and 450kohm which permits differentiation between fluid and foam
Adjustable response and release time delay: 0.2seconds to 20seconds
Programmable for open circuit operation (without bridge) or closed circuit operation(bridge X1-X2 or X1-COM)
Green LED for operation
Yellow LED for contact position
1 or 2 changeover contacts
Also available with a sealable transparent cover
Applications
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
General resistance monitoring tasks, e. G. limit temperature detection with PTC
Protection of pumps against dry running
Ability to detect liquid leaks in a system
Control of media mixing ratios
Control of liquid levels
General resistance monitoring tasks, e. G. limit temperature detection with PTC
Certifications
IEC/EN 60 255
DIN VDE 0435-303
IEC/EN 61 140
IEC/EN 60 947-1
CSA approval
IP40 rated
DIN VDE 0435-303
IEC/EN 61 140
IEC/EN 60 947-1
CSA approval
IP40 rated
Related links
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- Dold Liquid Level Relay - DIN Rail, 230 V ac 1
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- ABB Liquid Level Relay - DIN Rail Snap-On, 220 → 240 V ac
- Dold Level Monitoring Relay, DIN Rail
- ABB CM-ENS Series Liquid Level Relay - DIN Rail, 24 → 240 V ac/dc 1 Voltage Input SPDT Relay
- ABB Liquid Level Relay - DIN Rail Snap-On, 24 V ac
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