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Dold MK 9151N Series Liquid Level Relay DIN Rail Mount 24V DC Input Voltage 4A Current MK9151N.12 2-450kOHM DC24V 0.2-20s
Specifications
| Country of Origin | Germany |
|---|---|
| Voltage | Input 24V dc-Rated Relay RS Stock No |
| Brand | Dold |
| Response time | 20s |
| Model | MK9151N.12 2-450kOHM DC24V 0.2-20s |
| IP Rating | IP20, IP40 |
| Mount Type | DIN Rail |
| Overall Length | 90mm |
| Current Rating | 4A |
| Number of inputs | 1 |
| Output type | Relay |
| Series | MK 9151N |
| Overall Width | 22.5mm |
| Input Type | Voltage |
| Maximum Operating Temperature | 60°C |
| Minimum Operating Temperature | -20°C |
| Number of outputs | 2 |
| Terminal type | Clamp |
| Standards/Approvals | IEC, CE |
| Maximum Supply Voltage | 24V dc |
| Overall Depth | 98mm |
| Probe Voltage | 10V ac |
| Max. lead length to the electrodes | 3000 m |
| Response and fallback delay | 0.2 s → 20 s, adjustable separately for MIN and MAX level |
| Wide setting range | 2 kΩ → 450 kΩ which enables differentiation between liquid and foam |
Key Features
- Equipped with 3 electrode connections supporting 2-point and 1-point level control.
- Measures electrode resistance using internally generated AC voltage to prevent electrolysis.
- Galvanically isolated measuring circuit provides immunity from electrical interference.
- Wide setting range from 2 kΩ to 450 kΩ enables foam and liquid differentiation.
- Response and fallback delays adjustable from 0.2 to 20 seconds for MIN and MAX levels.
- Includes LEDs indicating operational readiness and contact position.
- Compact overall width of 22.5 mm suitable for DIN rail mounting.
- Output has 2 changeover relay contacts with 4A current rating.
Product Description
Dold MK9151N.12 2-450kOHM DC24V 0.2-20s is a Liquid Level Relay designed for precise level monitoring and control of conductive liquids and powders. Featuring a DIN rail mount, this device operates at an input voltage of 24V DC and offers a current rating of 4A with relay output type. It is ideal for applications requiring maximum and minimum fill level detection, overfill protection, dry running prevention, and monitoring of conductive liquid mixing ratios.
The relay includes 3 electrode connections supporting both 2-point and 1-point level control methods. The measurement circuit uses an internally generated AC voltage of approximately 30 Hz, effectively preventing electrolysis in the fluid. The galvanic isolation of the measuring circuit ensures immunity from electrical interference, supporting long lead lengths up to 3000 meters.
With a wide setting range from 2 kΩ to 450 kΩ, the relay can distinguish between liquid and foam states. Users can independently program response and fallback delays spanning from 0.2 seconds to 20 seconds for both minimum and maximum level detection. The relay features programmable operating or rest current principles and LED indicators for operational readiness and contact status.
3 electrode connections for flexible level control. Internally generated AC measurement voltage prevents fluid electrolysis. Galvanic isolation offers high immunity to interference. Wide electrode lead length capacity supports up to 3000 meters.
Adjustable response and fallback delays from 0.2 to 20 seconds. Programmable for operating or rest current principles. LED indication for operation and contact position. Output includes 2 changeover relay contacts rated for 4A.
This relay is widely used in industrial, water treatment, HVAC, and manufacturing environments for monitoring and controlling liquid levels in tanks and vessels. Its robust design and reliable performance meet IEC and CE standards and is manufactured in Germany. The compact dimensions and DIN rail mount make installation efficient and space-saving.
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Frequently Asked Questions
The input voltage for this model is 24V DC.
The relay output has a current rating of 4A.
The maximum operating temperature is 60°C, while the minimum operating temperature is -20°C.
The response and fallback delays are adjustable from 0.2 seconds to 20 seconds, separately for minimum and maximum level detection.
It has a wide setting range from 2 kΩ to 450 kΩ, which enables differentiation between liquid and foam states.
This unit is designed for DIN rail mounting.
The maximum lead length to the electrodes is 3000 meters.
The relay includes 3 electrode connections, supporting both 2-point and 1-point level control methods.
It meets IEC and CE standards.
The overall width of this model is 22.5 mm.
The output type is relay, with 2 changeover contacts.
The probe voltage used is 10V AC.
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