Description
M21 – intelligent pump controller
The IBO M21 controller is an electronic device that automates the operation of a single pump while providing comprehensive protection. The M21 records the pump’s accumulated operating time and the history of its five most recent faults, making it easier to monitor the condition of the installation and diagnose potential problems more quickly. A clear display shows the device status in real time, while calibration for the specific pump ensures precise protection.
Who is it for?
- Installers and plumbers – the M21 controller facilitates diagnostics by recording the fault history and operating-time counter, simplifying servicing.
- Homeowners with their own water source – the controller automates the operation of a submersible or surface pump and protects it against costly failures.
- Farmers and allotment gardeners – the device monitors pump operation during irrigation and tank filling, responding to the water level in the source.
- Users who value control over their installation – monitoring operating time and recent faults makes it possible to detect irregularities in the pumping system at an early stage.
Applications
The M21 controller is suitable wherever a single-phase pump is to operate independently and the user wants visibility into its operation. It works with submersible pumps in domestic wells, surface pumps in household water systems, and immersion pumps in tanks and pumping stations. It receives the start and stop signal from probes, floats, or a pressure switch, allowing it to be adapted to various installation configurations.
The device regulates pump operation depending on the water level in the tank from which it pumps, the level in the target tank, or the pressure in the system, while the recorded history and operating time facilitate ongoing monitoring. As a result, one controller can handle both simple irrigation and more demanding water-supply systems.
M21 controller features
At the heart of the device is an electronic system with an LCD display that shows the pump’s current operating status and diagnostic messages. The M21 uses dual dry-run protection – it simultaneously analyzes the signal from probes or liquid-level sensors and the current consumption of the operating pump. After an emergency shutdown, the controller automatically attempts to restart the pump, with the restart time depending on the type of fault.
Unlike the basic M121 model, the M21 controller also records the pump’s accumulated operating time and the history of the five most recent faults in which the protection functions were activated. This makes it possible to assess the condition of the installation on an ongoing basis and carry out servicing more efficiently. Operation can take place in automatic or manual mode.
- Brand: IBO
- Type: intelligent pump controller
- Power supply: 1~230 V, 50 Hz
- Power range of compatible single-phase pumps: 0.37–2.2 kW
- Protection rating: IP22
- Operating modes: automatic / manual
- Protections: dual dry-run protection, overload, voltage drop and surge, overvoltage, overvoltage surge, short circuit
- Extended functions: pump operating-time counter, history of the last 5 faults, dynamic LCD display
- Operating temperature range: -25°C to +55°C
- Included: 3 measuring probes with a 1 m cable
IBO – 24 months (2 years) manufacturer’s warranty.
Dambat – a trusted manufacturer of pumps and hydrotechnical equipment with quality certificates.
Frequently asked questions (FAQ) – M21 controller
What is the M21 controller used for?
The M21 controller is an intelligent device for automatically controlling and protecting a single pump. It switches the pump on and off depending on the water level or pressure, protects it against dry running and power-supply irregularities, and additionally records operating time and fault history.
Which pumps can be connected to the M21 controller?
The M21 works with single-phase submersible, immersion, and surface pumps rated from 0.37 to 2.2 kW with a 1~230 V power supply. This makes it suitable for deep wells, domestic water systems, and tanks.
How does the M21 controller differ from the M121 model?
The M21 has the same power-supply parameters and the same set of protections as the M121, but it additionally displays the pump’s accumulated operating time, records the history of the five most recent faults, and uses a dynamic LCD display. You can find the full range of controllers in the controllers category.
Does the M21 protect the pump against dry running?
Yes, the controller uses dual dry-run protection – it analyzes the signal from liquid-level probes and the current consumption of the operating pump. When a fault is detected, the pump is switched off and the controller automatically attempts to restart it after a specified period.
Can the M21 controller be installed outdoors?
The M21 has an IP22 protection rating and is designed for indoor installation. In systems with a pump operating outdoors, the controller itself must be placed indoors or in a suitable protected enclosure.
Where can I buy the M21 controller?
As the manufacturer, we do not sell directly. The IBO M21 controller can be purchased from our trade partners, installation wholesalers, and authorized online distributors.
What is the warranty for the M21 controller?
IBO – 24 months (2 years) manufacturer’s warranty.
- Type: Pump controller,
- Number of pumps supported: 1,
- Maximum power: 2.2 kW,
- Power supply: 1 ~ 230 V,
- Frequency: Hz,
- Maximum supported current: A
- Protection rating:
- Maximum liquid temperature: °C
- Dimensions: mm,
- Weight: 1.5 kg.
CONTROLLER UTILITY FUNCTIONS
• Automatic attempt to start the pump after its emergency shutdown by one of the protection functions. For different emergency situations - different self-activation times.
• Possibility to calibrate and change the calibration of the controller to work with a given pump.
• Turning the pump on and off depending on:
o Water level in the tank from which we pump,
o Water level in the tank into which we pump,
o Pressure values in the tank into which we pump,
• Possibility to work in automatic or manual mode.
• Various on/off signal sources: Probes, floats, pressure sensors.
CONTROLLER PROTECTIVE FUNCTIONS
• Double protection against dry running provided by:
o Fluid level probes/sensors,
o Analysis of the current consumption of the operating pump,
• Overload protection,
• Protection against voltage drop,
• Protection against voltage surges,
• Overvoltage protection,
• Short circuit protection.
Additional functions M21
The M21 controller additionally has:
• Function of displaying the accumulated pump operating time,
• Function of displaying the history of the last five failures in which protection functions were activated,
• Dynamic LCD screen displaying the current pump operating status.
Download: M_21_instrukcja_PL-EN-DE.pdf
Download: GARAN_Prawny_obowiazek_zapewnienia_zgodnosci_towaru_z_umowa.pdf
M21 – intelligent pump controller
The IBO M21 controller is an electronic device that automates the operation of a single pump while providing comprehensive protection. The M21 records the pump’s accumulated operating time and the history of its five most recent faults, making it easier to monitor the condition of the installation and diagnose potential problems more quickly. A clear display shows the device status in real time, while calibration for the specific pump ensures precise protection.
Who is it for?
- Installers and plumbers – the M21 controller facilitates diagnostics by recording the fault history and operating-time counter, simplifying servicing.
- Homeowners with their own water source – the controller automates the operation of a submersible or surface pump and protects it against costly failures.
- Farmers and allotment gardeners – the device monitors pump operation during irrigation and tank filling, responding to the water level in the source.
- Users who value control over their installation – monitoring operating time and recent faults makes it possible to detect irregularities in the pumping system at an early stage.
Applications
The M21 controller is suitable wherever a single-phase pump is to operate independently and the user wants visibility into its operation. It works with submersible pumps in domestic wells, surface pumps in household water systems, and immersion pumps in tanks and pumping stations. It receives the start and stop signal from probes, floats, or a pressure switch, allowing it to be adapted to various installation configurations.
The device regulates pump operation depending on the water level in the tank from which it pumps, the level in the target tank, or the pressure in the system, while the recorded history and operating time facilitate ongoing monitoring. As a result, one controller can handle both simple irrigation and more demanding water-supply systems.
M21 controller features
At the heart of the device is an electronic system with an LCD display that shows the pump’s current operating status and diagnostic messages. The M21 uses dual dry-run protection – it simultaneously analyzes the signal from probes or liquid-level sensors and the current consumption of the operating pump. After an emergency shutdown, the controller automatically attempts to restart the pump, with the restart time depending on the type of fault.
Unlike the basic M121 model, the M21 controller also records the pump’s accumulated operating time and the history of the five most recent faults in which the protection functions were activated. This makes it possible to assess the condition of the installation on an ongoing basis and carry out servicing more efficiently. Operation can take place in automatic or manual mode.
- Brand: IBO
- Type: intelligent pump controller
- Power supply: 1~230 V, 50 Hz
- Power range of compatible single-phase pumps: 0.37–2.2 kW
- Protection rating: IP22
- Operating modes: automatic / manual
- Protections: dual dry-run protection, overload, voltage drop and surge, overvoltage, overvoltage surge, short circuit
- Extended functions: pump operating-time counter, history of the last 5 faults, dynamic LCD display
- Operating temperature range: -25°C to +55°C
- Included: 3 measuring probes with a 1 m cable
IBO – 24 months (2 years) manufacturer’s warranty.
Dambat – a trusted manufacturer of pumps and hydrotechnical equipment with quality certificates.
Frequently asked questions (FAQ) – M21 controller
What is the M21 controller used for?
The M21 controller is an intelligent device for automatically controlling and protecting a single pump. It switches the pump on and off depending on the water level or pressure, protects it against dry running and power-supply irregularities, and additionally records operating time and fault history.
Which pumps can be connected to the M21 controller?
The M21 works with single-phase submersible, immersion, and surface pumps rated from 0.37 to 2.2 kW with a 1~230 V power supply. This makes it suitable for deep wells, domestic water systems, and tanks.
How does the M21 controller differ from the M121 model?
The M21 has the same power-supply parameters and the same set of protections as the M121, but it additionally displays the pump’s accumulated operating time, records the history of the five most recent faults, and uses a dynamic LCD display. You can find the full range of controllers in the controllers category.
Does the M21 protect the pump against dry running?
Yes, the controller uses dual dry-run protection – it analyzes the signal from liquid-level probes and the current consumption of the operating pump. When a fault is detected, the pump is switched off and the controller automatically attempts to restart it after a specified period.
Can the M21 controller be installed outdoors?
The M21 has an IP22 protection rating and is designed for indoor installation. In systems with a pump operating outdoors, the controller itself must be placed indoors or in a suitable protected enclosure.
Where can I buy the M21 controller?
As the manufacturer, we do not sell directly. The IBO M21 controller can be purchased from our trade partners, installation wholesalers, and authorized online distributors.
What is the warranty for the M21 controller?
IBO – 24 months (2 years) manufacturer’s warranty.



