DOL 45 Capacitive Relay Sensor

DOL 45 is a robust capacitive relay sensor designed for general detection of feed, grain, and solid materials.

The sensor provides great functionality and is easy to operate.


  • Highly reliable
  • Several mounting options
  • Robust design for harsh environments
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Easy Mounting
Better FCR
Compatible With All Types of Controllers
Increased Production
Save Energy
Short Circuit Protection
Accurate Measurements
Save Money
Better Animal Welfare
Withstands High Pressure Cleaning
Well-suited for Livestock Facilities
Low Maintenance
Well Tested
Long Lifetime
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DOL 45 Sensor Designed for General Detection of Feed, Grain, and Solid Materials

A capacitive sensor is typically used as empty, full, and level indicator in tanks, silos, and containers. The powerful integrated relay means that DOL 45 can control many functions directly. The DOL 45 sensor has LEDs that indicate when the switches are activated. All settings can easily be changed at any time.

Increased Usability

The sensor is equipped with a range of special functions, which increase its usability:

  • Reset of sensor to factory setting
  • Reading of adjusted time delay
  • Disconnection of time delay
  • Turn the light on/off in diodes

The DOL 45 features a built-in powerful 10 A relay with switch function. The sensor is available in two variants with the following voltage range: 10 – 30 V AC/DC 90 – 250 V AC

Highly Reliable Sensor

The use of electronic rather than mechanic switches ensures a unique reliability, particularly as the electronics are completely encapsulated in special plastic. This provides maximum protection against humidity and other external influences in harsh environments.

The sensor is CE and C-UL approved and has a high immunity to noise from electric communication (i.e. from a mobile phone) and transients (i.e. from motors and contactors). This makes the sensors very reliable.

Several Mounting Options

The DOL 45 is easily mounted in a plastic gland, which is also available as a flange solution for easy external mounting. Likewise, the sensor is supplied with thread.  Providing several mounting options.

Part of the DOL 40 Series

DOL 45 is part of the DOL 40 series which is a series of robust capacitive/proximity sensors designed for general detection of feed, grain, and solid materials.

The DOL 40 series provides great functionality and is easy to operate. The series includes three models with different functions: DOL 41, DOL 43, and DOL 45.

By means of a new microcomputer technique all functions have been put together in one sensor – the DOL 45.

Apart from the two other options (DOL 41 and DOL 43) the DOL 45 can also be set for delayed switch-on. The time delay will start when the sensor is activated. The relay, switches when the time delay expires. The relay will not switch back until the activation stops.

A Special Sensor for Pipe Conveyor

DOL 45 comes in a DOL 45R-T version. This model is specially developed for detection of feed supply in pipe conveyors, i.e. dry feeding systems and controlling feed transport systems. The setting of sensitivity is more accurate, and the factory preset is 15 sec. delayed switch-on. The time delay starts when the sensor is influenced. When the delay expires, the relay switches. It does not switch back again when the influence stops.

Read more about dol-sensors’ capacitive/proximity sensors here