Overview of capacitive sensors
Overview of capacitive sensors

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Manufacturer: Dol-sensors

Overview of capacitive sensors

DOL capacitive sensors can be perfectly tailored to your individual needs by choosing from a wide range of models. We offer sensors in flat and cylindrical designs, power supplies from 24V to 230V, and with relay and transistor outputs.
Capacitive sensors are used to detect the presence or level of various bulk materials, such as powders, grains, dust, cement, sawdust, wood, etc. Many models are available with adjustable sensitivity and additional certifications, such as Atex. The components are made of high-quality materials, and the entire sensors are designed to be dust- and waterproof.

DOL-20R Series Capacitive Sensors

Flat-type sensors. The output is a potential-free contact. Models are available with fixed sensitivity or with adjustable sensitivity using a potentiometer. This is a particularly interesting solution, allowing the sensor to be mounted outside a plastic housing or tank and the sensitivity to respond to the presence of material inside.


Symbol Delay Output Tension Model
103266 shutdown 0-600 sec. Relay 90-250V AC DOL 20R
103265 switching on 0-600 sec. Relay 90-250V AC DOL 20RR
103271 shutdown 0-600 sec. SCR 20-280V AC/DC DOL 20SCR

DOL-25 series capacitive sensors with 18mm and 30mm diameters

Standard capacitive sensors that meet basic physical, electrical, and functional requirements. This series is available in several variants with trimmers. Typically, one trimmer is responsible for adjusting the sensor's sensitivity, and the other for the turn-off delay. Please check your model's specifications!

90-250V AC P-M30
Symbol Delay Output Dimension Tension Model
102139 - SCR NC P-M18 DOL 25 0T
102134 - SCR NO P-M18 20-250V AC DOL 25 1T
102230 - SCR NO P-M30 20-250V AC DOL 25 1T
102042 - SCR NC P-Ø18 90-250V AC DOL 25 1T
102234 - SCR NC P-M30 90-250V AC DOL 25 1T
102041 0-10m shutdowns SCR NC P-Ø18 90-250V AC DOL 25 2T
102233 0-10m shutdowns SCR NC 90-250V AC DOL 25 2T

DOL-26 series capacitive sensors with diameters of 18mm and 30mm

The new DOL26 series of capacitive sensors is resistant to EMI interference, short circuits, and overloads. This reduces damage caused by incorrect sensor connection.

DOL 26 2T
Symbol Delay Output Tension Model
105111 Permanent exclusions 60 sec. SCR 20-280 VAC/DC DOL 26 0T
105101 Shutdowns 0-60 sec. SCR 20-280 VAC/DC DOL 26 2T
105102 Shutdowns 0-60 sec. PNP 10-36 VDC DOL 26 2T
105103 Shutdowns 0-60 sec. NPN 10-36 VDC DOL 26 2T
105104 Shutdowns 0-600 sec. SCR 20-280 VAC/DC DOL 26 2T
105105 Activations 0-600 sec. SCR 20-280 VAC/DC
105106 Shutdowns 0-600 sec. SCR 20-280 VAC/DC DOL 26 2T
105107 Shutdowns 0-60 sec. SCR 20-280 VAC/DC DOL 26 2T
105108 Shutdowns 0-600 sec. SCR 20-280 VAC/DC DOL 26 2T
105109 Activations 0-600 sec. SCR 20-280 VAC/DC DOL 26 2T
105110 Shutdowns 0-600 sec. SCR 20-280 VAC/DC DOL 26 2T
105112 Shutdowns 0-600 sec. PNP 10-36 VDC DOL 26 2T
105113 Exclusions 0-600 sec NPN 10-36 VDC DOL 26 2T
105114 Shutdowns 5-60 sec. SCR 20–280 VAC/DC DOL 26 2T
105115 Shutdowns 5-60 sec. SCR 20–280 VAC/DC DOL 26 2T

DOL-40R series capacitive sensors, 30mm diameter

The DOL 40R series of capacitive sensors is designed for the detection of feed, as well as bulk and solid materials.

90-250V AC
Symbol Delay Output Execution Voltage Model
100672 - Relay Smooth 10-30V AC/DC DOL 41R
100671 - Relay Smooth 90-250V AC DOL 41R
100772 - Relay Threaded 10-30V AC/DC DOL 41R
100771 - Relay Threaded DOL 41R
100662 Shutdown 0-4g. Relay Smooth 10-30V AC/DC DOL 43R
100661 Shutdown 0-4g. Relay Smooth 90-250V AC DOL 43R
100762 Shutdown 0-4g. Relay Threaded 10-30V AC/DC DOL 43R
100761 Shutdown 0-4g. Relay Threaded 90-250V AC DOL 43R
100652 Off/On 0-4g. Relay Smooth 10-30V AC/DC DOL 45R
100651 Off/On 0-4g. Relay Smooth 90-250V AC DOL 45R
100752 Off/On 0-4g. Relay Threaded 10-30V AC/DC DOL 45R
100751 Off/On 0-4g. Relay Threaded 90-250V AC DOL 45R

DOL-45R-T Series Capacitive Sensors

Designed to detect bulk materials directly inside conveying system pipes.

Symbol Delay Output Execution Voltage Model
100682 Off/On 0-4g. Relay Smooth 10-30V AC/DC DOL 45R-T
100681 Off/On 0-4g. Relay Smooth 90-250V AC DOL 45R-T

DOL-44 series capacitive sensors

Symbol Delay Output Version Voltage Model
DOL 44R Trip 0-600 sec. Relay Smooth 10-30V AC/DC 100609
DOL 44R Shutdown 0-600 sec. Relay Smooth 90-265V AC 100610
DOL 44RG Shutdown 0-600 sec. Relay Threaded 10-30V AC/DC 100607
DOL 44RG Shutdown 0-600 sec. Relay Threaded 90-265V AC 100608
DOL 44R-33 Shutdown 0-60 sec. Relay Smooth/Taper 10-30V AC 100309
DOL 44R-33 Trips 0-3600 sec. Relay Smooth/Tapered 90-265V AC 100302
DOL 44R-33 Trips 0-60 sec. Relay Smooth/Tapered 90-265V AC 100300
DOL 44R-33 Switching 0-600 sec Relay Smooth/Tapered 90-265V AC 100301
DOL 44R-33 Switching on 0-600 sec Relay Smooth/Taper 10-30V AC 100310
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DOL capacitive sensors can be perfectly tailored to your individual needs by choosing from a wide range of models. We offer sensors in flat and cylindrical designs, power supplies from 24V to 230V, and with relay and transistor outputs.
Capacitive sensors are used to detect the presence or level of various bulk materials, such as powders, grains, dust, cement, sawdust, wood, etc. Many models are available with adjustable sensitivity and additional certifications, such as Atex. The components are made of high-quality materials, and the entire sensors are designed to be dust- and waterproof.

DOL-20R Series Capacitive Sensors

Flat-type sensors. The output is a potential-free contact. Models are available with fixed sensitivity or with adjustable sensitivity using a potentiometer. This is a particularly interesting solution, allowing the sensor to be mounted outside a plastic housing or tank and the sensitivity to respond to the presence of material inside.


Symbol Delay Output Tension Model
103266 shutdown 0-600 sec. Relay 90-250V AC DOL 20R
103265 switching on 0-600 sec. Relay 90-250V AC DOL 20RR
103271 shutdown 0-600 sec. SCR 20-280V AC/DC DOL 20SCR

DOL-25 series capacitive sensors with 18mm and 30mm diameters

Standard capacitive sensors that meet basic physical, electrical, and functional requirements. This series is available in several variants with trimmers. Typically, one trimmer is responsible for adjusting the sensor's sensitivity, and the other for the turn-off delay. Please check your model's specifications!

90-250V AC P-M30
Symbol Delay Output Dimension Tension Model
102139 - SCR NC P-M18 DOL 25 0T
102134 - SCR NO P-M18 20-250V AC DOL 25 1T
102230 - SCR NO P-M30 20-250V AC DOL 25 1T
102042 - SCR NC P-Ø18 90-250V AC DOL 25 1T
102234 - SCR NC P-M30 90-250V AC DOL 25 1T
102041 0-10m shutdowns SCR NC P-Ø18 90-250V AC DOL 25 2T
102233 0-10m shutdowns SCR NC 90-250V AC DOL 25 2T

DOL-26 series capacitive sensors with diameters of 18mm and 30mm

The new DOL26 series of capacitive sensors is resistant to EMI interference, short circuits, and overloads. This reduces damage caused by incorrect sensor connection.

DOL 26 2T
Symbol Delay Output Tension Model
105111 Permanent exclusions 60 sec. SCR 20-280 VAC/DC DOL 26 0T
105101 Shutdowns 0-60 sec. SCR 20-280 VAC/DC DOL 26 2T
105102 Shutdowns 0-60 sec. PNP 10-36 VDC DOL 26 2T
105103 Shutdowns 0-60 sec. NPN 10-36 VDC DOL 26 2T
105104 Shutdowns 0-600 sec. SCR 20-280 VAC/DC DOL 26 2T
105105 Activations 0-600 sec. SCR 20-280 VAC/DC
105106 Shutdowns 0-600 sec. SCR 20-280 VAC/DC DOL 26 2T
105107 Shutdowns 0-60 sec. SCR 20-280 VAC/DC DOL 26 2T
105108 Shutdowns 0-600 sec. SCR 20-280 VAC/DC DOL 26 2T
105109 Activations 0-600 sec. SCR 20-280 VAC/DC DOL 26 2T
105110 Shutdowns 0-600 sec. SCR 20-280 VAC/DC DOL 26 2T
105112 Shutdowns 0-600 sec. PNP 10-36 VDC DOL 26 2T
105113 Exclusions 0-600 sec NPN 10-36 VDC DOL 26 2T
105114 Shutdowns 5-60 sec. SCR 20–280 VAC/DC DOL 26 2T
105115 Shutdowns 5-60 sec. SCR 20–280 VAC/DC DOL 26 2T

DOL-40R series capacitive sensors, 30mm diameter

The DOL 40R series of capacitive sensors is designed for the detection of feed, as well as bulk and solid materials.

90-250V AC
Symbol Delay Output Execution Voltage Model
100672 - Relay Smooth 10-30V AC/DC DOL 41R
100671 - Relay Smooth 90-250V AC DOL 41R
100772 - Relay Threaded 10-30V AC/DC DOL 41R
100771 - Relay Threaded DOL 41R
100662 Shutdown 0-4g. Relay Smooth 10-30V AC/DC DOL 43R
100661 Shutdown 0-4g. Relay Smooth 90-250V AC DOL 43R
100762 Shutdown 0-4g. Relay Threaded 10-30V AC/DC DOL 43R
100761 Shutdown 0-4g. Relay Threaded 90-250V AC DOL 43R
100652 Off/On 0-4g. Relay Smooth 10-30V AC/DC DOL 45R
100651 Off/On 0-4g. Relay Smooth 90-250V AC DOL 45R
100752 Off/On 0-4g. Relay Threaded 10-30V AC/DC DOL 45R
100751 Off/On 0-4g. Relay Threaded 90-250V AC DOL 45R

DOL-45R-T Series Capacitive Sensors

Designed to detect bulk materials directly inside conveying system pipes.

Symbol Delay Output Execution Voltage Model
100682 Off/On 0-4g. Relay Smooth 10-30V AC/DC DOL 45R-T
100681 Off/On 0-4g. Relay Smooth 90-250V AC DOL 45R-T

DOL-44 series capacitive sensors

Symbol Delay Output Version Voltage Model
DOL 44R Trip 0-600 sec. Relay Smooth 10-30V AC/DC 100609
DOL 44R Shutdown 0-600 sec. Relay Smooth 90-265V AC 100610
DOL 44RG Shutdown 0-600 sec. Relay Threaded 10-30V AC/DC 100607
DOL 44RG Shutdown 0-600 sec. Relay Threaded 90-265V AC 100608
DOL 44R-33 Shutdown 0-60 sec. Relay Smooth/Taper 10-30V AC 100309
DOL 44R-33 Trips 0-3600 sec. Relay Smooth/Tapered 90-265V AC 100302
DOL 44R-33 Trips 0-60 sec. Relay Smooth/Tapered 90-265V AC 100300
DOL 44R-33 Switching 0-600 sec Relay Smooth/Tapered 90-265V AC 100301
DOL 44R-33 Switching on 0-600 sec Relay Smooth/Taper 10-30V AC 100310
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