DOL 41 Capacitive Relay Sensor
DOL 41 is a reliable capacitive relay sensor designed for general detection of feed, grain and solid materials.
The sensor offers extensive functionality and is easy to operate.
The DOL 41 capacitive sensor has no time delay. The relay switches when the sensor is activated and remains in that position until activation ceases.
Benefits
- Highly reliable
- Multiple mounting options
- Robust design for harsh environments

DOL 41 capacitive sensor for general detection of feed, grain and solid materials
The capacitive sensor is typically used as an empty, full and level indicator in tanks, silos and containers. DOL 41's powerful built-in relay can directly control many functions. DOL 41 LEDs show when its switches are activated. DOL 41 has NO (normally open) and NC (normally closed) outputs. All settings can be easily changed at any time.
Improved usability
The sensor features several special functions that improve usability:
- Reset the sensor to factory settings
- Switch LED indicators on/off
The DOL 41 capacitive sensor has a built-in high-power 5A relay with a changeover function. It is available in two voltage variants: 10–30 V AC/DC or 90–250 V AC
The sensor has no time delay. The relay switches when the sensor is activated and remains in that position until activation ceases.
Sensitivity is easily adjusted with two buttons.
Highly reliable sensor
Electronic rather than mechanical switches provide exceptional reliability, particularly because the electronics are fully enclosed in a special plastic. This gives maximum protection against moisture and other external influences in harsh environments.
The sensor is CE, UL and C-UL certified and highly resistant to interference from electrical communication, such as mobile phones, and transients, such as those from motors and contactors. This makes it highly reliable.
Multiple mounting options
DOL 41 is easily mounted in a plastic gland, also available as a flanged solution for easy external mounting. A threaded version provides further mounting options. DOL 41 can be installed inside a feeder or through an opening in a feeder, hopper or silo using the supplied plastic gland.

DOL 41 smooth housing

DOL 41 threaded housing
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Price-list variants
June 2026 price list · EUR
| Product code | Product | Price, EUR | View in shop |
|---|---|---|---|
| 100672 | DOL 41R Capacitive sensor, 10-30 V AC/D | 100.27 EUR | View in shop → |
| 100671 | DOL 41R Capacitive sensor, 90-250 V AC | 100.27 EUR | View in shop → |
| 100771 | DOL 41R-G Cap. sensor, thread, 90-250 V | 100.94 EUR | View in shop → |
| 100772 | DOL 41R-G Cap. sensor, thread 10-30 V | 100.94 EUR | View in shop → |
Prices from the price list dated 1 June 2026. The manufacturer reserves the right to price adjustments and product alterations.
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