DOL 33R-21R
The capacitive sensor is an electronically controlled no-touch switch that is activated by most materials as soon as they get close to the upper end of the sensor.
The use of electronic rather than mechanical switches ensures a unique relability, particularly as the electronics are completely enclosed in special plastic which provides maximum protection against moisture and harsh environments.
The sensor can be mounted in a PG36 screwed flange, e.g. in a silo wall or merely hanging down from the top of the silo.
DOL 21R
DOL 21R has no time delay. The relay switches once the sensor is activated and remains in this position until the activating impact stops.
DOL 33R
DOL 33R has delayed switch-off. The relay switches once the sensor is activated. When the activating impact ceases, the time delay starts, and when the delay period expires, the relay will switch back.
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| Supply voltage |
230 V AC + 30-25% |
| Frequency |
45-65 Hz |
| Consumption |
1 VA |
| Relay switch max. voltage |
240 Volt AC |
| Relay switch max. current |
5 A at cos ȹ = 1
2 A at cos ȹ = 0.8
0.35 A at cos = 0.4 |
| Safety |
Relay switches and supply voltage are galvanically separated. Test voltage 4 kV AC. |
| Approvals |
CE and C-UL |
| Distance of activation |
Adjustable 0-15mm depending on material. Factory setting for grain/feed. |
| Time delay |
Adjustable 1-600 sec. Factory setting 30 sec. |
| Protection class |
IP67 |
| Ambient temperature, operation |
-20°C to +75°C |
| Ambient temperature storage |
-30°C to +85°C |
| Length |
133mm |
| Diameter |
Max. 33mm |
| Cable |
Five-core 0.75mm2
Length: 1450mm
Diameter: 8mm |
| Weight incl. cable |
380 g |
| Accessories, supplied |
Adjusting screwdriver (only DOL 33R) |