Designed for detecting water or other conductive liquids in the zone where its electrodes are located.
The CLS.D01 switch can be used as a standalone single-channel level switch or can be connected to the digital inputs of controllers (PLCs), programmable relays (PR) and other level monitoring devices. For this purpose, the CLS.D01 has two transistor outputs (PNP and NPN type) operating in parallel.
The operation of the CLS.D01 level switch is based on the conductivity measurement method based on measuring the electrical conductivity of the monitored medium between the common and signal electrodes. The switch detects an infinitely high resistance when the electrodes are in the air, and a specific resistance value when its electrodes are immersed in a conductive liquid. By comparing the measured resistance with the set triggering threshold, an output control signal is generated.
To protect the electrodes from buildup and corrosion, the switch powers them with 2.5 VAC.
To prevent frequent switching on and off of actuators (for example, if there are waves on the liquid surface), the switch features an output on/off delay (≈2.5 s).
The adjustable sensitivity threshold from 10 kkΩ to 500 kkΩ allows the CLS.D01 switch to work with liquid media of various conductivities: water (drinking, tap, spring, rain, sea, well, sewage), low-alcohol liquids (beer, wine, etc.), milk, coffee, liquid fertilizers, alkalis and acids, etc.
Operating media requirements:
| Power supply | |
| Supply voltage | 10…28 VDC |
| Power consumption | max0.4 W |
| Inputs | |
| Number of inputs | 1 |
| Input type | conductive |
| Sensitivity thresholds* | 10, 100, 250, 500 kΩ |
| Electrode voltage | max 2.5 VAC at 25 Hz |
| Electrode current | max 0.02 mA |
| Outputs | |
| Number of channels | 1 |
| Number of outputs | 2 |
| Output type | transistor outputs: 1хPNP (NO) and 1хNPN (NO), open collector |
| Output load current | max 200 mA |
| On/off delay ** | ≈2.5 seconds |
| Operating media | |
| Operating temperature of the monitored liquid | -20 to +100 °C |
| Operating pressure | -1 to 6 bar |
| Ambient operating temperature | -20 to +80 °C |
| Relative humidity | max 90% (without condensation) |
| Housing | |
| Process connection | G3/4″ or M27×1.5 |
| Ingress protection | IP65 (the connector) |
| Number of connected rods | 2 (1 signal + 1 common) |
| Electrode connection to housing | M4 female thread |
| Electrode holder material | stainless steel AISI 304 |
| Insulation material | PTFE (Teflon) |
| Cable cross-section | max 1.5 mm² |
| Terminal head | DIN43650 connector |
* - Sensitivity threshold configuration is performed via DIP switches (factory default is 10 kΩ).
** - On/off delay is not-adjustable.
