- Conductivity – a new approach
- IO-Link benefits
IO-Link benefits
With IO-Link, the LDL family of products can provide:
- Conductivity and temperature value over a single wire
- High measurement resolution without scaling
- On-the-fly recipe changes and device adjustment
- Current device status
- Operating hours histogram
- Internal memory for min and max conductivity / temperature
- Automatic device replacement
Using IO-Link, the resolution of the conductivity value is the same throughout the measuring range. This is especially important when using the inductive (toroidal) version. A typical CIP process uses chemicals with high conductivity and rinse water with low conductivity. When using an analog output, the signal is spread out over a greater range, reducing the ability to detect small changes in conductivity. This can lead to residual amounts of chemicals going undetected in rinse water or products.
Measuring range (µS/cm) |
PLC analog input card (12 bit) |
IO-Link * |
---|---|---|
0...500 | 1 µS/cm | 1 µS/cm |
0...5,000 | 2 µS/cm | |
0...15,000 | 4 µS/cm | |
0...100,000 | 25 µS/cm | |
0...500,000 | 122 µS/cm | |
0...1,000,000 | 244 µS/cm |
* LDL100 measuring range is limited to 15,000 µS/cm
The LDL conductivity sensor uses internal memory for edge processing of operating hours at temperature in the form of a histogram. This data provides a temperature profile over the life of the sensor in operation, and this “life history” conductivity sensor technology can be a key tool in managing maintenance and quality assurance.