Overview
The OPTIWAVE 1540 is a 2-wire 80 GHz radar (FMCW) level transmitter for liquid chemicals, water or wastewater applications with high accuracy requirements as well as solids. Its front-flush Lens antenna and compact PVDF housing is resistant to many chemical products allowing for reliable level measurement in open tanks, pressurised tanks at moderate pressure conditions of up to 5 bar / 72.5 psi as well as granular silos. As the FMCW radar is also able to measure through the roof of closed tanks and containers made of non-conductive materials, the OPTIWAVE 1540 is also the perfect fit for cost-effective level measurement of liquids in moveable plastic containers such as IBC – without the need for direct installation in the tank and regular dismounting.
Thanks to its extremely high dynamic range, the OPTIWAVE 1540 is able to deliver reliable readings in the event of condensation or moving surfaces. The combination of high accuracy, robustness and waterproof design (IP68) makes this level transmitter also suitable for many water and wastewater applications. The KROHNE device can thus be adopted as a cost-effective flow transmitter in applications with open channels to determine the flow rate based on the level and the geometry of the Venturi section. In addition, it can be the ideal choice for reliable level measurement of CSOs (Combined Sewer Overflows), canals and rivers, e.g. as part of a flood warning system.
The OPTIWAVE 1540 utilises the device diagnostics of the OPTICHECK technology built-in. This enables continuous self-checking of the device status. In addition, on-site verification and monitoring of configuration and measured values can be carried out via Bluetooth® in combination with the KROHNE OPTICHECK Level Mobile app. There is no need to interrupt the process, climb tanks and other structures or work in confined installation situations. This simplifies operation and maintenance and contributes to increased occupational safety.
Product features and options depend on device configuration: Contact us to make sure that your preferred functionality can be combined in one device.
- Economical and compact level solution for applications with high accuracy requirements (±2 mm / ±0.08 in)
- Highly flexible: can be easily adapted to different applications by way of another quick device set-up
- Robust PVDF housing (IP68): Level transmitter withstands heavy rainfall and flooding events for several days
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PVDF Lens antenna in DN40 / 1½''
- Virtually no dead zone
- Small beam angle of 8° for reliable level measurement in narrow tanks and channels
- Antenna material is chemically resistant to a wide range of products
- Totalizer functionality for volume and flow rate monitoring, e.g. for open channel applications
- Extremely high dynamics for reliable level measurement also in the event of condensation or agitated surfaces
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TBM (Tank Bottom Management) ensures reliable measurement even in empty tanks
- Dedicated algorithms to filter and compensate for irregular radar wave reflections that occur at tank bottom when the vessel is empty
- Allows for quick and easy commissioning of tanks regardless of their size, material or geometry
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User-friendly device installation and set-up, easy commissioning possible without prior knowledge
- Via Bluetooth® in combination with mobile phone or tablet and the OPTICHECK Level Mobile app
- Via HART® using the OPTICHECK DTM with quick set-up assistant
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Features OPTICHECK technology built-in
- Enhanced device diagnostics
- On-site verification without process interruption using the OPTICHECK service tools
- Verification report about device status with one click
- Drift-free and maintenance-free, no need for recalibration
- Delivered with a 5 m / 16.4 ft shielded cable
- Large choice of accessories available - from orientation kits to brackets and low pressure flanges to weather protections and purging kits
- 3-year warranty
Specifications
Depending on selected device configuration
General information
| Product type | Level transmitter |
| Product family name | OPTIWAVE |
| Product positioning | For liquid chemicals and open channel applications |
| Product variants |
OPTIWAVE 1540 - IP68 rated, without display |
| Measurement variables | Distance, Flow rate, Level, Reflection, Volume |
| Measurement principle | Radar (FMCW) |
| Level measurement type | Continuous measurement |
| Contact to measured medium | No |
| Interface measurement | No |
| Redundancy | No |
| Measured media | Liquids, Slurries |
| Measuring range (liquids) |
0…15 m/ 49.2 ft |
| Ambient temperature |
-25…+80°C/ -13…+176°F |
| Measuring point | Pressurised tank, Open tank, Mobile plastic tank (IBC), Open basin, Open channel, River |
Operating conditions
| Process pressure |
-1...5 bar/ |
| Process temperature |
-25...+80°C/ -13…+176°F |
Materials
| Antenna | Polyvinylidene fluoride (PVDF) |
| Gaskets | Fluoroelastomer rubber (FKM/FPM) |
| Wetted parts | Polyvinylidene fluoride (PVDF), Fluoroelastomer rubber (FKM/FPM) |
Process connections
| Thread connections |
Male: |
Communication
| Analogue outputs | 4…20 mA |
| Digital outputs | HART®, Bluetooth |
Accuracy
| Accuracy (liquids) |
Max. measuring error:
Repeatability: |
VN 2685 
US 2142 
SG 612 
MY 459 
GB 382 
HK 334 
CA 299 
AU 286 
