The Rosemount 1408A is a compact, non-contacting radar transmitter designed for level measurement and open-channel flow calculations. It uses 80 GHz frequency-modulated continuous-wave (FMCW) radar to track the product surface without contacting the measured medium. Its robust stainless steel housing and compact design support outdoor installations and small tanks where installation space is limited.
Key Features
- 80 GHz FMCW radar technology for continuous non-contacting measurement
- Level measurement for liquids and solids
- Open-channel flow calculations using integrated equations or strapping tables
- Smart Echo Supervision™ to distinguish true surface echoes from false reflections
- Compact, robust stainless steel housing with drip-off seal design
- No dead zone, enabling measurement close to the top of the tank
- M12 electrical connector for simplified installation
- 2-wire 4–20 mA HART® or 3-wire 4–20 mA and IO-Link options
- Configurable switch output for abnormal level conditions
- Compatible with the Rosemount 3490 Controller for supported flow and level applications
Suitable Applications
- Water and wastewater treatment
- Open-channel flow measurement
- Small storage tanks and process vessels
- Pumping stations and drainage systems
- Utility and infrastructure monitoring
- Industrial water management
- Liquid and solids level monitoring
- Outdoor level measurement installations
- Overfill and dry-run prevention
Technical Highlights & Selection Considerations
- Measurement application: Confirm whether the requirement is continuous level measurement, open-channel flow calculation or both.
- Radar technology: 80 GHz FMCW radar supports focused surface tracking in compact vessels and challenging installations.
- Measured medium: Confirm whether the application involves liquids or solids and check the manufacturer's suitability guidance.
- Process connection: The G1-inch connection is compatible with a range of modular process connection adapters.
- Output and communication: Choose 4–20 mA HART® or 4–20 mA with IO-Link according to the control system.
- Switch output: Specify whether a configurable level alarm output is required.
- Installation conditions: Check tank geometry, mounting position, obstructions and outdoor exposure.
- Flow measurement: Confirm the channel or flume geometry and required flow calculation method.
- Approvals: Verify applicable environmental and industry-specific approvals for the selected configuration.
Frequently Asked Questions
Q1: What is the Rosemount 1408A used for?
It provides continuous level measurement for liquids and solids and supports open-channel flow calculations, particularly in water, wastewater and utility applications.
Q2: How does the Rosemount 1408A measure level?
It transmits 80 GHz radar signals toward the material surface and calculates the level from the reflected signals without contacting the medium.
Q3: Can the Rosemount 1408A measure open-channel flow?
Yes. It supports flow calculations using integrated equations or strapping tables for compatible open-channel installations.
Q4: Which communication options are available?
The product offers 2-wire 4–20 mA HART® or 3-wire 4–20 mA and IO-Link configurations. Confirm the required output when ordering.
Q5: Is the Rosemount 1408A suitable for outdoor installation?
Yes. Its robust stainless steel housing and drip-off seal design are intended to withstand common outdoor conditions. Check the specified environmental ratings for the selected model.
Q6: What information should I provide when ordering?
Confirm the application, measured medium, required measuring range, process connection, output type, flow calculation requirements, mounting accessories and applicable approvals.
