SI / DX / DF Tank Weighing Scales and Systems

The Essae SI-850/DX/DF is a series of industrial weighing systems, and while most search results refer to standard platform and bench scales, the same intelligent indicator (SI-850) is also configured for tank and vessel weighing applications. This versatile system is known for its high precision, multiple connectivity options, and automated functions.
Core technical specifications
- Processor and conversion: The heart of the SI-850 indicator is a powerful 32-bit ARM processor paired with a high-resolution 24-bit delta-sigma Analog-to-Digital Converter (ADC). This ensures rapid, stable, and highly accurate weight readings.
- Resolution: It offers a high internal resolution of up to 1/600,000, with a selectable display resolution up to 1/30,000.
- Weight sensors (load cells): For tank weighing, the SI/DX/DF is integrated with multiple load cells and specialized mounting kits designed to support heavy and bulky vessels. These load cells are often tool-steel with an IP67 rating, making them dust-tight and resistant to water, suitable for harsh industrial environments.
- Construction: The system is built for industrial applications, frequently featuring rugged platforms and durable frameworks made of stainless steel (SS-304) or mild steel (MS), depending on the requirements.
- Software and memory:
- The system's intelligence comes from its powerful software. It includes: 4 MB of flash memory, expandable to 8 MB, capable of storing up to 25,000 transaction records.
- Automatic or manual weight logging.
- Programmable printing formats for reports and individual transactions.
- Support for optional 21-CFR compliant software for regulated industries like pharmaceuticals.
Applications and features for tank weighing
When configured for tank and vessel weighing, the SI-850 system provides a comprehensive solution for managing bulk materials.
Common applications
- Batching and formulation: Precise measurement and control of ingredients being added to or dispensed from a tank, crucial for mixing recipes or chemical formulations.
- Filling: Automated control of filling processes, using relay outputs to start and stop the flow of material once a pre-set weight is reached.
- Inventory management: : Tracking the level of bulk materials in tanks, silos, and hoppers to monitor stock levels in real-time.
- Process control: : Integration with other systems via its extensive communication interfaces to automate industrial processes.
Operational features
- Multi-level password protection: Provides secure access control to prevent unauthorized use or modification of settings.
- Tare functions: Offers flexible taring options, including manual, programmable, and automatic tare, to deduct the weight of the vessel.
- onfigurable stability filters: Allows operators to adjust filter settings to optimize performance in environments with vibration or air currents.
- Self-diagnostic function: Continuously monitors system health to simplify troubleshooting and minimize downtime.
Connectivity and integration
The SI-850 excels at seamless integration into automated industrial environments.
Standard interfaces
- RS-232 serial: Two ports are available for connecting to peripheral devices like printers and personal computers.
- USB ports: Includes two USB host ports for connecting a keyboard, barcode scanner, or flash drive for data transfer. It also has one USB device port for direct PC communication.
- Relay outputs: Three potential-free set-point relay outputs (12V/1.5A) can control external equipment for simple automation tasks.
Optional interfaces
- Ethernet (TCP/IP): Provides seamless network integration for data sharing and remote monitoring.
- Wi-Fi: A wireless option for network connectivity with a range of up to 20 meters.
- 4-20 mA output: An industry-standard analog signal for integration with Programmable Logic Controllers (PLCs).
- PC application software: Windows-based software provides enhanced data management, configuration, and control capabilities via a connected computer.
Technical Specifications:

