Bright LED Display
Clear 7-segment digital display for excellent visibility in industrial control panels.
Other
Digital Flow Indicator
FDI Series
High Accuracy Digital Flow Measurement & Indication
The Digital Flow Indicator – FDI Series is a microprocessor-based process indicator designed for accurate flow measurement and indication. It accepts a 4–20 mA DC analog current input from compatible flow transmitters and displays the process value on a bright LED 7-segment display. With programmable scaling and RS485 Modbus RTU communication, the FDI Series can be integrated into PLC, SCADA and industrial automation systems.
4–20 mA DC
Flow Input
±0.1% F.S.
Accuracy
LED 7-Segment
Digital Display
RS485 / Modbus
Communication
Product Overview
Clear, Accurate Flow Indication for Industrial Processes
The FlowDo FDI Series Digital Flow Indicator provides clear and accurate visualization of flow measurements received from compatible flow transmitters.
Designed around a microprocessor-based architecture, the indicator accepts a standard 4–20 mA DC analog current input and converts the transmitter signal into an easy-to-read engineering value on its bright LED display.
Programmable input scaling and decimal-point configuration allow the displayed value to be adapted to the required flow process range. RS485 communication with Modbus RTU protocol enables integration with PLC, SCADA and other industrial automation systems.
The standard FDI-96 configuration uses a 96 × 96 mm panel-mount format, with additional panel sizes available as optional configurations.
Verified catalogue data
Technical Specifications
All specification values are sourced from the FlowDo FDI Series product catalogue.
Product Name
Digital Flow Indicator
Model / Series
FDI Series / FDI-96
Display Type
LED 7-Segment Digital Display (Red LED)
Display Digits
4 Digit (Standard) / 5 Digit (Optional)
Display Height
0.56 in (14.2 mm)
Input Signal
4–20 mA DC (Analog Current Input)
Input Impedance
250 Ω
Input Accuracy
±0.1% of Full Scale
Input Scaling
Programmable as per application flow range
Communication Output
RS485 (Modbus RTU Protocol)
Baud Rate
9600 / 19200 / 38400 / 57600 bps
Standard Power Supply
230 VAC, 50/60 Hz
Optional Power Supply
24 VDC
Power Consumption
< 5 VA
Mounting
Panel Mount
Front Panel Size
96 × 96 mm (Standard) | 72 × 72 mm, 96 × 48 mm, 48 × 48 mm (Optional)
Panel Cutout
92 × 92 mm (+0.5 / -0)
Overall Depth
90 mm (Bezel 10 mm + Body 80 mm)
Enclosure Material
ABS (UL94 V-0) / Metal Body (Optional)
Front Panel Protection
IP54
Operating Temperature
0°C to 55°C
Storage Temperature
-20°C to 70°C
Relative Humidity
≤ 95% RH (Non-Condensing)
Approximate Weight
350 g
Product design
Key Features
Universal 4–20 mA Input
Accepts 4–20 mA analog input with 250 Ω impedance from compatible flow transmitters.
Programmable Scaling
Configurable engineering scaling to match application-specific flow ranges.
High Accuracy & Stability
±0.1% FS accuracy for reliable continuous flow process indication.
RS485 & Modbus RTU
Standard industrial communication for integration with plant automation systems.
Panel-Mount Design
Standard 96 × 96 mm panel-mount enclosure with IP54 front panel protection.
Industries and processes
Applications
Water Flow Measurement
Digital indication of flow values from compatible transmitters in water distribution systems.
Electromagnetic Flow Meters
External process indication when paired with compatible electromagnetic flow transmitters.
Water Treatment Plants
Centralized flow monitoring across inlet, treatment and discharge process lines.
Chemical & Process Plants
Local and remote flow indication in demanding chemical and industrial installations.
STP / ETP Plants
Flow monitoring across sewage, effluent treatment and discharge monitoring pipelines.
Pump Monitoring Systems
Operator visibility of flow information associated with industrial pumping systems.
Ecosystem
Compatible FlowDo Instruments
Explore related FlowDo instruments that pair with the Digital Flow Indicator.
Electromagnetic Flow Meter
Full-bore electromagnetic flow meter with 4–20 mA output compatible with the FDI Series.
View details & specs →
Digital Flow Meter
Integrated flow meter with built-in display and transmitter output for process lines.
View flow meters →
Digital Process Indicator
Versatile multi-parameter process indicator for flow, level, pressure and process variables.
View details & specs →Frequently Asked Questions
Digital Flow Indicator FAQs
Common technical questions regarding panel-mounted flow display and totalization.
What is the FDI Series Digital Flow Indicator?
A panel-mounted digital instrument designed to display instantaneous flow rates and totalized volume from compatible flow meters.
What input signals does it accept?
Standard 4–20 mA analog current loops, frequency/pulse inputs from turbine, vortex, or electromagnetic flow meters.
Can it provide relay alarm outputs for batch control?
Yes, configurable high/low alarm relays and batch totalizer control outputs are available.
Does it support SCADA and RS485 communication?
Yes, isolated RS485 Modbus RTU is available for central monitoring and plant data acquisition.
What display technology is used?
Bright 7-segment LED display with high visibility across industrial control panels.
Is the scaling programmable on-site?
Yes, flow rate units, decimal points, and span scaling are easily configured via front panel keys.
Technical selection
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