A Flow Indicator cum Totalizer (FIT) manufactured by brands like Ishan Instruments is a microcontroller-based industrial process instrument used to measure, display, and accumulate flow of liquids or gases in real time.
It combines two main functions in one device:
The instrument receives an input signal from a flow transmitter such as:
The input is typically:
It processes this signal using a microcontroller to:
A Flow Indicator cum Totalizer (Ishan Brand) is a panel-mounted digital instrument that continuously measures flow, displays it in real time, and accumulates total usage for monitoring, billing, batching, and process control.
| Parameter | Specification |
|---|---|
| Product Type | Digital Flow Indicator Cum Totalizer |
| Function | Displays instantaneous flow rate + totalized flow volume |
| Input Signal | 4–20 mA DC / Pulse / Frequency input (selectable) |
| Compatible Sensors | Magnetic flow meter, turbine flow meter, ultrasonic flow meter, DP flow transmitter |
| Display Type | Dual 7-segment LED or LCD display |
| Display Parameters | Instantaneous flow rate, total flow, batch quantity (optional) |
| Engineering Units | LPH, LPM, m³/hr, m³/day, Kg/hr (configurable) |
| Accuracy | ±0.1% to ±0.5% of full scale (system dependent) |
| Resolution | Programmable (based on scaling factor) |
| Totalizer Range | Up to 8–10 digit accumulation (non-volatile memory supported) |
| Reset Function | Resettable / Non-resettable totalizer (programmable) |
| Power Supply | 230 VAC ±10% / 110 VAC optional / 24 V DC optional |
| Power Consumption | Low power (<5–10 W typical) |
| Signal Isolation | Galvanically isolated input/output (optional in advanced models) |
| Relay Outputs | 1–2 programmable relay outputs (batch control / alarm) |
| Analog Output | 4–20 mA retransmission (optional) |
| Communication | RS-485 Modbus RTU (optional) |
| Programming Interface | Front keypad configuration |
| Display Update Rate | 0.5 – 1 second typical |
| Sampling Time | Real-time continuous processing |
| Enclosure Type | Panel mount (96×96 mm / 144×144 mm standard) |
| Housing Material | ABS / Polycarbonate industrial grade |
| Protection Class | IP65 front panel (typical) |
| Operating Temperature | 0°C to 50°C |
| Storage Temperature | -10°C to 60°C |
| Humidity | Up to 95% RH non-condensing |
| Data Retention | EEPROM / Flash memory (retains totalizer during power failure) |
| Calibration | Field programmable scaling (K-factor / pulse rate / 4–20 mA scaling) |
| Response Time | <1 second typical |
| Mounting Type | Panel mounted / flush mount |
| Alarm Function | High flow / low flow / batch completion alarm |
| Batch Control Feature | Available in advanced models (preset volume control) |
| Applications | Water treatment plants, chemical dosing, oil & gas, irrigation, industrial process flow measurement |
| Parameter | Specification |
|---|---|
| Type | Digital Flow Indicator + Totalizer |
| Input | 4–20 mA / Pulse / Frequency |
| Display | Dual (Flow rate + Total flow) |
| Units | LPM, LPH, m³/hr (programmable) |
| Accuracy | ±0.1% to ±0.5% FS |
| Totalizer | Non-volatile, 8–10 digit |
| Reset | Resettable / Non-resettable |
| Power Supply | 230 VAC / 24 V DC (optional) |
| Output | Relay / 4–20 mA / RS-485 (optional) |
| Mounting | Panel mount (96×96 mm standard) |
| Operating Temp | 0°C to 50°C |
| Memory | EEPROM (power fail retention) |
| Applications | Water, chemical dosing, industrial flow monitoring |
