FourFaith IoT
Measures TDS values in water using the electrode method; simultaneously outputs real-time water temperature; automatic temperature compensation; customisable TDS conversion factors; two-point calibration using air zero and standard solution slope; Modbus read/write of TDS and temperature measurement data; modification of device communication address and switching of communication baud rate; supports one-click restoration of factory settings for all device parameters.
Cable length can be customised to suit requirements; no other built-in expansion modules.
The F-IWQ1508 Total Dissolved Solids (TDS) analyser uses the electrode method to measure the total dissolved solids content in water. It features a built-in Pt100 temperature compensation unit, offers a choice of high and low measurement ranges, supports customisable TDS conversion factors, and provides a standard RS485 Modbus digital output;The inductive electrodes are resistant to minor scratches and require minimal routine maintenance. With a standardised two-point calibration procedure, the device is suitable for long-term online monitoring of a wide range of water types, reducing the need for frequent electrode cleaning and on-site calibration.
Inductive electrode design; minor scaling or slight scratches do not affect measurements, ensuring simple daily maintenance;Dual-range specifications cover everything from fresh water to high-salinity wastewater, suitable for monitoring water bodies with varying salinity concentrations;Corrosion-resistant POM monobloc housing with IP68 fully sealed protection; withstands pressures up to 0.6 MPa and is suitable for long-term submersion;3/4 NPT standard thread, supporting various installation methods including submerged, side-wall, piped and flow-through installations, with an installation angle of ≥15°;Standard Modbus RTU bus, enabling direct connection to PLCs, industrial PCs and remote monitoring terminals worldwide;Low-power 0.2 W design, suitable for off-grid, solar-powered water quality monitoring stations in the field;Fast response time, T90 < 10 seconds, enabling rapid detection of changes in water salinity;Supports customisable TDS conversion factors to match the conversion standards for different water types, including fresh water, seawater and industrial effluent.
| Measurement parameters | Water TDS, water temperature | TDS dual ranges | 0–3,000 mg/L / 0–20,000 mg/L |
|---|---|---|---|
| TDS resolution | 1 mg/L; detection limit: 1 mg/L (low range), 10 mg/L (high range) | Measurement accuracy | ±1.5% of reading; temperature measurement accuracy: ±0.3 °C |
| Temperature range | 0–60 °C, resolution 0.1 °C | Response time (T90) | <10 s |
| Calibration method | air zero point + two-point calibration with standard solutions | Interface type | 4-core shielded twisted-pair M16 waterproof aviation connector |
| Communication | RS485 Modbus RTU, default 9600 8N1, baud rate adjustable | Power supply and power consumption | DC 12–24 V, total power consumption 0.2 W @ 12 V |
| Protection rating | IP68, maximum operating pressure 0.6 MPa | Operating environment | Water temperature 0–60 °C; storage -5–65 °C |
Online salinity monitoring for drinking water networks, aquaculture, surface water, wastewater treatment and industrial recirculating water
A Zero calibration: Rinse with distilled water, wipe dry, and allow to stabilise in air for 3 minutes before proceeding; Slope calibration: Place the probe in a standard solution ranging from 20% to full scale, ensuring the probe is at least 2 cm away from the bottom and walls of the container; complete the calibration once the reading has stabilised.
A Modify the TDS conversion factor via Modbus registers (factory default: 0.64) to customise parameters according to the salinity characteristics of freshwater, seawater or wastewater.
A Simply rinse with distilled water using a soft-bristled brush; for inductive electrodes, gently wipe away any scale deposits, taking care to avoid piercing the casing with hard objects. Minor scratches do not affect measurement accuracy.
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