Wholesale TDS and Conductivity Meter Suppliers & Factory

Electrolytic conductivity represents the quantitative measure of an aqueous solution's ability to conduct an electric current, governed by Kohlrausch's law of independent migration of ions. Expressed in Siemens per meter (S/m) or microsiemens per centimeter (μS/cm), the measured conductance (G) is inversely proportional to resistance (R) and intrinsically linked to the physical geometry of the sensing cell through the cell constant K (cm⁻¹):

TDS quantifies the aggregate mass of mobile dissolved ionic minerals, salts, and micro-contaminants per unit volume (mg/L or ppm). Because an industrial sensor measures ionic mobility rather than physical mass, an empirical conversion factor (k-factor) is applied:

Ionic mobility increases with thermal kinetic energy, causing aqueous conductivity to rise typically by 1.5% to 3.0% per degree Celsius. To standardize reporting to 25°C, high-grade analytical meters execute real-time automated temperature compensation (ATC):

Spanning 4,632 square meters across our Kangqiao and Lingang Shanghai campuses, BOQU operates dedicated cleanrooms, computerized glass annealing furnaces, and advanced CNC machining centers yielding an annual volume exceeding 100,000 analytical instruments.

We established China's first high-temperature water quality sensor proving facility. Here, steam autoclaves, pressure cycling tanks (up to 1.6 MPa), and continuous dynamic thermal testing rigs rigorously stress every sensor up to 130℃ to prevent field drift.

Unlike commercial meter repackagers, every industrial transmitter, circuit board, and digital RS485 communication module undergoes 48 hours of thermal cycling and stress testing before receiving final metrological verification against NIST standard solutions.

Thermal power utilities enforce strict specific, cation, and degassed cation conductivity limits (<0.1 μS/cm at 25°C) to prevent boiler tube pitting and turbine blade stress corrosion cracking. BOQU's K=0.01 cm⁻¹ electropolished cells with specialized cation resin exchanger columns detect trace sodium chloride and sulfate ingress instantly.

In high-capacity brackish and seawater RO desalination plants, differential conductivity measurement across the membrane barrier is essential for real-time Salt Rejection (%) calculations. BOQU dual-channel meters track raw feed TDS alongside permeate conductivities, alarming on membrane rupture or chemical anti-scalant overdosing.

Controlled-Environment Agriculture (CEA) demands strict electrical conductivity (EC) control between 1.2 mS/cm and 2.8 mS/cm. Inadequate EC triggers nutrient starvation, while excessive salinity induces root burn and osmotic stress. BOQU's graphite-electrode sensors continuously actuate peristaltic A/B nutrient dosing pumps via programmable PID relays.

Microelectronic manufacturing requires continuous monitoring of water purity approaching the theoretical physical limit (0.055 μS/cm / 18.2 MΩ·cm resistivity at 25°C). BOQU's flow-through Titanium coaxial sensors eliminate ambient carbon dioxide absorption contamination during measurement.

Processing dairies and beverage bottling lines deploy BOQU toroidal inductive sensors inside CIP return headers to monitor real-time caustic soda (NaOH) and nitric acid (HNO₃) concentration cuts, eliminating manual titration and significantly reducing chemical rinse water waste.

Textile dying, chemical parks, and metallurgical refineries operating ZLD evaporators rely on heavy-duty 4-electrode conductivity sensors to track brine concentrator stages up to 200,000 μS/cm, enabling environmental compliance reporting for municipal environmental authority telemetry.