China Water Conductivity Transmitter Suppliers & Factory Hub

Selecting the proper cell constant is critical for measurement resolution and accuracy:

• K = 0.01: Recommended for ultra-pure water (UPW), semiconductor rinse, and power station steam/condensate loops (0.001 to 20 µS/cm).
• K = 0.1: Ideal for reverse osmosis permeate, demineralized water, and pharmaceutical purified water (0.1 to 200 µS/cm).
• K = 1.0: The standard workhorse for municipal drinking water, cooling tower blowdown, and general surface water (10 to 2,000 µS/cm).
• K = 10.0 or Toroidal Inductive: Mandatory for wastewater effluent, sea water desalination, and high chemical concentrations (2,000 µS/cm to 2,000 mS/cm).

Contacting sensors place metal electrodes (316L SS, platinum, or titanium) directly into the fluid. While highly sensitive in low-conductivity pure water, they can foul easily in dirty or highly concentrated fluids. Inductive (toroidal) sensors, like our SJG-2083CS, use two sealed wire-wound toroidal coils inside a corrosion-resistant polymer body (PEEK or PVDF). The fluid forms a closed loop coupling the coils. Inductive probes have no metal pins in contact with the sample, making them virtually immune to coating, fouling, and chemical corrosion in concentrated acids or wastewater.

Conductivity is highly dependent on sample temperature; fluid conductivity typically rises 1.5% to 3.0% per degree Celsius due to decreased viscosity and increased ion mobility. Our transmitters incorporate high-precision Pt100 or Pt1000 RTD temperature sensors and allow operators to select between standard linear compensation (%/℃ adjustable from 0.00 to 10.00%) or specialized non-linear matrix compensation for ultra-pure water systems to normalize all measurements accurately back to 25℃ reference conditions.

Yes. Our transmitters offer standard dual isolated 4-20mA analog current loops (representing conductivity and temperature simultaneously), RS-485 interfaces running standard Modbus-RTU protocols, and programmable SPDT relay alarm outputs. They integrate directly with Siemens, Rockwell, ABB, and Schneider PLCs, as well as IoT gateways and SCADA systems without proprietary software.

Because we operate 4,632 m² of manufacturing space across two Shanghai facilities, our standard catalog instruments have an MOQ of just 1 piece for evaluation. Standard lead time for batch orders (10–100 units) is typically 5 to 7 working days. Custom OEM/ODM requests (custom cables, branding, modified firmware) typically take 2 to 3 weeks.