Conductivity Sensors

A: For ultrapure / EDI / RO water (low conductivity, <20 μS/cm), choose K=0.01 cm⁻¹ conductivity cell. For general pure-water (20-200 μS/cm), select K=0.1 cm⁻¹. K=1.0 and K=10 are for medium-high and high-conductivity liquid, not suitable for ultrapure water.

A: -2-pole: simple structure, low cost, good for low-conductivity pure-water measurement. Limitation: polarization error at high conductivity. - 4-pole: eliminate electrode polarization error, suitable for wide-range & medium-high conductivity liquid. Higher price, not recommended for ultrapure water below 5 μS/cm.

A: Digital conductivity sensors integrate temperature sensor and support automatic temperature compensation (default reference temperature 25 ℃). Analog transmitters also provide ATC function. Temperature compensation coefficient can be adjusted on controller.

A: PVDF / PPS body probe: continuous working temperature up to 85 ℃ is supported. Sanitary 316L hightemperature type can reach 130 ℃ (SIP). Ordinary plasticbody electrodes are limited to 060 ℃, cannot run longterm at 85 ℃.

A: Standard inline conductivity sensor: 0.6 MPa. Highpressure customized version can reach 1.01.6 MPa. Sanitary flowcell type is normally 0.6 MPa.

A: Yes. Digital RS485 conductivity sensor uses standard ModbusRTU protocol, directly compatible with most brands PLC, DCS, SCADA without extra transmitter.

A: PVDF has excellent resistance to most strong acids (hydrochloric acid, sulfuric acid). Not suitable for strong alkaline hightemperature longterm condition and special solvents (concentrated fuming acid). Confirm medium concentration & temperature before application.

A: PG13.5thread electrode matches standard plastic PVDF flowcell, stainlesssteel 316L flow cell, 1/2" or 3/4" pipeline flowcell, also applicable for immersion holder.

A: Two ways: ① Liquid calibration: immerse probe into standard conductivity calibration solution, complete onepoint / twopoint calibration on controller. ② Comparison calibration: compare onsite reading with portable calibrated conductivity meter reading, adjust offset parameter. Do drycalibration according to cell constant if standard solution unavailable.

A: Hardware sensor itself outputs conductivity value (μS/cm / mS/cm). Controller / digital probe can calculate TDS via configurable conversion factor. TDS factor is related to waterquality composition; fixed factor brings approximate value only, cannot replace laboratory gravimetric TDS test.

A: Main reasons: electrode surface fouling / scaling / sludge adhesion; airbubble covering electrode surface; flow velocity fluctuation; serious polarization for 2pole electrode under highsalinity sludge water. Suggestion: use inductive conductivity probe, install proper selfcleaning structure.

A: Available. Sanitary conductivity sensor with 316L stainlesssteel body, sanitary triclamp connection, support SIP 130 ℃ hightemperature shorttime sterilization. Not suitable for continuous longterm running at 130 ℃.

A: K=0.01 cell constant typical measuring range: 0.01 μS/cm ~ 200 μS/cm. Best performance for ultrapurewater (0.05520 μS/cm). Beyond upper limit will increase measurement error obviously.

A: Yes. Standard cable 5 m / 10 m; support custom length. For analog 2pole electrode, excessive longcable will introduce stray capacitance error. Digital RS485 type has better longdistance performance.

A: Yes. Conductivity changes sharply when highsalinity liquid mixes into purewater pipeline system. Sensor can capture sudden conductivity jump, for early warning of crosscontamination. It cannot identify contaminant chemical species, only detect salinity variation.

A: Depends on medium, temperature, fouling degree. General service life: 618 months. Heavyfouling highcorrosion electroplating wastewater may shorten to 36 months. Regular cleaning and maintenance can extend service life; inductive sensor is more recommended for electroplating wastewater.

A: Standard package does NOT include calibration solution. Calibration solutions can be supplied as optional spareparts upon customer request with extra cost.

A: Use inductive (toroidal / noncontact) sensor for: highconductivity liquid (>20 mS/cm), heavily polluted slurry, strong corrosive media, scalingprone solution. Inductive type has no direct metal contact with liquid, avoids surface fouling interference. Contact electrodes are preferred for purewater & lowconductivity scenarios.