{"product_id":"yokogawa-sc42-sp24-contacting-conductivity-sensor","title":"Yokogawa SC42-SP24 Contacting Conductivity Sensor","description":"\u003cp\u003eConfigured for high-precision electrolytic conductivity measurement in industrial liquid handling networks, the \u003cstrong\u003eYokogawa SC42-SP24\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eSC42\u003c\/strong\u003e Contacting Conductivity Sensor, provides direct physical and electrical execution of process fluid interface detection.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe Yokogawa SC42 conductivity sensor employs a structured suffix naming structure to specify wetted material composition, process connection type, cell constant, and electrode configuration.\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSuffix Position\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eCode\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eParameter Selection \/ Technical Definition\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase Model\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSC42\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eContacting Conductivity Sensor with integral Pt1000 RTD sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e-S\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWetted construction: Stainless steel AISI 316L and PEEK insulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eP\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlug-in connector interface; intrinsically safe certified (ATEX\/IECEx\/FM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Constant\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNominal cell constant C = 0.1 cm-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e4\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2-electrode structure configured for flow cell installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSC42-SP24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 0.45 kg (1.0 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e120 mm x 21 mm (4.72 in x 0.83 in) body diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to 135 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive sensor element (powered via external transmitter loop)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Type\u003c\/td\u003e\n\u003ctd\u003eContacting conductivity, 2-electrode design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Constant\u003c\/td\u003e\n\u003ctd\u003eC = 0.1 cm-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWetted Materials\u003c\/td\u003e\n\u003ctd\u003eStainless steel AISI 316L, PEEK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Element\u003c\/td\u003e\n\u003ctd\u003ePt1000 Class A RTD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcess Connection\u003c\/td\u003e\n\u003ctd\u003ePlug-in type socket connector for flow cell adaptation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Operating Pressure\u003c\/td\u003e\n\u003ctd\u003e10 bar at 25 deg C (145 psi at 77 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIngress Protection\u003c\/td\u003e\n\u003ctd\u003eIP65 \/ NEMA 4X (when properly mated to cable connector)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control \u0026amp; DCS Instrument Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe SC42-SP24 sensor incorporates an integrated Pt1000 RTD element designed to deliver rapid dynamic temperature signals to downstream transmitter electronics for real-time automatic temperature compensation. Operating with a defined C = 0.1 cm-1 cell constant, the dual 316L stainless steel electrodes eliminate current fringing effects through targeted PEEK dielectric isolation. The hardware integrates seamlessly into 4-20 mA HART loop protocol transmitters and FOUNDATION Fieldbus \/ Profibus PA networks, providing high channel-to-channel isolation to prevent ground loop noise from degrading millivolt-level electrode feedback.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the cell constant (C = 0.1 cm-1) affect transmitter excitation frequency selection?\u003c\/p\u003e\n\u003cp\u003eA: A cell constant of 0.1 cm-1 is optimized for low-to-medium conductivity process fluids. Downstream transmitters apply an alternating current (AC) voltage waveform across the electrodes, adjusting frequency dynamically to minimize polarization resistance and capacitive reactance at the electrode-liquid boundary.\u003c\/p\u003e\n\u003cp\u003eQ: What precautions must be observed regarding the plug-in connector during field wiring?\u003c\/p\u003e\n\u003cp\u003eA: The plug-in connector interface must remain free of moisture, oil, and conductive debris during assembly. Contamination across the high-impedance connector pins will degrade signal integrity and cause erroneous temperature compensation or conductivity drift readings on the DCS controller.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eInspect the 316L stainless steel electrode surfaces and PEEK body prior to installation. Ensure no oils or greases remain on the measuring surfaces; clean with isopropyl alcohol if necessary.\u003c\/li\u003e\n\u003cli\u003eThread the sensor assembly into the dedicated flow cell using standard hand-tightening torque before applying a final 1\/4 turn with a open-ended wrench. Do not overtighten to prevent damaging the internal seal face.\u003c\/li\u003e\n\u003cli\u003eKeep sensor cabling strictly separated from high-voltage AC lines, motor drives, and switching inductive loads to prevent high-frequency noise injection into the microvolt measurement circuit.\u003c\/li\u003e\n\u003cli\u003eEnsure the cable shield is grounded at a single point within the field transmitter terminal housing, maintaining a continuous floating shield along the sensor body run.\u003c\/li\u003e\n\u003cli\u003eVerify that the flow cell mounting orientation keeps the sensing surfaces continuously fully submerged under positive process liquid flow without entrapped air pockets.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":53438921081141,"sku":"SC42-SP24","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/SC42-SP24.png?v=1788246577","url":"https:\/\/www.5gplc.com\/products\/yokogawa-sc42-sp24-contacting-conductivity-sensor","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}