Yokogawa SC42-EP15 Conductivity Sensor
A two-electrode epoxy insertion sensor with Pt1000 temperature compensation for moderate-conductivity process liquids.
Product Overview
SC42-EP15 is a Yokogawa contacting-conductivity sensor with a two-electrode measuring system, a nominal 1 cm⁻¹ cell constant and an integral Pt1000 temperature element. It is intended for moderate-conductivity liquids such as surface water, wastewater and salt solutions.
The 100 mm insertion design uses an epoxy body and graphite electrodes. Selection must also include the correct holder, cable, analyzer and process-material review.
Performance
- Provides conductivity measurement and temperature-compensation input in one process sensor.
- Uses graphite electrodes in an epoxy body for the documented application range.
- Provides a 90% temperature response in less than three minutes under the published test conditions.
- Supports permanent or semi-permanent installation through the matching Yokogawa holder system.
Technical Details
| Manufacturer | Yokogawa Electric Corporation |
|---|---|
| Model | SC42-EP15 |
| Measurement Method | Two-electrode contacting conductivity |
| Nominal Cell Constant | 1 cm⁻¹ |
| Temperature Element | Pt1000 to IEC 751 |
| Pressure Rating | 10 bar / 142 psig |
| Maximum Temperature | 110 °C / 230 °F |
| Temperature Response | 90% in less than 3 minutes |
| Sensor Body | Glass-filled epoxy resin |
| Electrodes | Graphite impregnated with resin |
| Connector Contacts | Gold plated |
| Connector Material | Polyamide |
| Insertion Length | 100 mm |
| Holder System | Yokogawa FF40/FS40 fittings and subassemblies |
| Quality Certificate Option | /Q |
System Integration
- Select the analyzer input for a two-electrode, Pt1000, 1 cm⁻¹ sensor.
- Review chemical compatibility of the epoxy, graphite, connector and sealing materials with the process.
- Use the matching holder and WU40 cable arrangement for the installation.
- Calibrate with the process/analyzer procedure and check for coating, bubbles and flow effects.
Applications
- Surface-water and wastewater conductivity measurement.
- Salt-solution and general moderate-conductivity process monitoring.
- Insertion or flow-fitting installations using the Yokogawa SC42 accessory system.
FAQ
How should process compatibility be approved for SC42-EP15?
Provide liquid composition, concentration, cleaning chemicals, pressure, normal/cleaning temperature and flow conditions so the epoxy, graphite and sealing materials can be reviewed.
Why is SC42-EP15 not automatically interchangeable with SC42-EP15D?
The sanitary D version has a different mechanical execution and insertion length, so holder, process connection and hygienic requirements must be checked.
Which analyzer details should accompany an SC42-EP15 order?
Send the analyzer model, input type, cable length, temperature-compensation setup and present cell-constant configuration to avoid an electrical mismatch.
What installation conditions can make SC42-EP15 read incorrectly?
Electrode coating, trapped bubbles, poor immersion, an unsuitable flow location or incorrect temperature compensation can bias the reading even when the sensor is healthy.
What maintenance evidence is useful when replacing SC42-EP15?
Record calibration slope/offset, cleaning frequency, coating type, process exposure, cable condition and the reason the existing sensor failed.
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