Ionic contamination — dissolved ions raise conductivity and accelerate corrosion
Online Conductivity Sensor
ZW-HC101 · 0–20 μS/cm · CAN direct digital output
Cooling circuit
Overview
A conductivity sensor for hydrogen fuel-cell engines and vehicle thermal management systems. It measures conductivity by excitation at both electrode ends and reports a direct digital reading over CAN, keeping the coolant within the limits the stack requires.
Key features
- EMC-resistant design for use next to high-power electrical equipment
- Repeatable, stable readings over the service life
- Developed per IATF 16949 with CNAS automotive-grade EMC certification
Specification
Technical data
Technical specification — ZW-HC101
| Parameter | Value |
|---|---|
| Detection range | 0 – 20 μS/cm |
| Resolution | 0.1 μS/cm |
| Precision | ± 1.5 % F.S. |
| Working temperature | −40 – +100 °C |
| Working pressure | < 0.6 MPa |
| Power supply | DC 24 V (18 – 32 V) |
| Power consumption | ≤ 0.3 W |
| Signal output | CAN |
| Liquid-wetted material | SUS 316L |
| Protection grade | IP68 / IP6K9K |
| Weight | 150 ± 10 g |
| Installation | M22 × 1.5 / NPT 1/2 pipe |
Application
Where it is used
Stack degradation — a contaminated loop shortens stack life
Early warning — continuous CAN reporting lets the controller act before damage
Related reading
From the engineering notes
Background on the design decisions behind this component — all articles.
Cooling architecture and the insulation question
Why the coolant loop and the electrical barrier must be designed together, and which components keep them apart.
Isolated DC-DC first, then the coolant piping
The 100 Ω/V and 500 Ω/V rules come from touch-safety limits, not from the converter. Worked numbers for a 500 V stack on an 800 V bus, and what they mean for hose length and rigid tube.
Online Conductivity Sensor — product brochure (PDF)
Full specifications, model selection tables and engineering notes. Two pages, English.
Download PDF
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