A capacitive level sensor uses a probe inside the tank: as the liquid level changes, the capacitance between probe and tank wall changes and is converted to 4–20 mA or 0–10 V. No moving parts, probe rated up to 200 °C, 1 % accuracy, IP67 – ideal for boiler water level, tanks and vessels. ISE supplies it in line with European EN 61326-1 and EN 60529.
How a capacitive level sensor works
Probe and tank wall (or reference tube) form a capacitor. Liquids have a higher dielectric constant than air (water εr ≈ 80), so capacitance rises linearly with level. Set 0 % and 100 % on the actual liquid.
Capacitive level sensor specifications
| SPECIFICATIONS | |
| Supply: | |
| – Current output (var. „I“) | 9 … 34 V DC |
| – Voltage output (var. „U“) | 12 … 34 V DC |
| Output type (var. “I”) | 4 … 20 mA (2-wire) |
| Output type (var. “U”) | 0 … 10 V (3-wire) |
| Accuracy | 1% |
| Ambient temperature | -40 … +85°C |
| Probe operating rating | -40 … +200°C |
| Thread | Thread M27x2 ; M30x1,5 |
| G ¾“ – NPT¾ TriClamp | |
| Ingress protection | IP67 |
Choosing the right level technology
Applications
- Boiler water level, condensers, hot water tanks – see the capacitive boiler level probe.
- Oil, fuel and chemical tanks, small vessels.
- Hygienic CIP tanks (TriClamp).
Reference standards
| Standard | Scope |
|---|---|
| EN 61326-1 | EMC |
| EN 60529 | IP67 |
| EN 12953-9 | Boiler water level limiting devices (for boiler use) |
Related products
Contact ISE
EQUIPMENT INDUSTRIAL SOLUTION CO., LTD (ISE) – Ho Chi Minh City, Vietnam.
Contact us: Sales +84 909 617 185 – Technical +84 979 117 185 – Email: [email protected]
