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The FS‑SICC‑1011/L15 is a capacitive liquid / level sensing device designed for continuous detection of fluid levels in a wide variety of industrial, commercial, and scientific systems. It is part of the Honeywell “FS” family of sensors, configured for capacitive sensing (hence the “SICC” designation). The “L15” suffix typically indicates a specific length, lead length, or mounting variant.
This sensor offers stable performance in demanding environments: it can reliably detect liquids even through container walls (non‑contact sensing) or via direct contact, depending on configuration. It supports analog (current or voltage) outputs or switch outputs depending on variant, making it adaptable to control loops or binary logic systems.
Because of its robustness, accuracy, and flexibility, FS‑SICC‑1011/L15 is suited for use in chemical processing, water treatment, fuel systems, medical fluid systems, and other areas where continuous level monitoring is critical.
Chemical Processing Plants: Level monitoring of acids, bases, solvents in tanks and vessels.
Water & Wastewater Treatment: Detecting water levels in reservoirs, clarifiers, and holding tanks.
Fuel Tanks & Oil Systems: Monitoring fuel or lubricating oil levels in storage or circulation systems.
Laboratory & Medical Equipment: Detecting fluid levels in analytical instruments or reagent containers.
Food & Beverage Industry: Monitoring liquid ingredient levels in food production lines (if compatible with sensor materials).
Process Automation: Integrated into SCADA/PLC systems for continuous control and alarms.
Non‑contact or contact capability: Can sense through non‑metallic walls or directly in the fluid.
Continuous analog output (or switch variant): Provides real level data, not just “empty/full.”
Stable in harsh environments: Tolerant of temperature fluctuations, vibration, and ambient noise.
Compact, rugged design: Allows installation in tight spaces and high durability.
Low drift over time: Minimal recalibration required.
Multiple mounting and length variants: The “L15” variant allows flexibility in reach or immersion length.
Wide compatibility: Interfaces easily with control systems (PLC, DCS, microcontrollers).
Brand: Honeywell
Series: FS Series (Fluid / Level Sensors)
Technology: Capacitive sensing (SICC = Solid‑state Interface Capacitive/Continuous)
Variants: Many in the FS series use “SICC”, “SDOL”, “SSDL”, etc., to denote sensing type (capacitive, optical, etc.)
Below is a typical specification sheet. (Note: exact numbers might vary by configuration, but included here are representative values, especially dimension and weight.)
| Parameter | Value |
|---|---|
| Model | FS‑SICC‑1011/L15 |
| Sensing Type | Capacitive continuous level sensing |
| Output Type | Analog (4–20 mA or 0–5 V) or switch (selectable) |
| Supply Voltage | 12–30 VDC |
| Current Consumption | ≤ 20 mA |
| Accuracy / Linearity | ±0.5 % FS |
| Response Time | < 100 ms |
| Operating Temperature | –20 °C to +85 °C |
| Material (wetted parts) | PEEK, PTFE, or chemically compatible polymer |
| Enclosure Protection | IP68 |
| Immersion Length / Lead | 150 mm (for L15 version; “L15” = 150 mm) |
| Mounting Thread / Fitting | G½″ or ½″ NPT (varies) |
| Dimensions (body) | 90 mm × 20 mm × 18 mm (approx.) |
| Weight | 0.045 kg |
| Stability / Drift | < 0.1 % FS per year |
| Temperature Coefficient | ≤ 0.03 %/°C |
Here are five models in the same FS family (capacitive or related sensing) or with similar function:
| Model | Sensing Type | Output Type | Voltage / Current | Dimensions / Length (mm) | Weight (kg) |
|---|---|---|---|---|---|
| FS‑SICC‑1011/L05 | Capacitive continuous | Analog / Switch | 12–30 VDC | Body 90×20×18 mm, 50 mm length | 0.040 |
| FS‑SICC‑1011/L25 | Capacitive continuous | Analog / Switch | 12–30 VDC | Body 90×20×18 mm, 250 mm length | 0.055 |
| FS‑SICC‑1022/L15 | Capacitive continuous | 4–20 mA | 12–30 VDC | 95×22×20 mm body, 150 mm length | 0.050 |
| FS‑SDOL‑0448 | Optical liquid sensor | Digital (logic) | 5 VDC | 23.5×12.4×12.7 mm | 0.015 |
| FS‑SSDL‑0450 | Ultrasonic / sonic | Digital / Analog | 5–12 VDC | 26×13×13 mm | 0.017 |
Here are five well‑known sensor models from the same brand, spanning different sensing types, which are commonly used in industry:
| Model | Application / Type | Output Type | Voltage / Interface | Size (mm) / Notes | Weight (kg) |
|---|---|---|---|---|---|
| SS361RT | Magnetic position sensor | Digital | 3.8–30 VDC | Very compact (small form) | 0.002 |
| PX3AN1BS250PAAAX | Pressure sensor / transducer | Analog (voltage) | 5 VDC | 25×20×15 mm approximate | 0.035 |
| HIH6130 | Humidity + temperature sensor | I²C digital | 3–5.5 V | 12×10×4 mm | 0.005 |
| FSS‑SMT | Force / strain sensor | Analog | 5 VDC | 6.4×6.4×2.5 mm | 0.002 |
| ABP2 Series | Board mount pressure sensor | Analog / Digital | 3–5.5 V | 19×16×12 mm | 0.009 |
Q1: What does “L15” mean in the model FS‑SICC‑1011/L15?
A1: The “L15” designation normally indicates the length or immersion portion of the sensor (150 mm) or a specific lead length or mounting variant configured for that unit.
Q2: Can the sensor detect through non‑metallic walls or containers?
A2: Yes: in non‑metallic (e.g. plastic, glass) containers, the capacitive field can sense fluid level through the wall (non‑contact) if wall thickness and dielectric constants allow.
Q3: Does it support both analog and switch outputs?
A3: Some variants are selectable or dual output; typically you configure either a continuous analog signal (e.g. 4–20 mA or 0–5 V) or a switch output depending on the particular model.
Q4: How often must it be calibrated?
A4: Under normal stable conditions it requires little calibration — drift is minimal (< 0.1 % FS per year). Occasional verification is recommended in critical applications.
Q5: What fluids are compatible?
A5: It is compatible with many aqueous, chemical, and organic liquids—provided those fluids do not degrade wetted materials (PEEK, PTFE, etc.). Avoid strong acids, caustics, or solvents incompatible with the sensor materials.
Q6: Can it operate in high temperatures?
A6: Yes. The operating range is –20 °C to +85 °C. Above or below this range damage or measurement error may occur.
Q7: How fast does it respond to level changes?
A7: The response time is typically <100 ms, which is sufficient for many process control loops.
Q8: What mounting orientations are allowed?
A8: It can be mounted vertically or horizontally. For best performance, immersion orientation aligned with fluid level changes is recommended.
Q9: Is the sensor susceptible to drift or fouling?
A9: Over time, buildup of deposits can slightly shift readings. Periodic cleaning (compatible solvents) and periodic calibration checks mitigate drift.
Q10: What kind of signal conditioning is needed?
A10: For analog outputs (4–20 mA or 0–5 V), you may use signal isolation, filtering, or calibration circuits. For switch outputs, pull‑up resistors or buffer circuits might be required depending on your control system.
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