Choosing the right sensor is half the battle; correct installation and commissioning are the final, crucial steps to unlock its full potential. Shenzhen Sincotec Technology Co., Ltd. provides not only quality products but also comprehensive technical support. This guide walks you through correctly installing and commissioning our capacitive level sensors.1. Pre-Installation Preparation
Verify Model: Confirm the sensor model (e.g., XKC-Y25) matches the design selection.
Read Manual: Carefully review the included datasheet, especially electrical parameters and installation notes.
2. Selecting & Preparing the Mounting LocationCore Principle: Ensure the sensor's sensing face is directly opposite the liquid area, with no metal or other conductive material in between.
Non-Metallic Tank (Recommended Method):
Location: On the tank exterior, choose a flat area with uniform wall thickness, no ribs.
Preparation: Clean the exterior wall at the mounting point. Applying a thin layer of silicone grease (optional) to the sensor's back or tank wall can improve coupling.
Fixing: Securely fasten the sensor using the provided clamp, stainless steel zip tie, or high-strength mounting tape (high-temp rated). Ensure it cannot shift or detach during use.
(Diagram: Cross-section showing sensor attached to a cylindrical PE tank wall.)
Metallic Tank or Through-Hole Mounting:
Location: Drill a hole in the tank top or side wall. Diameter must match sensor thread or probe.
Sealing: Must use the provided seal or locknut to ensure a watertight, leak-proof fit.
Insulation: Ensure the sensor's metal housing/thread is insulated from the tank's metal wall (unless using a dedicated grounded model for metal tanks).
(Diagram: Cross-section showing sensor threaded into a stainless steel tank top.)
3. Electrical WiringSafety First: Ensure all power is OFF before wiring!
Identify Wires: Sincotec sensors typically use standard color codes:
Brown (BN): Power Positive (Vcc)
Blue (BU): Power Negative / Ground (GND)
yellow (BK): Signal Output (OUT)(Always verify with the actual product label.)
Connect to Controller:
Connect BN(+) and BU(-) to the control board's DC power supply positive and negative respectively (ensure voltage matches, e.g., 12V or 24V).
Connect BK(OUT) to the control board's digital input port (I/O).
If the controller has NPN (sinking) inputs, the sensor should be NPN output type, where the OUT wire acts as a switch to ground (GND).
(Diagram: Wiring schematic between sensor and a typical water purifier control board.)
4. Power-On & Sensitivity Adjustment
Initial Power-Up: Apply power. Observe the sensor's LED indicator (if present). Normal operation shows corresponding states (e.g., LED on for dry, off for wet, or vice versa).
Sensitivity Adjustment: Some Sincotec sensors have a multi-turn trimmer potentiometer for fine-tuning.
Method: With the tank level near the desired trigger point, slowly rotate the potentiometer until the output signal switches precisely at that level. Clockwise usually increases sensitivity (longer range), counterclockwise decreases.
Note: Make small adjustments, observing the output change each time. Avoid excessive sensitivity causing false triggers (e.g., mistaking tank wall for water) or insufficient sensitivity causing missed detection.
Functional Testing:
Dry Test: Empty the tank. Verify the output signal matches the "dry" state setting (e.g., high level).
Wet Test: Fill the tank to the trigger level. Verify the output signal switches (e.g., goes low).
Repeatability Test: Cycle "dry-wet-dry" multiple times. Ensure the output responds accurately and quickly each time.
A: Check for reversed power connection or incorrect voltage. Check if sensitivity is set too high/low. Verify mounting location isn't problematic (e.g., aimed at a seam or internal obstruction).
Q: Unstable, flickering output signal?
A: Check for loose connections. Check for strong EMI sources nearby (e.g., large motor). Try slightly reducing sensitivity.
Q: Sensing distance is less than specified?
A: Check if tank wall thickness exceeds the sensor's effective range. Check if tank material is special (e.g., contains metal fillers).
Following this guide will help you successfully install and commission Sincotec capacitive level sensors. Our technical support team is ready to assist if you encounter issues. Our goal is to make every installation a success.
