Overview
The principle of the capacitive liquid level sensor is based on the capacitance formed between the positive and negative electrodes when a liquid medium is introduced. This capacitance changes linearly with the liquid level, and the variation in capacitance (i.e., the change in liquid level) is converted into a standard electrical signal output. The product’s core components utilize a highly integrated capacitive measurement chip, which undergoes precise temperature compensation and linear correction, offering high accuracy, high stability, and continuous measurement. It does not require drilling and can replace the original vehicle’s fuel float system, ensuring safety and reliability.
Features
- Independence: Directly measures fuel consumption by gauging the fuel level in the tank, without affecting the fuel system or pipelines.
- Convenience: Can be easily installed and secured using a flange, making it simple to operate.
- Uniqueness: Features a self-cutoff function for the measuring range. Users can recalibrate via a button, and the digital output can be adjusted using debugging software.
- Self-Adjustment: The sensor can adjust its range according to different tank sizes and be installed on-site. It also includes temperature compensation to automatically correct errors caused by fuel volume changes due to temperature fluctuations.
- Safety: Directly replaces the original vehicle fuel gauge, eliminating the need to drill new holes in the tank to install the capacitive sensor. The electronic compartment is explosion-proof by design and has passed explosion-proof certification. The sensor’s flange has two layers of leak-proof grooves to prevent fuel leakage.
- Stability: With no mechanical moving parts, the sensor’s mature and stable circuit design, along with high-quality components, ensures it can be used continuously for several years without replacement.
Applications
- Fuel Level Measurement
- Fuel Consumption Monitoring
- Fuel Level Abnormality Alarm
- Refueling Amount Statistics
Performance Parameters
| Power Supply | 5VDC, 12VDC, 15-28VDC |
| Displacement Range | 100~1500mm (Customizable) |
| Output Signal | 0-5VDC or 0-10VDC (Three-wire), 4-20mA or 0-20mA (Three-wire), RS485 |
| Load Capacity | Voltage signal output minimum load >5KΩ, current signal maximum output load resistance 600Ω |
| Non-Linearity Error | ±0.5%F.S or ±1%F.S |
| Repeatability Error | ±0.02%F.S |
| Temperature Coefficient | 0.025%/℃ |
| Operating Temperature | -40℃~+85℃ |
| Storage Temperature | -40℃~+100℃ |
| Rated Operating Pressure | 0.63MPa |
| Probe Material | Aluminum Alloy/Stainless Steel |
| Installation Interface | Flange Connection or Threaded Connection |
| Cable Outlet | Direct Cable Outlet |
| Enclosure Protection Level | IP65 |
Performance Parameters
| Pin Color | Project Definition | Typical Value |
| Red | Power Supply | +24V |
| Black | GND | GND |
| Blue | RS485 T/R+ | A |
| Orange | RS485 T/R- | B |
| Blue | Analog Voltage Output | VOUT |
| Blue | Analog Current Output | IOUT |
