High Temperature And High Pressure Corrosion Resistant Capacitive Level Sensor For Boiler Level Monitoring

The High Temperature and High Pressure Corrosion Resistant Capacitive Level Sensor is specifically engineered for boiler level monitoring applications. Designed to withstand extreme conditions, this sensor delivers reliable and accurate level measurement in high-temperature, high-pressure boiler systems. Its corrosion-resistant construction ensures long-term performance while maintaining operational safety and efficiency through precise real-time level data.

• Modbus protocol for easy system integration
• Simple, maintenance-free design with no moving or elastic components
• Multiple signal output options for flexible system configuration
• Accurate measurement unaffected by temperature, liquid specific gravity, or container shape/pressure
• Ideal for measuring strong corrosive liquids including acids and alkalis
• Comprehensive overcurrent, overvoltage, and power supply polarity protection
• Optional wireless remote transmission capability
• Compatible with any liquid medium

• Detection range: 0.1～3m
• Capacitance measurement range: 10PF～500PF
• Accuracy: 0.1 class, 0.2 class, 0.5 class, 1 class
• Pressure range: -0.1MPa～32MPa
• Probe temperature resistance: -50～250℃
• Ambient temperature: -40～85℃
• Storage temperature: -55℃～+125℃
• Output signal: 4～20mA, 485 communication
• Wireless communication distance: <200 meters (optional battery power supply 3.3-36V)
• Power supply voltage: 5～36V DC
• Material: 316 stainless steel, 1Gr18Ni19Ti or PTFE
• Long-term stability: ≤0.1%FS/year
• Temperature drift: ≤0.01%FS/℃ (0～70℃ range)
• Explosion-proof grade: ExibIICT6
• Protection level: IP67

The capacitive liquid level sensor consists of two main components: the sensor probe and transmitter. The structure varies based on application requirements.

A: Sensor probe that extends into the container or measuring tube

B & C: Gas phase and liquid phase connection flanges for equipment interface

D: Measuring cylinder that forms capacitance with the sensor electrode

E: Drain flange for periodic cleaning to maintain measurement accuracy

F: Transmitter that converts capacitance changes to 4-20mADC standard signal

The KSLV606 display model supports two wiring methods:

RS485 Connection:

4-20mA Connection:

Common transmitter wiring methods:

Standard Installation:

Connect the gas-liquid phase flanges to equipment flanges with gaskets and bolts. Ensure outlet pipes are clean and sealing surfaces intact before installation.

Boiler-Specific Installation:

Special heat-dissipating structure protects transmitter from high temperatures. Ensure correct orientation with transmitter positioned below.

1. Prepare transparent pipe with scale, precision ammeter, rubber stoppers, and test medium
2. Connect pipe to liquid phase port, block drain, keep gas phase open, and connect ammeter
3. Add medium at 0%, 25%, 50%, 75%, and 100% levels, comparing ammeter readings to expected 4mA, 8mA, 12mA, 16mA, and 20mA outputs

Display shows zero: Check 24V power supply, transmitter for shorts or quality issues

Current below 4mA: Verify liquid level position, transmitter adjustment, or potential defects

Current exceeds 25mA: Check for transmitter circuit shorts or excessive current adjustment

Display fluctuations: Examine actual liquid level stability, connection quality, or transmitter issues

No display change: Test transmitter functionality and check for pipe blockages or connection breaks

Slow response: Clean sensor from impurities or check for partial gas phase blockage

1. Verify product documentation before installation
2. Ensure interface compatibility with equipment
3. Follow wiring instructions precisely
4. Handle with care - avoid disassembly or impact
5. Stop use and investigate any abnormalities
6. Store in original packaging in cool, dry conditions
7. Protect sensor from damage during handling
8. Implement lightning protection measures
9. Ground transmitter casing (resistance <4Ω)
10. Use certified safety barriers for 485 communication
11. Follow safety barrier installation requirements
12. Use appropriate power transformers in hazardous areas