Liquid Level Sensing Module - LLM

The Liquid Level Sensing Module LLM (Liquid-level Meter) measures changes in dielectric constant through a capacitive high-frequency circuit. The module outputs the liquid capacitance value as a digital signal, which is converted into liquid level height. It can non-contact measure continuous or segmented liquid levels, and the module can also provide liquid temperature information for compensation. The product can be widely used in various liquid level and water immersion detection scenarios.

I. Features of Liquid Level Sensing Module - LLM:

Non-contact measurement: can penetrate 1-15mm non-metallic containers
Capacitance measurement range: 0.5pF-100pF
Capacitance measurement accuracy:
-0.5-10pF, accuracy 0.05pF
-10-30pF, accuracy 1%
-30-100pF, accuracy 2%
Capacitance measurement resolution: 0.001pF
Sampling interval: 2-10ms adjustable
Temperature characteristics (optional)
Typical temperature measurement range: -40℃~125℃
Temperature resolution: 16-bit ADC 0.004℃
Typical temperature measurement accuracy: ±0.5℃, customizable to ±0.1℃
Long-term operating temperature: -40℃~85℃
Product Models
Liquid Level Sensing Module LLM (with temperature display)
Self-configured electrode liquid level sensing module LLM-S (without temperature display)

II. Applications of Liquid Level Sensing Module - LLM:

Underground sewage

Manhole cover water accumulation

River water level detection

Deep water level detection

Water immersion detection