| Model: | TLC |
|---|---|
| Brand: | Trumen |
| Origin: | Made In India |
| Category: | Electronics & Electricity / Electronic Instrument / Analysis Instrument |
| Label: | level transmitter , fuel level sensor , level sensor |
| Price: |
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| Min. Order: | 1 pc |
| Live Chat: | Last Online:09 Jan, 2016 |
Working principle
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The probe forms a capacitance with the metallic tank-wall.
The capacitance is sum of three capacitance :- C(air)=ε(air) × P × (H - L) C(material)=ε(material) × P × L C(residual) is due to device itself. |
| where ε(air) is the dielectric constant of air ≈1.
ε(material) is dielectric constant of material. |
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P is constant of probe and installation, H is the active length of probe and L is the level of material. Capacitance to level translation is performed with the aid of on-site calibration also called "wet-calibration" |
| The device stores a low level capacitance as level for 4mA and
high level capacitance as level for 20mA as defined by the user. |
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Using these values and following equation. C(high) C(low) L(high) L(low) = ------------------------------ P × {ε(material) ε(air)} device creates a chart of level to 4-20mA translation. |
