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Working Principle

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.

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.

Using these values and following equation.
L(high) L(low) = C(high) C(low) / P × {ε(material) ε(air)}

device creates a chart of level to 4-20mA translation.


    Application : ROF

  • Open channel level to flow-rate measurement and calculator
  • Supports all common weirs and flumes
  • 4-20mA retransmission of either head (level) or Rate of Flow
  • Up-to 3 Relay outputs for either head (level) or Rate of Flow

    Application : LOH

  • Loss of Head measurement and calculator
  • 4-20mA retransmission of either high head, low head or loss of head
  • Up-to 3 Relay outputs for either high head, low head or loss of head

Features: (Common to both RoF, LoH)

  • Universal AC supply 80-260 VAC 50/60Hz.
  • Industrial DC supply 18 to 32 VDC.
  • Isolated 4-20mA output for remote monitoring and control.
  • 3 SDPT relays for local alarm or control.
  • Easy calibration to assist variety of installations.

Typical Mounting

Product Video

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Contact Us

Trumen Technologies Pvt. Ltd.
86, Tilak Path, Rambagh Indore
PIN: 452 007 MP. India

+91-731-656 2425, +91-731-243 5106,