Smart SSI

MPILC

MPILC, which means Microprocessor-based Level Controller, consists of an electronic evaluation unit, an insert and a probe. It has a remote display for 0 – 100% read out. It also has a three potential-free relay contact which can be programmed for independent switching or for a pump control action.

Principle

The probe is mounted from the top of the vessel and it comprises of a sense electrode which is electrically isolated from the metallic tank by means of a suitable insulator. The sense electrode and the vessel wall serve as the two electrodes of a capacitor with the service material acting as the dielectric. A change in the material level causes a change in the dielectric, which in turn causes the value of this tank capacitor to change. An accurate measurement of this change affords an indirect measure of the level of the material in the tank.

Features
  • Microprocessor based system for higher degree of reliability and stable operation in noisy environments, made possible with the use of intelligent digital communication between the electronic insert and the evaluation unit
  • Calibration possible without completely filling and emptying the vessel
  • Three relays for programming three levels independently or as pump control logic
  • Three potential free change over relay output contacts
  • All parameters programmable via Five keys and Five multi-purpose LED displays
  • Galvanically isolated 4 to 20mA output available for connecting to PLC
  • Built-in universal power supply for 90 to 260 V AC or for 24 V DC operation.
Mechanical Specifications

Probe length

  • Extendible from 100 mm up to 3 Meters for Rod probe
  • Above 3 Meters (Flexible Rope Probe)

Enclosure

  • W – Weatherproof Probe housing and controller
  • F – Flameproof enclosure for probe housing suitable for gas group IIA & IIB

Process Connection (Mounting Arrangement)

  • Threaded Mounting: Standard 1 1/2”, 2” BSP / NPT
  • Flanged Mounting: As per specification

Extension Length

  • Pipe- GI / SS: 200mm – 3000mm
  • SS / GI Rope above 3 Meters

Wetted Parts and Mounting Material

  • S4: SS-304
  • S6: SS-316
  • MS: Mild Steel Plated

Process Temperature

  • A (Ambient): below 100°C
  • H1 (High temperature): 100°C – 150°C
  • H2 (High temperature): above 150°C – 200°C
Electrical Specifications

Input Power Supply and Outputs

  •  U: Universal Supply 90 – 265 V AC & 24 V DC
  •  T: Three SPDT relay output (Independently settable & pump control)
  •  A: Analog output (4-20mA, galvanically isolated)

Power Consumption

  • 3.5 VA (approx)

Fail-safe settings

  • Field selectable – Through toggle switches

Indication Range

  • -50% to 150% multi-purpose
  • 5 digit 0.5” LED

Accuracy

  • +/- 1-2% of Full Measuring Span

Switching Delay

  • Programmable up to 99 sec
Applications Specifications
  • Suitable for continuous monitoring of conductive and non-conductive liquids
  • Granular material, homogeneous composition having stable dielectric constant
  • Water based solution
  • Oil
  • Slurries
Certifications
  • Flameproof Housing IIa / IIb certified by CMRI, Dhanbad
  • IP-67 Certified by ETDC, Indore
  • ISI Marking for Flameproof Enclosure (Bureau of Indian Standards)
Switching Indication
  • 3 Red LED’s for Alarm indication    
  • Seven Segment display: 5 digit 0.5” LED