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The probe comprises of sense, shield and ground electrodes electrically isolated from the metallic tank by means of suitable insulators. The sense electrodes and the vessel wall serve as the two electrodes of an imperfect capacitor with the service material as the dielectric. A change in material level causes a change in admittance of this imperfect tank capacitors.


Power Consumption: Less than 05 VA

Power Supply: 18 -55 V DC, 90-260 V AC

High temperature durability (Up to 1000°C)

Suitable for very dusty environment

Immune to application material coating on the probe


Mechanical Specifications

Electrical Specifications

Probe Length

Rod Probes:200mm – up to 3000mm

Rope Probes:Extend up to 600mm to 12000mm


P5:IP-65 Weatherproof housing

FA:Flame-proof for Gas Groups IIA and IIB

Process Connection(Mounting Arrangement)

Threaded Mounting: 1-1/2”, 2” BSP/NPT

Flanged Mounting: As per specification

Tri-Clover (as per specifications)

SMS union coupling type





Wetted Parts and Mounting Material

S4: SS-304

S6: SS-316

SL: SS 316L

Process Temperature

A (Ambient) below 80°C

H1 (High temperature) up to 150°C

H2 (High temperature): up to 250°C

H3 (High temperature): up to 600°C

H4 (High temperature): up to 1000°C with cooling fins


SLA series with electronics insert ICA 3000

Sticky media e.g. slurries, wet sand

Split electronics, sensor – controller distance maximum 1km

SLA..M with Dot Display

Low dielectric media e.g. cement, fly ash, clinkers, ESP hoppers

Remote electronics with 15m distance between probe and controller

SLA..B with Bar Display

Remote Electronics with maximum distance of 50m from the probe

Low dielectric media e.g. cement, fly ash, clinkers, ESP hoppers


Integral type (Electronics integral with probe)

Remote type (Electronic separated by a special cable)

Input power supply & Outputs

SLA 122/ 120M / 120B: Single SPDT with (90-260 V AC) / 24 V DC

SLA 222 / 220M / 220B: Double SPDT with (90-260 V AC) / 24 V DC

SLA 322 / 320M / 320B: Single SPDT & Time Delay with (90-260 V AC) / 24 V DC

SLA 622 / 620M / 620B: Double SPDT & Time Delay with (90-260 V AC) / 24 V DC

SLA 822: Double SPDT, Time Delay & two channels with (90-260 V AC) / 24 V DC

SLA 922: Three SPDT, Time Delay & three channels with (90-260 V AC) / 24 V DC

Power Consumption

Maximum 5 W

Fail-safe Setting

Field selectable (through toggle switch)

Open: Fail-safe High, Close: Fail-safe Low

Response Time

0.5 – 2 Sec

Time Delay Settings

Cover and Uncover Delay: 0.5s to 60s, through potentiometer

Sensitivity Setting

Field Selectable (through toggle switches)


100 KHz and 500 KHz

Applications Specifications

For all Industries requiring level limit detection in Bulk Material Handling

Powders, sand, sugar, Pulverized coal, Food grains

Cement, Stones, Fly-ash, Bed-ash, Clinkers

Granular material

Sticky and hygroscopic materials like honey, paste, cream, syrup, etc.

Switching Indication

2 LED’s / Dot / Bar type display

Red: Alarm, Yellow: Sensing, Green: Normal