Call us : +(91)-9370149560

EL 31/1, Electronic Zone, MIDC, Bhosari

Pune, Maharashtra- 411 026, (India)

Safety Switches for Material Handling Plants

Most rugged, reliable and dependable range of safety switches, conveyor safety switches, electronic switches, electronic conveyor switches etc. A must for every conveyor and material handling plant. Thousands of switches are in use at cement, fertilizer, steel, mining and power plants. Specially developed field mounting enclosures with added safety features.

Control Instruments   Send Enquiry

Conveyor Safety Switches

Our Control Instruments are used in almost all the industries for indication, data-monitoring & control panels such as temperature, time, counting, RPM, humidity etc.

  • Material Level Switch Tilt Switch
  • Chute-Block Detector
  • Boot Level Indicator
  • Vibrating Fork Type Level Switch
  • Paddle Type Level Switch
  • Ultrasonic Level Transmitter
  • Radar level Transmitter
  • Anti collision switch for cranes
  • De-Interlocking Switches

RF Capacitance / Admittance Type Level SwitchRFLS


Applications :

  • Detection of levels of solids, liquids granules food grains and powders
  • Detection of top and bottom levels of coal bunkers
  • Detection of chute blockage in feeding hoppers
  • Level detection in cement silos
  • Level detection of Fly ash
  • Level detection for Stock Pile

Principle of Operation :

The RF Level switch operates on the basis of RF absorption. The electronic unit generates a sinusoidal wave, applied to the electrode creating a field around it. RF environment absorption changes (Electrical Loss) around the electrode are reflected on the changes of generator supply current. Such changes caused by increase in level is amplified and used to actuate the relay. Special Coat-guard amplifier is incorporated in the circuit, which will ignore the effect of deposition.
The RF Admittance type, point level switch, designed with special sensing probe, using special shield coat-guard circuit and three element probe. The level switch immune to the material built-up on the probe and material bridging between the probe and hopper wall.


Features :

  • Three Element coat-guards Technique: Ignores material built-up on probe
  • Fast end easy installation: Simple to calibrate
  • Suitable for highly dusty environment
  • Field selectable operation logic : Configurable high or low point switching
  • Economical

Techhnical Specifications :

  • The electronic circuit can be integral with probe housing, cast Al.,
    IP 65. or can be remote mounting
  • Ambient Temperature: 0 60 Deg. Cent. (For Fly Ash, we have special sensors with PT-FE) & ceramic coating. Please specify application area and working temperature.)
  • Control Supply: 230V AC, 50 Hz (+_15%) (Standard), other voltages
    like 110V AC, 24V DC are also available on request
  • Output: 2C/o Relay contact, rated for 5 Amps. Resistive @ 230V AC
  • Switching Delay: 2 20 secs.
  • Safety Operation: Field selected for minimum or maximum switching
  • Switch status LED: Green: Normal, Red: Alarm Yellow: Power ON
  • Particle size : max 30 mm

Ultrasonic Level Transmitter

Applications :

  • Various liquids including water storage tank
  • Moderate range solids such as loading, bagging hoppers
  • Mineral Oil
  • Cost effective Level Measurement for Multiple silo
  • Versatile : Short or long range liquid or Dusty solids application

Features :

  • Fully temperature compensation facility
  • Easy to install
  • Automatic variable gain
  • Plug in terminal
  • Differential Level measurement
  • Sensonic Transducer Technology
  • Advanced, process adaptive signal processing,
    secondary lightning protection

Principle of Operation :

Integrated compact Ultrasonic Level Transmitter with process current and HART communication as standard for liquid applications only. Not recommended for foam liquid surface. They are based on the principle of ultrasonic rays. It is capable for liquid applications upto 10 Mtrs. range.The transducer is fitted to the top & faced down towards the material being measured. The transmitter then fires electronics pulses, which the transducer convert into acoustics pulses (Ultrasonic rays). These pulses travels to material & is reflected back from the same to the sensor. Transducer then converts these pulses again into signal, and accordingly giving 4-20 mA DC analog, isolated output. With reference to the time taken by the pulses to travel from transmitter and to reflect back from the material to the receiver in the sensor, we can determine the distance

Specifications :

  • Supply : 230V AC or 24VDC
  • Output : 4-20mA, Plus 1 Relay output
  • Enclosure : Polycarbonate, IP65
  • Range : 30mtr (For solids) & upto 10 Mtrs. for liquid application
  • Temperature range : -30 to 65 degree


Inform Following Details so as to offer proper model

  • Area of application
  • Specifications / dimensions of tank / hopper
  • Measuring range

  • Measuring accuracy expected
  • Material to be sensed
  • Particle size with moisture, dust contents
  • In case of liquid whether foam, waves & vapor are present
  • Temperature / pressure

  • Material of transducer (for corrosive liquids )

  • Output required
  • Power supply Two wire or four wire type
  • Mounting Flange / thread mounting
  • Local indication required

  • Digital communication like HART or RS 485 ( with MODBUS ) is required

Radar Level Transmitter


Applications :

  • For level monitoring of liquids and free flowing solids
  • Suitable for highly dusty environments such as cement industry
  • Less affected by environment effects like wind, rain etc.

Operating Principle :

Radar Level Transmitters operates on the principle of Frequency modulated continuous wave. However, MicroTREK Level Transmitters operates on Time domain Reflectometry principle. A wave is emitted by the antenna. As soon as the pulses reaches the surface of the medium, it is reflected back to the electronic module. Level distance is directly proportional to the flight time of the pulse. The measured Level data is converted into 4-20 mA DC analog, isolated output. With reference to the time taken by the pulses to travel from transmitter and to reflect back from the material to the receiver in the sensor, we can determine the distance.

Features :

  • Minimizes signal loss
  • Eliminates false echoes
  • No moving parts
  • High accuracy
  • Solid, Flexible & co-axial probes
  • Non-contact type Level Transmitters

Specifications :

    2 wire TDR Level Transmitter & FMCW for liquids and free flowing solids

  • Range : Up to 24 Mtrs & 100 Mtrs
  • Housing : Paint coated aluminum housing
  • Enclosure of Electronics : IP 65 / NEMA 4
  • Output : 4 - 20 mA with HART Communication
  • Power Supply : 18 to 35V DC
  • Electrical Connection : DIN Connector (PG 11)
  • Sealing : Viton
  • Probe type : Mono cable, Dia : 8 mm, SS-1.4571 max
  • Probe Length : 24 Mtrs
  • Process Connection : 1.5" BSP with slip on 4" MS Flange, 15 mm thick

Paddle Type Level SwitchPLS


Applications :

  • Used in almost any dry bulk material application in hoppers, silo, bins & tanks
  • Durable rugged design, that is compatible with many bulk solids, palletized
    and granule applications

Features :

  • Simple but reliable switch for level control
  • Specially designed motor, which does not burn under lock rotor condition
  • Specially designed PTFE lip seal to prevent ingress of dust particles
    into main enclosure
  • Field replaceable paddle assembly to suit various application

Specification :

  • Mounting : Flanged , Standard 204 mm dia , 8 mm thick, 6 holes of 10
    mm dia on 178 mm pcd (Other flange size available, please specify )
  • Supply : 240 V AC, 50 Hz / 110 V AC ( Plesase specify )
  • Output : 1 C/O Relay contact rated for 5 Amp resistive at 230 V AC
  • Enclosure : Cast Al , Field mounting type , IP 65
  • Shaft extension : 150 mm standard

Ordering Principle :

Paddle type switches consist of motor, which drives a paddle through a planetary gearbox arrangement. The absence of material allows motor to turn the paddle uninterrupted. When the unit senses the presence of material via the restricted rotation of the paddle, the reversing torque actuates the internal micro-switches and alarms the unit, to give corresponding output signal.

Tilt SwitchTLS-602


Application :

Tilt switch is an electronic device specially developed for sensing the level of an approaching stockpile on stacker-reclaimed or material in hopper in a silo and to provide an output signal which can be used to initiate control action. It is used for measuring level of solids, powder, granules.

Features :

  • Adjustable ON & OFF delay, to prevent nuisance tripping
  • Omni-directional sensor probe
  • Less maintenance

Principle of Operation :

The Tilt switch comprises of two parts Sensor Probe & monitoring unit. The sensor probe is of tubular structure & is hanged by means of a chain link arrangement. When tilt probe gets tilted by material, the output relay gets actuated. The sensor probe unit has omni-directional sensing pattern and hence on whichever side its tilts, it provides output signal. It has built-in adjustable ON & OFF delays to take care of nuisance tripping due to wind flow or momentary jerks at the start and stop
of the machine


Specification TLS 602 :

  • Supply voltage : 110/240 V AC,50 Hz
  • OFF Delay : 1 tp 10 secs (Continously Adjustable)
  • ON Delay : 1 to 10 secs (Continously Adjustable)
  • Output contacts : 2 C/O relay contact
  • Contact rating : 5 Amp. resistive at 240 V AC
  • Sensor probe : 38 mm dia. * 250 mm long
  • Enclosure For Control circuit : Cast Al, IP 65 / DIN Rail

Vibrating Fork Type Level SwitchVFLS


Application :

Find application in food , packaging , Cement, steel & power generation industries for monitoring level of ore, fertilizer, food grains, coal, sand, chips, granules etc. Ideal for products that do not have heavy build-up on forks and can handle dense materials such as cement to extremely light products like styrene. Not recommended for slurries or in water with high turbidity

Features :

  • No calibration required, simple to install
  • Performance independent of material characteristics i.e. change in conductivity, moisture, di-electric constant
  • No moving parts, hence no wares and tears
  • Weatherproof enclosure, SS 316 for food industry
  • Field selectable operation logic : configurable high or low point switching

Specification :

  • Material Size : Up to 10 mm
  • Material bulk density : 0.05 Kg/dm3 minimum
  • Operating Pressure : 10 Kg/cm2 max
  • Fork Length : Max upto 2000 mm
  • Control supply : 230 V AC ( standard ) Other supply voltages on request )
  • Output : 2 C/O relay contact, rated for 5 Amp. resistive at 230 V AC
  • Ambient Temp : 60 degree cent max
  • Temp in vessel : 150 degree cent max
  • Enclosure : Cast Al, IP 65, integral with probe


Principle of Operation :

Vibrating Fork Level switch contain Piezo-electric crystal in the probe, which
causes the fork to vibrate at a frequency of 125 Hz. It detects the presence or
absence of material and actuate a relay.. It gives point output, indicating
high & low level alarm. It is a compact and robust design, suitable for side & top mounting. The constant vibration of the fork provides self-cleaning characteristics.
The change in vibration is detected by circuit which causes the relay to change state
after few seconds delay. When fork is free from material relay reverts to its normal condition.