Contech Engineers, Turbhe
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Panel Meters

We have gained expertise in supplying a quality range of Panel Meters. These products are manufactured using high-grade material at our vendors' premises. Post-procurement, these products are stringently inspected on certain well-defined parameters of quality in order to rule out every possibility of defect. In our affordable range, we offer Process Indicators & Controllers, Flow Totalizer, Sensors, CUB5 Analog Panel Meters, Miniature Displays and Digital Panel Meters.

Speed-O-Tester (SSI Series)


Speed-O-Tester (SSI Series)
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On offer from us is a wide and remarkable gamut of Speed-O-Tester (SSI Series). These intelligent & versatile speed limit switches ate ideal to be used for detecting two under and over speed of rotating, reciprocating or conveying equipment. The products we offer are capable of detecting a missing object amongst a series of continuously moving objects at a constant speed like a missing bucket in a bucket elevator and object on a conveyor belt. All our products are widely appreciated for giving an indication when the system is at rest (zero speed). Further, clients can avail these products from us in high temperature models upto 200º C.



  • Three independent relays for two under speed and over speed detection
  • Accurate pulse rate (speed) evaluation with optimum response
  • Easy to install
  • Flashing LED (in the probe head) indicates that the moving target is within the sensing range & facilitates target to detector distance setting
  • Easy to calibrate
  • The instrument can be calibrated prior to mounting, if the speed (buckets per min) of the system is known
  • Programming is user friendly & menu driven, accomplished by 4 push button keys
  • 4 digit LED display indicates the speed in pulses per minute (objects per min.) and aids in programming
  • Scaling factor available to achieve RPM indication
  • Built-in start-up delay programmable upto 99 seconds with provision for interlocking with controlled equipment
  • Programmable set point and switching hysteresis
  • 4 LED indicators provided. Green LED indicates receipt of input pulses (when flashing), 2 red LED’s indicate under speed alarm & over speed alarm and yellow LED indicates power ON status
  • A non-volatile memory stores the program parameters & calibration data indefinitely without the necessity of battery back-up



  • Monitors speed of conveyors and bucket elevators
  • Can also be used as a missing bucket detector and zero speed indicator
  • Special sensor detects moving ferrous objects from 100mm distance


System Description:-



  • Have a motion detector probe (MDP) with pre-amplifier (PA) & an evaluation unit (EU)
  • Designed for temperatures up to 120º C standard (200º C special)
  • Has a large sensing range of 100mm
  • Operates on the reluctance principle
  • It has SS casing with an aluminum mounting flange
  • A tri-clamp arrangement for easy adjustment of target distance
  • An electronic insert is housed in the cast aluminum probe head provided with a suitable cable gland
  • An electromagnetic shield covers the rear of the probe to minimize interference from stray electromagnetic fields
  • When MDP is suitably installed to sense the moving target, the PA outputs pulses whose frequency is proportional to the speed of moving target
  • These pulses are transmitted to the EU
  • A microprocessor in the EU processes the signal intelligently and operates the relays accordingly
  • When speed is less than the programmed set point, under speed relay changes state after considering the programmed value of hysteresis
  • If a missing object is detected, missing object relay operates & if speed is more than the programmed set point, time, the over speed relay operates
  • Desired value of start-up delay can be programmed upto 99 seconds
  • The output contacts of the relays can be used for control or alarm annunciation
  • While in operation, the display indicates the actual speed in pulses per minute


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Voltage Sensors


Voltage Sensors
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Product Brochure

We have in store an extensive range of Sensors for our valued clients. These products are manufactured by making use of premium quality raw material in accordance with the define quality parameters of the industry at our vendors’ base. Our clients can avail these products in different specifications from us as per their requirements. JUMO tech line ClO2 and O3, sensor for chlorine dioxide and ozone (202634). These membrane-covered amperometric sensors are used to measure the concentration of chlorine dioxide or ozone in aqueous solutions (drinking water, bath water, industrial water, process water and cooling water).The sensor for chlorine dioxide can be also used to measure chlorine dioxide from chlorite/chlorine and chlorite / hydrochloric acid plants. Moreover, the sensor for ozone can be used to measure electrolytically generated ozone among other things. The integrated electronics of the sensors provide a temperature-compensated current signal of 4 to 20 mA. Calibration is carried out in a downstream device (indicator, controller, recorder, PLC.).These sensors can be connected directly to a suitable display and control device. The display/control device JUMO dTRANS AS 02 (data sheet 202553) or the JUMO AQUIS 500 AS (data sheet 202568) is especially suitable for the combination with these sensors. These provide the voltage required for the supply of the sensors and allow for easy calibration of the measuring system.




  • Two-electrode principle
  • Easy calibration
  • Integrated temperature compensation
  • Proven measuring system




  • Drinking water disinfection
  • Swimming pool disinfection
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Yogesh Joshi
Contech Engineers, Turbhe
C Wing, 107 A, Punit Industrial Premises, TTC, M. I. D. C., Thane Belapur Road, Turbhe
Navi Mumbai - 400705, Thane, Maharashtra, India
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