Switches

Switzer series 931 pressure switches are the latest addition to the main stream. These are very simple in construction, employing time proven german‘c’ and coiled bourdon of 316 ss ( ti ) material. One or two microswitches are directly operated by the bourdon tube. The pressure is set by the range adjustment screw for each microswitch and the setting adjustments are independent. The instrument is available both in weatherproof and flameproof enclosures.

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Series 200 pressure switches is a switzer mainstream product range for switching upto 75 bar and includes models for vacuum, compound and millibar ranges and high overload protection. Precision mechanisms are of stainless steel for arduous atmospheres and high humidity. Enclosures, sensing elements and switching modes can be combined to offer the variety needed to suit the demands of rapidly expanding industrial processes. Precise and accurate operation is obtained by using time proven seamless hydraulically formed bellows or diaphragm. Setpoint is continuously adjustable over the instrument range. A scale is provided for approximate switch setting.

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This compact version in Switzer series 900 Pressure Switches using components of high reliability is specifically designed for OEMs.The sensing element is a hydraulically formed seamless Phosphor Bronze or Stainless Steel Bellows mounted external to the weatherproof switch housing.The mechanical movements are restricted to absolute minimum which ensures long term stability.Style GH Pressure Die Cast Aluminium housing is best suited for harsh and outdoor mountings. The instrument is suitable for air, gas, water, steam, oil and several other chemicals which are compatible to Copper alloys and Stainless Steel.

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Rugged in construction, supreme in performance the S20 and 920 series pressure switches are designed as cost effective solutions to meet a variety of applications in the oil, gas, power, steel, Nuclear energy and petrochemical industries.The sensing element consists of a time-proven diaphragm sealed piston affording high integrity, reliable switching and a very high overload protection. Variety of combinations in features are available to make it versatile.

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Switzer rotary vane level switches are one more addition to the vast range of level switches and is best suited for bulk materials. Rotating vane driven by a most reliable synchronous motor ensures a very smooth continuous rotation until it is stopped by an approaching level of solids to the desired value. When the level of the solid raises andobstructs the vane, rotation of vane stops and a change-over occurs in the instrument quality snapacting microswitch. The motor also stops rotation and starts again when the level recedes and vane is free to rotate.

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Level Switch Model K–5720 is exclusively designed to monitor level of conductive & non-conductive liquids, such as chemicals, lubricating oil, compressor seal oil, water.The level is sensed by a PTC thermistor, which isto be fixed in the vessel or lube oil tank or sump at a location where the presence or absence of the medium in terms of level is to be monitored.When the tank is filled up, the level sensor is in contact with the liquid, and exhibits a low resistance, so the relay is in ‘OFF’ condition.When the liquid level goes down, the sensor is exposed to air and exhibits high resistance, switching the relay ‘ON’.When the liquid level is restored back to the required normal level and encompasses the sensor, its resistance once again reduces. The relay returns to the normal status automatically. An optional manual reset facility can be provided to restore the relay to its normal status. This feature ensures that the operating personnel confirm the availabilityof the liquid, while running an equipment.Status indicating LEDs are provided for Power ‘ON’ condition Red and Relay ‘ON’, absence of medium,Yellow.A 2 core cable of 2 metres length is provided withsensor as standard. Longer cable upto a maximum of 5 metres can also be provided if required by user.

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Switzer Series 720 / 730 vapour pressure and Series 770 gas filled Temperature Switches are devices using the time-proven mechanisms of Series 200 pressure switches.The precision mechanisms are of stainless steel for arduous atmospheres and high humidity.Models 721, 723, 781 and 771, 773 & 774 have capillary systems for remote sensing. Models 731, 733 & 734 have rigid-stem thermal systems. Several convenient standard temperature ranges are available. Setpoint is continuously adjustable over the instrument range. A calibrated scale is provided for approximate switch setting.

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Switzer model 711 electronic pressure switch is a versatile electronic instrument matching with contemporary designs with all the fundamentally required features for basic control functions.
the instrument is provided with lcd indication, two
independent set point on-off control relay outputs and analog output of 4 to 20ma. Operational settings are done through 3 keys on the front membrane keypad.

Switzer Series 720 / 730 vapour pressure and Series 770 gas filled Temperature Switches are devices using the time-proven mechanisms of Series 200 pressure switches. The precision mechanisms are of stainless steel for arduous atmospheres and high humidity.Models 721, 723, 781 and 771, 773 & 774 have capillary systems for remote sensing.Models 721, 723, 781 and 771, 773 & 774 have capillary systems for remote sensing. Models 731, 733 & 734 have rigid-stem thermal systems.Several convenient standard temperature ranges are available. Setpoint is continuously adjustable over the instrument range. A calibrated scale is provided for approximate switch setting.

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Switzer Series 720 / 730 vapour pressure and Series 770 gas filled Temperature Switches are devices using the time-proven mechanisms of Series 200 pressure switches. The precision mechanisms are of stainless steel for arduous atmospheres and high humidity.Models 721, 723, 781 and 771, 773 & 774 have capillary systems for remote sensing. Models 731, 733 & 734 have rigid-stem thermal systems. Several convenient standard temperature ranges are available. Setpoint is continuously adjustable over the instrument range. A calibrated scale is provided for approximate switch setting.

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