Differential Pressure Indicators

Differential Pressure Indicators


Switzer style 105/ 106 sensor unit consists of an assembly of sensitive multiple diaphragm (capsule) or bellows which responds to differential pressure across it. The output motion of the diaphragm/ bellows assembly is transmitted by a free spring torque tube through the wall of the pressure housing. The output motion of the torque tube drives an external pointer movement. The pointer movement and dial are fitted in a weatherproof dial housing. Switzer style 109 is powered by a test gauge quality bourdon tube assembly. It is encapsulated in a high pressure chamber fitted with a pressure connection to the inside of the bourdon tube and a second connection to the pressure chamber. The bourdon assembly indicates the difference in pressure applied inside and outside the bourdon tube. Switzer style 180 DP gauges are Diaphragm operated type with ranges 0-125 mmWC to 0-1.0 bar. The gauge is isolated from the pressure changes without using any mechanical seal by means of a unique magnetically coupled movement. These DP gauges can be installed in level monitoring (or) DP measurement. Model 180 can be provided with a SPCO microswitch to initiate alarm signal or system shut down for high or low limit. Switzer style 120 gauges comprises of a piston opposed by a calibrated spring. A barium ferrite magnet embedded to the piston actuates a rotary magnet which in turn drives the indicating pointer. An excellent choice for monitoring filters and pressure differences. Features Bellows, Bourdon, Diaphragm & Piston operated gauges * Ranges : 250 mm WC to 350 bar * Alarm Switching - through Reed & Micro-switches and also electronic systems * 270? Pointer travel * Centre Zero on request * No liquid filled sensor thus eliminating complicated temperature compensation, failure due to leaks and loss of liquid * Over-pressure protection by a two-way over-range relief valve * Buna-N seal standard Viton? seals optional Models available are 105, 106, 109, 120 and 180 Switzer Mid-West Locked Logic Control (LLC) system is an all solid state switching facility available in 105, 106 & 109 Differential pressure indicating instruments for one or two set points. This LLC system utilizes miniaturized solid state components that have proved their reliability and ruggedness in a variety of industrial process applications. These components have been combined to give a new generation of indicating controls. This concept provides units that are competitively priced with superior performance.

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