Dwyer - A3000 Photohelic - Switch/Gauge - 0-2KPA - A3000-2KPA-240VAC

Features

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism ,Cover is clear polycarbonate plastic

Gage pointer and light shutter are mounted on helix and balancing counterweight. Shutter passes through slot in optical limit switch to expose phototransistors to integral infrared light source or mask them depending on applied pressure

Light shield effectively protects phototransistors from strong outside light sources yet allows free pointer movement. It also gives interior a clean "finished" look

Optical limit switches are used for reliability and long service life. Attached directly to set pointers, they are individually aligned to assure precise switching accuracy

Semi-Flexible drive shaft connects to set point knobs

Zero adjustment screw connects to screw in cover to adjust zero pressure reading

Plastic enclosure protects electronic components and electrical connections

Polycarbonate connection or terminal board is self-extinguishing

Glass epoxy printed circuit boards for durability and permanence

Load relays are DPDT with latching feature for maximum application versatility

Electronics are designed to operate on 50/60 Hz, 120 volt current with 10% over or under voltage. Special units for other voltages are available

Switch set pointers show switch settings at all times

Spring loaded friction clutch prevents operator damage of set point mechanism

3-in-1 instrument allows the reduction of several instruments with one product, saving inventory, installation time and money

Patented design and 1% full scale dead band provides quick response to pressure changes means no delay in switching and chatter-free operation

A wide range of models that can meet pressure measurement specifications from low to very high

Applications
 • Air Conditioning Systems, Clean RoomsFume and Exhaust Systems

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