A3302 | Pressure switch/gage | range 1-0-1" w.c. | Dwyer Instruments

Dwyer Instruments NCO-A3302 1-0-1 PHOTOHELIC GAGE Photohelic gage is ideally suited for applications requiring the measurement of pressure, vacuum, or differential pressure. The Dwyer Photohelic gage operates on the force-balance principle and uses a photocell to detect position changes. Pressure changes are indicated by an illuminated scale. Key Features: - ±3% full-scale accuracy - Measures pressure, vacuum, or differential pressure - Ranges from 0-0.5" W.C. to 0-15 psi - 316L stainless steel diaphragm - 316L stainless steel housing - Integral mounting bracket Benefits: - Long life and durability - Reliable and accurate - Easy to read - Versatile - Field-adjustable Applications: - Airflow monitoring - Filter monitoring - Leak detection - Pressure calibration - Vacuum measurement Specifications: - Accuracy: ±3% of full scale - Ranges: 0-0.5" W.C. to 0-15 psi - Diaphragm: 316L stainless steel - Housing: 316L stainless steel - Electrical: 120 VAC, 60 Hz - Weight: 1 lb. Shop now for the best prices and fast shipping on all your industrial supply needs at our HVAC supply store!

Series A3000 Photohelic® Pressure Switch/Gage

• 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.