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Dwyer A3000 500pa Photohlc Gg 0-500pa 240v


Dwyer Instruments Magnehelic Gauges -  Dwyer A3000 500pa Photohlc Gg 0-500pa 240v

28% 28 percent off rrp

Department: Dwyer Instruments Magnehelic Gauges
  Dwyer A3000 500pa Photohlc Gg 0-500pa 240v
    • 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.
  DWYER A3000 500PA PHOTOHLC GG 0-500PA 240V Photohelic Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic gage design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25 (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).
Photohelic Sensing - How It Works
In typical applications, these Dwyer switch/gages control between high and low pressure set points. When pressure changes, reaching either set point pressure, the infrared light to the limiting phototransistor is cut off by the helix-driven light shutter. The resulting phototransistor signal is electronically amplified to actuate its DPDT slave relay and switching occurs. Dead band between make and break is 1% of full scale or less - just enough to assure positive, chatter-free operation.

Relay-Transformer Features
A plastic housing protects all electronic components. Solid-state and integrated circuit electronics are on glass-epoxy printed circuit boards and self-extinguishing terminal boards.
Manufacture: Dwyer
Weight: GAGE SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult Factory. Accuracy: ±2% of full scale at 70°F (21.1°C). ±3% on -0 and ±4% on -00 models. Pressure Limits: -20 Hg. to 25 psig (-0.677 to 1.72 bar). MP
Dwyer
Code#:
A3000-500PA-230V
MyTub Code#: 303995
PDF File: Download pdf brochure 0.30mb
 
rrp£634.72
save£180.79
price£453.93

inc vat£544.72

Free UK delivery
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Excellent and very helpful service in all respects, thank you. Best regards Richard Avenell
...Richard Avenell
Great experience - sensible price, genuine part, swiftly delivered, regular updates on order process - happy man!
...Horse & Groom
Ordered easily and delivered as advertised. All good
...Paul Lincoln - OPS London Ltd
The delivery arrived eventually although there were some delays caused by a lack of stock and I was somewhat suprised to get a call on the delivery day from The Plumb Centre asking when I would be in to accept the delivery, I assumed that this item would be delivered by post. The delivery was made a couple of days later and once I had retrieved it from the bottom of our recycling bin I was eventually in a position to fit it. the fitting of the new hinge to the existing toilet set was complicated somewhat by both the new brackets and the screws being of different sizes to the originals. Due to this I ended up having to use both the existing hinge brackets and the existing screws which annoyed my slightly as I ended up throwing away brand new items that I had just bought. The modificati
...Chris Jarman
Pacakge delivered on time. However, the packaging was opened and in a sorry state when delivered. Lucikily there were no missing items.
...P Saujani
It was unfortunate that the first delivery of my item was lost in transit but full marks to myTub as they kept in helpful communication with me and sent a replacement item shortly after me reporting the non-delivery. I thoroughly recommend this company for their efficient and friendly service.
...Keith Richards
Good customer service, package arrived on time nice and quick with good communication Product as described thank you
...J Ryan
You found an obsolete pump which no one else could find for which I thank you. Now for another item,a Grant RFT thermostatic controller.My one has had the transmitter part damaged. Please advise.
...Malcolm Drysdale
Required replacement aerators for Magiglo open basket gas fire. This company had them in stock at a reasonable price in comparison to other firms. Ordered and was impressed by the customer care with continually update e mails on progress of the order. Delivery was personally carried out by the company and not by courier or post office which meant that the delicate fragile aerators had not been thrown about in transit. Good to see that in this day and age that a company still had Customer care at heart.
...Michael Fellows
The service is very good. Items are always delivered on time. Also when I text for any information I am always updated as soon as possible.
...Nicola Richards

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Dwyer A3000 500pa Photohlc Gg 0-500pa 240v