Barton chart recorders are the industry standard for accurate, reliable measurement and recording of pressure, differential pressure, and temperature in a wide variety of applications. In addition, DP models utilize Barton’s rupture-proof bellows DPU as the actuating unit – with features like overrange protection and pulsation dampening
(on some models).

Common Components

Case – is made of rugged,lightweight die-cast aluminum that features a built-in rain-shield. It is finished in polyurethane electrostatic powder paint that has a high resistance to weathering, scratches, and industrial fumes. aircraft-type door hinge (made of 302 SST) provides excellent resistance to salt spray and H2S. A closed neoprene gasket, non-absorbent to fluids and resistant to oils and most solvents, provides the seal between the door and the case.  Optional “S” versions use a stainless steel case or a corrosion resistant “offshore coating” for harsh saltwater environments.

Chart Drive – Available in battery and spring-wound versions with a wide variety of chart speeds. All chart drives, with simple positive chart lock hub, are interchangeable.

NuFlo™ Charts – are made from “woodfree” paper – a special low shrinkage high quality product that eliminate eccentric and elliptical errors. Charts are shrink wrapped to help maintain the factory default size until it is opened by the user. Once a box of charts is opened, it can be stored in the supplied plastic re-sealable storage bag.

Recording Mechanism – All partsare stainless steel for long life. The pen mount is exceptionally rugged and pen shafts are fitted with ball pivots to minimize friction. All links are adjustable, with micrometer adjustments for accurate calibration. All adjustments have screwdriver slots to simplify calibration. Disposable pens are standard.
 
Pressure Elements – Used in Models 202E, 242E, and J8A are precision wound helical-type available in a variety of materials – pressure ranges from 0-30-in. mercury vacuum (0 - 14.7 psi/1 bar) to 0 - 30,000 psi (0 - 2,068 bar). The Model 202N uses a K-Monel element – pressure ranges from 0 - 250 psi (0 - 17 bar) to 0 - 6,000 psi (0 - 414 bar).
Connections available in 1/4-in. NPT for ranges less than 10,000 psi (689 bar). Ranges greater than 10,000 psi
(689 bar) utilize an Aminco 9/16–18 (1/4-in. ODT) female connection.
 
Thermal Systems – Consist of a bourdon tube, a capillary with stainless steel armor, and a bulb with a bendable extension. All parts are stainless steel. Systems are available in Class V (mercury fill with an 11/16-in. OD bulb) or Class I (hydrocarbon fill w/ a 3/8-in. OD bulb). Temperature ranges for each design are listed below. A thermal system must have a span of more than 50°F (27°C) and the high temperature limit must be greater than 95°F (35°C).
• Class VA (fully compensated) -40° to 600°F (-40° to 315°C)
• Class VB (case compensated):-40° to 600°F (-40° to 315°C)
• Class IA (fully compensated) –temperature range varies with fill material
• ethyl-benzene, -125° to 350°F (-87° to 177°C)
• kerosene, -20° to 500°F(-29° to 260°C)
• alcohol, -200° to 150°F (-129° to 66°C)
• Class IB (case compensated) -temperature range varies with fill material
• ethyl-benzene, -125° to 350°F(-87° to 177°C)
• kerosene, -20° to 500°F (-29° to 260°C)
• alcohol, -200° to 150°F (-129° to 66°C)
• Accuracy: +/- 1.0% of F.S.
• Hardware: Capillary standard length is 10 ft. (additional lengths available)