Fischer pressure transmitter Building technology Differential Pressure Gauge DA12

Gas Alarm offer Fischer Germany differential pressure gauge DA12 is suitable for measurement of pressure, differential pressure and partial vacuum in field of industrial and sanitary techniques. Typical applications are measurements of differential pressure between forward- and return flow in heating systems and monitoring of filters, compressors and blowers. Measuring system and pressure chamber are available in different materials to meet various requirements.

Principles of Operation: This differential pressure instrument is based on a rugged and uncomplicated diaphragm movement, suitable for overpressure-, partial vacuum- and differential pressure measurements. Operating principle of system is identical for all applications of this type.

Features:
 

• Measuring ranges: 0-400 mbar to 0-25 bar (see Ordering Code)
• Nominal pressure: 25 bar
• Max. static operating pressure: acc. to measuring range (see Ordering Code)
• Max. pressure load: one-sided overpressure protected up to nominal pressure on (+)- and (−)-side of diaphragm, partial vacuum protected.
• Perm. ambient temperature: -10...+70°C (max. 55°C in case of SEV-approval)
• Perm. medium temperature: 70°C
• Protection class: IP54 acc. to DIN EN 60529
• Linearity: ± 2.5 % FS
• Zero point adjustment: located in the dial
• Pressure connection female thread G¼, cutting ring connection for 6 / 8 / 10 mm tube of brass / zinced steel / chrome-nickel-steel male connection shank G¼ B DIN EN 837

Measuring system:
 

• Range ≤ 10 bar: diaphragm measuring system, diaphragms of reinforced elastomere
• Range ≥ 16 bar: diaphragm measuring system, diaphragm of DURATHERM®

Materials:
 

• Pressure chamber: • aluminum Gk Al Si 10 Mg, varnished black
• Aluminium Gk Al Si 10 Mg surface protected with HART-COAT®
• chrome-nickel-steel 1.4305
• Measuring diaphragm: • diaphragm measuring system and gaskets of NBR or Viton®,
• diaphragm of DURATHERM® Ni Cr Co-alloy
• Materials, media: stainless steel 1.4310, 1.4305
• Materials, housing: Makrolon
• Weight: pressure chamber Al = 1.2 kg, pressure chamber 1.4305 = 3.5 kg
• Pipe mounting: pressure connections  “+", “−" symbols
• by screwed in cutting ring or clamping ring connection
• by screwed in connection shank acc. to DIN EN 837 for nipple fitting acc. to DIN 16284
• Wall mounting: 3 fastening elements
• Panel mounting: with front ring, ∅ 132 mm